UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

_______________________________
FORM 10-K

_______________________________
(Mark One)
xANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the fiscal year ended December 31, 20182020
or
¨TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from              to             
Commission File Number: 001-32886

_______________________________
clr-20201231_g1.jpg
CONTINENTAL RESOURCES, INC.
(Exact name of registrant as specified in its charter)

_______________________________
Oklahoma73-0767549
(State or other jurisdiction of
incorporation or organization)
(I.R.S. Employer
Identification No.)
20 N. Broadway,Oklahoma City, OklahomaOklahoma73102
(Address of principal executive offices)(Zip Code)
Registrant’s telephone number, including area code: (405) 234-9000
Securities registered pursuant to Section 12(b) of the Act:
Title of each class Trading symbol(s)Name of each exchange on which registered
Common Stock, $0.01 par valueCLRNew York Stock Exchange
Securities registered pursuant to Section 12(g) of the Act: None

_______________________________
Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes  x    No  ¨
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    Yes  ¨    No  x
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨
Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  x    No  ¨
Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405 of this chapter) is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.  ¨
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.
Large accelerated filerxAccelerated filer
Non-accelerated filerSmaller reporting company
Large accelerated filerxAccelerated filer¨
Non-accelerated filer
¨
Smaller reporting company¨
Emerging growth company¨
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨
Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☒
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).    Yes  ¨    No  x
The aggregate market value of the voting and non-voting common equity held by non-affiliates of the registrant as of June 30, 20182020 was approximately $5.6$1.4 billion, based upon the closing price of $64.76$17.53 per share as reported by the New York Stock Exchange on such date.
376,014,925365,193,888 shares of our $0.01 par value common stock were outstanding on January 31, 2019.2021.


DOCUMENTS INCORPORATED BY REFERENCE
Portions of the definitive Proxy Statement of Continental Resources, Inc. for the Annual Meeting of Shareholders to be held in May 2019,2021, which will be filed with the Securities and Exchange Commission within 120 days after the end of the fiscal year, are incorporated by reference into Part III of this Form 10-K.





Table of Contents
PART I
PART I
Item 1.
Item 1A.
Item 1B.
Item 2.
Item 3.
Item 4.
PART II
Item 5.
Item 6.
Item 7.
Item 7A.
Item 8.
Item 9.
Item 9A.
Item 9B.
PART III
Item 10.
Item 11.
Item 12.
Item 13.
Item 14.
PART IV
Item 15.






Glossary of Crude Oil and Natural Gas Terms
The terms defined in this section may be used throughout this report:
“basin” A large natural depression on the earth’s surface in which sediments generally brought by water accumulate.
“Bbl” One stock tank barrel, of 42 U.S. gallons liquid volume, used herein in reference to crude oil, condensate or natural gas liquids.
“Bcf” One billion cubic feet of natural gas.
“Boe” Barrels of crude oil equivalent, with six thousand cubic feet of natural gas being equivalent to one barrel of crude oil based on the average equivalent energy content of the two commodities.
“Btu” British thermal unit, which represents the amount of energy needed to heat one pound of water by one degree Fahrenheit and can be used to describe the energy content of fuels.
“completion” The process of treating a drilled well followed by the installation of permanent equipment for the production of crude oil and/or natural gas.
“conventional play” An area believed to be capable of producing crude oil and natural gas occurring in discrete accumulations in structural and stratigraphic traps.
“DD&A” Depreciation, depletion, amortization and accretion.
de-risked” Refers to acreage and locations in which the Company believes the geological risks and uncertainties related to recovery of crude oil and natural gas have been reduced as a result of drilling operations to date. However, only a portion of such acreage and locations have been assigned proved undeveloped reserves and ultimate recovery of hydrocarbons from such acreage and locations remains subject to all risks of recovery applicable to other acreage.
“developed acreage” The number of acres allocated or assignable to productive wells or wells capable of production.
“development well” A well drilled within the proved area of a crude oil or natural gas reservoir to the depth of a stratigraphic horizon known to be productive.
“dry hole” Exploratory or development well that does not produce crude oil and/or natural gas in economically producible quantities.
“enhanced recovery” The recovery of crude oil and natural gas through the injection of liquids or gases into the reservoir, supplementing its natural energy. Enhanced recovery methods are sometimes applied when production slows due to depletion of the natural pressure.
“exploratory well” A well drilled to find crude oil or natural gas in an unproved area, to find a new reservoir in an existing field previously found to be productive of crude oil or natural gas in another reservoir, or to extend a known reservoir beyond the proved area.
“field” An area consisting of a single reservoir or multiple reservoirs all grouped on, or related to, the same individual geological structural feature or stratigraphic condition. The field name refers to the surface area, although it may refer to both the surface and the underground productive formations.
“formation” A layer of rock which has distinct characteristics that differs from nearby rock.
“fracture stimulation”A process involving the high pressure injection of water, sand and additives into rock formations to stimulate crude oil and natural gas production. Also may be referred to as hydraulic fracturing.
“gross acres” or “gross wells” Refers to the total acres or wells in which a working interest is owned.
“held by production” or “HBP” Refers to an oil and gas lease continued into effect into its secondary term for so long as a producing oil and/or gas well is located on any portion of the leased premises or lands pooled therewith.
“horizontal drilling” A drilling technique used in certain formations where a well is drilled vertically to a certain depth and then drilled horizontally within a specified interval.
“MBbl” One thousand barrels of crude oil, condensate or natural gas liquids.
“MBoe” One thousand Boe.
“Mcf” One thousand cubic feet of natural gas.

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“MMBo” One million barrels of crude oil.
“MMBoe” One million Boe.
“MMBtu” One million British thermal units.
“MMcf” One million cubic feet of natural gas.
“net acres” or “net wells” Refers to the sum of the fractional working interests owned in gross acres or gross wells.
"Net crude oil and natural gas sales" Represents total crude oil and natural gas sales less total transportation expenses. Net crude oil and natural gas sales presented herein is a non-GAAP measure for 2018.measure. See Part II, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations—Non-GAAP Financial Measures for a discussion and calculation of suchthis measure.
"Net sales price" Represents the average net wellhead sales price received by the Company for its crude oil or natural gas sales after deducting transportation expenses. Such amountNet sales price is calculated by taking revenues less transportation expenses divided by sales volumes for a period, whether for crude oil or natural gas, as applicable. Net sales prices presented herein for 2018, 2019, and 2020 are non-GAAP measures for 2018.measures. See Part II, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations—Non-GAAP Financial Measures for a discussion and calculation of such measures.this measure.
“NYMEX” The New York Mercantile Exchange.
“pad drilling” or “pad development” Describes a well site layout which allows for drilling multiple wells from a single pad resulting in less environmental impact and lower per-well drilling and completion costs.
“play” A portion of the exploration and production cycle following the identification by geologists and geophysicists of areas with potential crude oil and natural gas reserves.
“productive well” A well found to be capable of producing hydrocarbons in sufficient quantities such that proceeds from the sale of the production exceed production expenses and taxes.
“prospect” A potential geological feature or formation which geologists and geophysicists believe may contain hydrocarbons. A prospect can be in various stages of evaluation, ranging from a prospect that has been fully evaluated and is ready to drill to a prospect that will require substantial additional seismic data processing and interpretation.
“proved reserves” The quantities of crude oil and natural gas, which, by analysis of geoscience and engineering data, can be estimated with reasonable certainty to be economically producible from a given date forward, from known reservoirs and under existing economic conditions, operating methods, and government regulations prior to the time at which contracts providing the right to operate expire, unless evidence indicates renewal is reasonably certain.
“proved developed reserves” Reserves expected to be recovered through existing wells with existing equipment and operating methods.
“proved undeveloped reserves” or “PUD” Proved reserves expected to be recovered from new wells on undrilled acreage or from existing wells where a relatively major expenditure is required for completion.
“PV-10” When used with respect to crude oil and natural gas reserves, PV-10 represents the estimated future gross revenues to be generated from the production of proved reserves using a 12-month unweighted arithmetic average of the first-day-of-the-month commodity prices for the period of January to December, net of estimated production and future development and abandonment costs based on costs in effect at the determination date, before income taxes, and without giving effect to non-property-related expenses, discounted to a present value using an annual discount rate of 10% in accordance with the guidelines of the Securities and Exchange Commission (“SEC”). PV-10 is not a financial measure calculated in accordance with generally accepted accounting principles (“GAAP”) and generally differs from Standardized Measure, the most directly comparable GAAP financial measure, because it does not include the effects of income taxes on future net revenues. Neither PV-10 nor Standardized Measure represents an estimate of the fair market value of the Company’s crude oil and natural gas properties. The Company and others in the industry use PV-10 as a measure to compare the relative size and value of proved reserves held by companies without regard to the specific tax characteristics of such entities.
“reservoir” A porous and permeable underground formation containing a natural accumulation of producible crude oil and/or natural gas that is confined by impermeable rock or water barriers and is separate from other reservoirs.
“residue gas” Refers to gas that has been processed to remove natural gas liquids.

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“resource play” Refers to an expansive contiguous geographical area with prospective crude oil and/or natural gas reserves that has the potential to be developed uniformly with repeatable commercial success due to advancements in horizontal drilling and completion technologies.
“royalty interest” Refers to the ownership of a percentage of the resources or revenues produced from a crude oil or natural gas property. A royalty interest owner does not bear exploration, development, or operating expenses associated with drilling and producing a crude oil or natural gas property.
“SCOOP” Refers to the South Central Oklahoma Oil Province, a term used to describe properties located in the Anadarko basin of Oklahoma in which we operate. Our SCOOP acreage extends across portions of Garvin, Grady, Stephens, Carter, McClain and Love counties of Oklahoma and has the potential to contain hydrocarbons from a variety of conventional and unconventional reservoirs overlying and underlying the Woodford formation.
“STACK” Refers to Sooner Trend Anadarko Canadian Kingfisher, a term used to describe a resource play located in the Anadarko Basin of Oklahoma characterized by stacked geologic formations with major targets in the Meramec, Osage and Woodford formations. A significant portion of our STACK acreage is located in over-pressured portions of Blaine, Dewey and Custer counties of Oklahoma.
“spacing” The distance between wells producing from the same reservoir. Spacing is often expressed in terms of acres (e.g., 640-acre spacing) and is often established by regulatory agencies.
“Standardized Measure” Discounted future net cash flows estimated by applying the 12-month unweighted arithmetic average of the first-day-of-the-month commodity prices for the period of January to December to the estimated future production of year-end proved reserves. Future cash inflows are reduced by estimated future production and development costs based on period-end costs to determine pre-tax net cash inflows. Future income taxes, if applicable, are computed by applying the statutory tax rate to the excess of pre-tax cash inflows over the tax basis in the crude oil and natural gas properties. Future net cash inflows after income taxes are discounted using a 10% annual discount rate.
“three dimensional (3D) seismic” Seismic surveys using an instrument to send sound waves into the earth and collect data to help geophysicists define the underground configurations. 3D seismic provides three-dimensional pictures. We typically use 3D seismic testing to evaluate reservoir presence and/or continuity. We also use 3D seismic to identify sub-surface hazards to assist in steering, avoiding hazards and determining where to perform optimized completions.
“unconventional play” An area believed to be capable of producing crude oil and natural gas occurring in accumulations that are regionally extensive, but may lack readily apparent traps, seals and discrete hydrocarbon-water boundaries that typically define conventional reservoirs. These areas tend to have low permeability and may be closely associated with source rock, as is the case with oil and gas shale, tight oil and gas sands and coalbed methane, and generally require horizontal drilling, fracture stimulation treatments or other special recovery processes in order to achieve economic production. In general, unconventional plays require the application of more advanced technology and higher drilling and completion costs to produce relative to conventional plays.
“undeveloped acreage” Lease acreage on which wells have not been drilled or completed to a point that would permit the production of commercial quantities of crude oil and/or natural gas.
“unit” The joining of all or substantially all interests in a reservoir or field, rather than a single tract, to provide for development and operation without regard to separate property interests. Also, the area covered by a unitization agreement.
“well bore” The hole drilled by the bit that is equipped for crude oil or natural gas production on a completed well. Also called a well or borehole.
“working interest” The right granted to the lessee of a property to explore for and to produce and own crude oil, natural gas, or other minerals. The working interest owners bear the exploration, development, and operating costs on either a cash, penalty, or carried basis.

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Cautionary Statement for the Purpose of the “Safe Harbor” Provisions of the Private Securities Litigation Reform Act of 1995
This report and information incorporated by reference in this report include “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. All statements other than statements of historical fact, including, but not limited to, forecasts or expectations regarding the Company’s business and statements or information concerning the Company’s future operations, performance, financial condition, production and reserves, schedules, plans, timing of development, rates of return, budgets, costs, business strategy, objectives, and cash flows, included in this report are forward-looking statements. The words “could,” “may,” “believe,” “anticipate,” “intend,” “estimate,” “expect,” “project,” “budget,” “target,” “plan,” “continue,” “potential,” “guidance,” “strategy” and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain such identifying words.
Forward-looking statements may include, but are not limited to, statements about:
our strategy;
our business and financial plans;
our future operations;
our crude oil and natural gas reserves and related development plans;
technology;
future crude oil, natural gas liquids, and natural gas prices and differentials;
the timing and amount of future production of crude oil and natural gas and flaring activities;
the amount, nature and timing of capital expenditures;
estimated revenues, expenses and results of operations;
drilling and completing of wells;
competition;shutting in of production and the resumption of production activities;
competition;
marketing of crude oil and natural gas;
transportation of crude oil, natural gas liquids, and natural gas to markets;
property exploitation, property acquisitions and dispositions, or joint development opportunities;
costs of exploiting and developing our properties and conducting other operations;
our financial position;position, dividend payments, bond repurchases, or share repurchases;
generalthe impact of the COVID-19 (novel coronavirus) pandemic on economic conditions;conditions, the demand for crude oil, the Company's operations and the operations of its customers, suppliers, and service providers;
credit markets;
our liquidity and access to capital;
the impact of governmental policies, laws and regulations, as well as regulatory and legal proceedings involving us and of scheduled or potential regulatory or legal changes;
our future operating and financial results;
our future commodity or other hedging arrangements; and
the ability and willingness of current or potential lenders, hedging contract counterparties, customers, and working interest owners to fulfill their obligations to us or to enter into transactions with us in the future on terms that are acceptable to us.
Forward-looking statements are based on the Company’s current expectations and assumptions about future events and currently available information as to the outcome and timing of future events. Although the Company believes these assumptions and expectations are reasonable, they are inherently subject to numerous business, economic, competitive, regulatory and other risks and uncertainties, most of which are difficult to predict and many of which are beyond the Company’s control. No assurance can be given that such expectations will be correct or achieved or that the assumptions are accurate or will not change over time. The risks and uncertainties that may affect the operations, performance and results of the business and forward-looking statements include, but are not limited to, those risk factors and other cautionary statements described under Part I, Item 1A. Risk Factors and elsewhere in this report, registration statements we file from time to time with the Securities and Exchange Commission, and other announcements we make from time to time.
Many of the foregoing risks and uncertainties have been, and may further be, exacerbated by the COVID-19 pandemic and any consequent worsening of the global economic environment. New factors emerge from time to time, and it is not possible for us to predict all such factors. Readers are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date on which such statement is made. Should one or more of the risks or uncertainties described in this report occur, or should underlying assumptions prove incorrect, the Company’s actual results and plans could differ materially from those
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expressed in any forward-looking statements. All forward-looking statements are expressly qualified in their entirety by this cautionary statement.
Except as expressly stated above or otherwise required by applicable law, the Company undertakes no obligation to publicly correct or update any forward-looking statement whether as a result of new information, future events or circumstances after the date of this report, or otherwise.

v
iv




Part I
You should read this entire report carefully, including the risks described under Part I, Item 1A. Risk Factors and our consolidated financial statements and the notes to those consolidated financial statements included elsewhere in this report. Unless the context otherwise requires, references in this report to “Continental Resources,” “Continental,” “we,” “us,” “our,” “ours” or “the Company” refer to Continental Resources, Inc. and its subsidiaries.
 
Item 1.Business
Item 1.    Business
General
We are an independent crude oil and natural gas company formed in 1967 engaged in the exploration, development, and production of crude oil and natural gas primarily in the North, South and East regions of the United States. Additionally, we pursue the acquisition and management of perpetually owned minerals located in certain of our key operating areas. The North region consists of properties north of Kansas and west of the Mississippi River and includes North Dakota Bakken, Montana Bakken, and the Red River units. The South region includes all properties south of Nebraska and west of the Mississippi River including various plays in the SCOOP and STACK areas of Oklahoma. The East region is primarily comprised of undeveloped leasehold acreage east of the Mississippi River with no significant drilling or production operations.
A substantial portion of ourOur operations is located in the North region with that region comprising 59%comprised 55% of our crude oil and natural gas production and 73%65% of our crude oil and natural gas revenues for the year ended December 31, 2018.2020. The Company’s principal producing properties in the North region are located in the Bakken field of North Dakota and Montana. Approximately 55%48% of our proved reserves as of December 31, 20182020 are located in the North region. Our operations in the South region continue to expand with our increased activity in the SCOOP and STACK plays and that region comprised 41%45% of our crude oil and natural gas production, 27%35% of our crude oil and natural gas revenues, and 45%52% of our proved reserves as of and for the year ended December 31, 2018.2020.
We focus our exploration activities in large new or developing crude oil and natural gas plays that provide us the opportunity to acquire undeveloped acreage positions for future drilling operations. We have been successful in targeting large repeatable resource plays where three dimensional seismic, horizontal drilling, geosteering technologies, advanced completion technologies (e.g., fracture stimulation), pad/row development, and enhanced recovery technologies allow us to develop and produce crude oil and natural gas reserves from unconventional formations. As a result of these efforts, we have grown substantially through the drill bit.
As of December 31, 2018,2020, our proved reserves were 1,5221,104 MMBoe, with proved developed reserves representing675 627 MMBoe, or 44%57%, of our total proved reserves. The standardized measure of our discounted future net cash flows totaled $15.7$4.65 billion at December 31, 2018.2020. For 2018,2020, we generated crude oil and natural gas revenues of $4.68$2.56 billion and operating cash flows of $3.46$1.42 billion. Crude oil accounted for 56%53% of our total production and 81%86% of our crude oil and natural gas revenues for 2018.2020. Our total production averaged 298,190300,090 Boe per day for 2018,2020, a 23% increasedecrease of 12% compared to 2017.2019.
The table below summarizes our total proved reserves, PV-10 (non-GAAP) and net producing wells as of December 31, 2018,2020, average daily production for the quarter ended December 31, 20182020 and the reserve-to-production index in our principal operating areas. The PV-10 values shown below are not intended to represent the fair market value of our crude oil and natural gas properties. There are numerous uncertainties inherent in estimating quantities of crude oil and natural gas reserves. See Part I, Item 1A. Risk Factors and “Critical Accounting Policies and Estimates” in Part II, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations of this report for further discussion of uncertainties inherent in the reserve estimates.


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 December 31, 2018 Average daily
production for
fourth quarter
2018
(Boe per day)
   Annualized
reserve/production
index (2)
December 31, 2020Average daily
production for
fourth quarter
2020
(Boe per day)
 Annualized
reserve/production
index (2)
 Proved
reserves
(MBoe)
 Percent
of total
 PV-10 (1)
(In millions)
 Net
producing
wells
 Percent
of total
  Proved
reserves
(MBoe)
Percent
of total
PV-10 (1)
(In millions)
Net
producing
wells
Percent
of total
North Region:              North Region:
Bakken field              Bakken field
North Dakota Bakken 767,837
 50.4% $11,374
 1,446
 177,358
 54.7% 11.9
North Dakota Bakken483,238 43.8 %$2,235 1,631 177,802 52.4 %7.4 
Montana Bakken 30,168
 2.0% 473
 263
 6,478
 2.0% 12.8
Montana Bakken25,754 2.3 %128 254 5,339 1.6 %13.2 
Red River units              Red River units
Cedar Hills 28,771
 1.9% 455
 129
 6,598
 2.0% 11.9
Cedar Hills17,670 1.6 %142 130 5,323 1.6 %9.1 
Other Red River units 3,661
 0.2% 55
 114
 2,446
 0.8% 4.1
Other Red River units932 0.1 %116 1,467 0.4 %1.7 
Other 31
 % 1
 2
 33
 % 2.6
South Region:              South Region:
SCOOP 459,103
 30.2% 4,742
 310
 67,244
 20.8% 18.7
SCOOP478,196 43.3 %2,139 463 107,060 31.6 %12.2 
STACK 230,175
 15.1% 1,528
 205
 62,947
 19.4% 10.0
STACK97,967 8.9 %241 299 42,281 12.4 %6.3 
Other 2,619
 0.2% 22
 120
 897
 0.3% 8.0
Other— %35 — %0.4 
Total 1,522,365
 100.0% $18,650
 2,589
 324,001
 100.0% 12.9
Total1,103,762 100.0 %$4,893 2,895 339,307 100.0 %8.9 
 
(1)
(1)PV-10 is a non-GAAP financial measure and generally differs from Standardized Measure, the most directly comparable GAAP financial measure, because it does not include the effects of income taxes on future net revenues of approximately $239 million. Neither PV-10 nor Standardized Measure represents an estimate of the fair market value of our crude oil and natural gas properties. We and others in the crude oil and natural gas industry use PV-10 as a measure to compare the relative size and value of proved reserves held by companies without regard to the specific income tax characteristics of such entities. See Part II, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations—Non-GAAP Financial Measures for further discussion.
(2)The Annualized Reserve/Production Index is the number of years that estimated proved reserves would last assuming current production continued at the same rate. This index is calculated by dividing annualized fourth quarter 2020 production into estimated proved reserve volumes as of December 31, 2020.
PV-10 is a non-GAAP financial measure and generally differs from Standardized Measure, the most directly comparable GAAP financial measure, because it does not include the effects of income taxes on future net revenues of approximately $3.0 billion. Neither PV-10 nor Standardized Measure represents an estimate of the fair market value of our crude oil and natural gas properties. We and others in the crude oil and natural gas industry use PV-10 as a measure to compare the relative size and value of proved reserves held by companies without regard to the specific income tax characteristics of such entities. See Part II, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations—Non-GAAP Financial Measures for further discussion.
(2)The Annualized Reserve/Production Index is the number of years that estimated proved reserves would last assuming current production continued at the same rate. This index is calculated by dividing annualized fourth quarter 2018 production into estimated proved reserve volumes as of December 31, 2018.
Business Environment and Outlook
Our industry is impactedIn March 2020, the World Health Organization declared a global pandemic related to the proliferation of COVID-19 (novel coronavirus). The ensuing economic turmoil caused by volatilitythe pandemic resulted in a significant reduction in global and uncertaintydomestic demand for crude oil due to, among other things, changes in commodity prices. Crudeconsumer behavior and restrictions implemented by governments to mitigate the pandemic. This demand destruction contributed to an unprecedented decline in crude oil prices, showed significant signs of improvement throughout the majority of 2018, with West Texas Intermediate benchmark prices reaching all-time lows in April 2020. In response to the significant reduction in crude oil benchmark prices, rising above $75we began voluntarily curtailing our production in April 2020 and ultimately curtailed approximately 55% of our operated crude oil production and associated natural gas in the 2020 second quarter. Additionally, in light of the challenges facing our business and industry, we implemented cost saving initiatives and significantly reduced our operated rig and completion crew counts in order to preserve our assets and better align our capital spending with expected available cash flows, resulting in a $1.5 billion, or 56%, decrease in our non-acquisition capital spending in 2020 compared to 2019. These actions, coupled with historically low crude oil prices, resulted in a material reduction in our production, revenues, and cash flows in 2020 compared to 2019.
Crude oil prices began to stabilize in mid-2020 and generally improved in the second half of 2020 in response to the gradual lifting of COVID-19 restrictions, the resumption of economic activity, and the resulting increase in crude oil demand. In July 2020 we began to gradually restore our curtailed production and subsequently brought our remaining curtailed production back online in September 2020. As a result of our resumed production, coupled with strategic well completion activities in late 2020, our total average production improved to 339,307 Boe per barrel in June and again in October before decreasing moreday for the 2020 fourth quarter, representing a 14% increase compared to the third quarter of 2020, yet still remaining 7% lower than 40% in the fourth quarter to an 18-month low of $44 per barrel at year-end 2018. Crude2019.
Despite the gradual improvement in crude oil prices have since rebounded from year-end 2018 lows, but remain volatile and unpredictable. Our leadership team has significant experience within the second half of 2020, we continued our commitment to operating in challenginga disciplined, capital efficient manner. Improved revenues from higher commodity prices coupled with our tempered spending resulted in the generation of cash flows in excess of operating and capital needs in the second half of 2020 that allowed for a $210 million net reduction in our total debt at December 31, 2020 compared to June 30, 2020. Additionally, despite production curtailments during the year, we continued to drive our per-unit production expenses lower to $3.27 per Boe for 2020 compared to $3.58 per Boe for 2019.
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We remain committed to the responsible stewardship of our assets and continue to focus on maximizing cash flows, further reducing debt, delivering low-cost capital efficient operations, and generating shareholder value. The depth and quality of our asset base, the commodity optionality provided by our significant amount of acreage held by production, and our financial strength allow us to be adaptable in a variety of price environments. With our portfolio of high quality assets,We remain flexible as we are well-positionedmonitor and adapt to manage the ongoing challenges and price volatility facing our industry.market conditions.
For 2019,2021, our primary business strategies will focus on:on generating shareholder value by:
Enhancing free cash flow generation and oil-weighted production growth;
Enhancing rates of return on capital employed through improvements in operating efficiencies, technical innovations, pad and row development, optimized completion methods, well productivity, and strategic mineral ownership;
Continuing to exercise disciplined capital spendingand operational discipline to maintain financial flexibility and ample liquidity; andmaximize cash flow generation;
Reducing outstanding debt using available operating cash flows, proceeds from asset dispositions, or joint development arrangements.debt;
Our capital expenditures budget for 2019 is $2.6 billion comparedCapitalizing on commodity optionality afforded to $2.8 billion spent in 2018, with the majority ofus by our 2019 drillingcrude oil and completion budget focusing on oil-weighted areas in North Dakota Bakkennatural gas assets; and SCOOP. Under the current commodity price environment, our planned capital expenditures for 2019 are expected to be funded entirely from operating cash flows. As we have done in the past, we may adjust our pace of drilling and development as 2019 market conditions evolve.
For 2019, we plan to operate an average of 25 drilling rigs and 9 completion crews for the year. We expect to spend approximately 41% of our 2019 capital expenditures budget on drilling and completion activities in the Bakken and 42% on drilling and completion activities in Oklahoma. The remaining 17% of our 2019 budget will target other capital expenditures


such as leasing and renewals, mineral acquisitions, work-overs, and facilities. See the section below titled Summary of Crude Oil and Natural Gas Properties and Projects for further discussion of our 2019 plans.Maintaining low-cost operations.
Our Business StrategyStrategies
Despite volatility and uncertainty in commodity prices, our business strategy continuesstrategies continue to be focused on increasinggenerating shareholder value by finding and developing crude oil and natural gas reserves at low costs that provideand attractive rates of return. The principal elements of this strategy include:
Growing and sustaining aour premier portfolio of assets focused on freein a disciplined manner to maximize cash flow generation and oil-weighted production growth.generation. We hold a portfolio of leasehold acreage, drilling opportunities, uncompleted wells, perpetually owned minerals, drilling opportunities, and uncompleted wellswater infrastructure assets in certain premier U.S. resource plays with varying access to crude oil, natural gas, and natural gas liquids. We pursue opportunities to develop our existing properties as well as explore for new resource plays where significant reserves may be economically developed. Our capital programs are designed to allocate investments to projects that provide the best opportunities to deliver strong oil-weighted production growth while generatinggenerate cash flows in excess of operating and capital requirements, to harvest our inventory of uncompleted wells, tocapitalize on movements in strip pricing between crude oil and natural gas, convert our undeveloped acreage to acreage held by production, harvest our inventory of uncompleted wells, and to improve hydrocarbon recoveries and rates of return on capital employed. WhileWe are strongly aligned with shareholders and our operations have historically focusedstrategic vision is predicated on our desire to generate shareholder value through various means.
Reducing outstanding debt. Maintaining a strong balance sheet, ample liquidity, and financial flexibility are key components of our business strategy. A cornerstone of our 2021 plan is to maximize cash flow generation to pay down debt. In 2021 and beyond we will continue our focus on paying down debt and preserving financial flexibility and ample liquidity as we manage the exploration and development ofrisks facing our industry.
Capitalizing on commodity optionality afforded to us by our crude oil we also allocate significant capital toand natural gas areasassets. We have a deep inventory of both oil and gas assets across the Bakken and Oklahoma that provide attractive rates of return.allow us to be responsive to, and benefit from, changes in oil and gas commodity price fundamentals. This commodity optionality provides an inherent advantage to Continental. Not only do we have the ability to shift capital between our Bakken and Oklahoma assets, but within Oklahoma we have the ability to shift capital between oil-weighted or gas-weighted projects depending on which commodity has a stronger price outlook. We also have direct access to multiple premium markets from our Oklahoma assets, which allow us to pursue either oil or gas markets as prices and fundamentals warrant. For 2021, we plan to remain flexible and responsive with our drilling and completion programs to capitalize on relative movements in oil and gas prices.
Enhance rates of return on capital employed through operating efficiencies, technical innovations, padMaintaining low-cost operations. Our culture is defined by our low cost operations and row development, optimized completions, well productivity, and strategic mineral ownership. in 2020 we again delivered low cost industry leadership despite the challenges facing our business. We continue to manage our business in the volatile commodity price environment by focusing on improving operating and capital efficiencies and managingreducing costs by exploiting technical innovations, pad and row development opportunities, and other means. Our key operating areas are characterized by large acreage positions in select unconventional resource plays with multiple stacked geologic formations that provide repeatable drilling opportunities and resource potential. We operate a significant portion of our wells and leasehold acreage and believe the concentration of our operated assets allows us to leverage our technical expertise and manage the development of our properties to enhance operating efficiencies and economies of scale.
Additionally, we capitalize on our geologic knowledge and land expertise to strategically acquire minerals in areas of future growth, thereby allowing Our operational excellence has allowed us to enhance cash flowsachieve and project economics through the alignment of mineral ownership with our drilling schedule. Our mineral ownership strategy serves as another avenue to enhance shareholder returns.maintain enviable low-cost operations.
Maintaining financial flexibility and a strong balance sheet. Maintaining a strong balance sheet, ample liquidity, and financial flexibility are key components of our business strategy. In 2018, we reduced our total debt by $585 million, or 9%, and had no outstanding borrowings on our credit facility at December 31, 2018. Additionally, we increased our cash on hand by $239 million during the year to $283 million at year-end 2018. We are actively targeting further debt reduction using available cash, operating cash flows, or proceeds from potential sales of non-strategic assets and joint development opportunities and will continue our focus on preserving financial flexibility and ample liquidity as we manage the risks facing our industry.
Focusing on organic growth through disciplined capital investments. Although we consider various growth opportunities, including property acquisitions, our primary focus is on organic growth through leasing and drilling in our core areas where we can exploit our extensive inventory of repeatable drilling opportunities to achieve attractive rates of return.
Our Business Strengths
We have a number of strengths we believe will helpto allow us to successfully execute our business strategy,strategies, including the following:
Large acreage inventory with access to both crude oil and natural gas resources. We held approximately 525,700359,300 net undeveloped acres and 1.221.23 million net developed acres under lease as of December 31, 20182020 concentrated in certain premier U.S. resource plays.plays that provide optionality and access to crude oil, natural gas, and natural gas liquids. We are among the largest leaseholders in the Bakken, SCOOP and STACK plays. Being an early entrant in these plays has allowed us to capture significant acreage positions in core parts of the plays.
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Expertise with pad and row development, horizontal drilling, and optimized completion methods. We have substantial experience with horizontal drilling and optimized completion methods and continue to be among industry leaders in the use of new drilling and completion technologies. We continue to improve drilling and completion efficiencies through the use of multi-well pad and row development strategies. Further, we are among industry leaders in drilling long lateral lengths. We have also been among industry leaders in testing and utilizing optimized completion technologies involving various combinations of fluid types, proppant types and volumes, and stimulation stage spacing to determine optimal methods for improving recoveries and rates of return. We continually refine our drilling and completion techniques in an effort to deliver improved results across our properties.


Control Operations Overoperations over a Substantial Portionsubstantial portion of Our Assetsour assets and Investmentsinvestments. As of December 31, 2018,2020, we operated properties comprising 85%88% of our total proved reserves. By controlling a significant portion of our operations, we are able to more effectively manage the cost and timing of exploration and development of our properties, including the drilling and completion methods used. Additionally, we capitalize on our geologic knowledge and land expertise to strategically acquire minerals in areas of future growth, thereby allowing us to enhance cash flows and project economics through the alignment of mineral ownership with our drilling schedule. Further, we continue to grow our significant portfolio of water gathering, recycling, and disposal infrastructure assets which allow for uninterrupted flow back and recycling capabilities, supports timely completion activities, and generates additional service revenues and cash flows. Our strategies for growing our mineral ownership portfolio and water infrastructure assets serve as additional avenues to generate shareholder value.
Experienced Management Team. Our senior management team has extensive expertise in the oil and gas industry and with operating in challenging commodity price environments. Our Chief Executive Officer,Chairman, Harold G. Hamm, began his career in the oil and gas industry in 1967. Our 98 executive officers have an average of 3941 years of oil and gas industry experience.
Financial Position and Liquidity. We have a credit facility with lender commitments totaling $1.5 billion that matures in April 2023. We had no outstanding borrowingsapproximately $1.33 billion of borrowing availability on theour credit facility at December 31, 20182020 after considering outstanding borrowings and continued to have no borrowings asletters of January 31, 2019.credit. Our credit facility is unsecured and does not have a borrowing base requirement that is subject to periodic redetermination based on changes in commodity prices and proved reserves. Additionally, downgrades or other negative rating actions with respect to our credit rating do not trigger a reduction in our current credit facility commitments, nor do such actions trigger a security requirement or change in covenants.



Crude Oil and Natural Gas Operations
Proved Reserves
Proved reserves are those quantities of crude oil and natural gas, which, by analysis of geoscience and engineering data, can be estimated with reasonable certainty to be economically producible from a given date forward, from known reservoirs, and under existing economic conditions, operating methods, and government regulations prior to the time at which contracts providing the right to operate expire, unless evidence indicates renewal is reasonably certain. In connection with the estimation of proved reserves, the term “reasonable certainty” implies a high degree of confidence that the quantities of crude oil and/or natural gas actually recovered will equal or exceed the estimate. To achieve reasonable certainty, our internal reserve engineers and Ryder Scott Company, L.P (“Ryder Scott”), our independent reserve engineers, employed technologies that have been demonstrated to yield results with consistency and repeatability. The technologies and economic data used in the estimation of our proved reserves include, but are not limited to, well logs, geologic maps including isopach and structure maps, analogy and statistical analysis, and available downhole, production, seismic, and well test data.
The table below sets forth estimated proved crude oil and natural gas reserves information by reserve category as of December 31, 2018.2020. Proved reserves attributable to noncontrolling interests are immaterialnot material relative to our consolidated reserves and are not separately presented herein. The standardized measure of our discounted future net cash flows totaled approximately $15.7$4.65 billion at December 31, 2018.2020. Our reserve estimates as of December 31, 20182020 are based primarily on a reserve report prepared by Ryder Scott. In preparing its report, Ryder Scott evaluated properties representing approximately 98%93% of our PV-10 and 98%95% of our total proved reserves as of December 31, 2018.2020. Our internal technical staff evaluated the remaining properties. A copy of Ryder Scott’s summary report is included as an exhibit to this Annual Report on Form 10-K.
Our estimated proved reserves and related future net revenues, Standardized Measure and PV-10 at December 31, 20182020 were determined using the 12-month unweighted arithmetic average of the first-day-of-the-month commodity prices for the period of January 20182020 through December 2018,2020, without giving effect to derivative transactions, and were held constant throughout the lives of the properties. These prices were $65.56$39.57 per Bbl for crude oil and $3.10$1.99 per MMBtu for natural gas ($61.2034.34 per Bbl for crude oil and $3.22$1.17 per Mcf for natural gas adjusted for location and quality differentials). These average prices are significantly lower than 2019 levels, which resulted in significant downward price-related revisions to proved reserves in 2020. Additionally, in 2020 we reduced the scope of our future drilling programs in response to the reduction in consumer demand and lower prices prompted by the COVID-19 pandemic, which resulted in the removal of PUD reserves no longer scheduled to
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  Crude Oil
(MBbls)
 Natural Gas
(MMcf)
 Total
(MBoe)
 PV-10 (1)
(in millions)
Proved developed producing 346,969
 1,955,727
 672,923
 $10,248.0
Proved developed non-producing 856
 8,562
 2,283
 23.8
Proved undeveloped 409,271
 2,627,325
 847,159
 8,378.5
Total proved reserves 757,096
 4,591,614
 1,522,365
 $18,650.3
Standardized Measure (1)       $15,684.8
be drilled within five years of initial booking. These revisions are further discussed below and contributed to significant decreases in our proved reserves, Standardized Measure, and PV-10 in 2020 compared to 2019.
The following table summarizes our estimated proved reserves by commodity and reserve classification as of December 31, 2020.
Crude Oil
(MBbls)
Natural Gas
(MMcf)
Total
(MBoe)
PV-10 (1)
(in millions)
Proved developed producing271,904 2,023,293 609,119 $3,962.5 
Proved developed non-producing10,002 49,718 18,288 110.8 
Proved undeveloped215,069 1,567,713 476,355 819.4 
Total proved reserves496,975 3,640,724 1,103,762 $4,892.7 
Standardized Measure (1)$4,653.6 
 
(1)
PV-10 is a non-GAAP financial measure and generally differs from Standardized Measure, the most directly comparable GAAP financial measure, because it does not include the effects of income taxes on future net revenues of approximately $3.0 billion. See Part II, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations—Non-GAAP Financial Measures for further discussion.

(1)PV-10 is a non-GAAP financial measure and generally differs from Standardized Measure, the most directly comparable GAAP financial measure, because it does not include the effects of income taxes on future net revenues of approximately $239 million. See Part II, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations—Non-GAAP Financial Measures for further discussion.

The following table provides additional information regarding our estimated proved crude oil and natural gas reserves by region as of December 31, 2018.2020.
 Proved DevelopedProved Undeveloped
 Crude Oil
(MBbls)
Natural Gas
(MMcf)
Total
(MBoe)
Crude Oil
(MBbls)
Natural Gas
(MMcf)
Total
(MBoe)
North Region:
Bakken field
North Dakota Bakken170,498 550,159 262,191 159,674 368,239 221,047 
Montana Bakken12,114 25,573 16,377 7,330 12,281 9,377 
Red River units
Cedar Hills17,670 — 17,670 — — — 
Other Red River units932 — 932 — — — 
South Region:
SCOOP69,955 1,073,955 248,947 46,263 1,097,920 229,249 
STACK10,732 423,320 81,285 1,802 89,273 16,682 
Other— — — 
Total281,906 2,073,011 627,407 215,069 1,567,713 476,355 
  Proved Developed Proved Undeveloped
  Crude Oil
(MBbls)
 Natural Gas
(MMcf)
 Total
(MBoe)
 Crude Oil
(MBbls)
 Natural Gas
(MMcf)
 Total
(MBoe)
North Region:            
Bakken field            
North Dakota Bakken 237,195
 588,212
 335,232
 300,126
 794,883
 432,606
Montana Bakken 20,523
 40,874
 27,336
 2,312
 3,119
 2,832
Red River units            
Cedar Hills 28,004
 4,606
 28,771
 
 
 
Other Red River units 3,659
 13
 3,661
 
 
 
Other 30
 7
 31
 
 
 
South Region:            
SCOOP 45,517
 785,293
 176,399
 89,978
 1,156,355
 282,705
STACK 11,932
 535,356
 101,158
 16,855
 672,968
 129,016
Other 965
 9,928
 2,618
 
 
 
Total 347,825
 1,964,289
 675,206
 409,271
 2,627,325
 847,159
The following table provides information regarding changes in total estimated proved reserves for the periods presented.
 Year Ended December 31,
MBoe202020192018
Proved reserves at beginning of year1,619,265 1,522,365 1,330,995 
Revisions of previous estimates(504,874)(148,848)(269,253)
Extensions, discoveries and other additions91,387 365,034 565,030 
Production(109,833)(124,244)(108,839)
Sales of minerals in place— (1,840)(8,011)
Purchases of minerals in place7,817 6,798 12,443 
Proved reserves at end of year1,103,762 1,619,265 1,522,365 
  Year Ended December 31,
MBoe 2018 2017 2016
Proved reserves at beginning of year 1,330,995
 1,274,864
 1,225,811
Revisions of previous estimates (269,253) (82,012) (110,474)
Extensions, discoveries and other additions 565,030
 240,206
 249,430
Production (108,839) (88,562) (79,390)
Sales of minerals in place (8,011) (15,197) (10,513)
Purchases of minerals in place 12,443
 1,696
 
Proved reserves at end of year 1,522,365
 1,330,995
 1,274,864
Revisions of previous estimates. Revisions for 20182020 are comprised of (i) the removal of 7450 MMBo and 960345 Bcf (totaling 234107 MMBoe) of PUD reserves no longer scheduled to be drilled within five years of initial booking due to a reduction in the continual refinementscope of our future drilling programs based on adverse market conditions, reduced demand, and reallocationlower prices caused by the COVID-19 pandemic and our resulting allocation of capital to areas providing the greatestbest opportunities to improve efficiencies,
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recoveries, and rates of return, (ii) downward revisions of 2129 MMBo and 216172 Bcf (totaling 5758 MMBoe) from the removal of PUD reserves due to changes in anticipated well densitieseconomics, performance, and other factors, (iii) upwarddownward price revisions of 21214 MMBo and 311,043 Bcf (totaling 26388 MMBoe) due to an increasethe significant decrease in average crude oil and natural gas prices in 20182020 compared to 2017,2019 resulting from the economic turmoil caused by the COVID-19 pandemic and other factors, and (iv) net downwardupward revisions of 243 MMBo and 1131 Bcf (totaling 448 MMBoe) due to changes in ownership interests, operating costs, anticipated production, performance, and other factors.
Extensions, discoveries and other additions. Extensions, discoveries and other additions for each of the three years reflected in the table above were due to successful drilling and completion activities and continual refinement of our drilling programs in the Bakken, SCOOP, and STACK plays. Proved reserve additions in the Bakken totaled 41 MMBoe, 160 MMBoe, and 251 MMBoe 148 MMBoe,for 2020, 2019, and 73 MMBoe for 2018, 2017, and 2016, respectively, while reserve additions in SCOOP totaled 49 MMBoe, 186 MMBoe, 53 MMBoe, and 97186 MMBoe for 2018, 2017,2020, 2019, and 2016,2018, respectively. Additionally, reserve additions in STACK totaled 1 MMBoe, 19 MMBoe, and 128 MMBoe 39 MMBoe,in 2020, 2019, and 79 MMBoe in 2018, 2017, and 2016, respectively. See the subsequent section titled Summary of Crude Oil and Natural Gas Properties and Projects for a discussion of our 20182020 drilling activities.
Sales of minerals in place. We had no individually significant dispositions of proved reserves in the past three years.
Purchases of minerals in place. We had no individually significant acquisitions of proved reserves in the past three years. The increase in acquired reserves in 2018 compared to prior years was due to higher mineral acquisition spending.


Proved Undeveloped Reserves
All of our PUD reserves at December 31, 20182020 are located in the Bakken, SCOOP, and STACK plays, our most active development areas, with those plays comprising 52%48%, 33%48%, and 15%4%, respectively, of our total PUD reserves at year-end 2018.2020. The following table provides information regarding changes in our PUD reserves for the year ended December 31, 2018.2020. Our PUD reserves at December 31, 20182020 include 8998 MMBoe of reserves associated with wells where drilling has occurred but the wells have not been completed or are completed but not producing ("DUC wells"). Our DUC wells are classified as PUD reserves when relatively major expenditures are required to complete and produce from the wells.
Crude Oil
(MBbls)
Natural Gas
(MMcf)
Total
(MBoe)
 Crude Oil
(MBbls)
 Natural Gas
(MMcf)
 Total
(MBoe)
Proved undeveloped reserves at December 31, 2017 322,242
 2,441,120
 729,094
Proved undeveloped reserves at December 31, 2019Proved undeveloped reserves at December 31, 2019423,782 2,928,354 911,841 
Revisions of previous estimates (95,168) (1,229,127) (300,022)Revisions of previous estimates(210,569)(1,326,177)(431,599)
Extensions and discoveries 222,122
 1,612,969
 490,950
Extensions and discoveries37,605 271,611 82,874 
Sales of minerals in place (1,963) (24,327) (6,017)Sales of minerals in place— — — 
Purchases of minerals in place 2,457
 33,563
 8,051
Purchases of minerals in place496 5,363 1,390 
Conversion to proved developed reserves (40,419) (206,873) (74,897)Conversion to proved developed reserves(36,245)(311,438)(88,151)
Proved undeveloped reserves at December 31, 2018 409,271
 2,627,325
 847,159
Proved undeveloped reserves at December 31, 2020Proved undeveloped reserves at December 31, 2020215,069 1,567,713 476,355 
Revisions of previous estimates. As previously discussed, in 20182020 we removed 7450 MMBo and 960345 Bcf (totaling 234107 MMBoe) of PUD reserves no longer scheduled to be drilled within five years of initial booking due to a reduction in the continual refinementscope of our future drilling programs.programs based on adverse market conditions, reduced demand, and lower prices caused by the COVID-19 pandemic. Of these removals, 5331 MMBo and 11190 Bcf (totaling 7246 MMBoe) was related to Bakken properties, 2018 MMBo and 734224 Bcf (totaling 14256 MMBoe) was related to SCOOP properties, and 1 MMBo and 11531 Bcf (totaling 20(5 MMBoe) was related to STACK properties. Additionally, aforementioned changes in anticipated well densitieseconomics, performance, and other factors resulted in downward PUD reserve revisions of 2129 MMBo and 216172 Bcf (totaling 5758 MMBoe) in 2018. Increases2020. The significant decreases in average crude oil and natural gas prices in 20182020 resulting from the COVID-19 pandemic and other factors resulted in upwarddownward price revisions of 3 MMBo.145 MMBo and 813 Bcf (totaling 280 MMBoe). Finally, changes in ownership interests, operating costs, anticipated production, performance, and other factors resulted in net downwardupward revisions for PUD reserve revisionsreserves of 313 MMBo and 536 Bcf (totaling 1214 MMBoe) in 2018.2020.
Extensions and discoveries. Extensions and discoveries were primarily due to successful drilling activities and continual refinement of our drilling programs in the Bakken SCOOP and STACKSCOOP plays. PUD reserve additions in the Bakken totaled 15927 MMBo and 41056 Bcf (totaling 22836 MMBoe) in 2018,2020, while SCOOP PUD reserve additions totaled 5311 MMBo and 662216 Bcf (totaling 16347 MMBoe)and STACK.
Sales of minerals in place. We had no individually significant dispositions of PUD reserve additions totaled 10 MMBo and 541 Bcf (totaling 100 MMBoe).reserves in 2020.
Purchases of minerals in place. AcquiredWe had no individually significant acquisitions of PUD reserves in 2018 primarily reflect mineral acquisitions during the year, none of which were individually significant.2020.
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Conversion to proved developed reserves. In 2018,2020, we developed approximately 19%12% of our PUD locations and 10% of our PUD reserves booked as of December 31, 20172019 through the drilling and completion of 330328 gross (122(149 net) development wells at an aggregate capital cost of $693approximately $439 million incurred in 2018. PUD conversions2020.
Our original capital budget for 2020 was $2.65 billion, which was reduced to $1.2 billion in the Bakken totaled 33 MMBo and 82 Bcf (totaling 47 MMBoe)March 2020 in 2018, while SCOOP PUD conversions totaled 6 MMBo and 36 Bcf (totaling 12 MMBoe) and STACK PUD conversions totaled 1 MMBo and 89 Bcf (totaling 16 MMBoe). These activities resulted in the conversion in 2018 of 15%, 4%, and 18%, respectively, of our Bakken, SCOOP, and STACK PUD reserves booked at year-end 2017.
In response to the significant improvementsudden, unprecedented decrease in crude oil prices in 2018,resulting from the COVID-19 pandemic and other factors. Due to economic uncertainty from the pandemic, we refinedsignificantly reduced our drilling programsand completion activities from previously planned levels in order to concentratepreserve financial flexibility and better align our efforts in areas and formations in Oklahoma and North Dakota offering the best opportunities to accelerate oil-weighted production growth. As part of this effort, we reallocated capital and rigs away from areas in the SCOOP and STACK plays having higher concentrations of natural gas to oil-weighted areas and formations.spending with expected available cash flows. These factors resulted in the deferral or removal of previously planned PUD development projects primarily in the SCOOP play, whichadversely impacted our conversion of PUD reserves to proved developed reserves in 2018.2020.
Development plans. We have acquired substantial leasehold positions in the Bakken, SCOOP and STACK plays. Our drilling programs to date in those areas have focused on proving our undeveloped leasehold acreage through strategic drilling, thereby increasing the amount of leasehold acreage in the secondary term of the lease with no further drilling obligations (i.e., categorized as held by production) and resulting in a reduced amount of leasehold acreage in the primary term of the lease. While we may opportunistically drill strategic exploratory wells, a substantial portion of our future capital expenditures will be focused on developing our PUD locations, including our drilled but not completed locations. Our inventory of DUC wells classified as PUDs total 348316 gross (141(121 net) operated and non-operated locations at December 31, 20182020 and represent


10% 20% of our PUD reserves at that date. The costs to drill our uncompleted wells were incurred prior to December 31, 20182020 and only the remaining completion costs are included in future development plans.
Estimated future development costs relating to the development of PUD reserves are projected to be approximately $2.5$732 million in 2021, $734 million in 2022, $889 million in 2023, $1.1 billion in 2019, $2.2 billion2024, and $448 million in 2020, $1.7 billion in 2021, $1.4 billion in 2022, and $1.4 billion in 2023.2025. These capital expenditure projections have been established based on an expectation of drilling and completion costs, available cash flows, borrowing capacity, and the commodity price environment in effect at the time of preparing our reserve estimates and may be adjusted as market conditions evolve. Development of our existing PUD reserves at December 31, 20182020 is expected to occur within five years of the date of initial booking of the PUDs. PUD reserves not expected to be drilled within five years of initial booking because of changes in business strategy or for other reasons have been removed from our reserves at December 31, 2018.2020. We had no PUD reserves at December 31, 20182020 that remain undeveloped beyond five years from the date of initial booking.
Qualifications of Technical Persons and Internal Controls Over Reserves Estimation Process
Ryder Scott, our independent reserves evaluation consulting firm, estimated, in accordance with generally accepted petroleum engineering and evaluation principles and definitions and guidelines established by the SEC, 98%93% of our PV-10 and 98%95% of our total proved reserves as of December 31, 20182020 included in this Form 10-K. The Ryder Scott technical personnel responsible for preparing the reserve estimates presented herein meet the requirements regarding qualifications, independence, objectivity and confidentiality set forth in the Standards Pertaining to the Estimating and Auditing of Oil and Gas Reserves Information promulgated by the Society of Petroleum Engineers. Refer to Exhibit 99 included with this Form 10-K for further discussion of the qualifications of Ryder Scott personnel.
We maintain an internal staff of petroleum engineers and geoscience professionals who work closely with our independent reserves engineers to ensure the integrity, accuracy and timeliness of data furnished to Ryder Scott in their reserves estimation process. Our technical team is in contact regularly with representatives of Ryder Scott to review properties and discuss methods and assumptions used in Ryder Scott’s preparation of the year-end reserves estimates. Proved reserves information is reviewed by our Audit Committee with representatives of Ryder Scott and by our internal technical staff before the information is filed with the SEC on Form 10-K. Additionally, certain members of our senior management review and approve the Ryder Scott reserves report and on a semi-annual basis review any internal proved reserves estimates.
Our Vice President—Corporate Reserves is the technical person primarily responsible for overseeing the preparation of our reserve estimates. He has a Bachelor of Science degree in Petroleum Engineering, an MBA in Finance and 3436 years of industry experience with positions of increasing responsibility in operations, acquisitions, engineering and evaluations. He has worked in the area of reserves and reservoir engineering most of his career and is a member of the Society of Petroleum Engineers. The Vice President—Corporate Reserves reports directly to our Vice Chairman of Strategic Growth Initiatives. The reserves estimates are reviewed and approved by certain members of the Company's President and certain other members of seniorexecutive management.
Proved Reserves, Standardized Measure, and PV-10 Sensitivities
Our year-end 20182020 proved reserves, Standardized Measure, and PV-10 estimates were prepared using 20182020 average first-day-of-the-month prices of $65.56$39.57 per Bbl for crude oil and $3.10$1.99 per MMBtu for natural gas ($61.2034.34 per Bbl for crude oil and $3.22$1.17 per Mcf for natural gas adjusted for location and quality differentials). Actual future prices may be materially higher or lower than those used in our year-end estimates.
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Provided below are sensitivities illustrating the potential impact on our estimated proved reserves, Standardized Measure, and PV-10 at December 31, 20182020 under different commodity price scenarios for crude oil and natural gas. In these sensitivities, all factors other than the commodity price assumption have been held constant for each well. These sensitivities demonstrate the impact that changing commodity prices may have on estimateddo not take into account a potential increase in our drilling activities and associated booking of additional proved reserves Standardized Measure, and PV-10that may occur at higher commodity prices and there is no assurance thesethe outcomes reflected below will be realized.


The crude oil price sensitivities provided below show the impact on proved reserves, Standardized Measure, and PV-10 under certain crude oil price scenarios, with natural gas prices being held constant at the 20182020 average first-day-of-the-month price of $3.10$1.99 per MMBtu.

clr-20201231_g2.jpg

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chart-a506cdca71be5327bdda01.jpg


The natural gas price sensitivities provided below show the impact on proved reserves, Standardized Measure, and PV-10 under certain natural gas price scenarios, with crude oil prices being held constant at the 20182020 average first-day-of-the-month price of $65.56$39.57 per Bbl.
chart-d9edf235845e5fa6823a01.jpg

clr-20201231_g3.jpg

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Developed and Undeveloped Acreage
The following table presents our total gross and net developed and undeveloped acres by region as of December 31, 2018:2020:
 Developed acresUndeveloped acresTotal
 GrossNetGrossNetGrossNet
North Region:
Bakken field
North Dakota Bakken949,852 563,260 105,095 61,248 1,054,947 624,508 
Montana Bakken170,412 136,153 33,795 25,789 204,207 161,942 
Red River units155,249 138,064 19,455 10,112 174,704 148,176 
Other80,326 54,095 29,569 25,725 109,895 79,820 
South Region:
SCOOP276,618 166,327 183,840 107,459 460,458 273,786 
STACK265,736 146,078 88,139 45,489 353,875 191,567 
Other34,247 20,790 28,940 12,364 63,187 33,154 
East Region734 670 77,547 71,159 78,281 71,829 
Total1,933,174 1,225,437 566,380 359,345 2,499,554 1,584,782 
  Developed acres Undeveloped acres Total
  Gross Net Gross Net Gross Net
North Region:            
Bakken field            
North Dakota Bakken 950,649
 558,662
 136,740
 85,817
 1,087,389
 644,479
Montana Bakken 171,663
 137,622
 17,866
 10,134
 189,529
 147,756
Red River units 158,077
 139,796
 20,462
 9,821
 178,539
 149,617
Other 88,615
 62,330
 70,095
 58,471
 158,710
 120,801
South Region:            
SCOOP 257,866
 152,607
 194,483
 103,027
 452,349
 255,634
STACK 254,539
 139,036
 153,320
 89,602
 407,859
 228,638
Other 61,744
 28,971
 70,748
 33,380
 132,492
 62,351
East Region 943
 848
 158,613
 135,490
 159,556
 136,338
Total 1,944,096
 1,219,872
 822,327
 525,742
 2,766,423
 1,745,614

The following table sets forth the number of gross and net undeveloped acres as of December 31, 20182020 scheduled to expire over the next three years by region unless production is established within the spacing units covering the acreage prior to the expiration dates or the leases are renewed.
 202120222023
 GrossNetGrossNetGrossNet
North Region:
Bakken field
North Dakota Bakken34,287 23,193 31,849 19,034 4,160 2,143 
Montana Bakken1,480 1,480 12,182 10,311 5,697 5,580 
Other— — — — 17,847 17,847 
South Region:
SCOOP36,475 16,265 35,631 22,773 26,068 12,927 
STACK31,465 19,241 11,541 7,696 4,259 3,114 
Other4,889 744 8,987 6,063 2,942 2,592 
East Region969 370 4,856 3,732 5,968 5,272 
Total109,565 61,293 105,046 69,609 66,941 49,475 
10
  2019 2020 2021
  Gross Net Gross Net Gross Net
North Region:            
Bakken field            
North Dakota Bakken 3,050
 1,669
 29,684
 20,401
 32,530
 23,205
Montana Bakken 400
 400
 
 
 1,480
 1,480
Red River units 3,119
 1,365
 
 
 
 
Other 20,417
 13,963
 3,755
 1,343
 17,217
 17,217
South Region:            
SCOOP 68,187
 33,901
 53,178
 29,820
 26,443
 12,797
STACK 60,317
 32,535
 49,944
 34,018
 18,837
 13,555
Other 28,115
 12,005
 24,094
 12,094
 1,164
 721
East Region 55,347
 40,336
 11,728
 10,164
 969
 370
Total 238,952
 136,174
 172,383
 107,840
 98,640
 69,345





Drilling Activity
During the three years ended December 31, 2018,2020, we drilledparticipated in the drilling and completedcompletion of exploratory and development wells as set forth in the table below:
below. As previously discussed, we significantly reduced our drilling and completion activities in 2020 in response to reduced crude oil prices, which resulted in a significant decrease in the number of wells completed during 2020 compared to prior years.
 2018 2017 2016 202020192018
 Gross Net Gross Net Gross Net GrossNetGrossNetGrossNet
Exploratory wells:            Exploratory wells:
Crude oil 4
 1.0
 34
 9.0
 39
 11.4
Crude oil— 1.6 1.0 
Natural gas 9
 4.6
 9
 3.1
 15
 4.2
Natural gas— 1.8 4.6 
Dry holes 
 
 
 
 
 
Dry holes0.9 — — — — 
Total exploratory wells 13
 5.6
 43
 12.1
 54
 15.6
Total exploratory wells0.9 3.4 13 5.6 
Development wells:            Development wells:
Crude oil 636
 213.7
 474
 175.4
 245
 54.7
Crude oil300 115.5 615 222.9 636 213.7 
Natural gas 151
 39.1
 91
 26.8
 66
 21.6
Natural gas31 15.9 68 9.7 151 39.1 
Dry holes 
 
 
 
 
 
Dry holes— — — — — — 
Total development wells 787
 252.8
 565
 202.2
 311
 76.3
Total development wells331 131.4 683 232.6 787 252.8 
Total wells 800
 258.4
 608
 214.3
 365
 91.9
Total wells334 132.3 689 236.0 800 258.4 
As of December 31, 2018,2020, there were 490459 gross (212(156 net) operated and non-operated wells that have been spud and are in the process of drilling, completing or waiting on completion.


Summary of Crude Oil and Natural Gas Properties and Projects
In the following discussion, we review our budgeted number of wells and capital expenditures for 20192021 in our key operating areas. Our 20192021 capital budget, has been set based on an expectationour current expectations of availablecommodity prices and costs, is expected to be funded from operating cash flows. Our drilling and completion activities and the actual amount and timing of our capital expenditures may differ materially from our budget as a result of, among other things, available cash flows, unbudgeted acquisitions, actual drilling and completion results, the availability of drilling and completion rigs and other services and equipment, the availability of transportation and processing capacity, changes in commodity prices, and regulatory, technological and competitive developments. We monitor our capital spending closely based on actual and projected cash flows and may scale back our spending should commodity prices decrease from current levels. Conversely, an increase in commodity prices from current levels could result in increased capital expenditures.
The following table provides information regarding well counts and budgeted capital expenditures for 2019.
2021.
  2019 Plan
  Gross wells (1) Net wells (1) Capital expenditures 
(in millions) (2)
  
Bakken 437
 148
 $1,063
Oklahoma 228
 109
 1,102
Total exploration and development 665
 257
 $2,165
Land (3)     205
Capital facilities, workovers and other corporate assets     228
Seismic     2
Total 2019 capital budget     $2,600
 2021 Plan
 Gross wells (1)Net wells (1)Capital expenditures 
(in millions) (2)
 
North Region229 94 $732 
South Region120 57 380 
Total exploration and development349 151 $1,112 
Land85 
Mineral acquisitions attributable to Continental (3)13 
Capital facilities, workovers, water infrastructure, and other186 
Seismic
2021 capital budget attributable to Continental$1,400 
Mineral acquisitions attributable to Franco-Nevada (3)52 
Total 2021 capital budget$1,452 
(1) Represents operated and non-operated wells expected to have first production in 2019.2021.
11


(2) Represents total capital expenditures for operated and non-operated wells expected to have first production in 20192021 and wells spud that will be in the process of drilling, completing or waiting on completion as of year-end 2019.
(3)
Includes $125 million of planned spending for mineral acquisitions under our new relationship with Franco-Nevada Corporation described in Part II, Item 8. Notes to Consolidated Financial Statements—Note 15. Noncontrolling Interests. With a carry structure in place, Continental will recoup $100 million, or 80%, of such acquisition spending from Franco-Nevada.

2021. Amounts exclude our pending acquisition of properties in the Powder River Basin of Wyoming for $215 million as discussed in Part II, Item 8. Notes to Consolidated Financial Statements—Note 12. Commitments and Contingencies.

(3)    Represents planned spending for mineral acquisitions by The Mineral Resources Company II, LLC ("TMRC II") under our relationship with Franco-Nevada Corporation described in Part II, Item 8. Notes to Consolidated Financial Statements—Note 16. Noncontrolling Interests. Continental holds a controlling financial interest in TMRC II and therefore consolidates the financial results and capital expenditures of the entity. With a carry structure in place, Continental will fund 20% of 2021 planned spending, or $13 million, and Franco-Nevada will fund the remaining 80%, or $52 million.
North Region
Our properties in the North region represented 55%48% of our total proved reserves as of December 31, 20182020 and 60%56% of our average daily Boe production for the fourth quarter of 2018.2020. Our principal producing properties in the North region are located in the Bakken field.
Bakken Field
The Bakken field of North Dakota and Montana is one of the largest crude oil resource plays in the United States. We are a leading producer, leasehold owner and operator in the Bakken. As of December 31, 2018,2020, we controlled one of the largest leasehold positions in the Bakken with approximately 1.3 million gross (792,200(786,500 net) acres under lease.
Our total Bakken production averaged 183,836183,141 Boe per day for the fourth quarter of 2018, up 11%2020, down 6% from the 20172019 fourth quarter. For the year ended December 31, 2018,2020, our average daily Bakken production increased 26% over 2017. We increaseddecreased 19% compared to 2019, reflecting our reduction in drilling and well completion activities inand the Bakken in 2018 in response to improved crude oil prices.impact of voluntary production curtailments during the year. In 2018,2020, we participated in the drilling and completion of 496188 gross (169(77 net) wells in the Bakken compared to 370379 gross (145(124 net) wells in 2017.2019. Our 20182020 activities in the Bakken focused on ongoing multi-zone unit development of high rate-of-return areas in core partsareas of the play.
Our Bakken properties represented 52%46% of our total proved reserves at December 31, 20182020 and 57%54% of our average daily Boe production for the 20182020 fourth quarter. Our total proved Bakken field reserves as of December 31, 20182020 were 798509 MMBoe, an increasea decrease of 26%39% compared to December 31, 20172019 primarily due to reserves added from ourdownward reserve revisions prompted by significantly reduced commodity prices and resulting changes in drilling program and continued improvement in recoveries driven by advances in optimized completion designs.plans. Our inventory of proved undeveloped drilling locations in the Bakken totaled 1,629849 gross (930(404 net) wells as of December 31, 2018.2020.
In 2019, we plan to invest approximately $1.06 billionFor 2021, our budget for exploration and development capital expenditures in the Bakken playNorth region is $732 million. In 2021, we expect to drill, complete and initiatehave first production on 437229 gross (148(94 net) operated and non-operated wells.wells in the North region. We plan to average approximately sixseven operated rigs and fourthree well completion crews in the Bakken throughout 2019.North region in 2021. Our 20192021 drilling and completion activities in the Bakken will continue to focus on core parts of the Bakkenmulti-zone unit development in areas that provide opportunities to improve capital efficiency, reduce finding and development costs, grow our oil-weighted production, and improve recoveries and rates of return.return, and maximize cash flows.
South Region
Our properties in the South region represented 45%52% of our total proved reserves as of December 31, 20182020 and 40%44% of our average daily Boe production for the fourth quarter of 2018.2020. Our principal producing properties in the South region are located in the SCOOP and STACK areas of Oklahoma.
SCOOP
The SCOOP play extends across Garvin, Grady, Stephens, Carter, McClain and Love counties in Oklahoma and contains crude oil and condensate-rich fairways as delineated by numerous industry wells. We are a leading producer, leasehold owner and operator in the SCOOP play. As of December 31, 2018,2020, we controlled one of the largest leasehold positions in SCOOP with approximately 452,300460,500 gross (255,600(273,800 net) acres under lease.
Our SCOOP leasehold has the potential to contain hydrocarbons from a variety of conventional and unconventional reservoirs overlying and underlying the Woodford formation in Oklahoma. In recent years, our drilling activities have resulted in the vertical expansion of our SCOOP Woodford position with discoveries of the SCOOP Springer and Sycamore formations, which are located directly above the Woodford formation. Our Springer and Sycamore positions supplement our Woodford leasehold and expand our resource potential and inventory in the play. 
12


SCOOP represented 30%43% of our total proved reserves as of December 31, 20182020 and 21%32% of our average daily Boe production for the fourth quarter of 2018.2020. Production in SCOOP averaged 67,244107,060 Boe per day during the fourth quarter of 2018, up 8%2020, down 4% compared to the 20172019 fourth quarter. For the year ended December 31, 2018,2020, average daily production in SCOOP increased 6%16% compared to 2017,2019, reflecting increasedadditional drilling and completion activities in 2018.our Project SpringBoard which exceeded the impact of production curtailments in the play during the year. We participated in the drilling and completion of 148123 gross (48(46 net) wells in SCOOP during 20182020 compared to 77207 gross (20(93 net) wells in 2017. Proved2019. Our total proved SCOOP field reserves in SCOOP totaled 459 MMBoe as of December 31, 2018,2020 were 478 MMBoe, a decrease of 7%17% compared to December 31, 20172019 primarily due to the aforementioned removal of PUD reserves no longer scheduled to be drilled within five years of initial booking partially offsetdownward reserve revisions prompted by new reserve extensionssignificantly reduced commodity prices and discoveries.resulting changes in drilling plans. Our inventory of proved undeveloped drilling locations in SCOOP totaled 471262 gross (248(164 net) wells as of December 31, 2018.
Our 2018 activities in SCOOP were focused on a new development project in the play named Project SpringBoard. SpringBoard is a massive, multi-year, crude oil project controlled and operated by Continental that covers approximately 73 square miles of contiguous leasehold in Grady County, Oklahoma where we are concurrently developing three stacked reservoirs in the Springer, Sycamore, and Woodford formations. These reservoirs are being developed in rows to maximize


efficiencies and rates of return through the orderly sequencing of drilling and completion activities. This row development strategy allows us to realize significant cost savings. In addition to cost saving benefits, our SpringBoard production benefits from access to premium sales markets through existing pipeline infrastructure, making our SpringBoard sales price realizations among the best in the Company. Additionally, water pipeline and recycling facilities are in place to allow for uninterrupted flow back and recycling capabilities to support timely completion activities in the project. Project SpringBoard marks the beginning of full scale development of our SCOOP oil assets, following years of leasing, exploration, and delineation drilling, and is expected to have a meaningful impact on the Company's oil-weighted production growth in 2019.2020.
STACK
The STACK play is a significant resource play located in the Anadarko Basin of Oklahoma and is characterized by stacked geologic formations with major targets in the Meramec, Osage, and Woodford formations. As of December 31, 2018,2020, we controlled one of the largest leasehold positions in STACK with approximately 407,900353,900 gross (228,600(191,600 net) acres under lease. A significant portion of our STACK acreage is located in over-pressured portions of Blaine, Dewey and Custer counties of Oklahoma where we believe the reservoirs are typically thicker and deliver superior production rates relative to normal-pressured areas of the STACK petroleum system.
Our STACK properties represented 15%9% of our total proved reserves as of December 31, 20182020 and 19%12% of our average daily Boe production for the fourth quarter of 2018.2020. Production in STACK increased to an average rate of 62,947averaged 42,281 Boe per day during the fourth quarter of 2018, up 31% over2020, down 18% from the 20172019 fourth quarter due to additional wells being completed and producing.quarter. For the year ended December 31, 2018,2020, average daily production in STACK grew 55% over 2017.decreased 30% compared to 2019, reflecting our reduction in drilling and completion activities and the impact of voluntary production curtailments during the year. We participated in the drilling and completion of 15422 gross (40(8 net) wells in STACK during 20182020 compared to 160103 gross (49(19 net) wells in 2017. Our 2018 activities were focused on accelerating the development of our oil and liquids-rich assets in the play. Highlighting our 2018 activity in the play was the completion of three units (Jalou, Homsey, Simba) targeting the Meramec formation in the over-pressured oil and condensate windows of STACK. These three units produced outstanding results that confirmed our unit development model and the economic producibility of the reservoirs in the play.
2019. Proved reserves in STACK increased 38%decreased 46% year-over-year to 23098 MMBoe as of December 31, 20182020 primarily due to reserves added from ourdownward reserve revisions prompted by significantly reduced commodity prices and resulting changes in drilling program and continued improvement in recoveries driven by advances in optimized completion designs. plans. Our inventory of proved undeveloped drilling locations in STACK totaled 26225 gross (84(9 net) wells as of December 31, 2018.2020.
For 2021, our aggregate budget for exploration and development capital expenditures in the South region is $380 million. In Oklahoma, for 20192021, we planexpect to invest an aggregate of approximately $1.10 billion to drill, complete and initiatehave first production on 228120 gross (109(57 net) operated and non-operated wells in the SCOOP and STACK areas combined.South region. We plan to average approximately 19four operated rigs with 12 rigs focused on Project SpringBoard, and fivetwo well completion crews in Oklahoma throughout 2019.the South region in 2021. Our 20192021 activities in SCOOP will focus on continued row development in Project SpringBoard and achieving operational and technical advancements aimed at further improving capital efficiencies, oil-weighted production growth, and rates of return. Our 2019 activities in STACK will focus on continued development of oil and liquids-rich assets in the over-pressured windows of theSCOOP play and improvingongoing development in areas that provide opportunities to improve capital efficiencies,efficiency, reduce finding and development costs, improve recoveries and rates of return.

return, and maximize cash flows.

13


Production and Price History
The following table sets forth information concerning our production results, average sales prices and production costs for the years ended December 31, 2018, 20172020, 2019 and 20162018 in total and for each field containing 15 percent or more of our total proved reserves as of December 31, 2018.2020.  
 Year ended December 31,
 202020192018
Net production volumes:
Crude oil (MBbls)
North Dakota Bakken40,052 52,420 45,775 
SCOOP12,585 11,679 6,918 
Total Company58,745 72,267 61,384 
Natural gas (MMcf)
North Dakota Bakken97,532 98,186 78,448 
SCOOP136,410 111,436 99,397 
Total Company306,528 311,865 284,730 
Crude oil equivalents (MBoe)
North Dakota Bakken56,308 68,784 58,849 
SCOOP35,320 30,252 23,484 
Total Company109,833 124,244 108,839 
Average net sales prices (1):
Crude oil ($/Bbl)
North Dakota Bakken$33.53 $50.96 $58.37 
SCOOP37.88 54.92 62.74 
Total Company34.71 51.82 59.19 
Natural gas ($/Mcf)
North Dakota Bakken$0.23 $1.28 $3.33 
SCOOP1.64 2.36 3.41 
Total Company1.04 1.77 3.01 
Crude oil equivalents ($/Boe)
North Dakota Bakken$24.24 $40.66 $49.83 
SCOOP19.90 29.80 32.88 
Total Company21.47 34.56 41.25 
Average costs per Boe:
Production expenses ($/Boe)
North Dakota Bakken$4.35 $4.28 $4.40 
SCOOP1.06 1.21 1.34 
Total Company3.27 3.58 3.59 
Production taxes ($/Boe)$1.75 $2.88 $3.25 
General and administrative expenses ($/Boe)$1.79 $1.57 $1.69 
DD&A expense ($/Boe)$17.12 $16.25 $17.09 
(1)     See Part II, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations—Non-GAAP Financial Measures for a discussion and calculation of net sales prices, which are non-GAAP measures.
14


  Year ended December 31,
  2018 2017 2016
Net production volumes:      
Crude oil (MBbls)      
North Dakota Bakken 45,775
 35,964
 31,723
SCOOP 6,918
 5,726
 6,807
STACK 3,582
 3,166
 1,552
Total Company 61,384
 50,536
 46,850
Natural gas (MMcf)      
North Dakota Bakken 78,448
 59,232
 50,532
SCOOP 99,397
 98,563
 102,032
STACK 101,267
 60,325
 27,983
Total Company 284,730
 228,159
 195,240
Crude oil equivalents (MBoe)      
North Dakota Bakken 58,849
 45,836
 40,145
SCOOP 23,484
 22,153
 23,813
STACK 20,460
 13,220
 6,216
Total Company 108,839
 88,562
 79,390
Average net sales prices (1):      
Crude oil ($/Bbl)      
North Dakota Bakken $58.37
 $45.21
 $34.33
SCOOP 62.74
 47.96
 38.87
STACK 61.97
 49.68
 41.95
Total Company 59.19
 45.70
 35.51
Natural gas ($/Mcf)      
North Dakota Bakken $3.33
 $2.97
 $1.05
SCOOP 3.41
 3.26
 2.24
STACK 2.38
 2.43
 1.87
Total Company 3.01
 2.93
 1.87
Crude oil equivalents ($/Boe)      
North Dakota Bakken $49.83
 $39.32
 $28.45
SCOOP 32.88
 26.93
 20.71
STACK 22.68
 22.89
 18.88
Total Company 41.25
 33.65
 25.55
Average costs per Boe:      
Production expenses ($/Boe)      
North Dakota Bakken $4.40
 $4.40
 $4.59
SCOOP 1.34
 1.01
 1.13
STACK 1.21
 1.22
 1.00
Total Company 3.59
 3.66
 3.65
Production taxes ($/Boe) $3.25
 $2.35
 $1.79
General and administrative expenses ($/Boe) $1.69
 $2.16
 $2.14
DD&A expense ($/Boe) $17.09
 $18.89
 $21.54


(1)
See Part II, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations—Non-GAAP Financial Measures for a discussion and calculation of net sales prices, which are non-GAAP measures for 2018.
The following table sets forth information regarding our average daily production by region for the fourth quarter of 2018:2020:
 Fourth Quarter 2020 Daily Production
 Crude Oil
(Bbls per day)
Natural Gas
(Mcf per day)
Total
(Boe per day)
North Region:
Bakken field
North Dakota Bakken122,291 333,070 177,802 
Montana Bakken4,137 7,209 5,339 
Red River units
Cedar Hills5,323 — 5,323 
Other Red River units1,464 17 1,467 
South Region:
SCOOP36,415 423,871 107,060 
STACK6,995 211,715 42,281 
Other14 129 35 
Total176,639 976,011 339,307 
  Fourth Quarter 2018 Daily Production
  Crude Oil
(Bbls per day)
 Natural Gas
(Mcf per day)
 Total
(Boe per day)
North Region:      
Bakken field      
North Dakota Bakken 139,338
 228,124
 177,358
Montana Bakken 4,998
 8,881
 6,478
Red River units      
Cedar Hills 6,389
 1,255
 6,598
Other Red River units 2,048
 2,385
 2,446
Other 33
 
 33
South Region:      
SCOOP 21,332
 275,471
 67,244
STACK 12,402
 303,272
 62,947
Other 394
 3,014
 897
Total 186,934
 822,402
 324,001
Productive Wells
Gross wells represent the number of wells in which we own a working interest and net wells represent the total of our fractional working interests owned in gross wells. The following table presents the total gross and net productive wells by region and by crude oil or natural gas completion as of December 31, 2018.2020.One or more completions in the same well bore are counted as one well.
 Crude Oil WellsNatural Gas WellsTotal Wells
 Gross    Net    Gross    Net    Gross    Net    
North Region:
Bakken field
North Dakota Bakken4,708 1,631 — — 4,708 1,631 
Montana Bakken394 254 — — 394 254 
Red River units
Cedar Hills136 130 — — 136 130 
Other Red River units130 116 — — 130 116 
South Region:
SCOOP620 316 488 147 1,108 463 
STACK416 157 436 142 852 299 
Other22 23 
Total6,405 2,605 946 290 7,351 2,895 
15
  Crude Oil Wells Natural Gas Wells Total Wells
  Gross     Net     Gross     Net     Gross     Net    
North Region:            
Bakken field            
North Dakota Bakken 4,506
 1,446
 
 
 4,506
 1,446
Montana Bakken 401
 263
 
 
 401
 263
Red River units           

Cedar Hills 135
 129
 
 
 135
 129
Other Red River units 128
 114
 
 
 128
 114
Other 2
 2
 
 
 2
 2
South Region:           
SCOOP 335
 184
 438
 126
 773
 310
STACK 257
 82
 353
 123
 610
 205
Other 101
 80
 126
 40
 227
 120
Total 5,865
 2,300
 917
 289
 6,782
 2,589




Title to Properties
As is customary in the crude oil and natural gas industry, upon initiation of acquiring oil and gas leases covering fee mineral interests on undeveloped lands which do not have associated proved reserves, contract landmen conduct a title examination of courthouse records and production databases to determine fee mineral ownership and availability. Title, lease forms and terms are reviewed and approved by Company landmen prior to consummation.
For acquisitions from third parties, whether lands are producing crude oil and natural gas or non-producing, Company and contract landmen perform title examinations at applicable courthouses, obtain physical well site inspections, and examine the seller’s internal records (land, legal, operational, production, environmental, well, marketing and accounting) upon execution of a mutually acceptable purchase and sale agreement. Company landmen may also procure an acquisition title opinion from outside legal counsel on higher value properties.
Prior to the commencement of drilling operations, Company landmen procure an original title opinion, or supplement an existing title opinion, from outside legal counsel and perform curative work to satisfy requirements pertaining to material title defects, if any. Company landmen will not approve commencement of drilling operations until material title defects pertaining to the Company’s interest are cured.
The Company has cured material title opinion defects as to Company interests on substantially all of its producing properties and believes it holds at least defensible title to its producing properties in accordance with standards generally accepted in the crude oil and natural gas industry. The Company’s crude oil and natural gas properties are subject to customary royalty and leasehold burdens which do not materially interfere with the Company’s interest in the properties or affect the Company’s carrying value of such properties.
Marketing and Major Customers
We sell most of our operated crude oil production to crude oil refining companies or midstream marketing companies at major market centers. In the Bakken, SCOOP, and STACK areas we have significant volumes of production directly connected to pipeline gathering systems, with the remaining balance of production being primarily transported by truck either directly to a refinery or to a point on a pipeline system for further delivery. We do not transport any of our oil production prior to sale by rail, but several purchasers of our Bakken production are connected to rail delivery systems and may choose those methods to transport the oil they purchase from us. We sell some operated crude oil production at the lease. Our share of crude oil production from non-operated properties is marketed at the discretion of the operators.
We sell our operated natural gas production to midstream customers at our lease locations based on market prices in the field where the sales occur. These contracts include multi-year term agreements, many with acreage dedication.dedications. Under certain arrangements, we have the right to take a volume of processed residue gas and/or natural gas liquids ("NGLs") in-kind at the tailgate of the midstream customer's processing plant in lieu of a monetary settlement for the sale of our operated natural gas production. We currently take certain processed residue gas volumes in kind in lieu of monetary settlement, but we do not currently take NGL volumes. When we do take volumes in kind, we pay third parties to transport the residue gas volumes taken in kind to downstream delivery points, where we then sell to customers at prices applicable to those downstream markets. Sales at the downstream markets are mostly under daily and monthly interruptible packaged volumevolumes deals, shortshorter term seasonal packages, and long term multi-year contracts. We continue to develop relationships and have the potential to enter into additional contracts with end-use customers, including utilities, industrial users, and liquefied natural gas exporters, for sale of products we elect to take in-kind in lieu of monetary settlement for our leasehold sales. Our share of natural gas production from non-operated properties is generally marketed at the discretion of the operators.
For the year ended December 31, 2018, sales to Valero Energy Corporation and its affiliates accounted for approximately 12% of our total crude oil and natural gas revenues. No other purchaser accounted for more than 10% of our total crude oil and natural gas revenues for 2018. The loss of any single purchaser will not have a material adverse effect on our operations, as crude oil and natural gas are fungible products with well-established markets and numerous purchasers in various regions.
Competition
We operate in a highly competitive environment for acquiring properties, marketing crude oil and natural gas, and securing trained personnel. Also, there is substantial competition for capital available for investment in the crude oil and natural gas industry. Our competitors vary within the regions in which we operate, and some of our competitors may possess and employ financial, technical and personnel resources greater than ours, which can be particularly important in the areas in which we operate.ours. Those companies may be able to pay more for productive crude oil and natural gas properties, minerals, and exploratory prospects and to evaluate, bid for and purchase a greater number of properties and prospects than our financial or personnel resources permit. Our ability to acquire additional prospects and to find and develop reserves in the future will depend on our ability to evaluate and select suitable properties and to consummate transactions economically in a highly competitive


environment. In addition, as a result of the significant decrease indepressed commodity prices in recent years, the number of providers of materials and services has decreased in the regions where we operate. As a result, the likelihood of experiencing competition and shortages of materials and services may be further increased in connection with any period of sustained commodity price recovery. Finally, the emerging impact of climate change activism, fuel conservation measures, governmental requirements for renewable energy resources, increasing demand for alternative forms of energy, and
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technological advances in energy generation devices may result in reduced demand for the crude oil and natural gas we produce.
Regulation of the Crude Oil and Natural Gas Industry
OurAll of our operations are conducted onshore almost entirely in the United States. The crude oil and natural gas industry in the United States is subject to various types of regulation at the federal, state and local levels. Laws, rules, regulations, policies, and interpretations affecting our industry have been and are pervasive with the frequent imposition of new or increased requirements on us and other industry participants.requirements. These laws, regulations and other requirements often carry substantial penalties for failure to comply and may have a significant effect on our operations and may increase the cost of doing business and reduce our profitability. In addition, because public policy changes affecting the crude oil and natural gas industry are commonplace and because laws, rules and regulations may be enacted, amended or reinterpreted, we are unable to predict the future cost or impact of complying with such laws, rules and regulations. We do not expect future legislative or regulatory initiatives will affect us materially different than they wouldwill affect our similarly situated competitors.
The following is a discussion of certain significant laws, rules and regulations, as amended from time to time, that may affect us in the areas in which we operate.
Regulation of sales and transportation of crude oil and natural gas liquids
Our physical sales of crude oil and any derivative instruments relating to crude oil are subject to anti-market manipulation laws and related regulations enforced by the Federal Trade Commission (“FTC”) and the Commodity Futures Trading Commission (“CFTC”) that,. These laws, among other things, prohibit fraudulent or deceptive conduct in connection with wholesale purchases or sales of crude oil and price manipulation in the commodity and futures markets. If we violate the anti-market manipulation laws and regulations, we couldcan be subject to substantial penalties and related third-party damage claims by, among others, sellers, royalty owners and taxing authorities.
We transport most of our operated crude oil production to market centers using a combination of trucks and pipeline transportation facilities owned and operated by third parties. The U.S. Department of Transportation’s Pipeline and Hazardous Materials Safety Administration establishes safety regulations relating to transportation of crude oil by pipeline. Further, our sales of crude oil are affected by the availability, terms and costs of transportation. The transportation of crude oil and natural gas liquids ("NGLs") is subject to rate and access regulation. The Federal Energy Regulatory Commission (“FERC”) regulates interstate crude oil and NGL pipeline transportation rates under the Interstate Commerce Act and the Energy Policy Act of 1992. In general, pipeline rates must be just1992, and reasonable and must not be unduly discriminatory or confer any undue preference upon any shipper. Intrastateintrastate crude oil and NGL pipeline transportation rates may be subject to regulation by state regulatory commissions. The basis for intrastate pipeline regulation, and the degree of regulatory oversight and scrutiny given to intrastate crude oil pipeline rates, varies from state to state. As the interstate and intrastate transportation rates we pay are generally applicable to all comparable shippers, the regulation of such transportation rates will not affect us in a way that materially differs from the effect on our similarly situated competitors.
Further, interstate pipelines and intrastate common carrier pipelines must provide service on an equitable basis and offer service to all similarly situated shippers requesting service on the same terms and under the same rates. When such pipelines operate at full capacity we are subject to proration provisions, which are described in the pipelines’ published tariffs. We generally will have access to crude oil pipeline transportation services to the same extent as our similarly situated competitors.
Beginning in the 1970s, the United States regulated the exportation of petroleum and petroleum products, which restricted the markets for these commodities and affected sales prices. However, in December 2015 the U.S. Congress passed legislation eliminating the ban on crude oil exports beginning in January 2016. From time to time we may sell our operated crude oil production at market centers in the United States to third parties who then subsequently export and sell the crude oil in international markets. The International Maritime Organization ("IMO"), an agency of the United Nations, has issued regulations requiring the maritime shipping industry to gradually reduce its carbon emissions over time by mandating a 1% improvement in the efficiency of fleets each year between 2015 and 2025. In conjunction with this initiative, the IMO has issued regulations requiring ship owners to lower the concentration of the sulfur content used in their fuels from 3.5% to 0.5% beginning inon January 1, 2020. To achieve this goal,and maintain compliance with the new regulations, it is expected ship owners will either have to switch to more expensive higher quality marine fuel, invest ininstall and utilize emissions-cleaning systems, or switch to alternative fuels such as liquefied natural gas. Third party complianceFailure to comply with the IMO's shipping regulations may result in fines or shipping vessels being detained, thereby resulting in exportation capacity constraints during the period in which tanker fleets are retrofitted to meet specifications, thereby inhibitingthat inhibit a third party's ability to transport and sell ourdomestic crude oil production overseas, which may have a material impact on the markets and prices for various grades of domestic and international crude oil.


The ultimate long-term impact of the IMO regulations is uncertain.
We do not own or operate pipeline or rail transportation facilities, rail cars, or infrastructure used to facilitate the exportation of crude oil. However, regulations that impact the domestic transportation of crude oil could increase our costs of doing business
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and limit our ability to transport and sell our crude oil at market centers throughout the United States. We do not expect such regulations will affect us in a materially different way than similarly situated competitors.
Regulation of sales and transportation of natural gas
We are also required to observe the aforementioned anti-market manipulation laws and related regulations enforced by the FERC and CFTC in connection with physical sales of natural gas and any derivative instruments relating to natural gas. Additionally, the FERC regulates interstate natural gas transportation rates and service conditions under the Natural Gas Act and the Natural Gas Policy Act of 1978, which affects the marketing of natural gas we produce, as well as revenues we receive for sales of our natural gas. The FERC has endeavored to increase competition and make natural gas transportation more accessible to natural gas buyers and sellers on an open and non-discriminatory basis and has issued a series of orders to implement its open access policies. We cannot provide any assurance the pro-competitive regulatory approach established by the FERC will continue. However, we do not believe any action taken by the FERC will affect us in a materially different way than similarly situated natural gas producers.
The gathering of natural gas, which occurs upstream of jurisdictional transmission services, is generally regulated by the states. Although its policies on gathering systems have varied in the past, the FERC has reclassified certain jurisdictional transmission facilities as non-jurisdictional gathering facilities, which has the potential to increase costs for our purchasers and reduce the revenues we receive for our natural gas stream. State regulation of natural gas gathering facilities generally includes various safety, environmental, and in some circumstances, equitable take requirements. We do not believe such regulations will affect us in a materially different way than our similarly situated competitors.
Intrastate natural gas transportation service is also subject to regulation by state regulatory agencies. Like the regulation of interstate transportation rates, the regulation of intrastate transportation rates affects the marketing of natural gas we produce, as well as the revenues we receive for sales of our natural gas. The basis for intrastate regulation of natural gas transportation and the degree of regulatory oversight and scrutiny given to intrastate natural gas pipeline rates and services varies from state to state. Insofar as such regulation within a particular state will generally affect all intrastate natural gas shippers on a comparable basis, the regulation of intrastate natural gas transportation in states in which we operate will not affect us in a way that materially differs from our similarly situated competitors.
The U.S. Department of Energy (“U.S. DOE”) regulates the terms and conditions for the exportation and importation of natural gas (including liquefied natural gas or “LNG”). U.S. law provides for very limited regulation of exports to and imports from any country that has entered into a Free Trade Agreement (“FTA”) with the United States providing for national treatment of trade in natural gas; however, the U.S. DOE’s regulation of imports and exports from and to countries without an FTA is more comprehensive. The FERC also regulates the construction and operation of import and export facilities, including LNG terminals. Regulation of imports and exports and related facilities may materially affect natural gas markets and sales prices and could inhibit the development of LNG infrastructure.
Regulation of production
The production of crude oil and natural gas is regulated by a wide range of federal, state, and local laws, rules, orders and regulations, which require, among other matters, permits for drilling operations, drilling bonds, and reports concerning operations. Each of the states where we own and operate properties have laws and regulations governing conservation, including provisions for the unitization or pooling of crude oil and natural gas properties, the establishment of maximum allowable rates of production from crude oil and natural gas wells, the regulation of well spacing, the plugging and abandonment of wells, the regulation of greenhouse gas emissions, and limitations or prohibitions on the venting or flaring of natural gas. These laws and regulations directly and indirectly limit the amount of crude oil and natural gas we can produce from our wells and the number of wells and locations we can drill, although we can and do apply for exceptions to such laws and regulations or to have reductions in well spacing. Moreover, each state generally imposes a production, severance or excise tax on the production and sale of crude oil, natural gas and natural gas liquids within its jurisdiction.
The failure to comply with the above laws, rules, and regulations can result in substantial penalties. Our similarly situated competitors are generally subject to the same laws, rules, and regulations as we are.
Environmental regulation
General.General. We are subject to stringent and complex federal, state, and local laws, rules and regulations governing environmental compliance, including the discharge of materials into the environment. These laws, rules and regulations may, among other things:


require the acquisition of various permits to conduct exploration, drilling and production operations;
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restrict the types, quantities and concentration of various substances that can be released into the environment in connection with crude oil and natural gas drilling, production and transportation activities;
limit or prohibit drilling activities on certain lands lying within wilderness, wetlands and other protected areas including areas containing endangered species of plants and animals;
require remedial measures to mitigate pollution from former and ongoing operations, such as requirements to close pits and plug abandoned wells; and
impose substantial liabilities for pollution resulting from drilling and production operations.
These laws, rules and regulations may restrict the level of substances generated by our operations that may be emitted into the air, discharged to surface water, and disposed or otherwise released to surface and below-ground soils and groundwater, and may also restrict the rate of crude oil and natural gas production belowto a rate otherwise possible.that is economically infeasible for continued production. The regulatory burden on the crude oil and natural gas industry increases the cost of doing business and affects profitability. Additionally, the U.S. Congress and federal and state legislators and agencies frequently revise environmental laws, rules and regulations and anywith party control of Congress shifting in January 2021, there is potential for the Biden Administration to pursue new legislation and regulatory initiatives that revise the permitting or leasing policies pursued under the Trump Administration that could adversely affect the oil and gas industry. Moreover, President Biden has issued, and may continue to issue, executive orders in pursuit of his regulatory agenda. Any changes that result in more stringent and costly waste handling, disposal, cleanup and remediation requirements for the crude oil and natural gas industry or restrict, delay or ban oil and gas permitting or leasing on federal lands could have a significant impact on our operating costs and production of oil and gas.
Failure to comply with these and other laws, rules and regulations may result in the assessment of administrative, civil and criminal penalties, the imposition of corrective or remedial obligations or the incurrence of capital expenditures, the occurrence of restrictions, delays or cancellations in the permitting, development or performanceexpansion of projects, the issuance of orders enjoining performance of some or all of our operations, and potential litigation.litigation in a particular area. Additionally, certain of these environmental laws may result in imposition of joint and several or strict liability, which could cause us to become liable for the conduct of others or for consequences of our own actions. For instance, an accidental release from one of our wells could subject us to substantial liabilities arising from environmental cleanup and restoration costs, claims made by neighboring landowners or other third parties for personal injury and property damage and fines or penalties for related violations of environmental laws or regulations. Certain environmental laws also provide for certain citizen suits, which allow persons or organizations to act in place of the government and sue operators for alleged violations of environmental laws. We have incurred and will continue to incur operating and capital expenditures, some of which may be material, to comply with environmental laws and regulations. The following is a description of some of the environmental laws, rules and regulations that apply to our operations.
Air emissions and climate change. Federal, state, and local laws, rules, and regulations have been and, mayin the future, will likely be enacted to address concerns about emissions of regulated air pollutants, including the potential effects of carbon dioxide, methane and other identified “greenhouse gas” emissions on the environment and climate worldwide, generally referred to as “climate change.” For example, in Octobersince 2015 the U.S. Environmental Protection Agency ("EPA") revisedunder the Obama Administration has made revisions to the National Ambient Air Quality Standard (“NAAQS”) for ground-level ozone, from 75making the standard stricter. Since that time, the EPA under the Trump Administration has issued attainment and nonattainment designations and, on December 31, 2020, published notice of a final action, upon conducting a periodic review of the ozone standard, electing to 70 parts per billion for bothretain the 8-hour primary2015 ozone NAAQS in 2020 without revision on a going-forward basis. However, this December 2020 final action is subject to legal challenge, and secondary standards.the NAAQS may be subject to further revision under the Biden Administration. State implementation of the revised NAAQS for ground-level ozone could result in stricter permitting requirements, a delay or prohibitprohibition on our ability to obtain such permits, andor result in increased expenditures for pollution control equipment, the costs of which could be significant.
With respect to climate change and the control of greenhouse gas emissions, recent federalnumerous proposals have been made and are likely to continue to be made at the international, national, regional and state levels of government to monitor and limit existing emissions of greenhouse gases as well as to restrict or eliminate future emissions. Federal regulatory initiatives have focused on establishing construction and operating permit reviews for greenhouse gas emissions from certain large stationary sources, requiring the monitoring and annual reporting of greenhouse gas emissions from certain petroleum and natural gas system sources, and reducing methane emissions from oil and gas operations through limitations on venting and flaring and the implementation of enhanced emission leak detection and repair requirements. For example, in June 2016 the EPA under the Obama Administration finalized new regulations (New Source Performance Standard Subpart OOOOa, commonly referred to as “Quad Oa”) setting methane emission standards for new and modified oil and gas production and natural gas processing and transmission facilities. However, in recent years following the beginning of the Trump Administration in 2017, the EPA has undertaken several measures to delay implementation of the methane standards. Recently, in September 2020, the EPA issued
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its final policy and technical amendments to the 2016 final rule. The U.S. Departmentpolicy amendments, effective September 14, 2020, notably removed the transmission and storage sector from the regulated source category and rescinded methane and volatile organic compound requirements for the remaining sources that were established by former President Obama's Administration, whereas the technical amendments, effective November 16, 2020, included changes to fugitive emissions monitoring and repair schedules for gathering and boosting compressor stations and low-production wells, recordkeeping and reporting requirements, and more. Various states and industry and environmental groups are separately challenging both the original 2016 standards and the EPA’s September 2020 final rules and on January 20, 2021, President Biden issued an executive order that, among other things, directed the EPA to reconsider the technical amendments and issue a proposed rule suspending, revising or rescinding those amendments by no later than September 2021. A reconsideration of Interior’s Bureauthe September 2020 policy amendments is expected to follow. The January 20, 2021 executive order also directed the establishment of Land Management (“BLM”) finalized similar regulations in November 2016 for new methane and volatile organic compound standards applicable to existing oil and gas operations, including the production, transmission, processing and storage segments. Additionally, various states and groups of states have adopted or are considering adopting legislation, regulations or other regulatory initiatives that are focused on such areas as greenhouse gas cap and trade programs, carbon taxes, reporting and tracking programs, and restriction of emissions. At the international level, there exists the United Nations-sponsored "Paris Agreement," which is a non-binding agreement for nations to limit their greenhouse gas emissions through individually-determined reduction goals every five years after 2020. While the United States withdrew from the Paris Agreement under the Trump Administration, on January 20, 2021 President Biden issued an executive order recommitting the United States to the Paris Agreement and calling for the federal lands. Followinggovernment to begin formulating the change in U.S. presidential administrations in 2016, there have been attemptsUnited States’ nationally determined emissions reduction goal under the agreement. With the United States recommitting to modify these regulations, and litigation concerning the regulations is ongoing. As a result, we cannot predictParis Agreement, executive orders may be issued or federal legislation or regulatory initiatives may be adopted to achieve the scope of any final methane-related regulatory requirements or the costagreement’s goals, which could require us to incur increased costs to comply with such requirements. Some states have also imposed similar regulations on oil and
In addition, increasing concern over the threat of climate change arising from greenhouse gas operations, and it is possible new methane emission standards could be proposed in the future. However, we do not expect such measures will affect us in a materially different way from our similarly situated competitors.
At an international level, in December 2015 a global climate agreement was reached in Paris at the 21st Conference of Parties organized by the United Nations under the Framework Convention on Climate Change. The agreement, which goes into effect in 2020, resulted in nearly 200 countries, originally including the United States, committing to work towards limiting global warming and agreeingemissions has given rise to a monitoringseries of political, litigation, and review processfinancial risks associated with the production and processing of hydrocarbons and emission of greenhouse gas emissions. The agreement includes binding and non-binding elements and did not require ratification by the U.S. Congress. Following the change in U.S. presidential administrations, in August 2017 the U.S. State Department officially informed the United Nations of the intent ofgases. In addition to recommitting the United States to withdraw from the Paris Agreement, on January 20, 2021, the Acting Secretary of the U.S. Department of the Interior issued an order, effective immediately, that suspends new crude oil and natural gas leases and drilling permits on non-Indian federal lands and waters for a period of 60 days. Building on this suspension, President Biden issued an executive order on January 27, 2021 that suspends new leasing activities for oil and gas exploration and production on non-Indian federal lands and offshore waters pending completion of a comprehensive study of federal oil and gas permitting and leasing practices that take into consideration potential climate agreement.and other impacts associated with oil and gas activities on such lands and waters. As of December 31, 2020, we held approximately 41,800 net undeveloped acres on federal lands.

The January 20, 2021 and January 27, 2021 executive orders do not apply to existing leases and the January 27, 2021 order further directs applicable agencies to eliminate subsidies for the oil and gas sector. Legal challenges to these orders are expected, with at least one industry group already filing a lawsuit in January 2021 in Wyoming federal district court and seeking to have the moratorium on leasing declared invalid. Litigation risks are also increasing, as a number of states, municipalities and other parties have sought to bring suit against the largest oil and natural gas exploration and production companies in state or federal court, alleging, among other things, that such companies created public nuisances by producing fuels that contributed to global warming effects, such as rising sea levels, and therefore are responsible for roadway and infrastructure damages, or that the companies have been aware of the adverse effects of climate change for some time but failed to adequately disclose those impacts. There are also increasing financial risks for oil and gas producers, as stockholders and bondholders currently invested in energy companies concerned about the potential effects of climate change may elect to shift some or all of their investments into non-energy related sectors. Institutional investors who provide financing to energy companies have also focused on sustainability issues and some of them may elect not to provide funding for energy companies. Limitation of investments in and financings for oil and gas producers could result in reduced access to capital, higher costs of capital and the restriction, delay, or cancellation of development and production activities.
While we cannot predict the outcome of legislative or regulatory initiatives related to climate change, we anticipate that initiatives to reduce greenhouse gas emissions will continue to develop. The adoption of state or federal legislation or regulatory programs to reduce greenhouse gas emissions, including methane and carbon dioxide, could require us to incur increased operating costs, such as costs to purchase and operate emissions monitoring and control systems, to acquire emissions allowances, or comply with new regulatory or reporting requirements. Any such legislationAdditionally, political, litigation, and financial risks may result in restrictions or regulatory programs could also increasecancellations in development and production activities, liability for infrastructure damages due to climate changes, or increases in the cost of consuming hydrocarbons and thereby reducereducing demand for the crude oil and natural gas. Moreover, the increased competitiveness of alternative energy sources (such as wind, solar, geothermal, tidal and biofuels) could reduce demand for hydrocarbons, including the oil and gas we produce. Consequently, legislationproduce, which could lead to a reduction in our revenues. Also, there is the possibility that financial institutions will be required to adopt policies that limit funding for energy companies as President Biden recently signed an executive order calling for the development of a climate finance plan and, regulatory programs to reduceseparately, the
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Federal Reserve announced that it has joined the Network for Greening the Financial System, a consortium of financial regulators focused on addressing climate-related risks in the financial sector. Finally, increasing concentrations of greenhouse gas emissionsin the Earth's atmosphere may produce climate changes that have significant physical effects, such as increased frequency and severity of storms, droughts, floods, rising sea levels and other climatic events. Consequently, one or more of these developments could have an adverse effect on our business, financial condition, results of operations, and cash flows.


Environmental protection and natural gas flaring. One of our environmental initiatives is the reduction of air emissions produced from our operations, particularly with respect toincluding the flaring of natural gas from our operated well sites in the Bakken field of North Dakota. North Dakota statutes permitlaw permits flaring of natural gas from a well that has not been connected to a gas gathering line for a period of one year from the date of a well’s first production. After one year, a producer is required to cap the well, connect it to a gas gathering line, find acceptable alternative uses for a percentage of the flared gas, or apply to the North Dakota Industrial Commission ("NDIC") for a written exemption for any future flaring; otherwise, the producer is required to pay royalties and production taxes based on the volume and value of the gas flared from the unconnected well.
In addition, NDIC rules for new drilling permit applications also require the submission of gas capture plans addressing measuressetting forth plans taken by operators to capture and not flare produced gas, regardless of whether it has been or will be connected within the first year of production. The NDIC currently requires us to capture 88%91% of the natural gas produced from a field,field. If an operator is unable to attain the applicable gas capture percentage goal at maximum efficient rate, wells will be restricted in production to 200 barrels of crude oil per day if at least 60% of the monthly volume of associated natural gas produced from the well is captured, or otherwise crude oil production from such wells is not permitted to exceed 100 barrels of crude oil per day. However, the NDIC will consider temporary exemptions from the foregoing restrictions or for other types of extenuating circumstances after notice and beginning November 1, 2020hearing if the targeteffect is a significant net increase in gas capture rate increaseswithin one year of the date such relief is granted. Monetary penalty provisions also apply under this regulation if an operator fails to 91%.timely file for a hearing with the NDIC upon being unable to meet such percentage goals or if the operator fails to timely implement production restrictions once below the applicable percentage goals. Ongoing compliance with the NDIC’s flaring requirements or the imposition of any additional limitations on flaring could result in increased costs and have an adverse effect on our operations.
We continue to strive to reduce natural gas flaring as much as practicable, but our efforts may not always be successful or cost-effective. Our levels of flaring are impacted by external factors such as investment from third parties in the development and continued operation of gas gathering and processing facilities and the granting of reasonable right-of-way access by land owners. Increased emissions from our facilities due to flaring could subject our facilities to more stringent air emission permitting requirements, resulting in increased compliance costs and potential construction delays.
Hydraulic fracturing. Hydraulic fracturing involves the injection of water, sand or other proppant and additives under pressure into rock formations to stimulate crude oil and natural gas production. In recent years there has been public concern regarding an alleged potential for hydraulic fracturing to adversely affect drinking water supplies andor to induce seismic events. As a result, several federal and state agencies are studyinghave studied the environmental risks with respect to hydraulic fracturing, and proposals have been made to enact separate federal, state and local legislation that would potentially increase the regulatory burden imposed on hydraulic fracturing.
At the federal level, the EPA has asserted federal regulatory authority pursuant to the federal Safe Drinking Water Act ("SDWA") over certain hydraulic fracturing activities involving the use of diesel fuels and published permitting guidance in February 2014 related to such activities. In June 2016,Also, the EPA finalizedhas issued a final regulation under the Clean Water Act prohibiting discharges to publicly owned treatment works of wastewater from onshore unconventional oil and gas extraction facilities. It hasWe do not been our practice to discharge wastewater to publicly owned treatment works, so the impact of this regulation on us is not currently, and is not expected to be, material.
In Decemberlate 2016 the EPA published a final study of the potential impacts of hydraulic fracturing activities on water resources in which the EPA indicated it found evidence that such activities can impact drinking water resources under some circumstances. In its final report, the EPA indicated it was not able to calculate or estimate the national frequency of impacts on drinking water resources from hydraulic fracturing activities or fully characterize the severity of impacts. Nonetheless, the results of the EPA’s study or similar governmental reviews could spur initiatives to regulate hydraulic fracturing under the SDWA or otherwise.
In March 2015,2016, the BLM issuedunder the Obama Administration published final rules related to the regulation of hydraulic fracturing activities on federal lands, including requirements for chemical disclosure, well bore integrity, and handling of flowback water. However, the BLM subsequently rescindedunder the rulesTrump Administration published a final rule rescinding the 2016 final rule in December 2017.November 2018. Litigation challenging the BLM's rescission2016 final rule as well as its 2018 final rule rescinding the 2016 rule has been filedpursued by certainvarious states and industry and environmental groupsgroups. While a California federal court vacated the 2018 final rule in July 2020, a Wyoming federal court subsequently vacated the 2016 final rule in October 2020 and, remains ongoing. As of December 31, 2018, we held approximately 59,700 net undeveloped acresaccordingly, the 2016 final rule is no
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longer in effect. The Wyoming decision is expected to be appealed. Moreover, the BLM under a Biden Administration could seek to pursue regulatory initiatives that regulate hydraulic fracturing activities on federal land, representing approximately 11%lands.
While the U.S. Congress has from time to time considered but refused to adopt federal regulation of our total net undeveloped acres.hydraulic fracturing, there is a possibility that a Biden Administration will pursue such legislation. In addition to pursuing the revision of existing laws and regulations, President Biden has issued, and may continue to issue, additional executive orders in pursuit of his regulatory agenda with regards to limiting hydraulic fracturing.
In addition, regulators in states in which we operate have adopted or are considering additional requirements related to seismicity and its potential association with hydraulic fracturing. For example, the Oklahoma Corporation Commission (the “OCC”) has promulgated guidance for operators of crude oil and natural gas wells in certain seismically-active areas of the SCOOP and STACK plays in Oklahoma. The OCC's guidance provides for seismic monitoring and for implementation of mitigation procedures, which may include curtailment or even suspension of operations in the event of concurrent seismic events within a particular radius of operations of a magnitude exceeding 2.5 on the Richter scale. If seismic events exceeding the OCC guidance thresholds were to occur near our active stimulation operations on a frequent basis, they could have an adverse effect on our operations.
Waste water disposal. Underground injection wells are a predominant method for disposing of waste water from oil and gas activities. In response to seismic events near underground injection wells used for the disposal of oil and gas-related waste waters, federal and some state agencies are investigatinghave investigated whether such wells have caused increased seismic activity. SomeTo address concerns regarding seismicity, some states, including states in which we operate, have delayedpursued remedies that included delaying permit approvals, mandatedmandating a reduction in injection volumes, or have shutshutting down or imposedimposing moratoria on the use of injection wells. RegulatorsMoreover, regulators in states in which we operate are consideringhave implemented additional requirements related to seismicity. For example, the OCC has adopted rules for operators of saltwater disposal wells in certain seismically-active areas in the Arbuckle formation of Oklahoma. These rules require, among other things, that


disposal well operators conduct mechanical integrity testing or make certain demonstrations of such wells’ respective depths that, depending on the depth, could require plugging the well and/or the reduction of volumes disposed in such wells. Oklahoma utilizes a “traffic light” system wherein the OCC reviews new or existing disposal wells for proximity to faults, seismicity in the area and other factors in determining whether such wells should be permitted, permitted only with special restrictions, or not permitted. At the federal level, the EPA’s current regulatory requirements for such wells do not require the consideration of seismic impacts when issuing permits. We cannot predict the EPA’s future actions in this regard.
The introduction of new environmental initiativeslaws and regulations related to the disposal of wastes associated with the exploration, development or production of hydrocarbons could limit or prohibit our ability to utilize underground injection wells. A lack of waste water disposal sites could cause us to delay, curtail or discontinue our exploration and development plans. Additionally, increased costs associated with the transportation and disposal of produced water, including the cost of complying with regulations concerning produced water disposal, may reduce our profitability. These costs are commonly incurred by oil and gas producers and we do not believeexpect the costs associated with the disposal of produced water will have a material adverse effect on our operations to any greater degree than other similarly situated competitors. In recent years, we have increased our operation and use of water recycling and distribution facilities in Oklahoma that economically reuse stimulation water for both operational efficiencies and environmental benefits.
We have incurred in the past, and expect to incur in the future, capital and other expenditures related to environmental compliance. Such expenditures are included within our overall capital and operating budgets and are not separately itemized. Although we believeHistorically, our continuedenvironmental compliance with existing requirements willcosts have not havehad a material adverse impact on our financial condition and results of operations, we cannot assure you the passage of more stringent laws or regulationsoperations; however, there can be no assurance that such costs will not be material in the future or that such future compliance will not materiallyhave a material impact on our business, financial condition, results of operations or cash flows.

Employee Health and Safety. We are also subject to the requirements of the federal Occupational Safety and Health Act ("OSHA") and comparable state laws that regulate the protection of the health and safety of workers. In addition, the OSHAU.S. Occupational Safety and Health Administration hazard communication standard, the EPA community right-to-know regulation under Title III of the federal superfund Amendment and Reauthorization Act and similar state laws and regulations require information be maintained about hazardous materials used or produced in operations and this information be provided to employees, state and local governmental authorities and citizens.
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Human Capital

Employees and Labor Relations
As of December 31, 2018,2020, we employed 1,221 people. Our future success will depend partially on1,201 people, all of which were employed in the United States, with 716 employees being located at our abilitycorporate headquarters in Oklahoma City, Oklahoma and 485 employees located in our field offices located in Oklahoma, North Dakota, South Dakota, and Montana.  None of our employees are subject to collective bargaining agreements.  We believe our overall relations with our workforce are good.

Compensation
Because we operate in a highly competitive environment, we have designed our compensation program to attract, retain and motivate qualified personnel.experienced, talented individuals.  Our program is also designed to align employee’s interests with those of our shareholders and to reward them for achieving the business and strategic objectives determined to be important to help the Company create and maintain advantage in a competitive environment.  We are notalign our employee’s interests with those of our shareholders by making annual restricted stock awards to virtually all of our employees.  We reward our employees for their performance in helping the Company achieve its annual business and strategic objectives through our bonus program, which is also available to virtually all of our employees.  In order to ensure our compensation package remains competitive and fulfills our goal of recruiting and retaining talented employees, we consider competitive market compensation paid by other companies comparable to the Company in size, geographic location, and operations.

Safety
Safety is our highest priority and one of our core values. We promote safety with a party to any collective bargaining agreementsrobust health and have not experienced any strikes or work stoppages. We considersafety program that includes employee orientation and training, contractor management, risk assessments, hazard identification and mitigation, audits, incident reporting and investigation, and corrective/preventative action development.  

Through our relations with“Brother’s Keeper” program, we encourage each of our employees to be satisfactory.a proactive participant in ensuring the safety of all of the Company’s personnel.  We utilizedeveloped this program to leverage and continuously improve our ability to identify and prevent reoccurrence of unsafe behaviors and conditions.  This program recognizes and rewards any employee or contractor working on one of our locations who observes and reports outstanding safety and environmental behavior such as utilizing stop work authority, looking out for a co-worker, reporting incidents and near misses, or following proper safety procedures. This program positively impacts safety performance and has contributed to a substantial increase in our reporting rates and to decreases in recordable incident and lost time incident rates. Our Total Recordable Incident Rate (TRIR), a commonly used safety metric that measures the servicesnumber of independentrecordable incidents per 100 full-time employees and contractors during a one year period, has decreased sequentially in each of the past three years and measured 0.40 for 2020, a 53% decrease compared to perform2017.

Training and Development
We are committed to the training and development of our employees.  We believe that supporting our employees in achieving their career and development goals is a key element of our approach to attracting and retaining top talent.  We have invested in a variety of resources to support employees in achieving their career and development goals, including developing learning paths for individual contributors and leaders, creating the Continental Leadership Learning Center which offers numerous different instructor-led programs which foster employee development and acquiring a learning management system which provides access to numerous technical and soft skills online courses.  We also invest time and resources in supporting the creation of individual development plans for our employees. 

Health and Wellness
We offer various fieldbenefit programs designed to promote the health and well-being of our employees and their families. These benefits include medical, dental, and vision insurance plans; disability and life insurance plans; paid time off for holidays, vacation, sick leave, and other services.personal leave; and healthcare flexible spending accounts, among other things.In addition to these programs, we have a number of other programs designed to further promote the health and wellness of our employees. For instance, employees at our corporate headquarters have access to our fitness center. Additionally, we have an employee assistance program that offers counseling and referral services for a broad range of personal and family situations. We also offer a wellness plan that includes annual biometric screenings, flu shots, smoking cessation programs, and healthy snack options in our break rooms to encourage total body wellness.
In response to the COVID-19 pandemic, commencing in the first quarter of 2020, we have taken, and continue to take, proactive measures to protect the health and safety of our employees. These measures have included the implementation of a voluntary testing program to provide our employees and their household members with reliable and timely test results when
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public testing options were limited and restricted, maintaining social distancing policies, limiting the number of employees attending meetings, reducing the number of people at our sites, requiring the use of masks in certain circumstances, suspending employee business travel, requiring employees to complete daily self-screening questionnaires, performing temperature checks, frequently and extensively disinfecting common areas, performing rigorous contact tracing protocols, and implementing self-isolation and quarantine requirements, among other things. We are committed to maintaining best practices with our COVID-19 response protocols and will continue to work under the guidance of public health officials to ensure a safe workplace as long as COVID-19 remains a threat to our employees and communities.

Diversity and Inclusion
We are committed to providing a diverse and inclusive workplace and career development opportunities to attract and retain talented employees. We recognize that a diverse workforce provides the best opportunity to obtain unique perspectives, experiences, ideas, and solutions to help our business succeed. To that end, we prohibit discrimination and harassment of any type and afford equal employment opportunities to employees and applicants without regard to race, color, religion, sex, national origin, age, disability, genetic information, veteran status, or any other basis protected by local, state, or federal law. Further, we forbid retaliation against any individual who reports, claims, or makes a charge of discrimination or harassment, fraud, unethical conduct, or a violation of our Company policies. To sustain and promote an inclusive culture, we maintain a robust compliance program rooted in our Code of Business Conduct and Ethics, which provides policies and guidance on non-discrimination, anti-harassment, and equal employment opportunities. We require all employees to complete periodic training sessions on various aspects of our Code of Business Conduct and Ethics and other corporate policies through an annual acknowledgement and certification process. We evaluate ways to enhance awareness of diversity and inclusion on an ongoing basis in an effort to continue improving our approach.
Company Contact Information
Our corporate internet website is www.clr.com. Through the investor relations section of our website, we make available free of charge our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and any amendments to those reports as soon as reasonably practicable after the report is filed with or furnished to the SEC. For a current version of various corporate governance documents, including our Code of Business Conduct and Ethics, Corporate Governance Guidelines, and the charters for various committees of our Board of Directors, please see our website. We intend to disclose amendments to, or waivers from, our Code of Business Conduct and Ethics by posting to our website. Information contained on our website is not incorporated by reference into this report and you should not consider information contained on our website as part of this report.
We intend to use our website as a means of disclosing material information and for complying with our disclosure obligations under SEC Regulation FD. Such disclosures will be included on our website in the “For Investors”“Investors” section. Accordingly, investors should monitor that portion of our website in addition to following our press releases, SEC filings and public conference calls and webcasts.
We electronically file periodic reports and proxy statements with the SEC.The SEC maintains an internet website that contains reports, proxy and information statements, and other information registrants file with the SEC. The address of the SEC’s website is www.sec.gov.
Our principal executive offices are located at 20 N. Broadway, Oklahoma City, Oklahoma 73102, and our telephone number at that address is (405) 234-9000.

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Item 1A.Risk Factors
Item 1A.    Risk Factors
You should carefully consider each of the risks described below, together with all other information contained in this report in connection with an investment in our securities. If any of the following risks develop into actual events, our business, financial condition, or results of operations, or cash flows could be materially adversely affected, the trading price of our securities could decline and you may lose all or part of your investment.
Business and Operating Risks
Substantial declines in commodity prices or extended periods of low commodity prices adversely affect our business, financial condition, results of operations and cash flows and our ability to meet our capital expenditure needs and financial commitments.
The prices we receive for sales of our crude oil and natural gas production impact our revenue, profitability, cash flows, access to capital, capital budget, rate of growth, and carrying value of our properties. Crude oil and natural gas are commodities and prices are subject to wide fluctuations in response to relatively minor changes in supply and demand. Historically, the markets for crude oil and natural gas have been volatile and unpredictable. For example, during 20182020 the NYMEX West Texas Intermediate (“WTI”) crude oil and Henry Hub natural gas spot prices ranged from approximately $44negative $36.98 to $77positive $63.27 per barrel and $2.49$1.33 to $6.24$3.14 per MMBtu, respectively. Commodity prices will likely remain volatile and unpredictable in 20192021 and beyond.
We have hedged the majority A significant portion of our forecasted 2019 natural gas production. Our future crude oil and natural gas production is currently unhedged as of the time of this filing and is directly exposed to continued volatility in market prices, whether favorable or unfavorable.
The prices we receive for sales of our production depend on numerous factors beyond our control. These factors include, but are not limited to, the following:
worldwide, domestic, and regional economic conditions impacting the supply of, and demand for, crude oil, natural gas, and natural gas liquids;
the actions of the Organization of Petroleum Exporting Countries and other petroleum producing nations;
the nature, extent, and extentimpact of domestic and foreign governmental laws, regulations, and taxation, including environmental laws and regulations governing the imposition of trade restrictions and tariffs;
executive, regulatory or legislative actions by Congress, the Biden Administration, or states in which we operate;
geopolitical events and conditions, including domestic political uncertainty or foreign regime changes that impact government energy policies;
the level of global, national, and regional crude oil and natural gas exploration and production activities;
the level of global, national, and regional crude oil and natural gas inventories, which may be impacted by economic sanctions applied to certain producing nations;
the level and effect of speculative trading in commodity futures markets;
the relative strength of the United States dollar compared to foreign currencies;
the price and quantity of imports of foreign crude oil;
the price and quantity of exports of crude oil or liquefied natural gas from the United States;
military and political conditions in, or affecting other, crude oil-producing and natural gas-producing nations;
localized supply and demand fundamentals;
the cost and availability, proximity and capacity of transportation, processing, storage and refining facilities for various quantities and grades of crude oil, natural gas, and natural gas liquids;
adverse weather conditions, natural disasters, and natural disasters;national and global health epidemics and concerns, including the COVID-19 pandemic;
technological advances affecting energy production and consumption;
the effect of worldwide energy conservation and greenhouse emission limitations or other environmental protection efforts; and
the price and availability of alternative fuels or other energy sources.
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Sustained material declines in commodity prices reduce cash flows available for capital expenditures, repayment of indebtedness and other corporate purposes; may limit our ability to borrow money or raise additional capital; and may reduce our proved reserves and the amount of crude oil and natural gas we can economically produce.
In addition to reducing our revenue, cash flows and earnings, depressed prices for crude oil and/or natural gas may adversely affect us in a variety of other ways. If commodity prices decrease substantially, some of our exploration and development projects could become uneconomic, and we may also have to make significant downward adjustments to our estimated proved reserves and our estimates of the present value of those reserves. If these price effects occur, or if our estimates of production or economic factors change, accounting rules may require us to write down the carrying value of our crude oil and/or natural gas properties.


Lower commodity prices may also lead to reductions in our drilling and completion programs, which may result in insufficient production to satisfy our transportation and processing commitments. If production is not sufficient to meet our commitments we would incur deficiency fees that would need to be paid absent any cash inflows generated from the sale of production.
Lower commodity prices may also reduce our access to capital and lead to a downgrade or other negative rating action with respect to our credit rating. A downgrade of our credit rating could negatively impact our cost of capital, increase the borrowing costs under our revolving credit facility, and limit our ability to access capital markets and execute aspects of our business plans. As a result, substantial declines in commodity prices or extended periods of low commodity prices may materially and adversely affect our future business, financial condition, results of operations, cash flows, liquidity and ability to finance plannedmeet our capital expendituresexpenditure needs and commitments.
VolatilityThe ability or willingness of Saudi Arabia and other members of OPEC, and other oil exporting nations, including Russia, to set and maintain production levels has a significant impact on crude oil prices.
The Organization of Petroleum Exporting Countries ("OPEC") is an intergovernmental organization that seeks to manage the price and supply of crude oil on the global energy market. Actions taken by OPEC members, including those taken alongside other oil exporting nations such as Russia, may have a significant impact on global oil supply and pricing. For example, OPEC and certain other oil exporting nations have previously agreed to take measures, including production cuts, to support crude oil prices. However, in March 2020, members of OPEC and Russia were unable to agree on production levels and, in response, Saudi Arabia announced it would significantly increase production and cut the financial markets or in globalprices at which it sold crude oil. These actions, coupled with the economic factors, including consequences resulting from international trade disputes and tariffs, could adversely impact our business.
United States and global economies may experience periods of volatility and uncertainty from timethe COVID-19 pandemic, led to time,a sudden and drastic decrease in crude oil prices in March 2020, which materially impacted our business, results of operations, and cash flows. It is not certain what impact current or future agreements or disagreements among these parties will have on crude oil prices, particularly in light of the significant decrease in crude oil demand resulting from the COVID-19 pandemic. There can be no assurance that OPEC members and other oil exporting nations will comply with agreed-upon production cuts, agree to further production cuts in unstable consumer confidence, diminished consumer demandthe future, or utilize other actions to support and spending, diminished liquidity and credit availability, and inabilitystabilize oil prices, nor can there be any assurance they will not increase production or deploy other actions aimed at reducing oil prices. Uncertainty regarding future actions to access capital markets. In recent years, certain global economies have experienced periodsbe taken by OPEC members or other oil exporting countries could lead to increased volatility in the price of political uncertainty, slowing economic growth, rising interest rates, changing economic sanctions, and currency volatility. These global macroeconomic conditions may have a negative impact on commodity prices and the availability and cost of materials used in our industry,oil, which in turn could have a material adverse effect on our business, financial condition, results of operations, and cash flows.
Our business operations, financial position, results of operations, and cash flows have been and may continue to be materially and adversely affected by the COVID-19 pandemic.
The current administration in the United StatesCOVID-19 pandemic has expressed concerns in recent years about imports from countries it perceives are engaging in unfair trade practices. In 2018, the United States government initiated tariffs on certain imported goodsnegatively impacted, and has raised the possibility of imposing tariff increases on such goods or expanding the scope of tariffswill likely continue to include other types of imported goods. In response, certain foreign governments, most notably China, have imposed retaliatory tariffs on certain goods their countries import from the United States. These and other events, including the United Kingdom's potential withdraw from the European Union, have contributed to increased economic uncertainty and diminished expectations fornegatively impact, the global economy.
Trade restrictions oreconomy which has led to, among other governmental actions related to tariffs or trade policies have impacted, and have the potential to further impact, our business and industry. For instance, in 2018 the United States government imposed import tariffs of 25% on steel products and 10% on aluminum products, as well as quantitative restrictions on imports of steel and aluminum products from various countries. The oil and gas industry in the United States utilizes significant amounts of steel in the drilling and completion of new wells and for construction of facilities, pipelines, processing plants, and refineries. The steel required to meet the needs of our industry may not be domestically available in sufficient quantities, particularly in periods of favorable commodity prices. Thus, current and future tariffs may increase the cost of materials used in various aspects of upstream, midstream, and downstream oil and gas activities which, in turn, could increase our cost of doing business. Furthermore, the tariffs and quantitative import restrictions may cause disruption in the energy industry’s supply chain, resulting in the delay or cessation of drilling and completion efforts or the postponement or cancellation of new pipeline transportation projects the U.S. industry is relying on to transport its increasing levels of onshore production to market, as well as endangering U.S. liquefied natural gas export projects resulting in negative impacts on natural gas production. Additionally, trade and/or tariff disputes could have negative impacts on the domestic andthings, reduced global economies overall, which could result in reduced demand for crude oil, disruption of global supply chains, and natural gas. Anysignificant volatility and disruption of financial and commodity markets.
We began to experience material decreases in our revenues in the above consequences could have a material adverse effect onfirst quarter of 2020, which negatively impacted our business, financial condition, results of operations, cash flows and cash flows.outlook during 2020. The adverse effects of COVID-19 included or may in the future include the following:
Historically low crude oil prices;
Limitations on storage and transportation capacity and an inability to market our production;
Curtailment or shutting in of production;
Delay or cessation of drilling and completion projects;
Insufficient production to satisfy transportation and processing commitments;
Impairment of assets;
Downgrades or other negative credit rating actions resulting in increased borrowing costs;
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An inability to develop acreage before lease expiration;
A reduction in the volume and value of proved reserves from price declines, changes in drilling programs, and the effects of shutting in production;
Our ability to repay or refinance indebtedness, increase our credit facility commitments, borrow money, or raise capital;
Disruptions in energy industry supply chains;
Credit losses due to insolvency of customers, joint interest owners, and counterparties;
Cyber incidents or information security breaches resulting in information theft, data corruption, operational disruption, and/or financial loss as a consequence of employees accessing information from remote work locations; and
Shortages of drilling rigs, well completion crews, field services, personnel, and equipment in future periods of commodity price recovery.
The extent to which COVID-19 and depressed crude oil prices impacts our results of operations, financial position and liquidity will depend on future developments, which are uncertain and cannot be predicted, including but not limited to, the availability of effective treatments and vaccines, the ultimate duration of the pandemic, and how quickly and to what extent normal economic and operating conditions can resume. Therefore, the degree and duration of the adverse financial impact of the pandemic cannot be reasonably estimated at this time.
Our producing properties are located in limited geographic areas, making us vulnerable to risks associated with having geographically concentrated operations.
A substantialsignificant portion of our producing properties is located in the Bakken field of North Dakota and Montana, with that area comprising approximately 56%53% of our crude oil and natural gas production and approximately 68%61% of our crude oil and natural gas revenues for the year ended December 31, 2018.2020. Approximately 52%46% of our estimated proved reserves were located in the Bakken as of December 31, 2018.2020. Additionally, in recent years we have significantly expanded our operations in Oklahoma with our increased activity in the SCOOP and STACK plays. Our properties in Oklahoma comprised approximately 41%45% of our crude oil and natural gas production and approximately 27%35% of our crude oil and natural gas revenues for the year ended December 31, 2018.2020. Approximately 45%52% of our estimated proved reserves were located in Oklahoma as of December 31, 2018.2020.
Because of this concentration in limited geographic areas, the success and profitability of our operations may be disproportionately exposed to regional factors compared to competitors having more geographically dispersed operations. These factors include, among others: (i) our reliance on a limited number of pipelines to deliver our production to markets, (ii) the prices of crude oil and natural gas produced from wells in the regions and other


regional supply and demand factors, including gathering, pipeline and rail transportation capacity constraints; (ii)(iii) the availability of rigs, completion crews, waste water disposal wells, equipment, field services, water, supplies, and labor; (iii)(iv) the availability of processing and refining facilities; and (iv)(v) infrastructure capacity. In addition, our operations in the Bakken field and Oklahoma may be adversely affected by severe weather events such as floods, blizzards, extreme cold, ice storms, drought, and tornadoes, which can intensify competition for the items and services described above and may result in periodic shortages. The concentration of our operations in limited geographic areas also increases our exposure to changes in local laws and regulations, certain lease stipulations designed to protect wildlife, and unexpected events that may occur in the regions such as natural disasters, seismic events (which may result in third-party lawsuits), industrial accidents, labor difficulties, civil disturbances, public protests, cyber attacks, or terrorist attacks. Any one of these events has the potential to cause producing wells to be shut-in, delay operations, decrease cash flows, increase operating and capital costs and prevent development of lease inventory before expiration. Any of the risks described above could have a material adverse effect on our business, financial condition, results of operations and cash flows.
Drilling for and producing crude oil and natural gas are high risk activities with many uncertainties that could adversely affect our business, financial condition or results of operations. We may not be insured for, or our insurance may be inadequate to protect us against, these risks.
Our future financial condition and results of operations depend on the success of our exploration, development and production activities. Our crude oil and natural gas exploration and production activities are subject to numerous risks, including the risk that drilling will not result in commercially viable crude oil or natural gas production. Our decisions to purchase, explore, or develop prospects or properties will depend in part on the evaluation of data obtained through geophysical and geological analyses, production data, and engineering studies, the results of which are often inconclusive or subject to varying interpretations. Our cost of drilling, completing and operating wells may be uncertain before drilling commences.
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In this report, we describe some of our current prospects and plans to develop our key operating areas. Our management has specifically identified prospects and scheduled drilling locations as an estimation of our future multi-year drilling activities on our existing acreage. Our ability to drill and develop these locations is subject to a number of risks and uncertainties as described herein. If future drilling results do not establish sufficient reserves to achieve an economic return, we may curtail our drilling and completion activities. Prospects we decide to drill that do not produce crude oil or natural gas in expected quantities may adversely affect our results of operations, financial condition, and rates of return on capital employed. The use of seismic data and other technologies and the study of producing fields in the same area will not enable us to know conclusively prior to drilling whether crude oil or natural gas will be present in expected or economically producible quantities. We cannot assure you the wells we drill will be as productive as anticipated or whether the analogies we draw from other wells, more fully explored prospects, or producing fields will be applicable to our drilling prospects. Because of these uncertainties, we do not know if our potential drilling locations will ever be drilled or if we will be able to produce crude oil or natural gas from these or any other potential drilling locations in sufficient quantities to achieve an economic return.
Risks we face while drilling include, but are not limited to, failing to place our well bore in the desired target producing zone; not staying in the desired drilling zone while drilling horizontally through the formation; failing to run our casing the entire length of the well bore; and not being able to run tools and other equipment consistently through the horizontal well bore. Risks we face while completing our wells include, but are not limited to, not being able to fracture stimulate the planned number of stages; failing to run tools the entire length of the well bore during completion operations; not successfully cleaning out the well bore after completion of the final fracture stimulation stage; increased seismicity in areas near our completion activities; unintended interference of completion activities performed by us or by third parties with nearby operated or non-operated wells being drilled, completed, or producing; and failure of our optimized completion techniques to yield expected levels of production.
Further, many factors may occur that cause us to curtail, delay or cancel scheduled drilling and completion projects, including but not limited to:
abnormal pressure or irregularities in geological formations;
shortages of or delays in obtaining equipment or qualified personnel;
shortages of or delays in obtaining components used in fracture stimulation processes such as water and proppants;
delays associated with suspending our operations to accommodate nearby drilling or completion operations being conducted by other operators;
mechanical difficulties, fires, explosions, equipment failures or accidents, including ruptures of pipelines or storage facilities, or train derailments;
restrictions on the use of underground injection wells for disposing of waste water from oil and gas activities;
political events, public protests, civil disturbances, terrorist acts or cyber attacks;
decreases in, or extended periods of low, crude oil and natural gas prices;
title problems;
environmental hazards, such as uncontrollable flows of crude oil, natural gas, brine, well fluids, hydraulic fracturing fluids, toxic gas or other pollutants into the environment, including groundwater and shoreline contamination;
adverse weather conditions and natural disasters;
spillage or mishandling of crude oil, natural gas, brine, well fluids, hydraulic fracturing fluids, toxic gas or other pollutants by us or by third party service providers;
limitations in infrastructure, including transportation, processing, refining and exportation capacity, or markets for crude oil and natural gas; and
delays imposed by or resulting from compliance with regulatory requirements including permitting.
Any of the above risks could adversely affect our ability to conduct operations or result in substantial losses to us as a result of:
injury or loss of life;
damage to or destruction of property, natural resources and equipment;
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pollution and other environmental damage;
regulatory investigations and penalties;
suspension of our operations;
repair and remediation costs; and
litigation.
We are not insured against all risks associated with our business. We may elect to not obtain insurance if we believe the cost of available insurance is excessive relative to the risks presented or for other reasons. In addition, pollution and environmental risks are generally not fully insurable.
Losses and liabilities arising from any of the above events could hinder our ability to conduct normal operations and could adversely affect our business, financial condition, results of operations and cash flows.
Reserve estimates depend on many assumptions that may turn out to be inaccurate. The present value of future net revenues from our proved reserves will not necessarily be the same as the current market value of our estimated crude oil and natural gas reserves. Any material inaccuracies in our reserve estimates or underlying assumptions will materially affect the quantities and present value of our reserves. The Company’s current estimates of reserves could change, potentially in material amounts, in the future due to changes in commodity prices, business strategies, and other factors. Additionally, unless we replace our crude oil and natural gas reserves, our total reserves and production will decline, which could adversely affect our cash flows and results of operations.
The process of estimating crude oil and natural gas reserves is complex and inherently imprecise. It requires interpretation of available technical data and many assumptions, including assumptions relating to current and future economic conditions, production rates, drilling and operating expenses, and commodity prices. Any significant inaccuracy in these interpretations or assumptions could materially affect our estimated quantities and present value of our reserves. See Part I, Item 1. Business—Crude Oil and Natural Gas Operations—Proved Reserves for information about our estimated crude oil and natural gas reserves, standardized measure of discounted future net cash flows, and PV-10 as of December 31, 2020.
In order to prepare reserve estimates, we must project production rates and the amount and timing of development expenditures. We must also analyze available geological, geophysical, production and engineering data in preparing reserve estimates. The extent, quality and reliability of this data can vary which in turn can affect our ability to model the porosity, permeability and pressure relationships in unconventional resources. The process also requires economic assumptions, based on historical data projected into the future, about crude oil and natural gas prices, drilling and operating expenses, capital expenditures, taxes, and availability of funds.
Actual future production, crude oil and natural gas sales prices, revenues, taxes, development expenditures, operating expenses and quantities of recoverable crude oil and natural gas reserves will vary and could vary significantly from our estimates. Any significant variance could materially affect the estimated quantities and present value of our reserves, which in turn could have an adverse effect on the value of our assets. In addition, we may remove or adjust estimates of proved reserves, potentially in material amounts, to reflect production history, results of exploration and development activities, changes in business strategies, prevailing crude oil and natural gas prices and other factors, some of which are beyond our control.
You should not assume the present value of future net revenues from our proved reserves is the current market value of our estimated crude oil and natural gas reserves. We base the estimated discounted future net revenues from proved reserves on the 12-month unweighted arithmetic average of the first-day-of-the-month commodity prices for the preceding twelve months. Actual future prices may be materially higher or lower than the average prices used in the calculations. In addition, the use of a 10% discount factor, which is required by the SEC to be used to calculate discounted future net revenues for reporting purposes, may not be the most appropriate discount factor based on interest rates in effect from time to time and risks associated with our reserves or the crude oil and natural gas industry. For the year ended December 31, 2020, average prices used to calculate our estimated proved reserves were $39.57 per Bbl for crude oil and $1.99 per MMBtu for natural gas ($34.34 per Bbl for crude oil and $1.17 per Mcf for natural gas adjusted for location and quality differentials).NYMEX WTI crude oil and Henry Hub natural gas first-day-of-the-month commodity prices for January 1, 2021 and February 1, 2021 averaged $51.04 per barrel and $2.53 per MMBtu, respectively. See Part I, Item 1. Business—Crude Oil and Natural Gas Operations—Proved Reserves—Proved Reserve, Standardized Measure, and PV-10 Sensitivities for proved reserve sensitivities under certain increasing and decreasing commodity price scenarios.
In addition, the development of our proved undeveloped reserves may take longer than anticipated and may not be ultimately developed or produced. At December 31, 2020, approximately 43% of our total estimated proved reserves (by volume) were
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undeveloped. Recovery of undeveloped reserves requires significant capital expenditures and successful drilling operations. Our reserve estimates assume we can and will make these expenditures and conduct these operations successfully. These assumptions may not prove to be accurate. Our reserve report at December 31, 2020 includes estimates of total future development costs over the next five years associated with our proved undeveloped reserves of approximately $3.9 billion. We cannot be certain the estimated costs of the development of these reserves are accurate, development will occur as scheduled, or the results of such development will be as estimated. If we choose not to spend the capital to develop these reserves, or if we are not otherwise able to successfully develop these reserves as a result of our inability to fund necessary capital expenditures or otherwise, we will be required to remove the associated volumes from our reported proved reserves. Proved undeveloped reserves generally must be drilled within five years from the date of initial booking under SEC reserve rules. Changes in the timing of development plans that impact our ability to develop such reserves in the required time frame have resulted, and will likely in the future result, in fluctuations in reserves between periods as reserves booked in one period may need to be removed in a subsequent period. In 2020, 107 MMBoe of proved undeveloped reserves were removed from our year-end reserve estimates associated with locations no longer scheduled to be drilled within five years from the date of initial booking primarily due to a reduction in the scope of our future drilling programs based on adverse market conditions, reduced demand, and lower prices caused by the COVID-19 pandemic.
Additionally, unless production is established within the spacing units covering the undeveloped acres on which some of the locations are identified, the leases for such acreage will expire. If we are not able to renew leases before they expire, any proved undeveloped reserves associated with such leases will be removed from our proved reserves. The combined net acreage expiring in the next three years represents 50% of our total net undeveloped acreage at December 31, 2020. At that date, we had leases representing 61,293 net acres expiring in 2021, 69,609 net acres expiring in 2022, and 49,475 net acres expiring in 2023.
Furthermore, unless we conduct successful exploration, development and exploitation activities or acquire properties containing proved reserves, our proved reserves will decline as those reserves are produced. Producing crude oil and natural gas reservoirs are generally characterized by declining production rates that vary depending upon reservoir characteristics and other factors. Our future crude oil and natural gas reserves and production, and therefore our cash flows and results of operations, are highly dependent on our success in efficiently developing our current reserves and economically finding or acquiring additional recoverable reserves. We may not be able to develop, find or acquire sufficient additional reserves to replace our current and future production. If we are unable to replace our current and future production, the value of our reserves will decrease, and our business, financial condition and results of operations could be materially adversely affected.
Our business depends on crude oil and natural gas transportation, processing, refining, and export facilities, most of which are owned by third parties.
The value we receive for our crude oil and natural gas production depends in part on the availability, proximity and capacity of gathering, pipeline and rail systems and processing, refining, and export facilities owned by third parties. The inadequacy or unavailability of capacity on these systems and facilities could result in the shut-in of producing wells, the delay or discontinuance of development plans for properties, or higher operational costs associated with air quality compliance controls. Although we have some contractual control over the transportation of our products, changes in these business relationships or failure to obtain such services on acceptable terms could adversely affect our operations. If our production becomes shut-in for any of these or other reasons, we will be unable to realize revenue from those wells until other arrangements are made for the sale or delivery of our products and acreage lease terminations could result if production is shut-in for a prolonged period.
The disruption of transportation, processing, refining, or export facilities due to contractual disputes or litigation, labor disputes, maintenance, civil disturbances, international trade disputes, public protests, terrorist attacks, cyber attacks, adverse weather, natural disasters, seismic events, health epidemics and concerns, changes in tax and energy policies, federal, state and international regulatory developments, changes in supply and demand, equipment failures or accidents, including pipeline and gathering system ruptures or train derailments, and general economic conditions could negatively impact our ability to achieve the most favorable prices for our crude oil and natural gas production. We have no control over when or if access to such facilities would be restored or the impact on prices in the areas we operate. A significant shut-in of production in connection with any of the aforementioned items could materially affect our cash flows, and if a substantial portion of the impacted production fulfills transportation or processing commitments or is hedged at lower than market prices, those commitments or financial hedges would have to be paid from borrowings in the absence of sufficient operating cash flows.
Our operated crude oil and natural gas production is ultimately transported to downstream market centers in the United States primarily using transportation facilities and equipment owned and operated by third parties. See Part I, Item 1. Business—Regulation of the Crude Oil and Natural Gas Industry for a discussion of regulations impacting the transportation of crude oil and natural gas. From time to time we may sell our operated crude oil production at market centers in the United States to third parties who then subsequently export and sell the crude oil in international markets. We do not currently own or operate infrastructure used to facilitate the transportation and exportation of crude oil; however, third party compliance with regulations
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that impact the transportation or exportation of our production may increase our costs of doing business and inhibit a third party's ability to transport and sell our production, whether domestically or internationally, the consequences of which could have a material adverse effect on our business, financial condition, results of operations and cash flows.
On July 6, 2020, the U.S. District Court for the District of Columbia ruled that the U.S. Army Corps of Engineers (“Corps”), which had previously issued an easement near tribal lands allowing the Dakota Access Pipeline (“DAPL”) to cross a water body, had failed to adequately consider the environmental impacts under the National Environmental Protection Act (“NEPA”) arising out of such pipeline crossing this water body, and directed the Corps to prepare a new environmental impact statement (“EIS”) as well as ordering the owners of DAPL to shut down the pipeline pending completion of the EIS. The DAPL is owned and operated by a third party and carries Bakken-produced crude oil from North Dakota to Illinois. The pipeline owner sought an emergency stay of the shut-down order from the U.S. Court of Appeals for the District of Columbia Circuit (the “Appeals Court”). On July 14, 2020, the Appeals Court issued a temporary administrative stay of such order, which has allowed the pipeline to continue operating. On January 26, 2021, the Appeals Court affirmed that part of the lower court decision vacating the Corps’ easement while it prepares a new EIS, but reversed the lower court’s order to shut down the pipeline because the lower court had not properly evaluated such a move under an applicable NEPA factoring test established under case law. As stated by the Appeals Court, the Corps is within its authority to shut down the pipeline and the Appeals Court would expect the Corps to make that decision “promptly.” On February 9, 2021, the Corps, through the Department of Justice, sought a delay of the proceedings to give lawyers time to brief the new presidential administration on the background of the DAPL matter. Accordingly, the continued operation of DAPL in the future is uncertain. The Company utilizes DAPL to transport a portion of its North region crude oil production to ultimate markets on the U.S. gulf coast. Currently, the Company is committed to transport 3,550 barrels per day on the pipeline through February 2026 and has an additional commitment to transport an incremental 26,450 barrels per day for 7 years effective upon the pending completion of a DAPL expansion project which is estimated to occur in the second half of 2021. If transportation capacity on DAPL becomes restricted or unavailable, we have the ability to utilize other third party pipelines or rail facilities to transport our Bakken crude oil production to market, although such alternatives may be more costly. A restriction of DAPL’s takeaway capacity may have an impact on prices for Bakken-produced barrels and result in wider differentials relative to WTI benchmark prices in the future, the amount of which is uncertain.
Our exploration, development and exploitation projects require substantial capital expenditures. We may be unable to obtain needed capital or financing on acceptable terms, which could lead to a decline in our crude oil and natural gas reserves, production and revenues. In addition, funding our capital expenditures with additional debt will increase our leverage and doing so with equity securities may result in dilution that reduces the value of your stock.
The crude oil and natural gas industry is capital intensive. We make and expect to continue to make substantial capital expenditures in our business for the exploration, development, exploitation, production and acquisition of crude oil and natural gas reserves. We have budgeted $2.6$1.40 billion for capital expenditures attributable to us in 20192021 of which approximately $2.2$1.11 billion is allocated to exploration and development activities. We may adjust our 20192021 capital spending plans upward or downward depending on market conditions. Our 20192021 capital budget, based on our current expectations of commodity prices and costs, is expected to be funded from operating cash flows and, if necessary, through borrowings under our credit facility.flows. However, the sufficiency of our cash flows from operations and access to capital areis subject to a number of variables, including but not limited to:
the prices at which crude oil and natural gas are sold;
the volume and value of our proved reserves;
the volume of crude oil and natural gas we are able to produce and sell from existing wells; and
our ability to acquire, locate and produce new reserves;
our ability to dispose of assets or enter into joint development arrangements on satisfactory terms; and
the ability and willingness of our lenders to extend credit or of participants in the capital markets to invest in our senior notes or equity securities.
If oil and gas industry conditions weaken as a result of low commodity prices or other factors, we may not be able to generate sufficient cash flows and may have limited ability to obtain the capital necessary to sustain our operations at current or planned levels. A decline in cash flows from operations may require us to revise our capital program or alter or increase our capitalization substantially through the issuance of debt or equity securities.
We have a revolving credit facility with lender commitments totaling $1.5 billion that matures in April 2023. In the future, we may not be able to access adequate funding under our revolving credit facility if our lenders are unwilling or unable to meet their funding obligations or increase their commitments under the credit facility. Our lenders could decline to increase their commitments based on our financial condition, the financial condition of our industry or the economy as a whole or for other reasons beyond our control. Due to these and other factors, we cannot be certain that funding, if needed, will be available to the extent required or on terms we find acceptable. If operating cash flows are insufficient and we are unable to access funding or execute capital transactions when needed on acceptable terms, we may not be able to fully implement our business plans, fund our capital program and commitments, complete new property acquisitions to replace reserves, take advantage of business
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opportunities, respond to competitive pressures, or refinance debt obligations as they come due. Should any of the above risks occur, they could have a material adverse effect on our business, financial condition, results of operations and cash flows.
Drilling for and producing crude oil and natural gas are high risk activities with many uncertainties that could adversely affect our business, financial condition or results of operations.
Our future financial condition and results of operations will depend on the success of our exploration, development and production activities. Our crude oil and natural gas exploration and production activities are subject to numerous risks, including the risk that drilling will not result in commercially viable crude oil or natural gas production. Our decisions to purchase, explore, or develop prospects or properties will depend in part on the evaluation of data obtained through geophysical and geological analyses, production data, and engineering studies, the results of which are often inconclusive or subject to varying interpretations. Our cost of drilling, completing and operating wells may be uncertain before drilling commences.


Risks we face while drilling include, but are not limited to, failing to place our well bore in the desired target producing zone; not staying in the desired drilling zone while drilling horizontally through the formation; failing to run our casing the entire length of the well bore; and not being able to run tools and other equipment consistently through the horizontal well bore. Risks we face while completing our wells include, but are not limited to, not being able to fracture stimulate the planned number of stages; failing to run tools the entire length of the well bore during completion operations; not successfully cleaning out the well bore after completion of the final fracture stimulation stage; increased seismicity in areas near our completion activities; unintended interference of completion activities performed by us or by third parties with nearby operated or non-operated wells being drilled, completed, or producing; and failure of our optimized completion techniques to yield expected levels of production.
Further, many factors may curtail, delay or cancel scheduled drilling projects, including but not limited to:
abnormal pressure or irregularities in geological formations;
shortages of or delays in obtaining equipment or qualified personnel;
shortages of or delays in obtaining components used in fracture stimulation processes such as water and proppants;
delays associated with suspending our operations to accommodate nearby drilling or completion operations being conducted by other operators;
mechanical difficulties, fires, explosions, equipment failures or accidents, including ruptures of pipelines or train derailments;
restrictions on the use of underground injection wells for disposing of waste water from oil and gas activities;
political events, public protests, civil disturbances, terrorist acts or cyber attacks;
decreases in, or extended periods of low, crude oil and natural gas prices;
limited availability of financing with acceptable terms;
title problems;
environmental hazards, such as uncontrollable flows of crude oil, natural gas, brine, well fluids, hydraulic fracturing fluids, toxic gas or other pollutants into the environment, including groundwater and shoreline contamination;
spillage or mishandling of crude oil, natural gas, brine, well fluids, hydraulic fracturing fluids, toxic gas or other pollutants by us or by third party service providers;
limitations in infrastructure, including transportation, processing and refining capacity, or markets for crude oil and natural gas; and
delays imposed by or resulting from compliance with regulatory requirements including permitting.
Any of the above events could hinder our ability to conduct normal operations and could adversely affect our business, financial condition, results of operations and cash flows.
Reserve estimates depend on many assumptions that may turn out to be inaccurate. Any material inaccuracies in our reserve estimates or underlying assumptions will materially affect the quantities and present value of our reserves. The Company’s current estimates of reserves could change, potentially in material amounts, in the future due to changes in commodity prices, business strategies, and other factors.
The process of estimating crude oil and natural gas reserves is complex and inherently imprecise. It requires interpretation of available technical data and many assumptions, including assumptions relating to current and future economic conditions, production rates, drilling and operating expenses, and commodity prices. Any significant inaccuracy in these interpretations or assumptions could materially affect our estimated quantities and present value of our reserves. See Part I, Item 1. Business—Crude Oil and Natural Gas Operations—Proved Reserves for information about our estimated crude oil and natural gas reserves, standardized measure of discounted future net cash flows, and PV-10 as of December 31, 2018.
In order to prepare reserve estimates, we must project production rates and the amount and timing of development expenditures. Proved undeveloped reserves generally must be drilled within five years from the date of initial booking under SEC reserve rules. Changes in the timing of development plans that impact our ability to develop such reserves in the required time frame have resulted, and will likely in the future result, in fluctuations in reserves between periods as reserves booked in one period may need to be removed in a subsequent period. In 2018, 234 MMBoe of proved undeveloped reserves were removed from our year-end reserve estimates associated with locations no longer scheduled to be drilled within five years from the date of initial booking.


We must also analyze available geological, geophysical, production and engineering data in preparing reserve estimates. The extent, quality and reliability of this data can vary which in turn can affect our ability to model the porosity, permeability and pressure relationships in unconventional resources. The process also requires economic assumptions, based on historical data projected into the future, about crude oil and natural gas prices, drilling and operating expenses, capital expenditures, taxes, and availability of funds.
The prices used in calculating our estimated proved reserves are calculated by determining the unweighted arithmetic average of the first-day-of-the-month commodity prices for the preceding 12 months. For the year ended December 31, 2018, average prices used to calculate our estimated proved reserves were $65.56 per Bbl for crude oil and $3.10 per MMBtu for natural gas($61.20 per Bbl for crude oil and $3.22 per Mcf for natural gas adjusted for location and quality differentials). Actual future prices may be materially higher or lower than those used in our year-end estimates. NYMEX WTI crude oil and Henry Hub natural gas first-day-of-the-month commodity prices for January 1, 2019 and February 1, 2019 averaged $50.34 per barrel and $3.03 per MMBtu, respectively. See Part I, Item 1. Business—Crude Oil and Natural Gas Operations—Proved Reserves—Proved Reserve, Standardized Measure, and PV-10 Sensitivities for proved reserve sensitivities under certain increasing and decreasing commodity price scenarios.
Actual future production, crude oil and natural gas sales prices, revenues, taxes, development expenditures, operating expenses and quantities of recoverable crude oil and natural gas reserves will vary and could vary significantly from our estimates. Any significant variance could materially affect the estimated quantities and present value of our reserves, which in turn could have an adverse effect on the value of our assets. In addition, we may remove or adjust estimates of proved reserves, potentially in material amounts, to reflect production history, results of exploration and development activities, changes in business strategies, prevailing crude oil and natural gas prices and other factors, some of which are beyond our control.
The present value of future net revenues from our proved reserves will not necessarily be the same as the current market value of our estimated crude oil and natural gas reserves.
You should not assume the present value of future net revenues from our proved reserves is the current market value of our estimated crude oil and natural gas reserves. We base the estimated discounted future net revenues from proved reserves on the 12-month unweighted arithmetic average of the first-day-of-the-month commodity prices for the preceding twelve months. Actual future prices may be materially higher or lower than the average prices used in the calculations. Actual future net revenues from crude oil and natural gas properties will be affected by factors such as:
the actual prices we receive for sales of crude oil and natural gas;
the actual cost and timing of development and production expenditures;
the timing and amount of actual production; and
changes in governmental regulations or taxation.
The timing of both our production and our incurrence of costs in connection with the development and production of crude oil and natural gas properties will affect the timing and amount of actual future net revenues from proved reserves, and thus their actual present value. In addition, the use of a 10% discount factor, which is required by the SEC to be used to calculate discounted future net revenues for reporting purposes, may not be the most appropriate discount factor based on interest rates in effect from time to time and risks associated with our reserves or the crude oil and natural gas industry. Any significant variances in timing or assumptions could materially affect the estimated present value of our reserves, which in turn could have an adverse effect on the value of our assets.
We may be required to further write down the carrying values of our crude oil and natural gas properties if commodity prices decline or our development plans change.
Accounting rules require we periodically review the carrying values of our crude oil and natural gas properties for possible impairment. Proved properties are reviewed for impairment on a field-by-field basis each quarter. We use the successful efforts method of accounting whereby the estimated future cash flows expected in connection with a field are compared to the carrying amount of the field to determine if the carrying amount is recoverable. If the carrying amount of the field exceeds its estimated undiscounted future cash flows, the carrying amount of the field is reduced to its estimated fair value using a discounted cash flow model.
Based on specific market factors, prices, and circumstances at the time of prospective impairment reviews, and the continuing evaluation of development plans, production data, economics and other factors, we may be required to write down the carrying values of our crude oil and natural gas properties. A write-down results in a non-cash charge to earnings. We have incurred impairment charges in the past and may incur additional impairment charges in the future, particularly if commodity prices decline, which could have a material adverse effect on our results of operations for the periods in which such charges are taken.


Unless we replace our crude oil and natural gas reserves, our reserves and production will decline, which could adversely affect our cash flows and results of operations.
Unless we conduct successful exploration, development and exploitation activities or acquire properties containing proved reserves, our proved reserves will decline as those reserves are produced. Producing crude oil and natural gas reservoirs are generally characterized by declining production rates that vary depending upon reservoir characteristics and other factors. Our future crude oil and natural gas reserves and production, and therefore our cash flows and results of operations, are highly dependent on our success in efficiently developing our current reserves and economically finding or acquiring additional recoverable reserves. We may not be able to develop, find or acquire sufficient additional reserves to replace our current and future production. If we are unable to replace our current and future production, the value of our reserves will decrease, and our business, financial condition and results of operations could be materially adversely affected.
The unavailability or high cost of drilling rigs, well completion crews, water, equipment, supplies, personnel and field services could adversely affect our ability to execute our exploration and development plans within budget and on a timely basis.
In the regions in which we operate, there have historically been shortages of drilling rigs, well completion crews, equipment, personnel, field services, and supplies, including key components used in fracture stimulation processes such as water and proppants, as well as high costs associated with these critical components of our operations. With current technology, water is an essential component of drilling and hydraulic fracturing processes. The availability of water sources and disposal facilities is becoming increasingly competitive, constrained, subject to social and regulatory scrutiny, and impacted by third-party supply chains over which we may have limited control. Limitations or restrictions on our ability to secure, transport, and use sufficient amounts of water, including limitations resulting from natural causes such as drought, could adversely impact our operations. In some cases, water may need to be obtained from new sources and transported to drilling or completion sites, resulting in increased costs.
The demand for qualified and experienced field service providers and associated equipment, supplies, and materials can fluctuate significantly, often in correlation with commodity prices, causing periodic shortages and/or higher costs. Such shortages or higher costs could delay the execution of our drilling and development plans or cause us to incur expenditures not provided for in our capital budget or to not achieve the rates of return we are targeting for our development program, all of which could have a material adverse effect on our business, financial condition, results of operations and cash flows.

We have been an early entrant into new or emerging plays. As a result, our drilling results in these areas are uncertain, and the value of our undeveloped acreage will decline if drilling results are unsuccessful.
While our costs to acquire undeveloped acreage in new or emerging plays have generally been less than those of later entrants into a developing play, our drilling results in new or emerging areas are more uncertain than drilling results in developed and producing areas. Since new or emerging plays have limited or no production history, we are unable to use past drilling results in those areas to help predict our future drilling results. As a result, our cost of drilling, completing and operating wells in these areas may be higher than initially expected, and the value of our undeveloped acreage in the emerging areas may decline if drilling results are unsuccessful.
We may incur substantial losseshave limited control over the activities on properties we do not operate.
Some of the properties in which we have an ownership interest are operated by other companies and be subject to substantial liability claims as a resultinvolve third-party working interest owners. As of December 31, 2020, non-operated properties represented 14% of our crudeestimated proved developed reserves, 10% of our estimated proved undeveloped reserves, and 12% of our estimated total proved reserves. We have limited ability to influence or control the operations or future development of non-operated properties, including the marketing of oil and natural gas operations. Additionally, we may not be insured for, or our insurance may be inadequate to protect us against, these risks.
We are not insured against all risks associatedproduction, compliance with our business. Lossesenvironmental, occupational safety and liabilities arising from uninsured and under-insured events could materially and adversely affect our business, financial condition or results of operations. Our activities are subject to all of the operating risks associated with drilling for and producing crude oil and natural gas, including the possibility of:
environmental hazards, such as uncontrollable flows of crude oil, natural gas, brine, well fluids, hydraulic fracturing fluids, toxic gas or other pollutants into the environment, including groundwater and shoreline contamination;
abnormally pressured formations;
mechanical difficulties, such as stuck oilfield drilling and service tools and casing collapse;
fires and explosions;
ruptures of pipelines or storage facilities;
loss of product or property damage occurring as a result of transfer to a rail car or train derailments;
personal injuries and death;
adverse weather conditions and natural disasters; and
spillage or mishandling of crude oil, natural gas, brine, well fluids, hydraulic fracturing fluids, toxic gas or other pollutants by us or by third party service providers.
Any of these risks could adversely affect our ability to conduct operations or result in substantial losses to us as a result of:
injury or loss of life;
damage to or destruction of property, natural resources and equipment;
pollutionhealth and other environmental damage;
regulatory investigationsregulations, or the amount of expenditures required to fund the development and penalties;
suspensionoperation of such properties. Moreover, we are dependent on other working interest owners on these projects to fund their contractual share of capital and operating expenditures. These limitations and our operations;
repairdependence on the operators and remediation costs;other working interest owners for these projects could cause us to incur unexpected future costs and
litigation.


We may elect to not obtain insurance if we believe the cost of available insurance is excessive relative to the risks presented or for other reasons. In addition, pollution and environmental risks are generally not fully insurable. The occurrence of an event not fully covered by insurance could have a material adverse effect on our business, financial condition, results of operations and cash flows.
Prospects we decideWe may be subject to drill may not produce crude oil or natural gasrisks in expected quantities.connection with acquisitions, divestitures, and joint development arrangements.
Prospects we decide to drill that do not produce crude oil or natural gas in expected quantities may adversely affect our results of operations, financial condition, and rates of return on capital employed. In this report, we describe someAs part of our current prospectsbusiness strategy, we have made and planswill likely continue to develop our key operating areas. It is not possible to predict with certainty whether any particular prospect will produce crudemake acquisitions of oil or naturaland gas in sufficient quantities to recover drillingproperties, divest assets, and completion costs, achieve desired recoveries and rates of return, or be economically producible.enter into joint development arrangements. The use of seismic data and other technologies and the studysuccessful acquisition of producing fields in the same area willproperties requires an assessment of several factors, including but not enable us to know conclusively prior to drilling whether crude oil or natural gas will be present in expected or economically producible quantities. We cannot assure you the wells we drill will be as productive as anticipated or whether the analogies we draw from other wells, more fully explored prospects, or producing fields will be applicable to our drilling prospects.limited to:
Our identified drilling locations are scheduled out over several years, making them susceptible to uncertainties that could materially alter the occurrence or timing of their drilling.recoverable reserves;
Our management has specifically identified and scheduled drilling locations as an estimation of our future multi-year drilling activities on our existing acreage. Our ability to drill and develop these locations is subject to a number of uncertainties, including crude oil and natural gas prices; prices and location and quality differentials;
the availabilityquality of capital, drilling rigs, well completion crews,the title to acquired properties;
future development costs, operating costs and transportationproperty taxes; and processing capacity; costs; drilling results; regulatory approvals;
potential environmental and other factors. If future drilling results do not establish sufficient reserves to achieve an economic return, we may curtail drilling in these projects. Becauseliabilities.
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The accuracy of these uncertainties,acquisition assessments is inherently uncertain. In connection with these assessments, we do not know if our potential drilling locations will everperform a review, which we believe to be drilled or if we will be able to produce crude oil or natural gas from these or any other potential drilling locations in sufficient quantities to achieve an economic return. In addition, unless production is established within the spacing units covering the undeveloped acres on which somegenerally consistent with industry practices, of the locationssubject properties. Our review will not reveal all existing or potential problems nor will it permit us to become sufficiently familiar with the properties to fully assess their deficiencies and capabilities prior to acquisition. Inspections may not always be performed on every property, and environmental problems are not necessarily observable even when an inspection is undertaken. Even when problems are identified, the leases for such acreage will expire. Low commodity prices, reduced capital spending, lackseller of available drilling and completion rigs and crews and numerous other factors, manythe subject properties may be unwilling or unable to provide effective contractual protection against all or part of which are beyond our control, could result in our failure to establish production on undeveloped acreage, and, if wethe problems. We sometimes are not ableentitled to renew leases before they expire, any proved undeveloped reserves associated with such leases will be removed from our proved reserves. The combined net acreage expiring in the next three years represents 60% of our total net undeveloped acreage at December 31, 2018. At that date, we had leases representing 136,174 net acres expiring in 2019, 107,840 net acres expiring in 2020,contractual indemnification for environmental liabilities and 69,345 net acres expiring in 2021. Our actual drilling activities may materially differ from those presently identified, which could adversely affect our business.acquire properties on an “as is” basis.
The development of our proved undeveloped reserves may take longer and may require higher levels of capital expenditures than we currently anticipate. Our proved undeveloped reserves may not be ultimately developed or produced.
At December 31, 2018, approximately 56% of our total estimated proved reserves (by volume) were undeveloped and may not be ultimately developed or produced. Recovery of undeveloped reserves requires significant capital expenditures and successful drilling operations. Our reserve estimates assume we can and will make these expenditures and conduct these operations successfully. These assumptions may not prove to be accurate. Our reserve report at December 31, 2018 includes estimates of total future development costs over the next five years associated with our proved undeveloped reserves of approximately $9.2 billion. We cannot be certain the estimated costs of the development of these reserves are accurate, development will occur as scheduled, or the results of such development will be as estimated. If we choose not to spend the capital to develop these reserves, or if we are not otherwise able to successfully develop these reserves as a result of our inability to fund necessary capital expenditures or otherwise, we will be required to remove the associated volumes from our reported proved reserves. In addition, under the SEC’s reserve rules, because proved undeveloped reserves generally may be booked only if they relate to wells scheduled to be drilled within five years of the date of booking, we may be required to remove any proved undeveloped reserves not developed within this five-year time frame. Such removals have occurred in the past and may occur in the future. A removal of such reserves could adversely affect our operations. In 2018, 234 MMBoe of proved undeveloped reserves were removed from our year-end reserve estimates associated with locations no longer scheduled to be drilled within five years from the date of initial booking.




Our business depends on crude oil and natural gas transportation, processing, refining, and export facilities, most of which are owned by third parties.
The value we receive for our crude oil and natural gas production depends in part on the availability, proximity and capacity of gathering, pipeline and rail systems and processing, refining, and export facilities owned by third parties. The inadequacy or unavailability of capacity on these systems and facilities could result in the shut-in of producing wells, the delay or discontinuance of development plans for properties, or higher operational costs associated with air quality compliance controls. Although we have some contractual control over the transportation of our products, changes in these business relationships or failure to obtain such services on acceptable terms could adversely affect our operations. If our production becomes shut-in for any of these or other reasons, we would be unable to realize revenue from those wells until other arrangements were made for the sale or delivery of our products and acreage lease terminations could result if production is shut-in for a prolonged period.
The disruption of transportation, processing, refining, or export facilities due to labor disputes, maintenance, civil disturbances, international trade disputes, public protests, terrorist attacks, cyber attacks, adverse weather, natural disasters, seismic events, changes in tax and energy policies, federal, state and international regulatory developments, changes in supply and demand, equipment failures or accidents, including pipeline and gathering system ruptures or train derailments, and general economic conditions could negatively impact our ability to achieve the most favorable prices for our crude oil and natural gas production. We have no control over when or if access to such facilities would be restored or the impact on prices in the areas we operate. A significant shut-in of production in connection with any of the aforementioned items could materially affect our cash flows, and if a substantial portion of the impacted production fulfills transportation or processing commitments or is hedged at lower than market prices, those commitments or financial hedges would have to be paid from borrowings in the absence of sufficient operating cash flows.
Our operated crude oil and natural gas production is ultimately transported to downstream market centers in the United States primarily using transportation facilities and equipment owned and operated by third parties. See Part I, Item 1. Business—Regulation of the Crude Oil and Natural Gas Industry for a discussion of regulations impacting the transportation of crude oil and natural gas. From time to time we may sell our operated crude oil production at market centers in the United States to third parties who then subsequently export and sell the crude oil in international markets. We do not currently own or operate infrastructure used to facilitate the transportation and exportationotherwise dispose of crude oil; however, third party compliance with regulations that impact the transportation or exportationcertain assets as a result of an evaluation of our productionasset portfolio or to provide cash flow for use in reducing debt and enhancing liquidity. Such divestitures have inherent risks, including possible delays in closing, the risk of lower-than-expected sales proceeds for the disposed assets, and potential post-closing adjustments and claims for indemnification. Additionally, volatility and unpredictability in commodity prices may increase our costsresult in fewer potential bidders, unsuccessful sales efforts, and a higher risk that buyers may seek to terminate a transaction prior to closing. The occurrence of doing business and inhibit a third party's ability to transport and sell our production, whether domestically or internationally,any of the consequences of whichmatters described above could have a materialan adverse effectimpact on our business, financial condition, results of operations and cash flows.
Our business depends onVolatility in the availability of water and the ability to dispose of waste water from oil and gas activities. Limitationsfinancial markets or restrictions on our ability to obtain or dispose of water may have an adverse effect on our financial condition, results of operations and cash flows.
With current technology, water is an essential component of drilling and hydraulic fracturing processes. Limitations or restrictions on our ability to secure sufficient amounts of water (including limitationsin global economic conditions, including consequences resulting from natural causes such as drought), or to dispose of or recycle water after use,domestic political uncertainty, geopolitical events, international trade disputes and tariffs, and health epidemics could adversely impact our operations. In some cases, waterbusiness.
United States and global economies may needexperience periods of volatility and uncertainty from time to be obtained from new sources and transported to drilling or completion sites,time, resulting in increased costs. Moreover, the introduction of new environmental initiativesunstable consumer confidence, diminished consumer demand and regulations relatedspending, diminished liquidity and credit availability, and inability to water acquisition or waste water disposal, including produced water, drilling fluids and other wastes associated with the exploration, development or production of hydrocarbons, could limit or prohibit our ability to utilize hydraulic fracturing or waste water injection wells.
access capital markets. In addition, concerns have been raised in recent years, aboutcertain global economies have experienced periods of political uncertainty, slowing economic growth, rising interest rates, changing economic sanctions, health-related concerns, and currency volatility. These global macroeconomic conditions may have a negative impact on commodity prices and the potential for seismic events to occur from the use of underground injection wells, a predominant method for disposing of waste water from oilavailability and gas activities. Rules and regulations have been developed in Oklahoma to address these concerns by limiting or eliminating the ability to use disposal wells in certain locations or increasing the cost of disposal. We operate injection wells and utilize injection wells owned by third parties to dispose of waste water associated withmaterials used in our operations. Some states, including statesindustry, which in which we operate, have delayed permit approvals, mandated a reduction in injection volumes, or have shut down or imposed moratoria on the use of injection wells. Regulators in some states, including states in which we operate, have imposed or are considering additional requirements related to seismicity. See Part I, Item 1. Business—Regulation of the Crude Oil and Natural Gas Industry—Environmental regulation—Waste water disposal for further discussion of regulations that affect us.
Compliance with existing or new environmental laws, regulations, and permit requirements governing the withdrawal, storage, and use of water necessary for hydraulic fracturing of wells or the disposal of waste water may increase our operating costs or may cause us to delay, curtail or discontinue our exploration and development plans, whichturn could have a material adverse effect on our business, financial condition, results of operations and cash flows.

In recent years, the United States government has initiated new tariffs on certain imported goods and has imposed increases to certain existing tariffs on imported goods. In response, certain foreign governments, most notably China, imposed retaliatory tariffs on certain goods their countries import from the United States. These and other events, including the United Kingdom's withdrawal from the European Union and the COVID-19 pandemic, have contributed to increased uncertainty for domestic and global economies. Additionally, growing trends toward populism and political polarization globally and in the U.S. have resulted in uncertainty regarding potential changes in regulations, fiscal policy, social programs, domestic and foreign relations, and government energy policies, which could pose a potential threat to domestic and global economic growth.

We are subjectTrade restrictions or other governmental actions related to complex federal, statetariffs or trade policies have impacted, and local lawshave the potential to further impact, our business and regulations that could adversely affectindustry by increasing the cost mannerof materials used in various aspects of upstream, midstream, and downstream oil and gas activities. Furthermore, tariffs and any quantitative import restrictions, particularly those impacting the cost and availability of steel and aluminum, may cause disruption in the energy industry’s supply chain, resulting in the delay or feasibilitycessation of conducting our operationsdrilling and completion efforts or expose usthe postponement or cancellation of new pipeline transportation projects the U.S. industry is relying on to significant liabilities.
Ourtransport its onshore production to market, as well as endangering U.S. liquefied natural gas export projects resulting in negative impacts on natural gas production. Additionally, trade and/or tariff disputes have impacted, and have the potential to further impact, domestic and global economies overall, which could result in reduced demand for crude oil and natural gas exploration and production operations are subject to complex and stringent federal, state and local laws and regulations, including those governing environmental protection, occupational health and safety, the discharge of materials into the environment, and the protection of certain plant and animal species. See Part I, Item 1. Business—Regulationgas. Any of the Crude Oil and Natural Gas Industry for a description of the laws and regulations that affect us. In order to conduct operations in compliance with these laws and regulations, we must obtain and maintain numerous permits, approvals and certificates from various federal, state and local governmental authorities. Environmental regulations may restrict the types, quantities and concentration of materials released into the environment in connection with drilling and production activities, limit or prohibit drilling activities on certain lands lying within wilderness, wetlands and other protected areas, and impose substantial liabilities for pollution resulting from our operations. In addition, we may experience delays in obtaining or be unable to obtain required permits, which may delay or interrupt our operations and limit our growth and revenues.
Failure to comply with laws and regulations may trigger a variety of administrative, civil and criminal enforcement investigations or actions, including investigatory actions, the assessment of monetary penalties, the imposition of remedial requirements, the issuance of orders or judgments limiting or enjoining future operations, criminal sanctions, or litigation. Strict liability or joint and several liability may be imposed under certain laws, whichabove consequences could cause us to become liable for the conduct of others or for consequences of our own actions. For instance, an accidental release from one of our wells could subject us to substantial liabilities arising from environmental cleanup and restoration costs, claims made by neighboring landowners and other third parties for personal injury and property damage and fines or penalties for related violations of environmental laws or regulations.
Moreover, changes to existing laws or regulations, new laws or regulations, or changes in interpretations of laws and regulations may unfavorably impact us or the infrastructure used for transporting our products. Similarly, changes in regulatory policies and priorities could result in the imposition of new laws or regulations, such as increased reporting or audits. Any of these requirements could result in increased operating costs and could have a material adverse effect on our financial condition and results of operations. If such laws and regulations are adopted, they could result in, among other items, additional restrictions on hydraulic fracturing of wells, restrictions on the disposal of waste water from oil and gas activities, restrictions on emissions of greenhouse gases, modification of equipment utilized in our operations, changes to the calculation of royalty payments, restrictions on transportation of production, new safety requirements, and additional regulation of private energy commodity derivative and hedging activities. These and other potential laws, regulations, interpretations and other requirements could increase our operating costs, reduce our liquidity, delay our operations or otherwise alter the way we conduct our business. This, in turn, could have a material adverse effect on our financial condition, results of operations and cash flows.
Climate change legislation or regulations governing the emissions of “greenhouse gases” could result in increased operating costs, limitations in our ability to develop and produce reserves, and reduced demand for the crude oil, natural gas and natural gas liquids we produce.
In response to EPA findings that emissions of carbon dioxide, methane and other greenhouse gases endanger human health and the environment, the EPA has adopted regulations under existing provisions of the federal Clean Air Act establishing, among other things, Prevention of Significant Deterioration (“PSD”) pre-construction and Title V operating permit reviews for certain large stationary sources. Facilities required to obtain PSD permits for greenhouse gas emissions are also required to meet “best available control technology” standards established on a case-by-case basis. The EPA has also adopted rules requiring the monitoring and reporting of greenhouse gas emissions from specified onshore and offshore oil and gas production sources in the United States on an annual basis, which include certain of our operations. Regulations related to greenhouse gas emissions could adversely affect our operations and restrict or delay our ability to obtain air permits for new or modified sources.
Certain previously existing climate-related regulations, such as those related to the control of methane emissions, have been, or are in the process of being, reviewed, suspended, revised, or rescinded. See Part I, Item 1. Business—Regulation of the Crude Oil and Natural Gas Industry—Environmental regulation—Air emissions and climate change for further discussion of the status of such regulations. Undoing previously existing regulations has and likely will continue to involve lengthy notice-and-comment rulemaking, and the resulting decisions have been and likely will continue to be subject to litigation by opposition groups. Thus, the scope and impact of existing and potential future regulations remains substantially uncertain with respect to the implementation of climate-related public policies. However, given the long-term trend towards increasing regulation, future federal greenhouse gas regulations of the oil and gas industry remain possible, and certain states have separately imposed their own regulations on emissions from oil and gas production activities and other states may do so as well.
The implementation of, and compliance with, laws and regulations that require reporting of greenhouse gases or otherwise limit emissions of greenhouse gases from our equipment and operations could require us to incur costs to monitor and report on


greenhouse gas emissions, install new equipment to reduce emissions of greenhouse gases associated with our operations, or limit our ability to develop and produce our reserves. In addition, substantial limitations on greenhouse gas emissions could adversely affect the demand for the crude oil and natural gas we produce, which could lower the value of our reserves and have a material adverse effect on our business, financial condition, results of operations and cash flows. Moreover, activists concerned about the potential effects of climate change have directed their attention at sources of funding for energy companies, which has and may yet result in financial institutions, funds, and other sources of capital restricting or eliminating their investment in crude oil and natural gas activities. Finally, some scientists have concluded that increasing concentrations of greenhouse gases in the Earth’s atmosphere may produce climate changes that have significant physical effects, such as increased frequency and severity of storms, droughts, floods or other climatic events. If any such effects were to occur as a result of climate change or otherwise, they could have an adverse effect on our assets and operations.
Federal and state laws and regulations relating to hydraulic fracturing could result in increased costs, additional operating restrictions or delays, and an inability to develop existing reserves or to book future reserves.
Hydraulic fracturing is an important and commonly used process in the completion of crude oil and natural gas wells in low-permeability formations. Hydraulic fracturing involves the high-pressure injection of water, sand or other proppant and additives into rock formations to stimulate crude oil and natural gas production. In recent years there has been public concern regarding an alleged potential for hydraulic fracturing to adversely affect drinking water supplies and to induce seismic events. As a result, several federal and state proposed and enacted laws and regulations have emerged which could increase the regulatory burden imposed on hydraulic fracturing. See Part I, Item 1. Business—Regulation of the Crude Oil and Natural Gas Industry—Environmental regulation—Hydraulic fracturing for a description of the laws and regulations that affect us with respect to hydraulic fracturing.
States in which we operate have adopted or are considering adopting laws and regulations imposing more stringent permitting, disclosure, and well construction and reclamation requirements on hydraulic fracturing activities. Local governments also may seek to adopt ordinances within their jurisdictions regulating or prohibiting the time, place and manner of drilling activities or hydraulic fracturing activities. In certain areas of the United States, new drilling permits for hydraulic fracturing have been put on hold pending development of additional standards.
The adoption of any future federal, state or local law or implementing regulation imposing permitting or reporting obligations on, or otherwise limiting, the hydraulic fracturing process, or the discovery of groundwater contamination or other adverse environmental effects directly connected to hydraulic fracturing, could make it more difficult and more expensive to complete crude oil and natural gas wells in low-permeability formations and increase our costs of compliance and doing business, as well as delay, prevent or prohibit the development of natural resources from unconventional formations. In the event regulations are adopted to prohibit or significantly limit the use of hydraulic fracturing in states in which we operate, it would have a material adverse effect on our ability to economically find and develop crude oil and natural gas reserves in our strategic plays. The inability to achieve a satisfactory economic return could cause us to curtail or discontinue our exploration and development plans, which would have a material adverse effect on our business, financial condition, results of operations and cash flows.

Future legislation may impose new taxes on crude oil or natural gas activities, including eliminating or reducing certain federal income tax deductions currently available with respect to crude oil and natural gas exploration and development.
In previous years, legislation has been proposed to eliminate or defer certain key U.S. federal income tax deductions historically available to oil and gas exploration and production companies. Such proposed changes have included: (i) a repeal of the percentage depletion allowance for crude oil and natural gas properties; (ii) the elimination of deductions for intangible drilling and exploration and development costs; (iii) the elimination of the deduction for certain production activities; and (iv) an extension of the amortization period for certain geological and geophysical expenditures. These tax deductions currently utilized within our industry were not impacted by the Tax Cuts and Jobs Act signed into law in the United States in December 2017. However, no prediction can be made as to whether any legislative changes will be proposed or enacted in the future that could eliminate or defer these or other tax deductions utilized within our industry. Any such changes could adversely affect our business, financial condition, results of operations and cash flows.
We are involved in legal proceedings thatA cyber incident could result in substantial liabilities.information theft, data corruption, operational disruption, and/or financial loss.
LikeOur business and industry has become increasingly dependent on digital technologies to conduct day-to-day operations including certain exploration, development and production activities. We rely heavily on digital technologies, including information systems and related infrastructure as well as cloud applications and services, to process and record financial and operating data; analyze seismic, drilling, completion and production information; manage production equipment; conduct reservoir modeling and reserves estimation; communicate with employees and business associates; perform compliance reporting and many other similarly-situated oilactivities. The availability and gas companies, weintegrity of these systems are from timeessential for us to time, involvedconduct our operations. Our business associates, including employees, vendors, service providers, financial institutions, and transporters, processors, and purchasers of our production are also heavily dependent on digital technology.
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As dependence on digital technologies has increased, cyber incidents, including deliberate attacks or unintentional events, have also increased. Our technologies, systems, networks, and those of our business associates have been and continue to be the target of cyber attacks or information security breaches, which could lead to disruptions in various legal proceedingscritical systems, unauthorized release or theft of confidential or protected information, corruption of data or other disruptions of our business operations. In addition, certain cyber incidents, such as surveillance of our systems and those of our business associates, may remain undetected for an extended period.
A cyber attack involving our information systems and related infrastructure, and/or that of our business associates, could disrupt our business and negatively impact our operations in the ordinary coursea variety of businessways, including but not limited to commercial disputes, claimsunauthorized access to, or theft of, sensitive or proprietary information and data corruption or operational disruption that adversely affects our ability to carry on our business. Any such event could damage our reputation and lead to financial losses from royalty and surface owners, property damage claims, personal injury claims, regulatory compliance matters, disputes with tax authorities, and other matters. The outcomeremedial actions, loss of such legal matters often cannot be predicted with certainty. We vigorously defend ourselves in all such matters. However, if our efforts to defend ourselves are not successful, it is possible the outcome of onebusiness, or more such proceedings could result in substantialpotential liability, penalties, sanctions, judgments, consent decrees, or orders requiring a change in our business


practices, which could have a material adverse effect on our business, financial condition, results of operations andor cash flows. Judgments
While the Company has established cyber security systems and estimatescontrols, disclosure controls and procedures and incident response protocols, these systems, controls, procedures and protocols may not identify all risks and threats we face, or may fail to determine accruals relatedprotect data or mitigate the adverse effects of data loss. To our knowledge we have not experienced any material losses relating to cyber attacks; however, there can be no assurance that we will not suffer material losses in the future either as a result of a breach of our systems or those of our business associates. As cyber threats continue to evolve, we may be required to expend significant additional resources to continue to modify or enhance our protective measures or to investigate and remediate any information security vulnerabilities. Additionally, the growth of cyber attacks has resulted in evolving legal and other proceedings could change from periodcompliance matters which may impose significant costs that are likely to period, and such changes could be material.increase over time.
Competition in the crude oil and natural gas industry is intense, making it more difficult for us to acquire properties, market crude oil and natural gas and secure trained personnel.
Our ability to acquire additional prospects and find and develop reserves in the future will depend on our ability to evaluate and select suitable properties and to consummate transactions in a highly competitive environment for acquiring properties, securing long-term transportation and processing capacity, marketing crude oil and natural gas, and securing trained personnel. Also, there is substantial competition for capital available for investment in the crude oil and natural gas industry. Our competitors may possess and employ financial, technical and personnel resources greater than ours. Those companies may be able to pay more for productive crude oil and natural gas properties and exploratory prospects and to evaluate, bid for and purchase a greater number of properties and prospects than our financial or personnel resources permit. In addition, our competitors may be ableOur inability to offer better compensation packages to attract and retain qualified personnel than we are able to offer. We may not be able toeffectively compete successfully in the future in acquiring prospective reserves, developing reserves, securing long-term transportation and processing capacity, marketing hydrocarbons, attracting and retaining quality personnel, and raising additional capital, whichthis environment could have a material adverse effect on our financial condition, results of operations and cash flows.
Negative public perception regarding us and/or our industry could have an adverse effect on our operations.
Negative public perception regarding us and/or our industry resulting from, among other things, concerns about hydraulic fracturing, oil spills, induced seismicity, and greenhouse gas emissions may lead to increased regulatory scrutiny, which may, in turn, lead to new state and federal safety and environmental laws, regulations, guidelines and enforcement interpretations or a reduction in demand for our products. These actions may cause operational delays or restrictions, increased operating costs, additional regulatory burdens and increased risk of litigation. Moreover, governmental authorities exercise considerable discretion in the timing and scope of permit issuance and the public may engage in the permitting process, including through intervention in the courts. Negative public perception could cause the permits we or third party service providers need to conduct operations to be withheld, delayed, or burdened by requirements that restrict our ability to conduct our business.
Energy conservation measures or initiatives that stimulate demand for alternative forms of energy could reduce the demand for the crude oil and natural gas we produce.
Fuel conservation measures, climate change initiatives, governmental requirements for renewable energy resources, increasing consumer demand for alternative forms of energy, and technological advances in fuel economy and energy generation devices could reduce demand for the crude oil and natural gas we produce. The potential impact of changing demand for crude oil and natural gas services and products may have a material adverse effect on our business, financial condition, results of operations and cash flows.
Severe weather events and natural disasters could have a material adverse effect on our business, financial condition, results of operations and cash flows.
Severe weather events and natural disasters such as hurricanes, tornadoes, seismic events, floods, blizzards, extreme cold, drought, and ice storms affecting the areas in which we operate, including our corporate headquarters, could have a material adverse effect on our operations or the operations of third party service providers. Such events may result in significant destruction of infrastructure, businesses, and homes and could disrupt the distribution and supply of crude oil and natural gas products in the impacted regions. The consequences of such events may include the evacuation of personnel; damage to and disruption of drilling rigs or transportation, processing, storage, refining, and export facilities; the shut-in of production resulting from an inability to transport crude oil or natural gas products to market centers and other factors; an inability to access well sites; destruction of information and communication systems; and the disruption of administrative and management processes, any of which could hinder our ability to conduct normal operations and could adversely affect our business, financial condition, results of operations or cash flows.

Terrorist activities could materially and adversely affect our business and results of operations.

Terrorist attacks and the threat of terrorist attacks, whether domestic or foreign attacks, as well as military or other actions taken in response to these acts, could cause instability in the global financial and energy markets. Continued hostilities abroad and the occurrence or threat of terrorist attacks in the United States or other countries could adversely affect the global economy in unpredictable ways, including the disruption of energy supplies and markets, increased volatility in commodity prices or the possibility that infrastructure we rely on could be a direct target or an indirect casualty of an act of terrorism. Any of these events could materially and adversely affect our business and results of operations.
Regulations under the Dodd-Frank Act regarding derivativesFinancial Risks
Our derivative activities could have anresult in financial losses or reduce our earnings.
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To achieve more predictable cash flows and reduce our exposure to adverse effect on our ability to use derivative instruments to reduce the effect offluctuations in commodity price risk and other risks associated with our business.
Fromprices, from time to time we may useenter into derivative instruments for a potentially significant portion of our production. See Part II, Item 8. Notes to manageConsolidated Financial Statements—Note 5. Derivative Instruments for a summary of our commodity price risk. In 2010, the U.S. Congress adopted the Dodd-Frank Act, which, among other provisions, established federal oversightderivative positions as of December 31, 2020. Additionally, see Part II, Item 7. Management’s Discussion and regulationAnalysis of the over-the-counter derivatives marketFinancial Condition and required the Commodity Futures Trading CommissionResults of Operations—Derivative Instruments for a summary of additional derivative instruments entered into subsequent to promulgate a range of rules and regulations applicable to derivative transactions. If weDecember 31, 2020. We do not qualifydesignate our derivative instruments as hedges for an end user exemption fromaccounting purposes and we record all derivatives on our balance sheet at fair value. Changes in the Dodd-Frank Act requirements, the new regulations could increase the cost of derivative contracts, reduce the availabilityfair value of derivatives to protect against risks we encounter, reduceare recognized in earnings. Accordingly, our ability to monetize or restructure existing derivative contracts, lead to fewer potential counterparties, and increase our exposure to less creditworthy counterparties, any of which could limit our desire and ability to implement commodity price risk management strategies. If our use of derivatives becomes limitedearnings may fluctuate materially as a result of changes in commodity prices and resulting changes in the regulations,fair value of any outstanding derivatives.
Derivative instruments expose us to the risk of financial loss in certain circumstances, including when:
production is less than the volume covered by the derivative instruments;
the counterparty to the derivative instrument defaults on its contractual obligations; or
there is an increase in the differential between the underlying price in the derivative instrument and actual prices received.
In addition, derivative arrangements limit the benefit we would otherwise receive from increases in commodity prices. Our decision on the quantity and price at which we choose to hedge our resultsfuture production is based in part on our view of operations may become more volatilecurrent and future market conditions and our desire to stabilize cash flows may be less predictable. While certain Dodd-Frank Act regulations are already in effect, certain aspectsnecessary for the development of the rulemaking have been repealed or have not been finalized and the ultimate effect of the regulations on our business remains uncertain.
The loss of senior management or technical personnel could adversely affect our operations.
We depend on the services of our senior management and technical personnel. The loss of the services of our senior management or technical personnel, including Harold G. Hamm, our Chairman and Chief Executive Officer, could have a material adverse effect on our operations. We do not maintain, nor do we plan to obtain, any insurance against the loss of any of these individuals.
We have limited control over the activities on properties we do not operate.
Some of the properties in which we have an ownership interest are operated by other companies and involve third-party working interest owners. As of December 31, 2018, non-operated properties represented 19% of our estimated proved developed reserves, 12% of our estimated proved undeveloped reserves, and 15% of our estimated total proved reserves. We have limited abilitymay choose not to influence or controlhedge future production if the operations or future developmentpricing environment for certain time periods is deemed to be unfavorable. Additionally, we may choose to liquidate derivative positions prior to the expiration of non-operated properties, including the marketing of oil and gas production, compliance with environmental, safety and other regulations, or the amount of expenditures required to fund the development and operation of such properties. Moreover, we are dependent on other working interest owners on these projects to fund their contractual sharematurities in order to monetize gain positions for the purpose of funding our capital and operating expenditures. These limitations and our dependence on the operators andprogram or other working interest owners for these projects could cause us to incur unexpected future costs and could have a material adverse effect on our business financial condition, results of operations and cash flows.opportunities.
Our revolving credit facility and indentures for our senior notes contain certain covenants and restrictions that may inhibit our ability to make certain investments, incur additional indebtedness and engage in certain other transactions, which could adversely affect our ability to meet our goals.
Our revolving credit facility contains restrictive covenants that may limit our ability to, among other things, incur additional indebtedness, incur liens, engage in sale and leaseback transactions, and merge, consolidate or sell all or substantially all of our assets. Our revolving credit facility also contains a requirement that we maintain a consolidated net debt to total capitalization ratio of no greater than 0.65 to 1.00. This ratio represents the ratio of net debt (calculated as total face value of debt plus outstanding letters of credit less cash and cash equivalents) divided by the sum of net debt plus total shareholders’ equity plus, to the extent resulting in a reduction of total shareholders’ equity, the amount of any non-cash impairment charges incurred, net of any tax effect, after June 30, 2014.
At December 31, 2018,2020, we had no$160 million of outstanding borrowings on our credit facility and our consolidated net debt to total capitalization ratio, as defined, was 0.430.42 to 1.00. Our total debt would need to independently increase by approximately $8.1 billion above the existing level at December 31, 2018 (with no corresponding increase in cash or reduction in refinanced debt) to reach the maximum covenant ratio of 0.65 to 1.00. Alternatively, our total shareholders’ equity would need to independently decrease by approximately $4.3 billion below the existing level at December 31, 2018 (excluding the after-tax impact of any non-cash impairment charges) to reach the maximum covenant ratio.
The indentures governing our senior notes contain covenants that, among other things, limit our ability to create liens securing certain indebtedness, enter into certain sale and leaseback transactions, and consolidate, merge or transfer certain assets.
The covenants in our revolving credit facility and senior note indentures may restrict our ability to expand or pursue our business strategies. Our ability to comply with the provisions of our revolving credit facility or senior note indentures may be impacted by changes in economic or business conditions, results of operations, or events beyond our control. The breach of any covenant could result in a default under our revolving credit facility or senior note indentures, in which case, depending on the actions taken by the lenders or trustees thereunder or their successors or assignees, could result in all amounts outstanding


thereunder, together with accrued interest, to be due and payable. If our indebtedness is accelerated, our assets may not be sufficient to repay in full such indebtedness, which would have a material adverse effect our business, financial condition, results of operations, and cash flows.
A cyber incident could result in information theft, data corruption, operational disruption, and/or financial loss.
Our business and industry has become increasingly dependent on digital technologies to conduct day-to-day operations including certain exploration, development and production activities. We rely heavily on digital technologies, including information systems and related infrastructure as well as cloud applications and services, to process and record financial and operating data; analyze seismic, drilling, completion and production information; manage production equipment; conduct reservoir modeling and reserves estimation; communicate with employees and business associates; perform compliance reporting and many other activities. The availability and integrity of these systems are essential for us to conduct our operations. Our business associates, including employees, vendors, service providers, financial institutions, and transporters, processors, and purchasers of our production are also heavily dependent on digital technology.
As dependence on digital technologies has increased, cyber incidents, including deliberate attacks or unintentional events, have also increased. Our technologies, systems, networks, and those of our business associates have been and continue to be the target of cyber attacks or information security breaches, which could lead to disruptions in critical systems, unauthorized release or theft of confidential or protected information, corruption of data or other disruptions of our business operations. In addition, certain cyber incidents, such as surveillance of our systems and those of our business associates, may remain undetected for an extended period.
A cyber attack involving our information systems and related infrastructure, and/or that of our business associates, could disrupt our business and negatively impact our operations in a variety of ways, including but not limited to:
unauthorized access to or theft of seismic data, reserves information, strategic information, or other sensitive or proprietary information owned by us or by third parties could have a negative impact on our ability to compete for oil and gas resources;
data corruption, communication interruption, or other operational disruption during drilling activities could result in failure to reach the intended target or a drilling incident;
data corruption or operational disruption of production-related infrastructure could result in a loss of production or accidental discharge;
a cyber attack on third party transportation, processing, storage, refining, or export facilities could delay or prevent us from transporting and marketing our production, resulting in a loss of revenues;
a cyber attack on a vendor or service provider could result in supply chain disruptions which could delay or halt our major development projects;
a cyber attack involving commodity exchanges or financial institutions could slow or halt commodities trading, thus preventing us from marketing our production or engaging in hedging activities, resulting in a loss of revenues;
corruption of our financial or operating data could result in events of non-compliance which could lead to regulatory fines or penalties; and
a cyber attack could result in unauthorized access to and release of personal or confidential information maintained by the Company.
Any of the above events could damage our reputation and lead to financial losses from remedial actions, loss of business, or potential liability, which could have a material adverse effect on our business, financial condition, results of operations or cash flows.
The Company has established cyber security systems and controls intended to monitor threats, identify incidents and assess their impact, protect information, and mitigate data loss. The Company has also established disclosure controls and procedures in tandem with incident response protocols, including regular assessment of threats and incidents by a security oversight committee comprised of members of senior management and information technology personnel. These systems, controls, and procedures are intended to provide information about cyber security incidents so that such information can be timely processed and reported to the appropriate personnel; however, these systems, controls, and procedures may not identify all risks and threats we face, or may fail to protect data or mitigate the adverse effects of data loss. Our senior management makes materiality assessments and disclosure decisions and has implemented procedures to prohibit insider trading on the basis of material nonpublic information about cyber incidents; however, we cannot guarantee all of these efforts will be effective. Although we maintain systems, controls, and procedures to address cyber security risks, such measures cannot eliminate cyber


security threats and incidents, and there remains a risk that we will experience a cyber breach, attack, or data loss incident and suffer adverse effects.
To our knowledge we have not experienced any material losses relating to cyber attacks; however, there can be no assurance that we will not suffer material losses in the future either as a result of a breach of our systems or those of our business associates. As cyber threats continue to evolve, we may be required to expend significant additional resources to continue to modify or enhance our protective measures or to investigate and remediate any information security vulnerabilities. Additionally, the growth of cyber attacks has resulted in evolving legal and compliance matters which may impose significant costs that are likely to increase over time.
Increases in interest rates could adversely affect our business.
The U.S. Federal Reserve increased the benchmark federal funds interest rate on four separate occasions in 2018 and is forecasting additional increases in 2019. Our business and operating results can be adversely affected by increases in interest rates, the availability, terms of and cost of capital, or downgrades or other negative rating actions with respect to our credit rating. These factors could cause our cost of doing business to increase, limit our ability to pursue acquisition, disposition, or joint development opportunities, reduce cash flows used for drilling and completion activities, and place us at a competitive disadvantage. A significant reduction in cash flows from operations or the availability of credit could materially and adversely affect our financial condition and results of operations.
Financial regulators are working to transition away from the London Interbank Offered Rate (“LIBOR”) as a reference rate for financial contracts by the end of 2021 and to develop benchmarks to replace LIBOR. Certain types of borrowings under our revolving credit facility, which matures in April 2023, are derived from the LIBOR reference rate. Our revolving credit agreement includes general provisions governing the establishment of an alternate rate of interest to the LIBOR-based rate that gives consideration to the then prevailing market convention for determining a rate of interest for comparable syndicated loans. At this time, the impact on the Company's borrowing costs, if any, under an alternative reference rate scenario is uncertain.
The inability of joint interest owners, derivative counterparties, significant customers, and service providers to meet their obligations to us may adversely affect our financial results.
Our principal exposure to credit risk is through the sale of our crude oil and natural gas production, which we market to energy marketing companies, crude oil refining companies, and natural gas gathering and processing companies ($644561 million in receivables at December 31, 2018);2020) and our joint interest and other receivables ($368144 million at December 31, 2018); and counterparty credit risk associated with our derivative instrument receivables ($16 million at December 31, 2018)2020). These counterparties may experience insolvency or liquidity issues and may not be able to meet their obligations and liabilities owed to us, particularly during a period of depressed commodity prices. Defaults by these counterparties could adversely impact our financial condition and results of operations.
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Additionally, we rely on field service companies and midstream companies for services associated with the drilling and completion of wells and for certain midstream services. A worsening of the commodity price environment may result in a material adverse impact on the liquidity and financial position of the parties with whom we do business, resulting in delays in payment of, or non-payment of, amounts owed to us, delays in operations, loss of access to equipment and facilities and similar impacts. These events could have an adverse impact on our business, financial condition, results of operations and cash flows.
Legal and Regulatory Risks
Laws, regulations, guidance, executive actions or other regulatory initiatives regarding environmental protection and occupational safety and health could increase our costs of doing business and result in operating restrictions, delays, or cancellations in the drilling and completion of crude oil and natural gas wells, which could have a material adverse effect on our business, results of operations, financial condition and cash flows.
Our derivative activitiescrude oil and natural gas exploration and production operations are subject to stringent federal, state and local legal requirements governing environmental protection and occupational safety and health. These requirements may take the form of laws, regulations, executive actions and various other legal initiatives. See Part I, Item 1. Business—Regulation of the Crude Oil and Natural Gas Industry for a discussion of those environmental and occupational safety and health legal requirements that govern us, including with respect to air emissions, including natural gas flaring limitations and ozone standards; climate change, including restriction of methane or other greenhouse gas emissions and suspensions of new leasing and permitting on federal lands and waters; elimination of subsidies for the oil and gas sector; hydraulic fracturing; waste water disposal regulatory developments; occupational safety standards, and other risks or regulations relating to environmental protection. One or more of these legal requirements could have a material adverse effect on our business, financial condition, results of operations, and cash flows.
We are subject to certain complex federal, state and local laws and regulations in areas other than environmental protection and occupational safety and health that could result in increased costs, operating restrictions or delays, limitations or prohibitions on our ability to develop and produce reserves, or expose us to significant liabilities.
Our crude oil and natural gas exploration and production operations are subject to complex and stringent federal, state and local laws and regulations in areas other than environmental protection and occupational safety and health, including with respect to production, sales and transport of crude oil, NGLs and natural gas, and employees and labor relations. Following is a discussion of certain significant laws, rules and regulations that affect us in these areas in which we operate. See Part I, Item 1. Business—Regulation of the Crude Oil and Natural Gas Industry for further discussion of the regulations that affect us.
Taxation of oil and gas activities—In previous years, legislation has been proposed to eliminate or defer certain key U.S. federal income tax deductions historically available to oil and gas exploration and production companies. Such proposed changes have included: (i) a repeal of the percentage depletion allowance for crude oil and natural gas properties; (ii) the elimination of deductions for intangible drilling and exploration and development costs; (iii) the elimination of the deduction for certain production activities; and (iv) an extension of the amortization period for certain geological and geophysical expenditures. With President Biden taking office and the control of Congress shifting in January 2021, there is an increased risk of the enactment of legislation that alters, eliminates, or defers these or other tax deductions utilized within our industry, which could adversely affect our business, financial losses orcondition, results of operations and cash flows.
Dodd-Frank Act derivative regulations—In 2010, the U.S. Congress adopted the Dodd-Frank Act, which, among other provisions, established federal oversight and regulation of the over-the-counter derivatives market. If we do not qualify for an end user exemption from the Dodd-Frank Act requirements, the regulations could increase the cost of derivative contracts, reduce the availability of derivatives to protect against risks we encounter, reduce our earnings.
To achieve more predictable cash flowsability to monetize or restructure existing derivative contracts, lead to fewer potential counterparties, and reduceincrease our exposure to less creditworthy counterparties, any of which could limit our desire and ability to implement commodity price risk management strategies. Certain other regulations, including regulations related to capital requirements, which are yet to be implemented, may have an effect that results in the reduction of the number of products and counterparties in the over-the-counter derivatives market available to us and could result in significant additional costs being passed through to us. If our use of derivatives becomes limited as a result of the regulations, our results of operations may become more volatile and our cash flows may be less predictable. Aspects of the Dodd-Frank rulemaking have been finalized in certain areas, but other areas have not been finalized or implemented and the ultimate effect of these regulations on our business remains uncertain.
Failure to comply with the above and other laws and regulations may trigger a variety of administrative, civil and criminal enforcement investigations or actions, including investigatory actions, the assessment of monetary penalties, the imposition of remedial requirements, the issuance of orders or judgments limiting or enjoining future operations, criminal sanctions, or litigation. Moreover, changes to existing laws or regulations or changes in interpretations of laws and regulations may
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unfavorably impact us or the infrastructure used for transporting our products. Similarly, changes in regulatory policies and priorities, including those in response to the January 2021 change in U.S. presidential administrations and shift in control of Congress, could result in the imposition of new laws or regulations that adversely impact us or our industry. Any such changes could increase our operating costs, delay our operations or otherwise alter the way we conduct our business, which could have a material adverse fluctuationseffect on our financial condition, results of operations and cash flows.
Climate change activism, energy conservation measures, or initiatives that stimulate demand for alternative forms of energy could reduce the demand for the crude oil and natural gas we produce.
Climate change activism, fuel conservation measures, governmental requirements for renewable energy resources, increasing consumer demand for alternative forms of energy, and technological advances in commodity prices,fuel economy and energy generation devices may create new competitive conditions that result in reduced demand for the crude oil and natural gas we produce. The potential impact of changing demand for crude oil and natural gas services and products may have a material adverse effect on our business, financial condition, results of operations and cash flows. See Part I, Item 1. Business—Regulation of the Crude Oil and Natural Gas Industry for further discussion relating to climate change and emission of greenhouse gases, climate change activism, energy conservation measures or initiatives that stimulate demand for alternative forms of energy. One or more of these developments could have an adverse effect on our assets and operations.
We are involved in legal proceedings that could result in substantial liabilities.
Like other similarly-situated oil and gas companies, we are, from time to time, involved in various legal proceedings in the ordinary course of business including, but not limited to, commercial disputes, claims from royalty and surface owners, property damage claims, personal injury claims, regulatory compliance matters, disputes with tax authorities, and other matters. The outcome of such legal matters often cannot be predicted with certainty. We vigorously defend ourselves in all such matters. However, if our efforts to defend ourselves are not successful, it is possible the outcome of one or more such proceedings could result in substantial liability, penalties, sanctions, judgments, consent decrees, or orders requiring a change in our business practices, which could have a material adverse on our business, financial condition, results of operations and cash flows. Judgments and estimates to determine accruals related to legal and other proceedings could change from period to period, and such changes could be material.

Increasing attention to environmental, social, and corporate governance matters may impact our business.
Companies across all industries are facing increasing scrutiny from stakeholders related to their environmental, social, and corporate governance (“ESG”) practices. These standards are evolving and if we are perceived to have not responded appropriately to certain standards, regardless of whether there is a legal requirement to do so, we may enter into derivative instrumentssuffer from reputational damage and our business, financial condition, and/or stock price could be materially and adversely affected. Increasing attention to climate change, increasing societal expectations on companies to address climate change, and potential consumer use of alternative forms of energy may result in increased costs, reduced demand for a potentially significant portion of our production. See Part II, Item 8. Notes to Consolidated Financial Statements—Note 5. Derivative Instruments for a summary of our commodity derivative positions as of December 31, 2018. We do not designate any of our derivative instruments as hedges for accounting purposeshydrocarbon products, reduced profits, increased investigations and we record all derivativeslitigation, and negative impacts on our balance sheet at fair value. Changes in the fair value ofstock price, our derivatives are recognized in current period earnings. Accordingly,ability to recruit necessary talent, and our earnings may fluctuate materially as a result of changes in commodity prices and resulting changes in the fair value of our derivatives.
Derivative instruments expose usaccess to the risk of financial loss in certain circumstances, including when:
production is less than the volume covered by the derivative instruments;
the counterparty to the derivative instrument defaults on its contractual obligations; or
there is an increase in the differential between the underlying price in the derivative instrument and actual prices received.


capital markets.
In addition, our derivative arrangements limitorganizations that provide information to investors on corporate governance and related matters have developed ratings processes for evaluating companies on their approach to ESG matters. Currently, there are no universal standards for such scores or ratings and, in fact, different standards focus, to varying degrees, on different attributes of environmental, social, and corporate governance matters. This disparity between the benefit we would otherwise receive from increases“standards” may result in commodity prices. Our decisioninvestors focusing on inadequate or improper metrics which may lead to a misperception of a company and its ESG practices. Nonetheless, the quantityimportance of sustainability evaluations is becoming more broadly accepted by investors and price at which we chooseshareholders. ESG ratings are used by some investors to hedge our future production,inform their investment and voting decisions. Additionally, certain investors use these scores to benchmark companies against their peers, and if any,a company is basedperceived as lagging, these investors may engage with companies to require improved ESG disclosure or performance. Moreover, certain members of the broader investment community may consider a company’s sustainability score as a reputational or other factor in part on our view of current and future market conditions and our desire to stabilize cash flows necessary for the developmentmaking an investment decision. Consequently, a low sustainability score could result in exclusion of our proved reserves. We may choose notstock from consideration by certain investment funds, engagement by investors seeking to hedge future production if the pricing environment for certain time periods is deemed to be unfavorable. Additionally, we may choose to liquidate existing derivative positions prior to the expiration of their contractual maturities in order to monetize gain positions for the purpose of funding our capital program.
We have hedged the majorityimprove such scores and a negative perception of our forecasted 2019 natural gas production. Our future crude oil production is currently unhedged and directly exposedoperations by certain investors.
Risks Related to continued volatility in market prices, whether favorable or unfavorable.our Corporate Structure
Our Chairman and Chief Executive OfficerChairman beneficially owns approximately 76%81% of our outstanding common stock, giving him influence and control in corporate transactions and other matters, including a sale of our Company.
As of December 31, 2018,2020, Harold G. Hamm, our Chairman and Chief Executive Officer,Chairman, beneficially owned approximately76% 81% of our outstanding common shares. As a result, Mr. Hamm has control over our Company and will continue to be able to control the
37


election of our directors, determine our corporate and management policies and determine, without the consent of our other shareholders, the outcome of certain corporate transactions or other matters submitted to our shareholders for approval, including potential mergers or acquisitions, asset sales and other significant corporate transactions. Therefore, Mr. Hamm could cause, delay or prevent a change of control of our Company. The interests of Mr. Hamm may not coincide with the interests of other holders of our common stock.
We have historically entered into, and may enter into, transactions from time to time with companies or persons affiliated with Mr. Hamm if, after an independent review by our Audit Committee or by the independent members of our Board of Directors, it is determined such transactions are in the Company’s best interests and are on terms no less favorable to us than could be achieved with an unaffiliated third party. These transactions may result in conflicts of interest between Mr. Hamm’s affiliated parties and us.
We have been an early entrant into new or emerging plays. As a result, our drilling results in these areas are uncertain, and the value of our undeveloped acreage will decline if drilling results are unsuccessful.
While our costs to acquire undeveloped acreage in new or emerging plays have generally been less than those of later entrants into a developing play, our drilling results in new or emerging areas are more uncertain than drilling results in developed and producing areas. Since new or emerging plays have limited or no production history, we are unable to use past drilling results in those areas to help predict our future drilling results. As a result, our cost of drilling, completing and operating wells in these areas may be higher than initially expected, and the value of our undeveloped acreage in the emerging areas will decline if drilling results are unsuccessful.
We may be subject to risks in connection with acquisitions, divestitures, and joint development arrangements.
As part of our business strategy, we have made and will likely continue to make acquisitions of oil and gas properties, divest of assets, and enter into joint development arrangements. Suitable acquisition properties, buyers of our assets, or joint development counterparties may not be available on terms and conditions we find acceptable or not at all.
The successful acquisition of producing properties requires an assessment of several factors, including but not limited to:
recoverable reserves;
future crude oil and natural gas prices and location and quality differentials;
the quality of the title to acquired properties;
future development costs, operating costs and property taxes; and
potential environmental and other liabilities.
The accuracy of these acquisition assessments is inherently uncertain. In connection with these assessments, we perform a review, which we believe to be generally consistent with industry practices, of the subject properties. Our review will not reveal all existing or potential problems nor will it permit us to become sufficiently familiar with the properties to fully assess their deficiencies and capabilities prior to acquisition. Inspections may not always be performed on every property, and environmental problems are not necessarily observable even when an inspection is undertaken. Even when problems are identified, the seller of the subject properties may be unwilling or unable to provide effective contractual protection against all or part of the problems. We sometimes are not entitled to contractual indemnification for environmental liabilities and acquire properties on an “as is” basis.


In addition, from time to time we may sell or otherwise dispose of certain assets as a result of an evaluation of our asset portfolio or to provide cash flow for use in reducing debt and enhancing liquidity. Such divestitures have inherent risks, including possible delays in closing, the risk of lower-than-expected sales proceeds for the disposed assets, and potential post-closing adjustments and claims for indemnification. Additionally, volatility and unpredictability in commodity prices may result in fewer potential bidders, unsuccessful sales efforts, and a higher risk that buyers may seek to terminate a transaction prior to closing. The occurrence of any of the matters described above could have an adverse impact on our business, financial condition, results of operations and cash flows.
Terrorist activities could materially and adversely affect our business and results of operations.
Terrorist attacks and the threat of terrorist attacks, whether domestic or foreign attacks, as well as military or other actions taken in response to these acts, could cause instability in the global financial and energy markets. Continued hostilities abroad and the occurrence or threat of terrorist attacks in the United States or other countries could adversely affect the global economy in unpredictable ways, including the disruption of energy supplies and markets, increased volatility in commodity prices or the possibility that infrastructure we rely on could be a direct target or an indirect casualty of an act of terrorism. Any of these events could materially and adversely affect our business and results of operations.

Item 1B.    Unresolved Staff Comments
There were no unresolved Securities and Exchange Commission staff comments at December 31, 2018.2020.
 
Item 2.Properties
Item 2.    Properties
The information required by Item 2 is contained in Part I, Item 1. Business—Crude Oil and Natural Gas Operations and Part II, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations—Delivery Commitments and is incorporated herein by reference.


Item 3.Legal Proceedings
See Note 11. CommitmentsItem 3.    Legal Proceedings
On April 15, 2020, Casillas Petroleum Resource Partners II, LLC filed a petition against the Company in the District Court of Tulsa County, State of Oklahoma alleging the Company breached a Purchase and Contingencies–LitigationSale Agreement (“PSA”) to purchase oil and gas interests in Part II, Item 8. Financial StatementsOklahoma for $200 million. The Company asserted the PSA was terminated due to Casillas’ breach of the PSA and Supplementary Data–Notesdenied the allegations. On October 16, 2020, the parties entered into a settlement agreement to Consolidated Financial Statementsamend and supplement the terms of the PSA, close on the transaction contemplated by the PSA for a discussion ofnegotiated amount, and settle all disputes involved in the legal matter involvinglitigation or that could have been raised in the Company, Billy J. Strack and Daniela A. Renner, which is incorporated herein by reference.litigation. The parties subsequently dismissed their respective claims in the litigation.


Item 4.Mine Safety Disclosures
Item 4.    Mine Safety Disclosures
Not applicable.

38



Part II
 
Item 5.Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities
Item 5.    Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities
Our common stock is listed on the New York Stock Exchange and trades under the symbol “CLR.” As of January 31, 2019,29, 2021, the number of record holders of our common stock was 1,234. Management believes,1,223. On January 29, 2021, after inquiry, management believes that the number of beneficial owners of our common stock is approximately 71,370.55,192. On January 31, 2019,29, 2021, the last reported sales price of our common stock, as reported on the New York Stock Exchange, was $46.17$19.69 per share.
In May 2019, our Board of Directors approved the initiation of a dividend payment program and on June 3, 2019 the Company announced its first quarterly cash dividend of $0.05 per share, which was paid on November 21, 2019. On January 27, 2020 our Board of Directors approved a cash dividend of $0.05 per share for the first quarter of 2020, which was paid on February 21, 2020. To preserve cash in response to the significant reduction in crude oil prices and economic uncertainty resulting from the COVID-19 pandemic, in April 2020 the Company's quarterly dividend was suspended by the Board of Directors. Any payment of future dividends will be at the discretion of our Board of Directors and will depend on, among other things, our future earnings, financial condition, cash flows, capital requirements, levels of indebtedness, prevailing business conditions and other considerations our Board of Directors may deem relevant.
The following table summarizes ourprovides information about purchases of our common stock during the quarter ended December 31, 2018:2020:
Period Total number of
shares purchased (1)
 Average
price paid
per share (2)
 Total number of shares
purchased as part of
publicly announced
plans or programs
 Maximum number of
shares that may yet be
purchased under the
plans or programs
October 1, 2018 to October 31, 2018 785
 $52.68
 
 
November 1, 2018 to November 30, 2018 11,389

$48.00
 
 
December 1, 2018 to December 31, 2018 


 
 
Total 12,174
 $48.30
 
 
PeriodTotal number of shares purchasedAverage price paid per shareTotal number of shares purchased as part of publicly announced plans or programs (1)Maximum dollar value of shares that may yet be purchased under the plans or programs (in millions) (1)
October 1, 2020 to October 31, 2020
Repurchases for tax withholdings (2)9,292 $12.40 — — 
November 1, 2020 to November 30, 2020
Repurchases for tax withholdings (2)11,297 $14.06 — — 
December 1, 2020 to December 31, 2020
Repurchases for tax withholdings (2)— $— — — 
Total for the quarter20,589 $— — — 
 
(1)In connection with restricted stock grants under the Company’s 2013 Long-Term Incentive Plan (“2013 Plan”), we adopted a policy that enables employees to surrender shares to cover their tax liability. Shares indicated as having been purchased in the table above represent shares surrendered by employees to cover tax liabilities. We paid the associated taxes to the applicable taxing authorities.
(2)The price paid per share was the closing price of our common stock on the date the restrictions lapsed on such shares.
(1)In May 2019 our Board of Directors approved the initiation of a share repurchase program to acquire up to $1 billion of our common stock beginning in June 2019 at times and levels deemed appropriate by management. The program was announced on June 3, 2019 and does not have a set expiration date. The share repurchase program may be modified, suspended, or terminated by our Board of Directors at any time. No share repurchases were made by the Company under the program during the three months ended December 31, 2020. The total dollar value of shares that may yet be purchased under the program totaled $682.9 million as of December 31, 2020.
(2)Amounts represent shares surrendered by employees to cover tax liabilities in connection with the vesting of restricted stock granted under the Company's 2013 Long-Term Incentive Plan. We paid the associated taxes to the applicable taxing authorities. The price paid per share was the closing price of our common stock on the date the restrictions lapsed on such shares.
Equity Compensation Plan Information
The following table sets forth the information as of December 31, 20182020 relating to equity compensation plans:
 
Number of Shares

to be Issued Upon

Exercise of

Outstanding

Options
Weighted-Average

Exercise Price of

Outstanding Options
Remaining Shares

Available for Future

Issuance Under Equity

Compensation Plans (1)
Equity Compensation Plans Approved by Shareholders

13,736,734
10,768,301
Equity Compensation Plans Not Approved by Shareholders


 
(1)Represents the remaining shares available for issuance under the 2013 Plan.

(1)Represents the remaining shares available for issuance under the 2013 Plan.

39


Performance Graph
The following graph compares our common stock performance with the performance of the Standard & Poor’s 500 Stock Index (“S&P 500 Index”) and the Dow Jones US Oil and Gas Index (“Dow Jones US O&G Index”) for the period of December 31, 20132015 through December 31, 2018.2020. The graph assumes the value of the investment in our common stock and in each index was $100 on December 31, 20132015 and that any dividends were reinvested. The stock performance shown on the graph below is not indicative of future price performance.
The information provided in this section is being furnished to, and not filed with, the SEC. As such, this information is neither subject to Regulation 14A or 14C nor to the liabilities of Section 18 of the Securities Exchange Act of 1934, as amended.
chart-55506f2e743f54a68ffa01.jpgclr-20201231_g4.jpg




40


Item 6.Selected Financial Data
Item 6.    Selected Financial Data
This section presents selected consolidated financial data for the years ended December 31, 20142016 through 2018.2020. The selected financial data presented below is not intended to replace our consolidated financial statements.
The following financial data has been derived from our audited consolidated financial statements for such periods. You should read the following selected financial data in connection with Part II, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations and our consolidated financial statements and related notes included elsewhere in this report. The selected consolidated results are not necessarily indicative of results to be expected in future periods. Operating and financial results attributable to noncontrolling interests are immaterialnot material relative to the Company's consolidated results and are not separately presented below.
  Year Ended December 31,
  2018 2017 2016 2015 2014
Income Statement data          
In thousands, except per share data  
Crude oil and natural gas sales (1) $4,678,722
 $2,982,966
 $2,026,958
 $2,552,531
 $4,203,022
Gain (loss) on crude oil and natural gas derivatives, net (2) (23,930) 91,647
 (71,859) 91,085
 559,759
Total revenues 4,709,586
 3,120,828
 1,980,273
 2,680,167
 4,801,618
Net income (loss) (3) 989,700
 789,447
 (399,679) (353,668) 977,341
Net income (loss) attributable to Continental Resources (3)(4) 988,317
 789,447
 (399,679) (353,668) 977,341
Net income (loss) per share attributable to Continental Resources: (3)(4)          
Basic $2.66
 $2.13
 $(1.08) $(0.96) $2.65
Diluted $2.64
 $2.11
 $(1.08) $(0.96) $2.64
Production volumes          
Crude oil (MBbl) 61,384
 50,536
 46,850
 53,517
 44,530
Natural gas (MMcf) 284,730
 228,159
 195,240
 164,454
 114,295
Crude oil equivalents (MBoe) 108,839
 88,562
 79,390
 80,926
 63,579
Average costs per unit          
Production expenses ($/Boe) $3.59
 $3.66
 $3.65
 $4.30
 $5.58
Production taxes (% of net oil and gas revenues) 7.9% 7.0% 7.0% 7.8% 8.2%
DD&A ($/Boe) $17.09
 $18.89
 $21.54
 $21.57
 $21.51
General and administrative expenses ($/Boe) $1.69
 $2.16
 $2.14
 $2.34
 $2.92
Proved reserves at December 31          
Crude oil (MBbl) 757,096
 640,949
 643,228
 700,514
 866,360
Natural gas (MMcf) 4,591,614
 4,140,281
 3,789,818
 3,151,786
 2,908,386
Crude oil equivalents (MBoe) 1,522,365
 1,330,995
 1,274,864
 1,225,811
 1,351,091
Other financial data (in thousands)          
Net cash provided by operating activities $3,456,008
 $2,079,106
 $1,125,919
 $1,857,101
 $3,355,715
Net cash used in investing activities $(2,860,172) $(1,808,845) $(532,965) $(3,046,247) $(4,587,399)
Net cash (used in) provided by financing activities $(356,934) $(243,034) $(587,773) $1,187,189
 $1,227,715
Total capital expenditures $2,928,746
 $2,035,254
 $1,110,256
 $2,564,301
 $5,015,595
Balance Sheet data at December 31 (in thousands)          
Total assets $15,297,947
 $14,199,651
 $13,811,776
 $14,919,808
 $15,076,033
Long-term debt, including current portion $5,768,349
 $6,353,691
 $6,579,916
 $7,117,788
 $5,928,878
Total equity $6,421,861
 $5,131,203
 $4,301,996
 $4,668,900
 $4,967,844
(1)
In years prior to 2018, we generally presented our revenues net of costs incurred to transport our production to market. For 2018, crude oil and natural gas sales are presented gross of certain transportation expenses as a result of our January 1, 2018 adoption of new revenue recognition and presentation rules as discussed in Part II, Item 8. Notes to Consolidated Financial Statements—Note 8. Revenues. We adopted the new rules using a modified retrospective transition approach whereby the rules were prospectively applied beginning January 1, 2018 and prior period results have not been adjusted to conform to the current presentation. The change in presentation resulted in an increase in revenues and a corresponding increase in separately reported transportation expenses, with no net effect on our results of operations, net income, or cash flows for 2018.
(2)Crude oil and natural gas derivative instruments are not designated as hedges for accounting purposes and, therefore, changes in the fair value of the instruments are shown separately from crude oil and natural gas sales. The year 2014 includes $433 million of gains recognized from crude oil derivative contracts that were settled in the fourth quarter of 2014 prior to their contractual maturities initially scheduled through December 2016.
(3)
Results for 2017 reflect the remeasurement of the Company's deferred income tax assets and liabilities in response to the enactment of the Tax Cuts and Jobs Act in December 2017, which resulted in a one-time increase in net income of approximately $713.7 million ($1.92 per basic share and $1.91 per diluted share). See Part II, Item 8. Notes to Consolidated Financial Statements—Note 9. Income

 Year Ended December 31,
 20202019201820172016
Income Statement data
In thousands, except per share data
Crude oil and natural gas sales (1)$2,555,434 $4,514,389 $4,678,722 $2,982,966 $2,026,958 
Gain (loss) on derivative instruments, net(14,658)49,083 (23,930)91,647 (71,859)
Total revenues2,586,470 4,631,947 4,709,586 3,120,828 1,980,273 
Net income (loss) (2)(605,561)774,473 989,700 789,447 (399,679)
Net income (loss) attributable to Continental Resources (2)(3)(596,869)775,641 988,317 789,447 (399,679)
Net income (loss) per share attributable to Continental Resources: (2)(3)
Basic$(1.65)$2.09 $2.66 $2.13 $(1.08)
Diluted$(1.65)$2.08 $2.64 $2.11 $(1.08)
Cash dividends per common share$0.05 $0.05 — — — 
Production volumes
Crude oil (MBbl)58,745 72,267 61,384 50,536 46,850 
Natural gas (MMcf)306,528 311,865 284,730 228,159 195,240 
Crude oil equivalents (MBoe)109,833 124,244 108,839 88,562 79,390 
Average costs per unit
Production expenses ($/Boe)$3.27 $3.58 $3.59 $3.66 $3.65 
Production taxes (% of net oil and gas revenues)8.2 %8.3 %7.9 %7.0 %7.0 %
DD&A ($/Boe)$17.12 $16.25 $17.09 $18.89 $21.54 
General and administrative expenses ($/Boe)$1.79 $1.57 $1.69 $2.16 $2.14 
Proved reserves at December 31
Crude oil (MBbl)496,975 760,187 757,096 640,949 643,228 
Natural gas (MMcf)3,640,724 5,154,471 4,591,614 4,140,281 3,789,818 
Crude oil equivalents (MBoe)1,103,762 1,619,265 1,522,365 1,330,995 1,274,864 
Other financial data (in thousands)
Net cash provided by operating activities$1,422,304 $3,115,688 $3,456,008 $2,079,106 $1,125,919 
Net cash used in investing activities$(1,511,358)$(2,771,956)$(2,860,172)$(1,808,845)$(532,965)
Net cash (used in) provided by financing activities$97,124 $(587,108)$(356,934)$(243,034)$(587,773)
Total capital expenditures$1,363,034 $2,809,192 $2,928,746 $2,035,254 $1,110,256 
Balance Sheet data at December 31 (in thousands)
Total assets$14,633,098 $15,727,907 $15,297,947 $14,199,651 $13,811,776 
Long-term debt, including current portion$5,532,418 $5,326,514 $5,768,349 $6,353,691 $6,579,916 
Total equity$6,422,725 $7,108,351 $6,421,861 $5,131,203 $4,301,996 

(1)In years prior to 2018, we generally presented our revenues net of costs incurred to transport our production to market. For 2020, 2019, and 2018, crude oil and natural gas sales are presented gross of certain transportation expenses as a result of our January 1, 2018 adoption of ASU 2014-09, Revenue from Contracts with Customers (Topic 606). We adopted the new rules using a modified retrospective transition approach whereby the rules were prospectively applied beginning January 1, 2018 and prior period results were not adjusted to conform to the current presentation. The change in presentation resulted in an increase in revenues and a corresponding increase in separately reported transportation expenses, with no net effect on our results of operations, net income, or cash flows.
Taxes (2)Results for further discussion. Additionally, 2017 include the remeasurement of the Company's deferred income tax assets and liabilities in response to the enactment of the Tax Cuts and Jobs Act in December 2017, which resulted in a one-time increase in net income of approximately $713.7 million ($1.92 per basic share and $1.91 per diluted share).
(3)Excludes results include a $59.6 million pre-tax loss accrual recognized in conjunction with a litigation settlement as discussed in attributable to noncontrolling interests. See Part II, Item 8. Notes to Consolidated Financial Statements—Note 11. Commitments16. Noncontrolling Interests for a discussion of the arrangements that give rise to the separate presentation of results attributable to Continental and Contingencies, which resultednoncontrolling interests in an after-tax decrease in 2017 net income of $37.0 million ($0.10 per basic and diluted share).
(4)
Excludes results attributable to noncontrolling interests. See Part II, Item 8. Notes to Consolidated Financial Statements—Note 15. Noncontrolling Interests for a discussion of new arrangements executed in 2018 that gave rise to the separate presentation of results attributable to Continental and noncontrolling interests in our financial statements.


our financial statements.


41


ITEM 7.Management’s Discussion and Analysis of Financial Condition and Results of Operations
ITEM 7.    Management’s Discussion and Analysis of Financial Condition and Results of Operations
The following discussion and analysis should be read in conjunction with our consolidated financial statements and notes, as well as the selected consolidated financial data included elsewhere in this report. Our operating results for the periods discussed below may not be indicative of future performance. Results attributable to noncontrolling interests are immaterialnot material relative to consolidated results and are not separately presented or discussed below.
For additional discussion of crude oil and natural gas reserve information, please see Part I, Item 1. Business—Crude Oil and Natural Gas Operations.The following discussion and analysis includes forward-looking statements and should be read in conjunction with Part I, Item 1A. Risk Factors in this report, along with Cautionary Statement for the Purpose of the “Safe Harbor” Provisions of the Private Securities Litigation Reform Act of 1995 at the beginning of this report, for information about the risks and uncertainties that could cause our actual results to be materially different than our forward-looking statements.
Our operating results for 2020 discussed below were impacted by the economic effects from the COVID-19 pandemic on crude oil demand and prices and may not be indicative of future results. Given the economic uncertainty from the pandemic and ongoing volatility in commodity prices, it is difficult to predict the extent to which the pandemic or other factors will have on the Company’s performance in 2021 and beyond.
Overview
We are an independent crude oil and natural gas company engaged in the exploration, development and production of crude oil and natural gas. Additionally, we pursue the acquisition and management of perpetually owned minerals located in certain of our key operating areas. We derive the majority of our operating income and cash flows from the sale of crude oil and natural gas and expect this to continue in the future. Our operations are primarily focused on exploration and development activities in the Bakken field of North Dakota and Montana and the SCOOP and STACK areas of Oklahoma. Our common stock trades on the New York Stock Exchange under the symbol “CLR” and our corporate internet website is www.clr.com.
2018 Highlights
ProductionBusiness Environment and Outlook
Crude oil prices decreased to historically low levels in April 2020 due primarily to reduced global and domestic demand for crude oil caused by the impact of the COVID-19 pandemic and resulting changes in consumer behavior and restrictions implemented by governments to mitigate the pandemic. In response to the significant reduction in crude oil prices, we began voluntarily curtailing our production in April 2020 and ultimately curtailed approximately 55% of our operated crude oil production and associated natural gas in the 2020 second quarter. Additionally, in light of the challenges facing our business and industry, we implemented cost saving initiatives and significantly reduced our operated rig and completion crew counts in order to preserve our assets and better align our capital spending with expected available cash flows, resulting in a $1.5 billion, or 56%, decrease in our non-acquisition capital spending in 2020 compared to 2019. These actions, coupled with historically low crude oil prices, resulted in a material reduction in our production, averaged 298,190revenues, and cash flows in 2020 compared to 2019.
Crude oil prices began to stabilize in mid-2020 and generally improved in the second half of 2020 in response to the gradual lifting of COVID-19 restrictions, the resumption of economic activity, and the resulting increase in crude oil demand. In July 2020 we began to gradually restore our curtailed production and subsequently brought our remaining curtailed production back online in September 2020. As a result of our resumed production, coupled with strategic well completion activities in late 2020, our total average production improved to 339,307 Boe per day in 2018, an increase of 23% compared to 2017.
Total production for the 2020 fourth quarter, of 2018 averaged 324,001 Boe per day, anrepresenting a 14% increase of 9% compared to the third quarter of 2018 and 13% higher2020, yet still remaining 7% lower than the fourth quarter of 2017.2019.
Average dailyDespite the gradual improvement in crude oil production increased 21%prices in 2018 comparedthe second half of 2020, we continued our commitment to 2017 while average daily natural gas production increased 25%.
The following table summarizesoperating in a disciplined, capital efficient manner. Improved revenues from higher commodity prices coupled with our tempered spending resulted in the changesgeneration of cash flows in excess of operating and capital needs in the second half of 2020 that allowed for a $210 million net reduction in our average daily Boe production by major operating area for the periods presented.
  Fourth Quarter Year Ended December 31,
Boe production per day 2018 2017 % Change 2018 2017 % Change
Bakken 183,836
 165,598
 11% 167,800
 132,992
 26%
SCOOP 67,244
 62,242
 8% 64,339
 60,693
 6%
STACK 62,947
 47,914
 31% 56,055
 36,220
 55%
All other 9,974
 11,231
 (11%) 9,996
 12,732
 (21%)
Total 324,001
 286,985
 13% 298,190
 242,637
 23%
Proved reserves
At December 31, 2018, our proved reserves totaled 1,522 MMBoe, an increase of 14%from proved reserves of 1,331 MMBoetotal debt at December 31, 2017.
Extensions, discoveries and other additions from our drilling and completion activities added 565 MMBoe of proved reserves in 2018 and upward reserve revisions due2020 compared to improved commodity prices increased reserves by 26 MMBoe. These increases were partially offset by 109 MMBoe ofJune 30, 2020. Additionally, despite production curtailments during the year, and net downward reserve revisions and removals totaling 295 MMBoe resulting from changes in drilling plans and other factors.


The following table summarizes the changes inwe continued to drive our proved reserves by major operating area in 2018:
  December 31, 2018 December 31, 2017 Volume change Volume
percent
change
Proved reserves by area MBoe Percent MBoe Percent 
Bakken 798,005
 52% 635,521
 48% 162,484
 26%
SCOOP 459,103
 30% 491,776
 37% (32,673) (7%)
STACK 230,175
 15% 167,390
 13% 62,785
 38%
All Other 35,082
 3% 36,308
 2% (1,226) (3%)
Total 1,522,365
 100% 1,330,995
 100% 191,370
 14%
Operating cash flows
Net cash inflows from operating activities totaled $3.46 billionper-unit production expenses lower to $3.27 per Boe for 2018, an increase of 66%2020 compared to $2.08 billion$3.58 per Boe for 2017, reflecting higher commodity prices and sales volumes. Net cash inflows from operating activities exceeded net cash outflows from investing activities by $596 million for 2018, allowing for further debt reduction during2019.
We remain committed to the year.
Debt and liquidity
Total debt decreased $585 million, or 9%, in 2018, reflecting the repayment of all previously outstanding credit facility borrowings at year-end 2017 along with the $400 million partial redemptionresponsible stewardship of our $2.0 billionassets and continue to focus on maximizing cash flows, further reducing debt, delivering low-cost capital efficient operations, and generating shareholder value. The depth and quality of 5% Senior Notes due 2022our asset base, the commodity optionality provided by our significant amount of acreage held by production, and our financial strength allow us to be adaptable in August 2018.
At December 31, 2018,a variety of price environments. We remain flexible as we had $283 million of cashmonitor and cash equivalentsadapt to market conditions. See the subsequent section titled Liquidity and $1.5 billion of borrowing availability on our credit facility. We had no outstanding credit facility borrowings at December 31, 2018 and continued to have no outstanding borrowings as of January 31, 2019.
Strategic mineral relationship
In October 2018 we entered into a strategic relationship with Franco-Nevada Corporation to acquire oil and gas mineral interests in the SCOOP and STACK plays through a newly-formed minerals subsidiary. At closing, Franco-Nevada paid $214.8 million to Continental for an interest in the minerals subsidiary and for funding of its share of certain mineral acquisition costs, and has subsequently made additional funding contributions. Under the arrangement, Continental is to fund 20% of future mineral acquisitions and will be entitled to receive between 25% and 50% of total revenues generated by the minerals subsidiary based upon performance relative to predetermined production targets. See Part II, Item 8. Notes to Consolidated Financial Statements—Note 15. Noncontrolling InterestsCapital Resources for additional information.discussion of our financial condition.
42


Financial and operating highlights
We use a variety of financial and operating measures to assess our performance. Among these measures are:
Volumes of crude oil and natural gas produced;
Crude oil and natural gas price differentials relative to NYMEX benchmark prices; and
Per unit operating and administrative costs.


Operating Metrics
The following table contains financial and operating highlights for the periods presented. Average net sales prices exclude any effect of derivative transactions. Per-unit expenses have been calculated using sales volumes.
 Year ended December 31,
 202020192018
Average daily production:
Crude oil (Bbl per day)160,505 197,991 168,177 
Natural gas (Mcf per day)837,509 854,424 780,083 
Crude oil equivalents (Boe per day)300,090 340,395 298,190 
Average net sales prices: (1)
Crude oil ($/Bbl)$34.71 $51.82 $59.19 
Natural gas ($/Mcf)$1.04 $1.77 $3.01 
Crude oil equivalents ($/Boe)$21.47 $34.56 $41.25 
Crude oil net sales price discount to NYMEX ($/Bbl)$(5.80)$(5.15)$(5.27)
Natural gas net sales price discount to NYMEX ($/Mcf)$(1.10)$(0.86)$(0.09)
Production expenses ($/Boe)$3.27 $3.58 $3.59 
Production taxes (% of net crude oil and natural gas sales)8.2 %8.3 %7.9 %
DD&A ($/Boe)$17.12 $16.25 $17.09 
Total general and administrative expenses ($/Boe)$1.79 $1.57 $1.69 
  Year ended December 31,
  2018 2017 2016
Average daily production:      
Crude oil (Bbl per day) 168,177
 138,455
 128,005
Natural gas (Mcf per day) 780,083
 625,093
 533,442
Crude oil equivalents (Boe per day) 298,190
 242,637
 216,912
Average net sales prices: (1)      
Crude oil ($/Bbl) $59.19
 $45.70
 $35.51
Natural gas ($/Mcf) $3.01
 $2.93
 $1.87
Crude oil equivalents ($/Boe) $41.25
 $33.65
 $25.55
Crude oil net sales price discount to NYMEX ($/Bbl) $(5.27) $(5.50) $(7.33)
Natural gas net sales price discount to NYMEX ($/Mcf) $(0.09) $(0.16) $(0.61)
Production expenses ($/Boe) $3.59
 $3.66
 $3.65
Production taxes (% of net crude oil and natural gas sales) 7.9% 7.0% 7.0%
DD&A ($/Boe) $17.09
 $18.89
 $21.54
Total general and administrative expenses ($/Boe) $1.69
 $2.16
 $2.14
(1)
See the subsequent section titled Non-GAAP Financial Measures for a discussion and calculation of net sales prices, which are non-GAAP measures for 2018.



(1)     See the subsequent section titled Non-GAAP Financial Measures for a discussion and calculation of net sales prices, which are non-GAAP measures.
Results of Operations
The following table presents selected financial and operating information for the periods presented.
   Year Ended December 31,
In thousands, except sales price data 2018 2017 2016
Crude oil and natural gas sales (1) $4,678,722
 $2,982,966
 $2,026,958
Gain (loss) on crude oil and natural gas derivatives, net (23,930) 91,647
 (71,859)
Crude oil and natural gas service operations 54,794
 46,215
 25,174
Total revenues 4,709,586
 3,120,828
 1,980,273
Operating costs and expenses (2) (3,115,866) (2,671,427) (2,267,807)
Other expenses, net (3) (296,918) (293,334) (344,920)
Income (loss) before income taxes 1,296,802
 156,067
 (632,454)
(Provision) benefit for income taxes (4) (307,102) 633,380
 232,775
Net income (loss) 989,700
 789,447
 (399,679)
Net income attributable to noncontrolling interests 1,383
 
 
Net income (loss) attributable to Continental Resources $988,317
 $789,447
 $(399,679)
Diluted net income (loss) per share attributable to Continental Resources $2.64
 $2.11
 $(1.08)
Production volumes:      
Crude oil (MBbl) 61,384
 50,536
 46,850
Natural gas (MMcf) 284,730
 228,159
 195,240
Crude oil equivalents (MBoe) 108,839
 88,562
 79,390
Sales volumes:      
Crude oil (MBbl) 61,332
 50,628
 46,802
Natural gas (MMcf) 284,730
 228,159
 195,240
Crude oil equivalents (MBoe) 108,787
 88,655
 79,342
(1)
In years prior to 2018, we generally presented our revenues net of costs incurred to transport our production to market. For 2018, crude oil and natural gas sales are presented gross of certain transportation expenses as a result of our January 1, 2018 adoption of new revenue recognition and presentation rules (ASU 2016-08) as discussed in Part II, Item 8. Notes to Consolidated Financial Statements—Note 8. Revenues. We adopted the new rules using a modified retrospective transition approach whereby the rules were prospectively applied beginning January 1, 2018 and prior period results have not been adjusted to conform to the current presentation. The change in presentation resulted in an increase in revenues and a corresponding increase in separately reported transportation expenses, with no net effect on our results of operations, net income, or cash flows for 2018.
(2)
Net of gain on sale of assets of $16.7 million, $55.1 million, and $304.5 million for 2018, 2017, and 2016, respectively. The year 2018 includes $191.6 million of transportation expenses that are presented gross of crude oil and natural gas sales as a result of our aforementioned adoption of ASU 2016-08 on January 1, 2018. The year 2017 includes a $59.6 million loss accrual recognized in conjunction with the litigation settlement described in Part II, Item 8. Notes to Consolidated Financial Statements—Note 11. Commitments and Contingencies—Litigation.
(3)Includes losses on extinguishment of debt of $7.1 million, $0.6 million, and $26.1 million for 2018, 2017, and 2016, respectively.
(4)The year 2017 reflects the remeasurement of our deferred income tax assets and liabilities in response to the enactment of the Tax Cuts and Jobs Act in December 2017, which resulted in a one-time decrease in income tax expense via the recognition of an income tax benefit totaling $713.7 million.

  Year Ended December 31,
In thousands, except sales price data202020192018
Crude oil and natural gas sales$2,555,434 $4,514,389 $4,678,722 
Gain (loss) on derivative instruments, net(14,658)49,083 (23,930)
Crude oil and natural gas service operations45,694 68,475 54,794 
Total revenues2,586,470 4,631,947 4,709,586 
Operating costs and expenses(3,140,362)(3,374,535)(3,115,866)
Other expenses, net(220,859)(270,250)(296,918)
Income (loss) before income taxes(774,751)987,162 1,296,802 
(Provision) benefit for income taxes169,190 (212,689)(307,102)
Net income (loss)(605,561)774,473 989,700 
Net income (loss) attributable to noncontrolling interests(8,692)(1,168)1,383 
Net income (loss) attributable to Continental Resources$(596,869)$775,641 $988,317 
Diluted net income (loss) per share attributable to Continental Resources$(1.65)$2.08 $2.64 
Production volumes:
Crude oil (MBbl)58,745 72,267 61,384 
Natural gas (MMcf)306,528 311,865 284,730 
Crude oil equivalents (MBoe)109,833 124,244 108,839 
Sales volumes:
Crude oil (MBbl)58,793 72,136 61,332 
Natural gas (MMcf)306,528 311,865 284,730 
Crude oil equivalents (MBoe)109,881 124,113 108,787 

43







Year ended December 31, 20182020 compared to the year ended December 31, 20172019
Below is a discussion of changes in our results of operations for 2020 compared to 2019. A discussion of changes in our results of operations for 2019 compared to 2018 has been omitted from this Form 10-K, but may be found in Part II, Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations of our Form 10-K for the year ended December 31, 2019 as filed with the SEC on February 26, 2020.
Production
The following table summarizes the changes in our average daily Boe production by major operating area for the periods presented.
 Fourth QuarterYear Ended December 31,
Boe production per day20202019% Change20202019% Change
Bakken183,141 194,156 (6 %)158,604 194,691 (19 %)
SCOOP107,060 111,829 (4 %)96,503 82,882 16 %
STACK42,281 51,628 (18 %)38,003 54,587 (30 %)
All other6,825 7,728 (12 %)6,980 8,235 (15 %)
Total339,307 365,341 (7 %)300,090 340,395 (12 %)
The following tables reflect our production by product and region for the periods presented.
 Year Ended December 31, Volume
increase
 Volume
percent
increase
Year Ended December 31,Volume
decrease
Volume
percent
decrease
 2018 2017  20202019
 Volume Percent Volume Percent  VolumePercentVolumePercent
Crude oil (MBbl) 61,384
 56% 50,536
 57% 10,848
 21%Crude oil (MBbl)58,745 53 %72,267 58 %(13,522)(19 %)
Natural gas (MMcf) 284,730
 44% 228,159
 43% 56,571
 25%Natural gas (MMcf)306,528 47 %311,865 42 %(5,337)(2 %)
Total (MBoe) 108,839
 100% 88,562
 100% 20,277
 23%Total (MBoe)109,833 100 %124,244 100 %(14,411)(12 %)
 
 Year Ended December 31, Volume
increase
 Volume
percent
increase
Year Ended December 31,Volume
decrease
Volume
percent
decrease
 2018 2017  20202019
 MBoe Percent MBoe Percent  MBoePercentMBoePercent
North Region 64,577
 59% 52,258
 59% 12,319
 24%North Region60,591 55 %74,028 60 %(13,437)(18 %)
South Region 44,262
 41% 36,304
 41% 7,958
 22%South Region49,242 45 %50,216 40 %(974)(2 %)
Total 108,839
 100% 88,562
 100% 20,277
 23%Total109,833 100 %124,244 100 %(14,411)(12 %)
The 21%19% decrease in crude oil production in 2020 compared to 2019 was primarily due to a 12,763 MBbls, or 24%, decrease in Bakken oil production along with a 1,315 MBbls, or 37%, decrease in STACK oil production due to the previously described production curtailments and limited drilling and completion activities undertaken in response to the adverse commodity price environment during the year. These decreases were partially offset by a 906 MBbls, or 8%, increase in crude oil production in 2018 compared to 2017 was primarilySCOOP due to a 9,811 MBbls, or 27%, increasenew well completions over the past year in our oil-weighted Project SpringBoard, which exceeded the impact of production from propertiescurtailments in North Dakota Bakken due to an increase in well completion activitiesthe play.
Our production curtailments and improved initial production results achieved on new wells resulting from optimized completion technologies. Additionally, crude oil production from the STACK and SCOOP plays increased 416 MBbls (up 13%) and 1,192 MBbls (up 21%), respectively, from the prior year due to additional wells being completed and producing as a result of an increase in ourlimited drilling and completion activities in those areas.2020 also impacted our natural gas production, leading to a 28,202 MMcf, or 29%, decrease in STACK natural gas production and a 1,501 MMcf, or 1%, decrease in Bakken natural gas production in 2020 compared to 2019. These increasesdecreases were partially offset by decreaseda 24,974 MMcf, or 22%, increase in SCOOP natural gas production from our North region properties in Montana Bakken andconjunction with the Red River units due to natural declinespreviously described increase in production. Montana Bakken crude oil production decreased 281 MBbls, or 13%, whileSCOOP crude oil production in 2020.
We have a deep inventory of both oil and gas assets that allow us to be responsive to changes in oil and gas commodity price fundamentals. In the Red River units decreased 261 MBbls, or 8%, from the prior year.
The 25%second quarter of 2020 we strategically shifted our rigs to gas-weighted areas in Oklahoma to capitalize on improvements in market prices for natural gas. These actions contributed to an increase in our natural gas production in 2018 compared to 2017 was primarily due to increasedas a percentage of total production from our properties42% in the STACK play due2019 to additional wells being completed. Natural gas production47% in STACK increased 40,942 MMcf, or 68%, over the prior year. Additionally, natural gas production in North Dakota Bakken increased 19,216 MMcf, or 32%, in conjunction with the aforementioned2020 and an increase in crude oilour South region production over the prior year. Increased drilling and completion activities in the SCOOP play contributed to an 834 MMcf, or 1%, increase in natural gas production compared to the prior year. These increases were partially offset by reducedas a percentage of total production from various other areas due40% in 2019 to property dispositions and natural declines45% in production.
Crude oil represented 58% of our production for the fourth quarter of 2018 compared to 55% for the third quarter of 2018, reflecting increased well completion activities on oil-weighted properties in the fourth quarter. We expect continued growth of oil-weighted production in 2019.2020.
Revenues
Our revenues consist of sales of crude oil and natural gas, gains and losses resulting from changes in the fair value of our natural gas derivative instruments, and revenues associated with crude oil and natural gas service operations.
44


Net crude oil and natural gas sales and related net sales prices presented below are non-GAAP measures for 2018.measures. See the subsequent section titled Non-GAAP Financial Measures for discussion and calculation of these measures.
Net crude oil and natural gas sales. Net crude oil and natural gas sales for 2018 were $4.492020 totaled $2.36 billion, a 50% increase from45% decrease compared to net sales of $2.98$4.29 billion for 20172019 due to increasessignificant decreases in sales volumes and net sales prices and sales volumes as describeddiscussed below.
Total sales volumes for 2018 increased 20,1322020 decreased 14,232 MBoe, or 23%11%, compared to 2017,2019, reflecting an increasereduced sales from the previously described production curtailments in our pace of drilling and completion activities in 2018.the current year. For 2018,2020, our crude oil sales volumes increased 21%decreased 18% compared to 20172019, while our natural gas sales volumes increased 25%decreased 2%.


Our crude oil net sales prices averaged $59.19$34.71 per barrel for 2018, an increase2020, a decrease of 30%33% compared to $45.70$51.82 per barrel for 20172019 due to higher crude oilsignificantly reduced market prices and improvedwider price realizations.differentials. The differential between NYMEX West Texas Intermediate (“WTI”) calendar month crude oil prices and our realized crude oil net sales prices averaged $5.27$5.80 per barrel for 2018in 2020 compared to $5.50 for 2017.$5.15 per barrel in 2019. The improvedincreased differential was duereflects changes in part to the amendment of an existing third party transportation arrangement for North region productionsupply and demand fundamentals and economic effects from COVID-19 that resulted in lower per-barrel fees charged to the Company, effective January 1, 2018, along with growth in our South region crude oil production which typically has lower transportation costs compared to the Bakken due to its relatively close proximity to regional refineriesimpacted location differentials and the crude oil trading hub in Cushing, Oklahoma. The positive impact from these factors was partially offset by a significant widening of our oil differentials in late 2018 due to heavier than normal refinery maintenance and other factors that adversely impacted our price realizations in the Bakken, causing ourfirst and second quarters of 2020 compared to the prior year. Our crude oil net sales price differential to increase to $8.44NYMEX averaged $5.20 per barrel for the 2018 fourth quarter compared to $3.72 per barrel for the 2018 third quarter. The factors contributing to wider differentials in late 2018 have improved and we currently expect our crude oil differentials will strengthen in 2019 compared to 2018 fourth quarter levels.of 2020.
Our natural gas net sales prices averaged $3.01$1.04 per Mcf for 2018,2020, a 3% increase41% decrease compared to $2.93$1.77 per Mcf for 20172019 due to improvedsignificantly reduced market prices and lower price realizations for our natural gas sales stream.realizations. The discount between our realized natural gas net sales prices and NYMEX Henry Hub calendar month natural gas prices averaged $0.09weakened to $1.10 per Mcf for 20182020 compared to $0.16$0.86 per Mcf for 2017.2019. We sell the majority of our operated natural gas production to midstream customers at lease locations under multi-year term contracts based on market prices in the field where the sales occur. The field markets are impacted by residue gas and natural gas liquids ("NGLs") prices at secondary, downstream markets. For the first nine months of 2018, NGL prices were generally higher than 2017decreased in 2020 compared to 2019 levels in conjunction with increaseddecreased crude oil prices and other factors, resulting in improvedreduced price realizations for our natural gas sales stream relative to benchmark prices. However, NGL prices decreased in late 2018 in conjunction withAs a result of the significant decrease in crude oil prices, described below, which adversely impactedunder certain of our arrangements on operated properties the price realizationscontractual pricing adjustments applied by midstream customers exceeded the sales consideration we were entitled to receive, resulting in a net payment owed by us to the customers. Additionally, in some instances on non-operated properties the costs incurred by the outside operator exceeded the consideration we were entitled to receive, resulting in a net payment owed by us to the outside operator. The net amounts paid or payable under these arrangements on operated and non-operated properties totaled $42.9 million for our2020, and are reflected as a reduction of natural gas revenues and net sales stream and causedprices. Nearly all of such amounts were associated with our differential to Henry Hub benchmark prices to be a discount of $0.40 per Mcf for the 2018 fourth quarter compared to a premium of $0.22 per Mcf for the 2018 third quarter.
For the 2018 fourth quarter, net crude oil andNorth region natural gas sales totaled $1.11 billion, a 10% decrease from the 2018 third quarter and a 9% increase from the 2017 fourth quarter. Revenues for the 2018 fourth quarter were adversely impacted by a significant decrease in WTI benchmark prices, which decreased 42% during the quarter from a high of $76.40 per barrel to a low of $44.48 per barrel. Our crude oil net sales prices averaged $50.06 per barrel in the 2018 fourth quarter compared to $65.78 for the 2018 third quarter and $51.16 for the 2017 fourth quarter. The reduction in our fourth quarter sales from lower crude oil prices was mitigated by increased sales volumes. Crude oil sales volumes for the 2018 fourth quarter increased 13% and 10% compared to the 2018 third quarter and 2017 fourth quarter periods, respectively, while natural gas sales volumes for the 2018 fourth quarter were 4% and 15% higher than the 2018 third quarter and 2017 fourth quarter periods, respectively.production.
Derivatives. Changes in natural gasmarket prices during 20182020 had an overall unfavorable impact on the fair value of our derivatives, which resulted in negative revenue adjustments of $23.9$14.7 million for the year, representing $36.9$28.2 million of cash losses partially offset by $13.0$13.5 million of unsettled non-cash gains. For 2019, we recognized positive revenue adjustments of $49.1 million resulting from changes in market prices that had a favorable impact on the fair value of our derivatives. 
Crude oil and natural gas service operations. Our crude oil and natural gas service operations consist primarily of revenues associated with water gathering, recycling, and disposal activities, which are impacted by our production volumes and the treatmenttiming and saleextent of crude oil reclaimed from waste products.our drilling and completion projects. Revenues associated with such activities increased $8.6decreased $22.8 million, or 19%33%, from $46.2$68.5 million for 20172019 to $54.8$45.7 million for 20182020 due to an increase in the magnitude ofreduced water handling activities resulting from our curtailment of production and recyclingreduced completion activities compared toduring the prior year. The increaseddecreased activities also resulted in a corresponding increasereduction in service-related expenses compared to 2017.the prior period.
Operating Costs and Expenses
Production expenses. Production expenses increased $66.2decreased $85.3 million, or 20%19%, from $324.2to $359.3 million for 20172020 compared to $390.4$444.6 million for 2018 primarily2019. This decrease resulted from reduced service costs being incurred in conjunction with production curtailments and cost control efforts, operating efficiency gains, and a higher portion of our production coming from wells in Oklahoma which typically have lower operating costs compared to wells in the Bakken, all of which led to a reduction in our production expenses to $3.27 per Boe for 2020 compared to $3.58 per Boe for 2019. Despite our production curtailments, we achieved sequential reductions in our per-Boe production expenses each quarter during 2020 and, as a result of our efficient operations and low-cost production growth in Oklahoma late in the year, our production expenses decreased to a notably low $2.80 per Boe for the 2020 fourth quarter.
Production taxes. Production taxes decreased $165.3 million, or 46%, to $192.7 million for 2020 compared to $358.0 million for 2019 due to an increasea 43% decrease in the number of producing wells and related 23% increase in sales volumes. Production expenses on a per-Boe basis decreased to $3.59 for 2018 compared to $3.66 for 2017.
Production taxes. Production taxes increased $144.8 million, or 70%, to $353.1 million in 2018 compared to $208.3 million in 2017 primarily due to higher crude oil and natural gas sales. Production taxes are generally based on the wellhead values ofOur production and vary by state. Production taxes as a percentage of net crude oil and natural gas sales averaged 7.9%8.2% for 2018 compared to 7.0%2020, consistent with 8.3% for 2017. This increase was due in part to a significant increase in production and revenues generated in North Dakota from increased well completion activities over the past year, which has higher production tax rates compared to Oklahoma. Additionally, in 2017 legislation was enacted in Oklahoma that increased the production tax rate from 4% to 7% (effective December 1, 2017) on wells that began producing between July 1, 2011 and July 1, 2015, which contributed to the increase in our average production tax rate for 2018. In March 2018, new legislation was enacted again in Oklahoma that increased the state's production tax rate, effective July 1, 2018, from 2% to 5% for the first 36 months of production for wells commencing production after July 1, 2015, which also contributed to the increase in our average production tax rate.2019.

45



Exploration expenses. Exploration expenses, which consist primarily of dry hole costs and exploratory geological and geophysical costs and dry hole costs that are expensed as incurred. The following table shows the components of exploration expensesincurred, increased $3.0 million, or 21%, to $17.7 million for the periods presented.
  Year ended December 31,
In thousands 2018 2017
Geological and geophysical costs $7,495
 $12,217
Exploratory dry hole costs 147
 176
Exploration expenses $7,642
 $12,393
The decrease in geological and geophysical expenses in 2018 was2020 compared to $14.7 million for 2019 due to changes in the timing and amountextent of our exploration-related activities. The 2020 period includes $6.3 million of dry hole costs recognized in the first quarter associated with an unsuccessful exploratory well with no comparable dry hole costs incurred by the Company and billed to joint interest owners between periods. in 2019.
Depreciation, depletion, amortization and accretion (“DD&A”). Total DD&A increased $184.4decreased $136.4 million, or 11%7%, to $1.86$1.88 billion for 20182020 compared to $1.67$2.02 billion for 20172019 due to an increase11% decrease in total sales volumes, the impact of which was partially offset by the impact from an increase in the volume of proved developed reserves over which costs are depletedour DD&A rate per Boe as further discussed below. The following table shows the components of our DD&A on a unit of sales basis for the periods presented.
 Year ended December 31,
$/Boe20202019
Crude oil and natural gas properties$16.84 $16.03 
Other equipment0.19 0.15 
Asset retirement obligation accretion0.09 0.07 
Depreciation, depletion, amortization and accretion$17.12 $16.25 
  Year ended December 31,
$/Boe 2018 2017
Crude oil and natural gas properties $16.84
 $18.57
Other equipment 0.18
 0.25
Asset retirement obligation accretion 0.07
 0.07
Depreciation, depletion, amortization and accretion $17.09
 $18.89
Estimated proved reserves are a key component in our computation of DD&A expense. Proved reserves are determined using the unweighted arithmetic average of the first-day-of-the-month commodity prices for the preceding twelve months as required by SEC rules. Holding all other factors constant, if proved reserves are revised downward due to commodity price declines or other reasons, the rate at which we record DD&A expense increases. Conversely, if proved reserves are revised upward, the rate at which we record DD&A expense decreases. Upward
Downward revisions toof proved developed reserves overat year-end 2020 prompted by the past year duesignificant decrease in part to an improvement inaverage commodity prices contributed to a decreaseand other factors resulted in an increase in our DD&A rate for crude oil and natural gas properties in 2018 compared to 2017. Additionally, improvements in drilling efficiencies and optimized completion technologies over2019. As a result of these downward revisions, our DD&A increased to $19.01 per Boe for the past year have resulted in an improvement in2020 fourth quarter compared to $16.45 per Boe for the quantity of proved reserves found and developed per dollar invested,2019 fourth quarter, which also contributed to the reductionoverall increase in our DD&A rate for the full year of 2020.
NYMEX WTI crude oil and Henry Hub natural gas first-day-of-the-month commodity prices for January 1, 2021 and February 1, 2021 averaged $51.04 per barrel and $2.53 per MMBtu, respectively, which are notably higher than average prices in 2020. If commodity prices remain at current levels for an extended period, upward price-related revisions of proved reserves may occur in the current period.  future, which may be significant and could result in a decrease in our DD&A rate relative to the 2020 fourth quarter. We are unable to predict the timing and amount of future reserve revisions or the impact such revisions may have on our future DD&A rate.
Property impairments. Property impairments decreased $112.2increased $191.7 million or 47%, to $125.2$277.9 million in 2018for 2020 compared to $237.4$86.2 million in 2017,for 2019, primarily reflecting lowerhigher proved and unproved property impairments as described below.
Proved property impairments decreased to $18.0Impairments of proved oil and gas properties totaled $182.6 million for 2018 compared to $82.32020, of which $181.0 million for 2017 due to changeswas recognized in the 2020 first quarter and $1.6 million was recognized in the 2020 third quarter, resulting from the significant decrease in commodity prices that indicated the carrying values for certain fields were not recoverable. The impairments were recognized on legacy properties in the Red River Units ($168.1 million) and resulting impact on fairvarious non-core properties in the North and South regions ($14.5 million). Additionally, in response to decreased crude oil prices, we recognized a $24.5 million impairment in the 2020 first quarter to reduce the value assessments andof our crude oil inventory to estimated net realizable value at the time of impairment. There were no significant proved property impairments between periods.recognized in 2019.
Impairments of unproved properties decreased $47.8$11.7 million, or 31%14%, to $107.2$70.8 million in 20182020 compared to $155.0$82.5 million for 2017. This decrease wasin 2019 due to a lowerreduction in the balance of unamortized leasehold costs in the current period and a reduction over the past year in the Company's estimates of undeveloped properties not expected to be developed prior to lease expiration due to an increase in the allocation of capital to development drilling activities in 2017 and 2018.year.     
General and administrative ("G&A") expenses. Total G&A expenses decreased $8.1totaled $196.6 million or 4%,for 2020, consistent with $195.3 million for 2019 due to $183.6 millionoffsetting changes in 2018 from $191.7 million in 2017. equity compensation expenses and other G&A charges as described below.
Total G&A expenses include non-cash charges for equity compensation of $47.2$64.6 million and $45.9$52.0 million for 20182020 and 2017, respectively. G&A expenses other than equity compensation included in2019, respectively, the total G&A expense figure above totaled $136.4 million for 2018, a decrease of $9.4 million, or 6%, compared to $145.8 million for 2017. We incurred higher personnel-related costs in 2018 associated with the growth in our operations over the past year; however, the increased costs were more than offset by operational efficiencies and higher overhead recoveries from joint interest owners due to increased drilling and completion activities.
The following table shows the components of G&A expenses on a unit of sales basis for the periods presented.
   Year ended December 31,
$/Boe 2018 2017
General and administrative expenses $1.25
 $1.64
Non-cash equity compensation 0.44
 0.52
Total general and administrative expenses $1.69
 $2.16


The decreases in G&A expenses on a per-Boe basis in 2018 were due to a 23% increase in total sales volumes from new well completions with no comparable increase in G&A expenses.
Interest expense. Interest expense decreased to $293.0 million in 2018 compared to $294.5 million in 2017. We incurred lower interest expenses in 2018 resulting from a decrease in total outstanding debt, the impact of which was nearly offset by higher expenses incurred due to increases in market interest rates on variable-rate credit facility borrowings over the past year. Our weighted average outstanding long-term debt balance for 2018 was approximately $6.2 billion with a weighted average interest rate of 4.5% compared to averages of $6.7 billion and 4.2% for 2017. The 2018 period includes $13 million of interest expense associated with the $400 million portion of our 2022 Notes that was redeemed in August 2018.
Income Taxes. For 2018 and 2017 we provided for income taxes at a combined federal and state tax rate of 24.5% and 38%, respectively, of pre-tax income generated by our operations in the United States. Our tax provision for 2018 reflects our application of the Tax Cuts and Jobs Act that was signed into law in December 2017, which among other things reduced the U.S. federal corporate income tax rate from 35% to 21% effective January 1, 2018. The application of statutory tax rates to pre-tax earnings, combined with the impact of permanent taxable differences, valuation allowances, tax effects from stock-based compensation, and other items resulted in the recognition of $307.1 million and $80.3 million of income tax expense for 2018 and 2017, respectively.
Additionally, at year-end 2017 we remeasured our deferred income tax balances in response to the enactment of the Tax Cuts and Jobs Act, which resulted in a one-time decrease in income tax expense in 2017 via the recognition of an income tax benefit totaling $713.7 million and caused a significant inconsistency in the relationship between income tax expense/benefit and pre-tax income. Upon combining the tax benefit from this remeasurement with the tax provision recognized on pre-tax earnings from operations, we recognized a net total income tax benefit of $633.4 million for 2017.
See Part II, Item 8. Notes to Consolidated Financial Statements—Note 9. Income Taxes for a summary of the sources and tax effects of items comprising our income tax provision/benefit and resulting effective tax rates for 2018 and 2017.
Year ended December 31, 2017 compared to the year ended December 31, 2016
Production
The following tables reflect our production by product and region for the periods presented.
  Year Ended December 31, Volume
increase
 Volume
percent
increase
  2017 2016 
  Volume Percent Volume Percent 
Crude oil (MBbl) 50,536
 57% 46,850
 59% 3,686
 8%
Natural gas (MMcf) 228,159
 43% 195,240
 41% 32,919
 17%
Total (MBoe) 88,562
 100% 79,390
 100% 9,172
 12%
  Year Ended December 31, Volume
increase
 Volume
percent
increase
  2017 2016 
  MBoe Percent MBoe Percent 
North Region 52,258
 59% 48,169
 61% 4,089
 8%
South Region 36,304
 41% 31,221
 39% 5,083
 16%
Total 88,562
 100% 79,390
 100% 9,172
 12%
The 8% increase in crude oil production in 2017 compared to 2016 was primarily due to a 4,241 MBbls, or 13%, increase in production from properties in North Dakota Bakken due to an increase in well completion activities, the timing of production commencing from new pad development projects, and strong initial production results being achieved on new wells resulting from optimized completion technologies. Additionally, production from our South region properties in the STACK play increased 1,614 MBbls, or 104%, from 2016 due to additional wells being completed and producing as a resultgrants of an increase in our drilling and completion activities in that area. These increases were partially offset by decreased production from our North region properties in Montana Bakken and the Red River units due to natural declines in productionrestricted stock awards coupled with reduced drilling activities. Montana Bakken crude oil production decreased 692 MBbls, or 24%, while crude oil production in the Red River units decreased 344 MBbls, or 9%, compared to 2016. Additionally, crude oil production in SCOOP decreased 1,081 MBbls, or 16%, due to natural declines in production and limited drilling activities.


The 17% increase in natural gas production in 2017 compared to 2016 was primarily due to increased production from our properties in the STACK play due to additional wells being completed and producing. Natural gas production in STACK increased 32,342 MMcf, or 116%, compared to 2016. Additionally, natural gas production in North Dakota Bakken increased 8,700 MMcf, or 17%, in conjunction with the aforementioned increase in crude oil production. These increases were partially offset by reduced production from our SCOOP properties, which decreased 3,469 MMcf, or 3%, along with various other areas in our North and South regions due to natural declines in production and limited drilling activities. Further, natural gas production decreased 1,323 MMcf in 2017 as a result of the sale of substantially all of our Arkoma Woodford properties in September 2017.

The increase in natural gas production as a percentage of our total production from 41% in 2016 to 43% in 2017 primarily resulted from the significant increase in STACK natural gas production due to the increased allocation of capital to that area in 2017.
Revenues
Net crude oil and natural gas sales. Net crude oil and natural gas sales for 2017 were $2.98 billion, a 47% increase from sales of $2.03 billion for 2016 due to a 32% increase in realized commodity prices coupled with a 12% increase in total sales volumes.
Our crude oil net sales prices averaged $45.70 per barrel for 2017, an increase of 29% compared to $35.51 for 2016 due to higher crude oil market prices and improved price realizations. The differential between NYMEX WTI calendar month crude oil prices and our realized crude oil prices averaged $5.50 per barrel for 2017 compared to $7.33 for 2016. The improved differential was primarily due to improved realizations resulting from new pipeline takeaway capacity and additional markets becoming available in 2017 for Bakken production, along with the growth in our South region production which typically has lower transportation costs compared to the Bakken due to its relatively close proximity to regional refineries and the crude oil trading hub in Cushing, Oklahoma. These factors led to a continued improvement in crude oil price realizations throughout 2017. Our crude oil price differentials relative to WTI prices improved to $4.23 per barrel in the 2017 fourth quarter.
Our natural gas net sales prices averaged $2.93 per Mcf for 2017, a 57% increase compared to $1.87 per Mcf for 2016 due to higher market prices for natural gas and NGLs and improved price realizations. The discount between our realized natural gas net sales prices and NYMEX Henry Hub calendar month natural gas prices improved from $0.61 per Mcf for 2016 to $0.16 per Mcf for 2017. NGL prices increased over 2016 levels in conjunction with increased crude oil prices and other factors, resulting in improved price realizations for our natural gas sales stream, particularly in later months of 2017. Our realized natural gas net sales prices averaged $3.30 per Mcf in the 2017 fourth quarter, representing a premium of $0.37 per Mcf over Henry Hub benchmark prices for that period.
Total sales volumes for 2017 increased 9,313 MBoe, or 12%, compared to 2016, reflecting an increase in our pace of drilling and completion activities in 2017. For 2017, our crude oil sales volumes increased 8% compared to 2016 while our natural gas sales volumes increased 17%.
For the 2017 fourth quarter, net crude oil and natural gas sales totaled $1,017.7 million, representing a 44% increase from 2017 third quarter revenues of $704.8 million and a 72% increase from 2016 fourth quarter revenues of $591.8 million. Revenues for the 2017 fourth quarter were favorably impacted by improved commodity prices and price realizations late in the year. Our crude oil net sales prices averaged $51.16 per barrel in the 2017 fourth quarter compared to $43.27 for the 2017 third quarter and $42.23 for the 2016 fourth quarter. Our natural gas net sales prices averaged $3.30 per Mcf in the 2017 fourth quarter compared to $2.74 for the 2017 third quarter and $2.70 for the 2016 fourth quarter.
Derivatives. Changes in natural gas prices during 2017 had an overall favorable impact on the fair value of our derivatives, which resulted in positive revenue adjustments of $91.6 million for the year, representing $62.1 million of non-cash gains and $29.5 million of cash gains. 
Crude oil and natural gas service operations. Revenues associated with our crude oil and natural gas service operations increased $21.0 million, or 84%, from $25.2 million for 2016 to $46.2 million for 2017 due to an increase in industry production activities and changes in the nature, timing and extent of water handling and recycling activities between periods.
Operating Costs and Expenses
Production expenses. Production expenses increased $34.9 million, or 12%, from $289.3 million for 2016 to $324.2 million for 2017 due to an increase in the number of producing wells and higher workover-related activities aimed at enhancing production from producing properties. Production expenses on a per-Boe basis averaged $3.66 for 2017, consistent with $3.65 per Boe for 2016. Our per-unit production expenses decreased to $3.17 per Boe for the 2017 fourth quarter.


Production taxes. Production taxes increased $65.9 million, or 46%, to $208.3 million in 2017 compared to $142.4 million in 2016 due to higher crude oil and natural gas revenues resulting from increases in sales volumes and commodity prices over the prior year period. Production taxes as a percentage of net crude oil and natural gas sales averaged 7.0% for 2017, consistent with the 2016 average of 7.0%.
Our production tax rate increased in the second half of 2017 relative to the first half and averaged 7.3% for the 2017 fourth quarter. This increase primarily resulted from a significant increase in production and revenues being generated in North Dakota from increased well completions later in 2017, which has higher production tax rates compared to Oklahoma. Additionally, in 2017 new legislation was enacted in Oklahoma that increased the production tax rate from 1% to 4%, effective July 1, 2017, and again from 4% to 7%, effective December 1, 2017, on wells that began producing between July 1, 2011 and July 1, 2015, which contributed to an increase in our average production tax rate in the third and fourth quarters of 2017.
Exploration expenses. The following table shows the components of exploration expenses for the periods presented.
  Year ended December 31,
In thousands 2017 2016
Geological and geophysical costs $12,217
 $12,106
Exploratory dry hole costs 176
 4,866
Exploration expenses $12,393
 $16,972
Depreciation, depletion, amortization and accretion. Total DD&A decreased $33.8 million, or 2%, to $1.67 billion for 2017 compared to $1.71 billion for 2016 primarily due to an increase in the volume of proved developed reserves over which costs are depleted, the impact of which was partially offset by an increase in DD&A resulting from higher sales volumes in 2017. The following table shows the components of our DD&A on a unit of sales basis for the periods presented.
  Year ended December 31,
$/Boe 2017 2016
Crude oil and natural gas properties $18.57
 $21.09
Other equipment 0.25
 0.37
Asset retirement obligation accretion 0.07
 0.08
Depreciation, depletion, amortization and accretion $18.89
 $21.54
Upward revisions to proved developed reserves in 2017 due in part to an improvement in commodity prices contributed to a decrease in our DD&A rate for crude oil and natural gas properties in 2017 compared to 2016. Additionally, improvements in drilling efficiencies and optimized completion technologies over the past year have resulted in a significant improvement in the quantity of proved reserves found and developed per dollar invested, which also contributed to the reduction in our DD&A rate in 2017.     
Property impairments. Property impairments totaled $237.4 million for 2017, consistent with $237.3 million of impairments recognized in 2016. Higher proved property impairments in 2017 were offset by lower unproved property impairments as discussed below.
Proved property impairments totaled $82.3 million for 2017 compared to $2.9 million for 2016. The proved property impairments recognized in 2017, nearly all of which were recognized in the second quarter, were primarily concentrated in the Arkoma Woodford field for which we determined the carrying amount of the field was not recoverable from future cash flows and, therefore, was impaired at June 30, 2017.
Impairments of unproved properties decreased $79.4 million, or 34%, to $155.0 million in 2017 compared to $234.4 million for 2016. The decrease was due to a lower balance of unamortized leasehold costs in 2017 due to property dispositions and reduced land capital expenditures in recent years, along with changes in the timing and magnitude of amortization of undeveloped leasehold costs between periods resulting from changes in the Company’s estimates of undeveloped properties not expected to be developed before lease expiration.
General and administrative expenses. Total G&A expenses increased $22.1 million, or 13%, to $191.7 million in 2017 from $169.6 million in 2016. Total G&A expenses include non-cash charges for equity compensation of $45.9 million and $48.1 million for 2017 and 2016, respectively, the decrease of which resulted from changes in the timing and magnitude of forfeitures of unvested restricted stock between periods.in 2019 that resulted in lower equity compensation expense for that period.
G&A expenses other than equity compensation included in the total G&A expense figure above totaled $145.8$132.0 million for 2017, an increase2020, a decrease of $24.3$11.3 million, or 20%8%, compared to $121.5$143.3 million for 2016.2019. This increasedecrease was primarily due to an


increasea reduction in employee compensationbenefits and benefits in 2017other efforts to reduce spending in response to the stabilization and improvement insignificantly reduced commodity prices overand economic turmoil from the past year,COVID-19 pandemic, partially offset by higherlower overhead recoveries from joint interest owners due to increaseddriven by reduced drilling, completion, activities over the prior period.and production activities.
46


The following table shows the components of G&A expenses on a unit of sales basis for the periods presented.
  Year ended December 31,
$/Boe20202019
General and administrative expenses$1.20 $1.15 
Non-cash equity compensation0.59 0.42 
Total general and administrative expenses$1.79 $1.57 
   Year ended December 31,
$/Boe 2017 2016
General and administrative expenses $1.64
 $1.53
Non-cash equity compensation 0.52
 0.61
Total general and administrative expenses $2.16
 $2.14
The increase in equity compensation expenses on a per-Boe basis in 2020 was driven by an 11% decrease in total sales volumes with no similar reduction in equity compensation expenses, as such expenses continue to be recognized irrespective of sales volumes.
Interest expense. Interest expense decreased $26.1$11.2 million, or 8%4%, to $294.5$258.2 million in 2017 from $320.6for 2020 compared to $269.4 million in 2016for 2019 primarily due to a decrease in weighted average outstanding debt primarily as a result of the November 2016 redemptions of our $200 million of 7.375% 2020 Notes and $400 million of 7.125% 2021 Notes. Our weighted average outstanding long-term debt balance for 2017 was approximately $6.7 billion with a weighted average interest rate from changes in the mix of 4.2%outstanding debt between periods driven by the redemption or repurchase of senior notes over the past year using available cash and lower-rate credit facility borrowings. Our weighted average interest rate amounted to 4.3% for 2020 compared to averages4.5% for 2019.
Gain (loss) on extinguishment of $7.1 billiondebt. In 2020 we redeemed or repurchased a portion of our outstanding 2022 Notes, 2023 Notes, and 4.3%2024 Notes and recognized net gains totaling $35.7 million upon the redemptions and repurchases. See Part II, Item 8. Notes to Consolidated Financial Statements—Note 7. Long-Term Debt for 2016. The lower interest expense associated with reduced debt was partially offset by higher interest expense being incurred on our variable-rate credit facilityadditional discussion.
Income Taxes. For 2020 and term loan borrowings due to an increase in market interest rates in 2017.
Income Taxes. Our income before2019 we provided for income taxes totaled $156.1 million for the year ended December 31, 2017, nearly allat a combined federal and state tax rate of which was24.5% of pre-tax income generated by our operations in the United States. We provided for income taxes on this amount at a combined federal and state tax rate of 38% of pre-tax income generated in the United States and 25% of immaterial pre-tax losses generated by our operations in Canada. The application of these statutory tax rates to pre-tax earnings, combined with the impact of permanent taxable differences, valuation allowances, tax effects from stock-based compensation, and other items resulted in the recognition of $80.3 million of income tax expense for 2017. Additionally, the aforementioned remeasurement of our deferred income tax balances at year-end 2017 in response to the enactment of the Tax Cuts and Jobs Act resulted in a one-time decrease in income tax expense via the recognition of an income tax benefit totaling approximately $713.7 million. Upon combining the tax benefit from this remeasurement with the tax provision recognized on pre-tax earnings from operations, we recognized a net total income tax benefit of $633.4 million for 2017.
For 2016, we recorded an income tax benefit of $232.8$169.2 million resultingand an income tax provision of $212.7 million for 2020 and 2019, respectively, which resulted in an effective tax raterates of 37%21.8% and 21.5%, respectively, after taking into account the application of a combined statutory tax rate of 38%,rates, permanent taxable differences, tax effects from stock-basedequity compensation, valuation allowances, tax effects from the 2019 sale of our Canadian operations, and other items. See Part II, Item 8. Notes to Consolidated Financial Statements—Note 10. Income Taxes for a summary of the sources and tax effects of items comprising our income tax provision and resulting effective tax rates for 2020 and 2019.
Liquidity and Capital Resources
Our primary sources of liquidity have historically been cash flows generated from operating activities, financing provided by our revolving credit facility and the issuance of debt securities. Additionally, in recent years asset dispositions and joint development arrangements have provided a source of cash flow for use in reducing debt and enhancing liquidity. In light of the challenges facing our business and industry, we remain committed to operating in a responsible manner to preserve financial flexibility, liquidity, and the strength of our balance sheet. We intend to continue reducing our long-term debt using available cash flows from operations and/or proceeds from additional potential sales of non-strategic assets or through joint development arrangements; however, no assurance can be given that such transactions will occur.
At January 31, 2021, we had approximately $1.13 billion of borrowing availability under our credit facility after considering outstanding borrowings and letters of credit. Our credit facility, which is unsecured and has no borrowing base subject to redetermination, does not mature until April 2023. Further, we have no senior note maturities in the next 12 months, with our earliest scheduled maturity being our $230.8 million of 2022 Notes due in September 2022. 
Based on our planned capital spending, our forecasted cash flows and projected levels of indebtedness, we expect to maintain compliance with the covenants under our revolving credit facility and senior note indentures for at least the next 12 months.indentures. Further, based on current market indications, we expect to meet in the ordinary course of business other contractual cash commitments to third parties pursuant to the various agreements subsequently described under the heading Contractual Obligations, recognizing we may be required to meet such commitments even if our business plan assumptions were to change. We monitor our capital spending closely based on actual and projected cash flows and have the ability to reduce spending or dispose of assets to preserve liquidity and financial flexibility if needed to fund our operations.
47


Cash Flows
Cash flows from operating activities
OurNet cash provided by operating activities totaled $1.42 billion and $3.12 billion for 2020 and 2019, respectively, reflecting a significant decrease in our operating cash flows due to the previously described decrease in market prices and our voluntary curtailment of production in the second and third quarters which adversely impacted our 2020 operating results. As a result of our resumed production and improved commodity prices late in the year, our net cash provided by operating activities totaled $3.46 billion and $2.08 billionincreased to $487.5 million for 2018 and 2017, respectively. The increase inthe fourth quarter of 2020, an improvement of $196.3 million, or 67%, compared to $291.2 million of operating cash flows was primarily due to an increasegenerated in crude oil and natural gas revenues resulting from higher realized commodity prices and total sales volumes in 2018, the effectsthird quarter of which were partially offset by increases in production expenses, production taxes, and cash losses on matured natural gas derivatives, as well as the litigation settlement payment described in Part II, Item 8. Notes to Consolidated Financial Statements—Note 11. Commitments and Contingencies–Litigation.


2020.
Cash flows used in investing activities
For 2018 and 2017, we hadNet cash flows used in investing activities of $2.86totaled $1.51 billion and $1.81$2.77 billion for 2020 and 2019, respectively, reflecting the increase of which was due to an increasesignificant decrease in our capital budget and related drilling and completion activities in 2018.2020 prompted by the decrease in crude oil prices and economic uncertainty from the COVID-19 pandemic.
Cash flows from financing activities
Net cash provided by financing activities for 2020 totaled $97.1 million, primarily consisting of $1.48 billion of net proceeds received from our November 2020 issuance of 5.75% senior notes due 2031, $105.0 million of net credit facility borrowings, and net proceeds of $26.0 million from new term loans executed during the year. These totals include cash capital expenditures of $2.91 billion and $1.95 billion, respectively, inclusive of exploration and development drilling, property acquisitions, and leasing activities. Additionally, the 2018 amount includes consolidated mineral acquisitions by our less-than-wholly-owned subsidiary TMRC II, of which 80% was reimbursed to the Company by Franco-Nevada under the new relationship described in Part II, Item 8. Notes to Consolidated Financial Statements—Note 15. Noncontrolling Interests.
The use of cash for capital expenditures wasincreases were partially offset by $1.34 billion of senior note repurchases and redemptions during the year using available cash and proceeds received from asset dispositions, which totaled $54.5our issuance of 2031 Notes, $25.2 million of premiums and $144.4costs paid upon the redemptions and repurchases, $126.9 million for 2018of cash used to repurchase shares of our common stock, and 2017, respectively. See Part II, Item 8. Notes to Consolidated Financial Statements—Note 16. Property Dispositions for a discussion$18.5 million of notable dispositions.
Cash flows used in financing activitiescash dividends paid on common stock.
Net cash used in financing activities for 20182019 totaled $356.9$587.1 million primarily resulting from a $585.4$441.8 million net reduction in total outstanding debt using availabledue in part to our partial redemption of 2022 Notes in September 2019. Additionally, $18.4 million of cash flows from operationswas used to fund our inaugural dividend payment in November 2019 and proceeds from asset dispositions. Cash$190.2 million of cash was used to repurchase shares of our common stock. These cash outflows for debt reduction were partially offset by $267.9$109.1 million of contributions received from noncontrolling interests, primarily from Franco-Nevada for its ownership interest in TMRC II and forthe funding of its share of certain mineral acquisition costs.costs incurred by The Mineral Resources Company II.
Net cash used in financing activities for 2017 totaled $243.0 million, primarily resulting from a reduction in total outstanding debt using available cash flows from operations and proceeds from asset dispositions. We received $990 million of net proceeds from our December 2017 issuance of 4.375% Senior Notes due 2028, which were used to repay in full and terminate our then existing $500 million term loan and to repay a portion of the borrowings then outstanding under our revolving credit facility, thereby resulting in no significant net change in cash flows from financing activities in 2017 related to these activities.
Future Sources of Financing
Although we cannot provide any assurance, we believe funds from operating cash flows our remaining cash balance and availability under our revolving credit facility should be sufficient to meet our cash requirements inclusive of, but not limited to, normal operating needs, debt service obligations, planned capital expenditures, and commitments for at least the next 12 months.
UnderOur 2021 capital budget is reflective of the current commodity price environment and, based on our planned capital expenditures for 2019current expectations of commodity prices and costs, is expected to be funded from operating cash flows. Any cash flow deficiencies are expected to be funded entirely from operating cash flows. Additionally, we expect to generate cash flows in excess of operating and capital needs, which we plan to apply toward further reduction of debt in the future.
We currently anticipate we will be able to generate or obtain funds sufficient to meetby borrowings under our short-term and long-term cash requirements.credit facility. If cash flows are materially impacted by declines in commodity prices, we have the ability to reduce our capital expenditures or utilize the availability of our revolving credit facility if needed to fund our operations.operations and business plans. We may choose to access thebanking or capital markets for additional financing or capital to fund our operations or take advantage of business opportunities that may arise.arise, although uncertainties existing in the financial markets as a result of the COVID-19 pandemic and other factors may increase the expense and difficulty of completing a bank or capital markets financing. Additionally, the terms available to the Company in connection with such a financing transaction may be less favorable than those enjoyed by the Company prior to the COVID-19 pandemic, although the degree, if any, by which such terms may change cannot be predicted at this time. Further, we may sell additional assets or enter into strategic joint development opportunities in order to obtain funding for our operations and capital program if such transactions can be executed on satisfactory terms. However, no assurance can be given that such transactions will occur.
Revolving
In March 2020, our corporate credit rating was downgraded by Standard & Poor's Ratings Services ("S&P") in response to weakened oil and gas industry conditions and resulting revisions made to rating agency commodity price assumptions. Such downgrade negatively impacted our cost of capital and increased our borrowing costs under our credit facility. Also in March 2020, our corporate credit ratings were reaffirmed by both Moody's Investor Services and Fitch Ratings. Such ratings are subject to ongoing review and adjustment.
48


Credit facility
We have an unsecured credit facility, maturing in April 2023, with aggregate lender commitments totaling $1.5 billion. The commitments are from a syndicate of 14 banks and financial institutions. We believe each member of the current syndicate has the capability to fund its commitment.
As of January 31, 2019,2021, we had no$360 million of outstanding borrowings and approximately $1.5$1.13 billion of borrowing availability on our credit facility.
The commitments under our credit facility are not dependent on a borrowing base calculation subject to periodic redetermination based on changes in commodity prices and proved reserves. Additionally, downgrades or other negative rating actions with respect to our credit rating, wouldsuch as the downgrade by S&P that occurred in March 2020 in response to weakened oil and gas industry conditions, do not trigger a reduction in our current credit facility commitments, nor woulddo such actions trigger a security requirement or change in covenants. DowngradesThe downgrade of our credit rating will,did, however, trigger increasesa 0.25% increase in our credit facility’sfacility's interest ratesrate and prompted a 0.05% increase in the rate of commitment fees paid on unused borrowing availability under certain circumstances.availability.
Our credit facility contains restrictive covenants that may limit our ability to, among other things, incur additional indebtedness, incur liens, engage in sale and leaseback transactions, or merge, consolidate or sell all or substantially all of our assets. Our credit facility also contains a requirement that we maintain a consolidated net debt to total capitalization ratio of no


greater than 0.65 to 1.00. See Part II, Item 8. Notes to Consolidated Financial Statements—Note 7. Long-Term Debt for a discussion of how this ratio is calculated pursuant to our revolving credit agreement.
We were in compliance with our credit facility covenants at December 31, 20182020 and expect to maintain compliance for at least the next 12 months.compliance. At December 31, 2018,2020, our consolidated net debt to total capitalization ratio was 0.430.42 to 1.00. We do not believe the credit facility covenants are reasonably likely to limit our ability to undertake additional debt financing to a material extent if needed to support our business.
Joint development agreement funding
In September 2014, we enteredAt December 31, 2020, our total debt would have needed to independently increase by approximately $8.4 billion above the existing level at that date (with no corresponding increase in cash or reduction in refinanced debt) to reach the maximum covenant ratio of 0.65 to 1.00. Alternatively, our total shareholders' equity would have needed to independently decrease by approximately $4.5 billion (excluding the after-tax impact of any non-cash impairment charges) below the existing level at December 31, 2020 to reach the maximum covenant ratio. These independent point-in-time sensitivities do not take into an agreement with a U.S. subsidiaryaccount other factors that could arise to mitigate the impact of SK E&S Co. Ltd (“SK”) of South Korea to jointly develop a portion of the Company’s STACK properties. Pursuant to the agreement SK will fund, or carry, 50% of our drillingchanges in debt and completion costs attributable to an area of mutual interest in the STACK play until approximately $270 million has been expended by SKequity on our behalf. Asconsolidated net debt to total capitalization ratio, such as disposing of December 31, 2018, approximately $30 million of the carry had yet to be realized and is expected to be realized in 2019.
Strategic mineral relationship
See Part II, Item 8. Notes to Consolidated Financial Statements—Note 15. Noncontrolling Interests for discussion of the capital requirements and futureassets or exploring alternative sources of financing associated with our strategic relationship with Franco-Nevada to acquire oil and gas mineral interests in the SCOOP and STACK plays through year-end 2021.capitalization.
Future Capital Requirements
Senior notes
In January 2021, we redeemed an additional $400 million principal amount of our outstanding 2022 Notes using proceeds from lower-rate credit facility borrowings. Our debt includes outstanding senior note obligations totaling $5.8now total $5.0 billion at DecemberJanuary 31, 2018.2021. We have no senior note maturities in the next 12 months, with our earliest scheduled maturity being our $230.8 million of remaining 2022 Notes due in September 2022. Our senior notes are not subject to any mandatory redemption or sinking fund requirements. For further information on the face values, maturity dates, semi-annual interest payment dates, optional redemption periods and covenant restrictions related to our senior notes, refer to Part II, Item 8. Notes to Consolidated Financial Statements—Note 7. Long-Term Debt.
In August 2018, we redeemed $400 million of our $2.0 billion of 5% Senior Notes due 2022. Under the current commodity price environment we expect to generate cash flows in excess of operating and capital needs, which we plan to apply toward further redemption of our 2022 Notes in the future, the timing of which is uncertain.
We were in compliance with our senior note covenants at December 31, 20182020 and expect to maintain compliance for at least the next 12 months.compliance. We do not believe the senior note covenants will materially limit our ability to undertake additional debt financing. Downgrades or other negative rating actions with respect to the credit ratings assigned to our senior unsecured debt, wouldsuch as the downgrade by S&P that occurred in March 2020, do not trigger additional senior note covenants.
Mineral acquisition relationship
In October 2018, Continental entered into a strategic relationship with Franco-Nevada Corporation to acquire oil and gas mineral interests within an area of mutual interest through a minerals subsidiary named The Mineral Resources Company II, LLC ("TMRC II"). Under the relationship, the parties have committed to spend up to a remaining aggregate total of $153 million to acquire mineral interests. Continental agreed to fund 20% of future mineral acquisitions and will be entitled to receive between 25% and 50% of total revenues generated by TMRC II based upon performance relative to predetermined production targets, while Franco-Nevada will fund 80% of future acquisitions and will be entitled to receive between 50% and 75% of TMRC II's revenues. Based upon production targets achieved to date, Continental is currently earning 50% of TMRC II's revenues and such allocation is expected to continue through at least year-end 2021.
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Capital expenditures
We evaluate opportunities2020
Our original capital budget for 2020 was $2.65 billion, excluding acquisitions, which was reduced to purchase or sell$1.2 billion in March 2020 in response to the significant decrease in crude oil prices resulting from the COVID-19 pandemic and natural gas propertiesother factors. We significantly reduced our drilling and expectcompletion activities in order to participate aspreserve our assets and better align our spending with expected available cash flows. As a buyer or sellerresult of properties at various times. We seek acquisitions that utilizethese actions, our technical expertise or offer opportunitiesnon-acquisition capital spending was reduced by 56% in 2020 compared to expand our existing core areas.2019.
For the year ended December 31, 2018,2020, we invested $2.8$1.16 billion in our capital program excluding $84.8$204.0 million of unbudgeted acquisitions and including $14.7excluding $133.9 million of capital costs associated with increasedreduced accruals for capital expenditures.expenditures as compared to December 31, 2019. Our 20182020 capital expenditures were allocated as follows by quarter:  

In millions1Q 20202Q 20203Q 20204Q 2020Total 2020
Exploration and development$544.0 $155.8 $120.9 $151.0 $971.7 
Land costs (1)39.9 8.9 6.1 3.5 58.4 
Capital facilities, workovers and other corporate assets63.0 25.8 22.4 13.5 124.7 
Seismic3.8 0.3 — 0.1 4.2 
Capital expenditures, excluding acquisitions$650.7 $190.8 $149.4 $168.1 $1,159.0 
Acquisitions of producing properties19.3 0.1 4.0 37.1 60.5 
Acquisitions of non-producing properties10.6 — 0.1 132.8 143.5 
Total acquisitions (2)29.9 0.1 4.1 169.9 204.0 
Total capital expenditures$680.6 $190.9 $153.5 $338.0 $1,363.0 

(1)    Full year 2020 amount includes $24 million of mineral acquisitions made by TMRC II, of which $19 million was recouped from Franco-Nevada.
(2)    The 2020 fourth quarter amount includes our October 2020 acquisition of undeveloped leasehold and producing properties in the SCOOP play for $162.8 million and excludes the $21.5 million escrow deposit paid on December 31, 2020 associated with a pending property acquisition as discussed in Part II, Item 8. Notes to Consolidated Financial Statements—Note 12. Commitments and Contingencies.
In millions1Q 20182Q 20183Q 20184Q 2018Total 2018
Exploration and development$496.3
$627.9
$633.5
$611.0
$2,368.7
Land costs (1)67.0
44.9
105.5
59.0
276.4
Capital facilities, workovers and other corporate assets33.0
41.4
51.8
72.6
198.8
Seismic




Capital expenditures, excluding acquisitions$596.3
$714.2
$790.8
$742.6
$2,843.9
Acquisitions of producing properties2.6
21.5
1.4
6.1
31.6
Acquisitions of non-producing properties (1)28.0
21.6
2.0
1.6
53.2
Total acquisitions30.6
43.1
3.4
7.7
84.8
Total capital expenditures$626.9
$757.3
$794.2
$750.3
$2,928.7
2021 Capital Budget
(1)These captions include costs incurred during 2018 to acquire minerals, which, along with minerals acquired prior to 2018, were contributed to our newly-formed subsidiary TMRC II in October 2018 as part of the transaction with Franco-Nevada.
In 2021, we will remain committed to operating in a disciplined, capital-efficient manner in light of continued volatility in commodity prices. Our 2021 capital expenditures budget for 2019 is $2.6 billion, which is expected to be allocated as reflected in the table below. Acquisition expenditures are not budgeted, with the exception of planned levels of spending for mineral acquisitions made in conjunction with our relationship with Franco-Nevada.
In millions2019 Budget
Exploration and development$2,165
Land costs (1)205
Capital facilities, workovers and other corporate assets228
Seismic2
Total 2019 capital budget$2,600
(1)In millionsIncludes $125 million of planned spending for mineral2021 Budget
Exploration and development$1,112 
Land costs85 
Mineral acquisitions by TMRC II. With a carry structure in place,attributable to Continental will recoup $100 million, or 80%, of such spending from Franco-Nevada.(1)13 
Capital facilities, workovers, water infrastructure, and other corporate assets186 
Seismic
2021 capital budget attributable to Continental$1,400 
Mineral acquisitions attributable to Franco-Nevada (1)52 
Total 2021 capital budget (2)$1,452 

(1)    Represents planned spending for mineral acquisitions by TMRC II under our relationship with Franco-Nevada Corporation. Continental holds a controlling financial interest in TMRC II and therefore consolidates the financial results and capital expenditures of the entity. With a carry structure in place, Continental will fund 20% of 2021 planned spending, or $13 million, and Franco-Nevada will fund the remaining 80%, or $52 million.
(2)    Excludes the Company's pending acquisition of properties in the Powder River Basin of Wyoming for $215 million discussed in Part II, Item 8. Notes to Consolidated Financial Statements—Note 12. Commitments and Contingencies.
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Our drilling and completion activities and the actual amount and timing of our capital expenditures may differ materially from our budget as a result of, among other things, available cash flows, unbudgeted acquisitions, actual drilling and completion results, operational process improvements, the availability of drilling and completion rigs and other services and equipment, the availability of transportation, gathering and processing capacity, changes in commodity prices, and regulatory, technological and competitive developments. We monitor our capital spending closely based on actual and projected cash flows and may scale back our spending should commodity prices decrease from current levels. Conversely, an increase in commodity prices from current levels could result in increased capital expenditures. We expect to continue participating as a buyer of properties when and if we have the ability to increase our position in strategic plays at competitive terms.


Contractual Obligations
The following table presents our contractual obligations and commitments on an undiscounted basis as of December 31, 2018.2020.
 Payments due by period
In thousandsTotalLess than
1 year (2021)
Years 2 and 3
(2022-2023)
Years 4 and 5
(2024-2025)
More than
5 years
Credit facility borrowings (1)$160,000 $— $160,000 $— $— 
Senior Notes (1)(2)5,391,407 — 1,280,407 911,000 3,200,000 
Notes payable (3)24,696 2,245 4,736 5,082 12,633 
Interest payments and commitment fees (4)2,316,057 266,929 482,793 346,997 1,219,338 
Asset retirement obligations (5)179,676 2,482 22,760 1,141 153,293 
Operating leases and other (6)33,236 15,514 7,536 1,428 8,758 
Drilling rig commitments (7)14,099 14,099 — — — 
Transportation and processing commitments (8)1,450,873 226,804 513,243 364,819 346,007 
Total contractual obligations$9,570,044 $528,073 $2,471,475 $1,630,467 $4,940,029 
(1)On January 5, 2021, we redeemed $400 million principal amount of our outstanding 2022 Notes using proceeds from borrowings on our credit facility. Such activity is not reflected in the table above.
(2)Amounts represent scheduled maturities of our senior note obligations at December 31, 2020 and do not reflect any discount or premium at which the senior notes were issued or any debt issuance costs.
(3)Represents future principal payments on two 10-year amortizing notes payable secured by the Company’s corporate office building and its interest in parking facilities in Oklahoma City, Oklahoma and does not reflect any debt issuance costs. Principal and interest are payable monthly through the loans' maturity dates in May 2030.
(4)Interest payments include scheduled cash interest payments on the senior notes and notes payable, as well as estimated interest payments and commitment fees on unused borrowing availability under our credit facility assuming the $1.33 billion of availability as of December 31, 2020 continues through the April 2023 maturity date of the facility.
(5)Amounts represent estimated discounted costs for future dismantlement and abandonment of our crude oil and natural gas properties. See Part II, Item 8. Notes to Consolidated Financial Statements—Note 1. Organization and Summary of Significant Accounting Policies for additional discussion of our asset retirement obligations.
(6)Amounts primarily represent commitments for electric infrastructure, surface use agreements, office buildings and equipment, communication towers, field equipment,and purchase obligations mainly related to software services. A portion of these costs will be borne by other interest owners. Due to variations in well ownership, our net share of these costs cannot be determined with certainty. These amounts include minimum payment obligations on enforceable commitments with durations in excess of one year with a discounted present value totaling $6.4 million that qualify as leases and were recognized on our balance sheet at December 31, 2020 in accordance with ASC Topic 842.
(7)Amounts represent operating day-rate commitments under drilling rig contracts with various terms extending toMay 2021. A portion of these costs will be borne by other interest owners, the amount of which cannot be determined with certainty. These amounts include minimum payment obligations with a discounted present value totaling $2.0 million that qualify as leases and were recognized on our balance sheet at December 31, 2020in accordance with ASC Topic 842.
(8)We have entered into transportation and processing commitments to guarantee capacity on crude oil and natural gas pipelines and natural gas processing facilities. These commitments require us to pay per-unit transportation or processing charges regardless of the amount of capacity used. We are not committed under these contracts to deliver fixed and determinable quantities of crude oil or natural gas in the future. A portion of these costs will be borne by other interest owners, the amount of which cannot be determined with certainty. These commitments do not qualify as leases under ASC Topic 842 and are not recognized on our balance sheet.

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  Payments due by period
In thousands Total Less than
1 year (2019)
 Years 2 and 3
(2020-2021)
 Years 4 and 5
(2022-2023)
 More than
5 years
Arising from arrangements on the balance sheet: 
 
 
 
 
Revolving credit facility borrowings $
 $
 $
 $
 $
Senior Notes (1) 5,800,000
 
 
 3,100,000
 2,700,000
Note payable (2) 7,735
 2,360
 4,950
 425
 
Interest payments and commitment fees (3) 2,136,254
 266,762
 533,293
 417,174
 919,025
Asset retirement obligations (4) 141,360
 4,374
 16,401
 2,114
 118,471
Litigation settlement (5) 19,753
 19,753
 
 
 
Arising from arrangements not on balance sheet: (6) 
 
 
 
 
Operating leases and other (7) 30,389
 9,062
 9,040
 5,492
 6,795
Drilling rig commitments (8) 107,241
 106,130
 1,111
 
 
Transportation and processing commitments (9) 1,832,002
 241,253
 527,378
 496,969
 566,402
Total contractual obligations $10,074,734
 $649,694
 $1,092,173
 $4,022,174
 $4,310,693
(1)Amounts represent scheduled maturities of our senior note obligations at December 31, 2018 and do not reflect any discount or premium at which the senior notes were issued or any debt issuance costs.
(2)Represents future principal payments on a 10-year amortizing note payable secured by the Company’s corporate office building in Oklahoma City, Oklahoma and does not reflect any debt issuance costs. Principal and interest are payable monthly through the loan’s maturity date of February 26, 2022.
(3)Interest payments include scheduled cash interest payments on the senior notes and note payable, as well as estimated commitment fees on unused borrowing availability under our credit facility assuming the $1.5 billion of availability as of December 31, 2018 continues through the April 2023 maturity date of the facility.
(4)
Amounts represent estimated discounted costs for future dismantlement and abandonment of our crude oil and natural gas properties. See Part II, Item 8. Notes to Consolidated Financial Statements—Note 1. Organization and Summary of Significant Accounting Policies for additional discussion of our asset retirement obligations.
(5)
See Part II, Item 8. Notes to Consolidated Financial Statements—Note 11. Commitments and Contingencies—Litigation for discussion of this litigation settlement obligation.
(6)The commitment amounts included in this section primarily represent costs associated with wells operated by the Company. A portion of these costs will be borne by other interest owners. Due to variations in well ownership, our net share of these costs cannot be determined with certainty.
(7)
Amounts primarily represent commitments for electric infrastructure, surface use agreements, office buildings and equipment, communication towers, field equipment, sponsorship agreements, and purchase obligations mainly related to software services. These amounts include minimum payment obligations on enforceable commitments with durations in excess of one year at a discounted present value totaling $6 million that qualify as leases and were recognized on our balance sheet on January 1, 2019 upon adoption of ASU 2016-02, Leases, as discussed in Note 1. Organization and Summary of Significant Accounting Policies–New accounting pronouncements not yet adopted at December 31, 2018–Leases.
(8)
Amounts represent operating day-rate commitments under drilling rig contracts with various terms extending to February 2020 to ensure rig availability in our key operating areas. These amounts include minimum payment obligations expected to be incurred in 2019 and 2020 at a discounted present value totaling $13 million that qualify as leases and were recognized on our balance sheet on January 1, 2019 upon adoption of ASU 2016-02.
(9)We have entered into transportation and processing commitments to guarantee capacity on crude oil and natural gas pipelines and natural gas processing facilities. These commitments require us to pay per-unit transportation or processing charges regardless of the amount of capacity used. We are not committed under these contracts to deliver fixed and determinable quantities of crude oil or natural gas in the future. These commitments do not qualify as leases to be recognized on our balance sheet under ASU 2016-02 beginning January 1, 2019.

On December 31, 2020, we executed a definitive agreement to acquire undeveloped leasehold and producing properties in the Powder River Basin of Wyoming for $215 million of cash. Closing of the acquisition is scheduled to occur on or around March 4, 2021. This pending acquisition remains subject to the completion of customary due diligence procedures and closing conditions and is not reflected in the table above.

Delivery Commitments

We have various natural gas volume delivery commitments that are related to our North and South areas. We expect to primarily fulfill our contractual obligations with production from our proved reserves. However, we may purchase third-party volumes to satisfy our commitments. The volumes disclosed herein represent gross production associated with properties operated by us and do not reflect our net proportionate share of such amounts. As of December 31, 2020, we were committed to deliver the following fixed quantities of natural gas production.

Year EndingNatural Gas
December 31,Bcf
2021107
202237
202334
202434
202518
202615
Derivative Instruments
See Note 5. Derivative Instruments in Part II, Item 8. Notes to Consolidated Financial Statements for a summary of derivative instruments in place as of December 31, 2020. Between January 1, 20192021 and February 15, 201912, 2021 we entered into additional natural gas derivative instruments as summarized below. The hedged volumes reflected below represent an aggregation of multiple contracts that are expected to be realized ratably over the indicated period. Thesecontracts. The crude oil derivative instruments will be settled based upon reportedon NYMEX West Texas Intermediate pricing and natural gas derivative instruments will be settled based on NYMEX Henry Hub settlement prices. See pricing.
Natural gas derivativesSwaps Weighted Average Price
Period and Type of ContractMMBtus
April 2021 - December 2021
Swaps - Henry Hub64,120,000 $2.88 
Collars
Crude oil derivativesSwaps Weighted Average PriceFloorsCeilings
Period and Type of ContractBblsRangeWeighted Average PriceRangeWeighted Average Price
March 2021 - December 2021
NYMEX Roll Swaps6,885,000 $0.39 
January 2021- May 2021
Swaps - WTI5,310,000 $52.50 
March 2021 - April 2021
Collars - WTI915,000 $45.00 - $50.00$47.46 $53.80 - $55.10$54.44 
Dividend payments
To preserve cash in response to the significant reduction in crude oil prices and economic uncertainty resulting from the COVID-19 pandemic, in April 2020 the Company’s quarterly dividend was suspended by the Board of Directors.
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Share repurchase program
In May 2019 our Board of Directors approved the initiation of a share repurchase program to acquire up to $1 billion of our common stock beginning in June 2019. Through December 31, 2020, we had repurchased and retired a cumulative total of approximately 13.8 million shares at an aggregate cost of $317.1 million since the inception of the program. The timing and amount of the Company's share repurchases are subject to market conditions and management discretion. The share repurchase program does not require the Company to repurchase a specific number of shares and may be modified, suspended, or terminated by the Board of Directors at any time. To preserve cash in the current environment, we do not expect to engage in significant share repurchase activity in the near term.
Senior note repurchases
As discussed in Note 7. Long-Term Debt and Note 21. Subsequent Event in Part II, Item 8. Notes to Consolidated Financial Statements—Note 5. Derivative Instruments for further discussionStatements, in 2020 and early 2021 we repurchased a portion of our hedging activities, including a summaryoutstanding senior notes. From time to time we may seek to execute additional repurchases of derivative contractsour senior notes for cash in place as of December 31, 2018.open market transactions, privately negotiated transactions, or otherwise. Such repurchases will depend on prevailing market conditions, our liquidity and prospects for future access to capital, and other factors. The amounts involved in any such transactions, individually or in the aggregate, may be material.
    Swaps Weighted Average Price
    
Period and Type of Contract MMBtus 
April 2019 - December 2019    
Swaps - Henry Hub 63,250,000
 $2.83
Critical Accounting Policies and Estimates
Our consolidated financial statements and related footnotes contain information that is pertinent to our management’s discussion and analysis of financial condition and results of operations. The preparation of financial statements in conformity with generally accepted accounting principles requires management to select appropriate accounting policies and to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues, expenses, and the disclosure and estimation of contingent assets and liabilities. See Part II, Item 8. Notes to Consolidated Financial Statements—Note 1. Organization and Summary of Significant Accounting Policies and Note 8. Revenues for descriptions of our major accounting policies. Certain of these accounting policies involve judgments and uncertainties to such an extent that there is a reasonable likelihood that materially different amounts could have been reported under different conditions or if different assumptions had been used.
In management’s opinion, the most significant reporting areas impacted by management’s judgments and estimates are crude oil and natural gas reserve estimations, revenue recognition, the choice of accounting method for crude oil and natural gas activities and derivatives, impairment of assets, income taxes and contingent liabilities. These areas are discussed below. Management’s judgments and estimates in these areas are based on information available from both internal and external sources, including engineers, geologists and historical experience in similar matters and are believed to be reasonable under the circumstances. We evaluate our estimates and assumptions on a regular basis. Actual results could differ from the estimates as additional information becomes known.
Crude Oil and Natural Gas Reserves Estimation and Standardized Measure of Future Cash Flows
Our external independent reserve engineers, Ryder Scott, and internal technical staff prepare the estimates of our crude oil and natural gas reserves and associated future net cash flows. Even though Ryder Scott and our internal technical staff are knowledgeable and follow authoritative guidelines for estimating reserves, they must make a number of subjective assumptions based on professional judgments in developing the reserve estimates. Estimates of reserves and their values, future production rates, and future costs and expenses are inherently uncertain for various reasons, including many factors beyond the Company’s control. Reserve estimates are updated by us at least semi-annually and take into account recent production levels and other technical information about each of our properties.
Crude oil and natural gas reserve engineering is a subjective process of estimating underground accumulations of crude oil and natural gas that cannot be precisely measured. The accuracy of any reserve estimate is a function of the quality of available data and of engineering and geological interpretation and judgment. Periodic revisions or removals of estimated reserves and future cash flows may be necessary as a result of a number of factors, including reservoir performance, new drilling, crude oil and natural gas prices, changes in costs, technological advances, new geological or geophysical data, changes in business strategies, or other economic factors. Accordingly, reserve estimates may differ significantly from the quantities of crude oil and natural gas ultimately recovered. For the years ended December 31, 2018, 2017,2020, 2019, and 2016,2018, net downward revisions and removals of our proved reserves totaled approximately 269505 MMBoe,82 149 MMBoe, and 110269 MMBoe, respectively. We cannot predict the amounts or timing of future reserve revisions or removals.
Estimates of proved reserves are key components of the Company’s most significant financial estimates including the computation of depreciation, depletion, amortization and impairment of proved crude oil and natural gas properties. Holding all other factors constant, if proved reserves are revised downward, the rate at which we record DD&A expense would increase, reducing net income. Conversely, if proved reserves are revised upward, the rate at which we record DD&A expense would
53


decrease. Future revisions of reserves may be material and could significantly alter future depreciation, depletion, and amortization expense and may result in material impairments of assets.


At December 31, 2018,2020, our proved reserves totaled 1,5221,104 MMBoe as determined using 12-month average first-day-of-the-month prices of $65.56$39.57 per barrel for crude oil and $3.10$1.99 per MMBtu for natural gas. Actual future prices may be materially higher or lower than those used in our year-end estimates. NYMEX WTI crude oil and Henry Hub natural gas first-day-of-the-month commodity prices for January 1, 20192021 and February 1, 20192021 averaged $50.34$51.04 per barrel and $3.03$2.53 per MMBtu, respectively.
Holding all other factors constant, if crude oil prices used in our year-end reserve estimates were decreasedincreased to $45$50 per barrel our proved reserves at December 31, 20182020 could decreaseincrease by approximately 9252 MMBoe, or 6%5%, representing a 5% decrease7% increase in proved developed producing reserves averaged with a 7% decrease2% increase in PUD reserves. If the decreaseincrease in proved reserves under this oil price sensitivity existed throughout 2018,2020, our DD&A expense for 20182020 would have increaseddecreased by an estimated 5%7%.
Holding all other factors constant, if natural gas prices used in our year-end reserve estimates were decreasedincreased to $2.00$2.50 per MMBtu our proved reserves at December 31, 20182020 could decreaseincrease by approximately 3121 MMBoe, or 2%, representing a 1% decrease3% increase in proved developed producing reserves averaged with a 3% decrease1% increase in PUD reserves. If the decreaseincrease in proved reserves under this gas price sensitivity existed throughout 2018,2020, our DD&A expense for 20182020 would have increaseddecreased by an estimated 1%3%.
Our DD&A calculations for oil and gas properties are performed on a field basis and revisions to proved reserves will not necessarily be applied ratably across all fields and may not be applied to some fields at all. Further, reserve revisions in significant fields may individually affect our DD&A rate. As a result, the impact on DD&A expense from revisions in reserves cannot be predicted with certainty and may result in changes in expense that are greater or less than the underlying changes in reserves.
See Part I, Item 1. Business—Crude Oil and Natural Gas Operations—Proved Reserves—Proved Reserve, Standardized Measure, and PV-10 Sensitivities for additional proved reserve sensitivities under certain increasing and decreasing commodity price scenarios for crude oil and natural gas.
Revenue Recognition
We derive substantially all of our revenues from the sale of crude oil and natural gas. See Part II, Item 8. Notes to Consolidated Financial Statements—Note 8. Revenues for discussion of our accounting policies governing the recognition and presentation of revenues as well as the impact on our financial statements resulting from the implementation of new revenue recognition rules on January 1, 2018.revenues.
Operated crude oil and natural gas revenues are recognized during the month in which control transfers to the customer and it is probable the Company will collect the consideration it is entitled to receive. For non-operated properties, the Company's proportionate share of production is generally marketed at the discretion of the operators. Non-operated revenues are recognized by the Company during the month in which production occurs and it is probable the Company will collect the consideration it is entitled to receive.
At the end of each month, to record revenues we estimate the amount of production delivered and sold to customers and the prices at which they were sold. Variances between estimated revenues and actual amounts received for all prior months are recorded in the month payment is received and are reflected in our financial statements as crude oil and natural gas sales. These variances have historically not been material.
For the sale of crude oil and natural gas, we evaluate whether we are the principal, and report revenues on a gross basis (revenues presented separately from associated expenses), or an agent, and report revenues on a net basis. In this assessment, we consider if we obtain control of the products before they are transferred to the customer as well as other indicators. Significant judgmentJudgment may be required in determining the point in time when control of products transfers to customers.
Successful Efforts Method of Accounting
Our business is subject to accounting rules that are unique to the crude oil and natural gas industry. Two generally accepted methods of accounting for oil and gas activities are availablethe successful efforts method and the full cost method. The most significant differences between these two methods are the treatment of exploration costs and the manner in which the carrying value of oil and gas properties are amortized and evaluated for impairment. We use the successful efforts method of accounting for our oil and gas properties. See Part II, Item 8. Notes to Consolidated Financial Statements—Note 1. Organization and Summary of Significant Accounting Policies for further discussion of the accounting policies applicable to the successful efforts method of accounting.

54



Derivative Activities
WeFrom time to time we may utilize derivative contracts to hedge against the variability in cash flows associated with the forecasted sale of future crude oil and natural gas production and for other purposes. We have elected not to designate any of our price risk management activities as cash flow hedges. As a result, we mark our derivative instruments to fair value and recognize the changes in fair value in current earnings.
In determining the amounts to be recorded for our openoutstanding derivative contracts, we are required to estimate the fair value of the derivatives. We use an independent third party to provide our derivative valuations. The third party’s valuation models for derivative contracts are industry-standard models that consider various inputs including quoted forward prices for commodities, time value, volatility factors, and current market and contractual prices for the underlying instruments, as well as other relevant economic measures. The fair value calculations for collars requires the use of an option-pricing model. The estimated future prices are compared to the prices fixed by the derivative agreements and the resulting estimated future cash inflows or outflows over the lives of the derivatives are discounted to calculate the fair value of the derivative contracts. These pricing and discounting variables are sensitive to market volatility as well as changes in future price forecasts and interest rates. See Part II, Item 7A. Quantitative and Qualitative Disclosures About Market Risk for a discussion of the sensitivity of natural gas derivative fair value calculations to changes in forward natural gas prices.
We validate our derivative valuations through management review and by comparison to our counterparties’ valuations for reasonableness. Differences between our fair value calculations and counterparty valuations have historically not been material.
Impairment of Assets
All of our long-lived assets are monitored for potential impairment when circumstances indicate the carrying value of an asset may be greater than its future net cash flows, including cash flows from risk-adjusted proved reserves. Risk-adjusted probable and possible reserves may be taken into consideration when determining estimated future net cash flows and fair value when such reserves exist and are economically recoverable.
Proved crude oil and natural gas properties are reviewed for impairment on a field-by-field basis. If the carrying amount of a field exceeds its estimated undiscounted future cash flows, the carrying amount of the field is reduced to its estimated fair value using a discounted cash flow model. For producing properties, the impairment evaluations involve a significant amount of judgment since the results are based on estimated future events, such as future sales prices for crude oil and natural gas, future costs to produce those products, estimates of future crude oil and natural gas reserves to be recovered and the timing thereof, the economic and regulatory climates and other factors. The need to test a field for impairment may result from significant declines in sales prices or downward revisions or removals of crude oil and natural gas reserves. Estimates of anticipated sales prices and recoverable reserves are highly judgmental and are subject to material revision in future periods.
Impairment provisions for proved properties totaled $18.0$207.1 million for 2018.2020. Commodity price assumptions used for the year-end December 31, 20182020 impairment calculations were based on publicly available average annual forward commodity strip prices through year-end 20232025 and were then escalated at 3% per year thereafter. Holding all other factors constant, as forward commodity prices decrease, our probability for recognizing producing property impairments may increase, or the magnitude of impairments to be recognized may increase. Conversely, as forward commodity prices increase, our probability for recognizing producing property impairments may decrease, or the magnitude of impairments to be recognized may decrease or be eliminated. As of December 31, 2018,2020, the publicly available forward commodity strip prices for the year 20232025 used in our fourth quarter impairment calculations averaged $52.34$44.82 per barrel for crude oil and $2.71$2.52 per Mcf for natural gas. If forward commodity prices materially decrease from current levels for an extended period, additional impairments of producing properties may be recognized in the future. Because of the uncertainty inherent in the numerous factors utilized in determining the fair value of producing properties, we cannot predict the timing and amount of future impairment charges, if any.
Impairment losses for unproved properties are generally recognized by amortizing the portion of the properties’ costs which management estimates will not be transferred to proved properties over the lives of the leases based on drilling plans, experience of successful drilling, and the average holding period. The impairment assessments are affected by economic factors such as the results of exploration activities, commodity price outlooks, anticipated drilling programs, remaining lease terms, and potential shifts in business strategy employed by management. The estimated timing and rate of successful drilling is highly judgmental and is subject to material revision in future periods as better information becomes available.
Income Taxes
We make certain estimatesIncome taxes are accounted for using the asset and judgments in determining ourliability method. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income tax expense for financial reporting purposes. These estimates and judgments occur in the calculation of certainyears in which those differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities that arise from differencesof a change in the timing and recognition of revenue and expense for tax and financial reporting purposes. Our federal and staterates is recognized in income tax returns are generally not prepared or filed before the consolidated financial statements are prepared; therefore, we estimate the


tax basis of our assets and liabilities at the end of each period as well as the effects of tax rate changes, tax credits and net operating loss carryforwards. Adjustments related to these estimates are recorded in our tax provision in the period in which we file our income tax returns. Further, we must assessthat includes the likelihood we will be able to recover or utilize our deferred tax assets. If recovery is not likely, we must record a valuation allowance against suchenactment date.
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In assessing the realizability of deferred tax assets, for the amount we would not expect to recover, which would result in an increase to our income tax expense. As of December 31, 2018, we believe all deferred tax assets, net of valuation allowances, reflected in our consolidated balance sheets will ultimately be utilized. Wemanagement must consider future taxable income in making such assessments. Numerous judgments and assumptions are inherent in the determination of future taxable income, including factors such as future operating conditions (particularly related to prevailing crude oil and natural gas prices). If our estimates and judgments change regarding our ability to utilize our deferred tax assets, our tax provision could increase in the period it is determined thatwhether it is more likely than not that some portion or all of the deferred tax assets will not be realized. We apply judgment to determine the weight of both positive and negative evidence in order to conclude whether a valuation allowance is necessary for our deferred tax assets. In determining whether a valuation allowance is required for our deferred tax asset will not be utilized.
Ourbalances, we consider, among other factors, current financial position, results of operations, projected future taxable income, reversal of existing deferred tax liabilities against deferred tax assets, whether the carryforward period is so brief that it would limit realization of the tax benefit, and tax planning strategies. Significant judgment is involved in this determination as we are required to make assumptions about future commodity prices, projected production, development activities, profitability of future business strategies and forecasted economics in the oil and gas industry. Additionally, changes in the effective tax rate is subject to variabilityresulting from period to period as a result of factors other than changes in federal and state tax rates and/or changes in tax laws which canlaw and our level of earnings may limit utilization of deferred tax assets and may affect tax-paying companies. Our effective tax rate is affected by, among other things, permanent taxable differences,the valuation allowances, and changes in the allocation of property, payroll, and revenues between states in which we own property as rates vary from state to state. Due to the size of our gross deferred tax balances in the future. Changes in judgment regarding future realization of deferred tax assets may result in a small changereversal of all or a portion of the valuation allowance.
We believe our net deferred tax assets, after valuation allowances, will ultimately be realized. We will continue to evaluate both the positive and negative evidence on a quarterly basis in determining the need for additional valuation allowances with respect to our estimated futuredeferred tax rate can haveassets.In 2020, we determined it was more likely than not that a material effect on current period earnings.portion of our Oklahoma net operating loss carryforward would not be utilized before expiration, and a valuation allowance of $14.5 million was established during the year for the deferred tax asset associated with such net operating loss carryforward.
Contingent Liabilities
A provision for legal, environmental and other contingencies is charged to expense when a loss is probable and the loss or range of loss can be reasonably estimated. Determining when liabilities and expenses should be recorded for these contingencies and the appropriate amounts of accruals is subject to an estimation process that requires subjective judgment of management. In certain cases, management’s judgment is based on the advice and opinions of legal counsel and other advisers, the interpretation of laws and regulations which can be interpreted differently by regulators and/or courts of law, the experience of the Company and other companies dealing with similar matters, and management’s decision on how it intends to respond to a particular matter; for example, a decision to contest it vigorously or a decision to seek a negotiated settlement. Actual losses can differ from estimates for various reasons, including differing interpretations of laws and opinions and assessments on the amount of damages. We closely monitor known and potential legal, environmental and other contingencies and make our best estimate of when or if to record liabilities and losses for matters based on available information.
Off-Balance Sheet Arrangements
Currently, we do not have any off-balance sheet arrangements with unconsolidated entities to enhance liquidity and capital resources.
New Accounting Pronouncements
See Part II, Item 8. Notes to Consolidated Financial Statements—Note 1. Organization and Summary of Significant Accounting Policies9. Allowance for discussionsCredit Losses for a discussion of the new revenue recognition and presentation rulescredit loss accounting standard adopted on January 1, 2018, the impact of new lease accounting rules adopted on January 1, 2019, and new guidance on estimating credit losses not yet adopted.2020.
Legislative and Regulatory Developments
The crude oil and natural gas industry in the United States is subject to various types of regulation at the federal, state and local levels. See Part I, Item 1. Business—Regulation of the Crude Oil and Natural Gas Industry for a discussion of significant laws and regulations that have been enacted or are currently being considered by regulatory bodies that may affect us in the areas in which we operate.
2017 Tax Reform Legislation
In December 2017,particular, in January 2021 President Biden issued executive orders that, among other things, suspend new permitting and leasing activities for oil and gas exploration and production on federal lands and establish new greenhouse gas emission standards for the Tax Cutsoil and Jobs Act was signed into law which contained several significant changesgas sector. President Biden may continue to U.S. corporate taxissue additional executive orders in pursuit of his regulatory agenda and, with control of Congress shifting in January 2021, there is the potential for the revision of existing laws including a reduction ofand regulations or the corporate income tax rate from 35% to 21%. The legislation also included a variety of other changes such as the repeal of the alternative minimum tax; the introductionadoption of new limitations onlegislation that could adversely affect the tax deductibility of net operating losses, interest expenses,oil and executive compensation expenses; the acceleration of expensing of certain qualified property; and the introduction of new laws governing taxation of foreign earnings of U.S. entities, among other things. Changes arising from the Tax Cuts and Jobs Act generally became effective on January 1, 2018.gas industry.


The tax law changes are generally expected to have an overall favorable impact on our business primarily due to expected benefits from the reduced corporate tax rate. The law changes are not expected to adversely impact our liquidity or the amount of cash payments we make for income taxes for at least the next five years.
The Company's accounting for the effects of the tax rate change on its deferred tax balances as well as other relevant aspects of the Tax Cuts and Jobs Act was completed as of December 31, 2017 and no provisional amounts were recorded at year-end 2017 that were later adjusted in 2018.
Inflation
Certain drilling and completion costs and costs of oilfield services, equipment, and materials decreased in recent years as service providers reduced their costs in response to reduced demand arising from low crude oil prices. However, inflationary pressures returned in 2017 and increased in 2018 in conjunction with improved crude oil prices. As a result of the low commodity price environment in recent years, the number of providers of services, equipment, and materials have decreased in the regions where we operate. If commodity prices show signs of diminished volatility and sustained recovery, industry drilling and completion activities are likely to continue to increase and we may face shortages of service providers, equipment, and materials. Such shortages could result in increased competition which may lead to further increases in costs.
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Non-GAAP Financial Measures
Net crude oil and natural gas sales and net sales prices
AsRevenues and transportation expenses associated with production from our operated properties are reported separately as discussed in Part II, Item 8. Notes to Consolidated Financial Statements—Note 8. Revenueswe adopted new revenue recognition and presentation rules on January 1, 2018. The new rules did not have a material impact on the timing of our revenue recognition or our financial position, results of operations, net income, or cash flows for the year ended December 31, 2018, but did impact the presentation of our crude oil and natural gas revenues. We adopted the new rules using a modified retrospective transition approach whereby changes have been applied for periods commencing after December 31, 2017 and prior period results have not been adjusted to conform to current presentation.
Under the new rules, revenues and transportation expenses associated with production from our operated properties are now reported on a gross basis compared to net presentation in prior years.. For non-operated properties, we receive a net payment from the operator for our share of sales proceeds which is net of costs incurred by the operator, if any. Such non-operated revenues are recognized at the net amount of proceeds received, consistent with our historical practice.received. As a result, beginning January 1, 2018 the grossseparate presentation of revenues and transportation expenses from our operated properties differs from the net presentation of revenues from non-operated properties. This impacts the comparability of certain operating metrics, such as per-unit sales prices, when such metrics are prepared in accordance with U.S. GAAP using gross presentation for some revenues and net presentation for others.
In order to provide metrics prepared in a manner consistent with how management assesses the Company's operating results and to achieve comparability between operated and non-operated revenues, and to achieve comparability with prior period metrics for analysis purposes, we have presented crude oil and natural gas sales net of transportation expenses in Management’s Discussion and Analysis of Financial Condition and Results of Operations, whichwhich we refer to as "net crude oil and natural gas sales," a non-GAAP measure. Average sales prices calculated using net crude oil and natural gas sales are referred to as "net sales prices," a non-GAAP measure, and are calculated by taking revenues less transportation expenses divided by sales volumes, whether for crude oil or natural gas, as applicable. Management believes presenting our revenues and sales prices net of transportation expenses is useful because it normalizes the presentation differences between operated and non-operated revenues and allows for a useful comparison of net realized prices to NYMEX benchmark prices on a Company-wide basis.
The following table presents a reconciliation of total Company crude oil and natural gas sales (GAAP) to net crude oil and natural gas sales and related net sales prices (non-GAAP) for the fourth quarter2020, 2019, and full year periods of 2018.
Total CompanyYear Ended December 31, 2020Year Ended December 31, 2019Year Ended December 31, 2018
In thousandsCrude oilNatural gasTotalCrude oilNatural gasTotalCrude oilNatural gasTotal
Crude oil and natural gas sales (GAAP)$2,199,976 $355,458 $2,555,434 $3,929,994 $584,395 $4,514,389 $3,792,594 $886,128 $4,678,722 
Less: Transportation expenses(158,989)(37,703)(196,692)(191,998)(33,651)(225,649)(162,312)(29,275)(191,587)
Net crude oil and natural gas sales (non-GAAP)$2,040,987 $317,755 $2,358,742 $3,737,996 $550,744 $4,288,740 $3,630,282 $856,853 $4,487,135 
Sales volumes (MBbl/MMcf/MBoe)58,793 306,528 109,881 72,136 311,865 124,113 61,332 284,730 108,787 
Net sales price (non-GAAP)$34.71 $1.04 $21.47 $51.82 $1.77 $34.56 $59.19 $3.01 $41.25 
57


Total Company Fourth Quarter 2018 Year Ended December 31, 2018 
In thousands Crude oil Natural gas Total Crude oil Natural gas Total 
Crude oil and natural gas sales (GAAP) $900,872
 $253,232
 $1,154,104
 $3,792,594
 $886,128
 $4,678,722
 
Less: Transportation expenses (42,373) (6,655) (49,028) (162,312) (29,275) (191,587) 
Net crude oil and natural gas sales (non-GAAP for 2018) $858,499
 $246,577
 $1,105,076
 $3,630,282
 $856,853
 $4,487,135
 
Sales volumes (MBbl/MMcf/MBoe) 17,149
 75,661
 29,759
 61,332
 284,730
 108,787
 
Net sales price (non-GAAP for 2018) $50.06
 $3.26
 $37.13
 $59.19
 $3.01
 $41.25
 



The following tables present reconciliations of crude oil and natural gas sales (GAAP) to net crude oil and natural gas sales and related net sales prices (non-GAAP) for North Dakota Bakken and SCOOP and STACK for the year ended December 31,2020, 2019, and 2018 as presented in Part I, Item 1. Business—Crude Oil and Natural Gas Operations—Production and Price History.
North Dakota BakkenYear Ended December 31, 2020Year Ended December 31, 2019Year Ended December 31, 2018
In thousandsCrude oilNatural gasTotalCrude oilNatural gasTotalCrude oilNatural gasTotal
Crude oil and natural gas sales (GAAP)$1,469,450 $24,714 $1,494,164 $2,826,136 $128,426 $2,954,562 $2,797,771 $263,388 $3,061,159 
Less: Transportation expenses(127,036)(2,580)(129,616)(157,076)(2,530)(159,606)(128,287)(2,291)(130,578)
Net crude oil and natural gas sales (non-GAAP)$1,342,414 $22,134 $1,364,548 $2,669,060 $125,896 $2,794,956 $2,669,484 $261,097 $2,930,581 
Sales volumes (MBbl/MMcf/MBoe)40,040 97,532 56,295 52,374 98,186 68,738 45,735 78,448 58,810 
Net sales price (non-GAAP)$33.53 $0.23 $24.24 $50.96 $1.28 $40.66 $58.37 $3.33 $49.83 
Year Ended December 31, 2018 North Dakota Bakken 
In thousands Crude oil Natural gas Total 
Crude oil and natural gas sales (GAAP) $2,797,771
 $263,388
 $3,061,159
 
Less: Transportation expenses (128,287) (2,291) (130,578) 
Net crude oil and natural gas sales (non-GAAP for 2018) $2,669,484
 $261,097
 $2,930,581
 
Sales volumes (MBbl/MMcf/MBoe) 45,735
 78,448
 58,810
 
Net sales price (non-GAAP for 2018) $58.37
 $3.33
 $49.83
 
Year Ended December 31, 2018 SCOOP 
In thousands Crude oil Natural gas Total 
Crude oil and natural gas sales (GAAP) $435,798
 $351,021
 $786,819
 
Less: Transportation expenses (4,039) (11,741) (15,780) 
Net crude oil and natural gas sales (non-GAAP for 2018) $431,759
 $339,280
 $771,039
 
Sales volumes (MBbl/MMcf/MBoe) 6,882
 99,397
 23,447
 
Net sales price (non-GAAP for 2018) $62.74
 $3.41
 $32.88
 
Year Ended December 31, 2018 STACK 
SCOOPSCOOPYear Ended December 31, 2020Year Ended December 31, 2019Year Ended December 31, 2018
In thousands Crude oil Natural gas Total In thousandsCrude oilNatural gasTotalCrude oilNatural gasTotalCrude oilNatural gasTotal
Crude oil and natural gas sales (GAAP) $227,615
 $256,657
 $484,272
 Crude oil and natural gas sales (GAAP)$486,076 $246,125 $732,201 $640,097 $277,230 $917,327 $435,798 $351,021 $786,819 
Less: Transportation expenses (4,574) (15,184) (19,758) Less: Transportation expenses(5,275)(21,909)(27,184)(3,539)(14,795)(18,334)(4,039)(11,741)(15,780)
Net crude oil and natural gas sales (non-GAAP for 2018) $223,041
 $241,473
 $464,514
 
Net crude oil and natural gas sales (non-GAAP)Net crude oil and natural gas sales (non-GAAP)$480,801 $224,216 $705,017 $636,558 $262,435 $898,993 $431,759 $339,280 $771,039 
Sales volumes (MBbl/MMcf/MBoe) 3,599
 101,267
 20,477
 Sales volumes (MBbl/MMcf/MBoe)12,694 136,410 35,429 11,592 111,436 30,164 6,882 99,397 23,447 
Net sales price (non-GAAP for 2018) $61.97
 $2.38
 $22.68
 
Net sales price (non-GAAP)Net sales price (non-GAAP)$37.88 $1.64 $19.90 $54.92 $2.36 $29.80 $62.74 $3.41 $32.88 
PV-10
Our PV-10 value, a non-GAAP financial measure, is derived from the standardized measure of discounted future net cash flows, which is the most directly comparable financial measure computed using U.S. GAAP. PV-10 generally differs from Standardized Measure because it does not include the effects of income taxes on future net revenues. At December 31, 2018,2020, our PV-10 totaled approximately $18.7$4.89 billion. The standardized measure of our discounted future net cash flows was approximately $15.7$4.65 billion at December 31, 2018,2020, representing a $3.0 billion$239 million difference from PV-10 due to the effect of deducting estimated future income taxes in arriving at Standardized Measure. We believe the presentation of PV-10 is relevant and useful to investors because it presents the discounted future net cash flows attributable to proved reserves held by companies without regard to the specific income tax characteristics of such entities and is a useful measure of evaluating the relative monetary significance of our crude oil and natural gas properties. Investors may utilize PV-10 as a basis for comparing the relative size and value of our proved reserves to other companies. PV-10 should not be considered as a substitute for, or more meaningful than, the Standardized Measure as determined in accordance with U.S. GAAP. Neither PV-10 nor Standardized Measure represents an estimate of the fair market value of our crude oil and natural gas properties.






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Item 7A.Quantitative and Qualitative Disclosures About Market Risk
Item 7A.    Quantitative and Qualitative Disclosures About Market Risk
General. We are exposed to a variety of market risks including commodity price risk, credit risk, and interest rate risk. We seek to address these risks through a program of risk management which may include the use of derivative instruments.
Commodity Price Risk. Our primary market risk exposure is in the prices we receive from sales of our crude oil and natural gas production.gas. Realized pricing is primarily driven by the prevailing worldwide price for crude oil and spot market prices applicable to our natural gas production. PricingPrices for crude oil and natural gas hashave been volatile and unpredictable for several years, and we expect this volatility to continue in the future. The prices we receive for production depend on many factors outside of our control, including volatility in the differences between product prices at sales points and the applicable index prices. Based on our average daily production for the quarter ended December 31, 2018,2020, and excluding any effect of our derivative instruments in place, our annual revenue would increase or decrease by approximately $682$645 million for each $10.00 per barrel change in crude oil prices at December 31, 2020 and $300$356 million for each $1.00 per Mcf change in natural gas prices.prices at December 31, 2020.
To reduce price risk caused by market fluctuations in crude oil and natural gas prices, from time to time we may economically hedge a portion of our anticipated crude oil and natural gas production as part of our risk management program. In addition, we may utilize basis contracts to hedge the differential between derivative contract index prices and those of our physical pricing points. Reducing our exposure to price volatility helps secure funds to be used for our capital program. Our decision on the quantity and price at which we choose to hedge our production is based in part on our view of current and future market conditions. We may choose not to hedge future production if the price environment for certain time periods is deemed to be unfavorable. Additionally, we may choose to liquidate existing derivative positions prior to the expiration of their contractual maturities in order to monetize gain positions for the purpose of funding our capital program. While hedging, if utilized, limitsmay limit the downside risk of adverse price movements, it also limitsmay limit future revenues from upward price movements. We have hedged the majority of our forecasted 2019 natural gas production. Our future crude oil production is currently unhedged and directly exposed to continued volatility in market prices, whether favorable or unfavorable.
Changes in natural gas prices during the year ended December 31, 2018 had an overall unfavorable impact on the fair value of our derivative instruments. For the year ended December 31, 2018, we recognized cash losses on natural gas derivatives of$36.9 million which were partially offset by non-cash mark-to-market gains on natural gas derivatives of $13.0 million.
The fair value of our natural gas derivative instruments at December 31, 20182020 was a net asset of $15.6 million. $13.7 million. An assumed increase in the forward prices used in the year-endDecember 31, 2020 valuation of our natural gas derivatives of $1.00 per MMBtu would change our natural gas derivative valuation to a net liability of approximately $84$27 million at December 31, 2018.2020. Conversely, an assumed decrease in forward prices of $1.00 per MMBtu would increase our natural gas derivative asset to approximately $116$63 million at December 31, 2018. 2020.
Changes in the fair value of our natural gas derivatives from the above price sensitivities would produce a corresponding change in our total revenues.
Credit Risk. We monitor our risk of loss due to non-performance by counterparties of their contractual obligations. Our principal exposure to credit risk is through the sale of our crude oil and natural gas production, which we market to energy marketing companies, crude oil refining companies, and natural gas gathering and processing companies ($644561 million in receivables at December 31, 2018);2020) and our joint interest and other receivables ($368144 million at December 31, 2018); and counterparty credit risk associated with our derivative instrument receivables ($16 million at December 31, 2018)2020).
We monitor our exposure to counterparties on crude oil and natural gas sales primarily by reviewing credit ratings, financial statements and payment history. We extend credit terms based on our evaluation of each counterparty’s credit worthiness. We have not generally required our counterparties to provide collateral to secure crude oil and natural gas sales receivables owed to us. Historically, our credit losses on crude oil and natural gas sales receivables have been immaterial.immaterial; however, we could experience increased exposure to credit losses in the future, which may be material, if the adverse economic effects of the COVID-19 pandemic persist for an extended period.
Joint interest receivables arise from billing the individuals and entities who own a partial interest in the wells we operate. These individuals and entities participate in our wells primarily based on their ownership in leases included in units on which we wish to drill. We can do very little to choose who participates in our wells. In order to minimize our exposure to this credit risk we generally request prepayment of drilling costs where it is allowed by contract or state law. For such prepayments, a liability is recorded and subsequently reduced as the associated work is performed. This liability was $54$25 million at December 31, 2018,2020, which will be used to offset future capital costs when billed. In this manner, we reduce credit risk. We may have the right to place a lien on a co-owner’s interest in the well to redirect production proceeds in order to secure payment or, if necessary, foreclose on the interest. Historically, our credit losses on joint interest receivables have been immaterial.
Our use of derivative instruments involves the risk that our counterparties will be unable to meet their commitments under the arrangements. We manage this risk by using multiple counterparties whoimmaterial; however, we consider to be financially strong in order to minimize ourcould experience increased exposure to credit risk with any individual counterparty.losses in the future, which may be material, if the adverse economic effects of the COVID-19 pandemic persist for an extended period.


Interest Rate Risk. Our exposure to changes in interest rates relates primarily to any variable-rate borrowings we may have outstanding from time to time under our revolving credit facility. Such borrowings bear interest at market-based interest rates plus a margin based on the terms of the borrowing and the credit ratings assigned to our senior, unsecured, long-term indebtedness. We had no outstanding borrowingsIn March 2020, our corporate credit rating was downgraded by S&P in response to weakened oil and gas industry conditions and
59


resulting revisions made to rating agency commodity price assumptions. The downgrade caused the interest rate on our credit facility at January 31, 2019.borrowings to increase by 0.25% and also prompted a 0.05% increase in the rate of commitment fees paid on unused borrowing availability. All of our other long-term indebtedness is fixed rate and does not expose us to the risk of cash flow loss due to changes in market interest rates.
We had $360 million of variable rate borrowings outstanding on our credit facility at January 31, 2021. The impact of a 0.25% increase in interest rates on this amount of debt would result in increased interest expense and reduced income before income taxes of approximately $0.9 million per year.
We manage our interest rate exposure by monitoring both the effects of market changes in interest rates and the proportion of our debt portfolio that is variable-rate versus fixed-rate debt. We may utilize interest rate derivatives to alter interest rate exposure in an attempt to reduce interest rate expense related to existing debt issues. Interest rate derivatives may be used solely to modify interest rate exposure and not to modify the overall leverage of the debt portfolio. We currently have no interest rate derivatives.
The following table presents our debt maturities and the weighted average interest rates by expected maturity date as of December 31, 2018:2020:
In thousands20212022202320242025ThereafterTotal
Fixed rate debt:
Senior Notes:
Principal amount (1)(2)$— $630,782 $649,625 $911,000 $— $3,200,000 $5,391,407 
Weighted-average interest rate— 5.0%4.5%3.8 %— %5.1 %4.8 %
Notes payable:
Principal amount (1)$2,245 $2,326 $2,410 $2,495 $2,587 $12,633 $24,696 
Interest rate3.5 %3.5 %3.5 %3.5 %3.5 %3.5 %3.5 %
Variable rate debt:
Credit facility:
Principal amount (2)$— $— $160,000 $— $— $— $160,000 
Weighted-average interest rate— — 1.9 %— — — 1.9 %
(1)Amounts represent scheduled maturities and do not reflect any discount or premium at which the notes were issued or any debt issuance costs.
(2)On January 5, 2021, we redeemed $400 million principal amount of our outstanding 2022 Notes using proceeds from borrowings on our credit facility. Such activity is not reflected in the table above.

60
In thousands 2019 2020 2021 2022 2023 Thereafter Total
Fixed rate debt: 
 
 
 
 
 
 
Senior Notes: 
 
 
 
 
 
 
Principal amount (1) $
 $
 $
 $1,600,000
 $1,500,000
 $2,700,000
 $5,800,000
Weighted-average interest rate 
 
 
 5.0% 4.5% 4.3% 4.5%
Note payable: 
 
 
 
 
 
 
Principal amount (1) $2,360
 $2,435
 $2,515
 $425
 $
 $
 $7,735
Interest rate 3.1% 3.1% 3.1% 3.1% 
 
 3.1%
Variable rate debt: 
 
 
 
 
 
 
Revolving credit facility: 
 
 
 
 
 
 
Principal amount $
 $
 $
 $
 $
 $
 $
Weighted-average interest rate 
 
 
 
 
 
 
(1)Amounts represent scheduled maturities and do not reflect any discount or premium at which the notes were issued or any debt issuance costs.





Item 8.
Item 8.    Financial Statements and Supplementary Data




Index to Consolidated Financial Statements

61



REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM


Board of Directors and Shareholders
Continental Resources, Inc.


Opinion on the financial statements
We have audited the accompanying consolidated balance sheets of Continental Resources, Inc. (an Oklahoma corporation) and subsidiaries (the “Company”) as of December 31, 20182020 and 2017,2019, the related consolidated statements of comprehensive income (loss), equity, and cash flows for each of the three years in the period ended December 31, 2018,2020, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 20182020 and 2017,2019, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018,2020, in conformity with accounting principles generally accepted in the United States of America.
We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (“PCAOB”), the Company’s internal control over financial reporting as of December 31, 2018,2020, based on criteria established in the 2013 Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”), and our report dated February 18, 201916, 2021 expressed an unqualified opinion.
Change in accounting principles
As discussed in Note 1 to the consolidated financial statements, the Company has changed its method of accounting for revenue from contracts with customers due to the adoption of the new revenue standard. The Company adopted the new revenue standard using the modified retrospective approach. Our opinion is not modified with respect to this matter.
Basis for opinion
These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence supportingregarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical audit matter
The critical audit matter communicated below is a matter arising from the current period audit of the financial statements that was communicated or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.
Estimation of proved crude oil and natural gas reserves as it relates to the recognition of depletion expense and of proved and unproved crude oil and natural gas reserves for the assessment / measurement of impairment of proved crude oil and natural gas properties (herein referred to as “the crude oil and natural gas reserves”)

    As described in Note 1 to the consolidated financial statements, the Company accounts for its crude oil and natural gas properties using the successful efforts method of accounting, which requires management to make estimates of proved crude oil and natural gas reserve volumes and future cash flows to record depletion expense and proved and unproved crude oil and natural gas reserves to assess its crude oil and natural gas properties for impairment. To estimate the crude oil and natural gas reserves and future cash flows, management makes significant estimates and assumptions including forecasting the production decline rate of producing crude oil and natural gas properties and forecasting the timing and volume of production associated with the Company’s development plan for proved undeveloped properties and unproved properties. In addition, the estimation of the crude oil and natural gas reserves is also impacted by management’s judgments and estimates regarding the financial performance of wells associated with the crude oil and natural gas reserves to determine if wells are expected with reasonable certainty to be economical under the appropriate pricing assumptions required in the estimation of depletion expense and impairment assessments / measurements. We identified the estimation
62


of proved crude oil and natural gas reserves as it relates to the recognition of depletion expense and proved and unproved crude oil and natural gas reserves for the assessment / measurement of impairment of crude oil and natural gas properties as a critical audit matter.
    The principal considerations for our determination that the estimation of proved crude oil and natural gas reserves as it relates to the recognition of depletion expense and proved and unproved crude oil and natural gas reserves for the assessment / measurement of impairment of crude oil and natural gas properties is a critical audit matter is that relatively minor changes in certain inputs and assumptions, which require a high degree of subjectivity, necessary to estimate the volume and future cash flows of the Company’s crude oil and natural gas reserves could have a significant impact on the measurement of depletion expense or assessment / measurement of impairment expense.
    Our audit procedures related to the estimation of proved crude oil and natural gas reserves as it relates to the recognition of depletion expense and proved and unproved crude oil and natural gas reserves for the assessment / measurement of impairment included the following, among others.
Tested the design and operating effectiveness of controls relating to management’s estimation of proved crude oil and natural gas reserves for the purpose of estimating depletion expense and proved and unproved crude oil and natural gas reserves for assessing / measuring the Company’s proved crude oil and gas properties for impairment.

Assessed the independence, objectivity, and professional qualifications of the Company’s reservoir engineer specialists, made inquiries of these specialists (internal and external) regarding the process followed and judgments used to make significant estimates, including but not limited to crude oil and natural gas reserve volumes, decline rates, and economically recoverable crude oil and natural gas reserves and reviewed the reserve estimates prepared by the Company’s specialists.

To the extent key inputs and assumptions used to determine crude oil and natural gas reserve volumes and other cash flow inputs and assumptions are derived from the Company’s accounting records, including, but not limited to: historical pricing differentials, operating costs, estimated capital costs, discount rates, and ownership interests, we tested management’s process for determining the assumptions, including examining underlying support on a sample basis. Specifically, our audit procedures involved testing management’s assumptions by:

Compared the estimated pricing differentials used in the reserve report to realized prices related to revenue transactions recorded in the current year and examined contractual support for the pricing differentials
Evaluated the models used to estimate the operating costs at year-end and compared to historical operating costs
Compared the estimates of future capital expenditures in the reserve reports to management’s forecasts and amounts expended for recently drilled and completed wells
Evaluated the working and net revenue interests used in the reserve report by inspecting land and division order records
Evaluated the Company’s evidence supporting the amount of proved undeveloped properties reflected in the reserve report by examining historical conversion rates and support for the Company’s ability to fund and intent to develop the proved undeveloped properties
Applied analytical procedures to the reserve report by comparing to historical actual results and to the prior year reserve report
Evaluated the reasonableness of the Company’s classification of reserves as proved or unproved; and
Evaluated the reasonableness of risk-adjustment factors applied to unproved crude oil and natural gas reserves that were taken into consideration to determine estimated future net cash flows used to evaluate proved property impairment.

/s/ GRANT THORNTON LLP


We have served as the Company’s auditor since 2004.


Oklahoma City, Oklahoma
February 18, 201916, 2021






63


Continental Resources, Inc. and Subsidiaries
Consolidated Balance Sheets

  December 31,
In thousands, except par values and share data 2018 2017
Assets    
Current assets:    
Cash and cash equivalents $282,749
 $43,902
Receivables:    
Crude oil and natural gas sales 644,107
 671,665
Affiliated parties 73
 63
Joint interest and other, net 368,235
 426,585
Derivative assets 15,612
 2,603
Inventories 88,544
 97,406
Prepaid expenses and other 13,041
 9,501
Total current assets 1,412,361
 1,251,725
Net property and equipment, based on successful efforts method of accounting 13,869,800
 12,933,789
Other noncurrent assets 15,786
 14,137
Total assets $15,297,947
 $14,199,651
     
Liabilities and equity    
Current liabilities:    
Accounts payable trade $717,560
 $692,908
Revenues and royalties payable 400,567
 374,831
Payables to affiliated parties 203
 143
Accrued liabilities and other 266,819
 260,074
Current portion of long-term debt 2,360
 2,286
Total current liabilities 1,387,509
 1,330,242
Long-term debt, net of current portion 5,765,989
 6,351,405
Other noncurrent liabilities:    
Deferred income tax liabilities, net 1,574,436
 1,259,558
Asset retirement obligations, net of current portion 136,986
 111,794
Other noncurrent liabilities 11,166
 15,449
Total other noncurrent liabilities 1,722,588
 1,386,801
Commitments and contingencies (Note 11) 
 
Equity:    
Preferred stock, $0.01 par value; 25,000,000 shares authorized; no shares issued and outstanding 
 
Common stock, $0.01 par value; 1,000,000,000 shares authorized;    
376,021,575 shares issued and outstanding at December 31, 2018;    
375,219,769 shares issued and outstanding at December 31, 2017 3,760
 3,752
Additional paid-in capital 1,434,823
 1,409,326
Accumulated other comprehensive income 415
 307
Retained earnings 4,706,135
 3,717,818
Total shareholders’ equity attributable to Continental Resources 6,145,133
 5,131,203
Noncontrolling interests 276,728
 
Total equity 6,421,861
 5,131,203
Total liabilities and equity $15,297,947
 $14,199,651

 December 31,
In thousands, except par values and share data20202019
Assets
Current assets:
Cash and cash equivalents$47,470 $39,400 
Receivables:
Crude oil and natural gas sales561,127 726,876 
Joint interest and other143,829 317,018 
Allowance for credit losses(2,462)(2,407)
Receivables, net702,494 1,041,487 
Derivative assets15,303 
Inventories72,157 109,536 
Prepaid expenses and other15,121 16,592 
Total current assets852,545 1,207,015 
Net property and equipment, based on successful efforts method of accounting13,737,292 14,497,726 
Operating lease right-of-use assets8,557 9,128 
Other noncurrent assets34,704 14,038 
Total assets$14,633,098 $15,727,907 
Liabilities and equity
Current liabilities:
Accounts payable trade$361,704 $629,264 
Revenues and royalties payable327,029 470,264 
Accrued liabilities and other167,013 230,368 
Derivative liabilities227 
Current portion of operating lease liabilities2,588 3,695 
Current portion of long-term debt2,245 2,435 
Total current liabilities860,806 1,336,026 
Long-term debt, net of current portion5,530,173 5,324,079 
Other noncurrent liabilities:
Deferred income tax liabilities, net1,620,154 1,787,125 
Asset retirement obligations, net of current portion177,194 151,774 
Derivative liabilities, noncurrent1,584 
Operating lease liabilities, net of current portion5,839 5,433 
Other noncurrent liabilities14,623 15,119 
Total other noncurrent liabilities1,819,394 1,959,451 
Commitments and contingencies (Note 12)00
Equity:
Preferred stock, $0.01 par value; 25,000,000 shares authorized; no shares issued and outstanding
Common stock, $0.01 par value; 1,000,000,000 shares authorized;
365,220,435 shares issued and outstanding at December 31, 2020;
371,074,036 shares issued and outstanding at December 31, 2019;3,652 3,711 
Additional paid-in capital1,205,148 1,274,732 
Retained earnings4,847,646 5,463,224 
Total shareholders’ equity attributable to Continental Resources6,056,446 6,741,667 
Noncontrolling interests366,279 366,684 
Total equity6,422,725 7,108,351 
Total liabilities and equity$14,633,098 $15,727,907 

The accompanying notes are an integral part of these consolidated financial statements.
64


Continental Resources, Inc. and Subsidiaries
Consolidated Statements of Comprehensive Income (Loss)
 
 Year Ended December 31,
In thousands, except per share data202020192018
Revenues:
Crude oil and natural gas sales$2,555,434 $4,514,389 $4,678,722 
Gain (loss) on derivative instruments, net(14,658)49,083 (23,930)
Crude oil and natural gas service operations45,694 68,475 54,794 
Total revenues2,586,470 4,631,947 4,709,586 
Operating costs and expenses:
Production expenses359,267 444,649 390,423 
Production taxes192,718 357,988 353,140 
Transportation expenses196,692 225,649 191,587 
Exploration expenses17,732 14,667 7,642 
Crude oil and natural gas service operations18,294 33,230 21,639 
Depreciation, depletion, amortization and accretion1,880,959 2,017,383 1,859,327 
Property impairments277,941 86,202 125,210 
General and administrative expenses196,572 195,302 183,569 
Net (gain) loss on sale of assets and other187 (535)(16,671)
Total operating costs and expenses3,140,362 3,374,535 3,115,866 
Income (loss) from operations(553,892)1,257,412 1,593,720 
Other income (expense):
Interest expense(258,240)(269,379)(293,032)
Gain (loss) on extinguishment of debt35,719 (4,584)(7,133)
Other1,662 3,713 3,247 
(220,859)(270,250)(296,918)
Income (loss) before income taxes(774,751)987,162 1,296,802 
(Provision) benefit for income taxes169,190 (212,689)(307,102)
Net income (loss)(605,561)774,473 989,700 
Net income (loss) attributable to noncontrolling interests(8,692)(1,168)1,383 
Net income (loss) attributable to Continental Resources$(596,869)$775,641 $988,317 
Net income (loss) per share attributable to Continental Resources:
Basic$(1.65)$2.09 $2.66 
Diluted$(1.65)$2.08 $2.64 
Comprehensive income (loss):
Net income (loss)$(605,561)$774,473 $989,700 
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments140 108 
Release of cumulative translation adjustments(555)
Total other comprehensive income (loss), net of tax(415)108 
Comprehensive income (loss)(605,561)774,058 989,808 
Comprehensive income (loss) attributable to noncontrolling interests(8,692)(1,168)1,383 
Comprehensive income (loss) attributable to Continental Resources$(596,869)$775,226 $988,425 
The accompanying notes are an integral part of these consolidated financial statements.
65
  Year Ended December 31,
In thousands, except per share data 2018 2017 2016
Revenues:      
Crude oil and natural gas sales $4,678,722
 $2,982,966
 $2,026,958
Gain (loss) on crude oil and natural gas derivatives, net (23,930) 91,647
 (71,859)
Crude oil and natural gas service operations 54,794
 46,215
 25,174
Total revenues 4,709,586
 3,120,828
 1,980,273
       
Operating costs and expenses:      
Production expenses 390,423
 324,214
 289,289
Production taxes 353,140
 208,278
 142,388
Transportation expenses 191,587
 
 
Exploration expenses 7,642
 12,393
 16,972
Crude oil and natural gas service operations 21,639
 16,880
 11,386
Depreciation, depletion, amortization and accretion 1,859,327
 1,674,901
 1,708,744
Property impairments 125,210
 237,370
 237,292
General and administrative expenses 183,569
 191,706
 169,580
Litigation settlement 
 59,600
 
Net gain on sale of assets and other (16,671) (53,915) (307,844)
Total operating costs and expenses 3,115,866
 2,671,427
 2,267,807
Income (loss) from operations 1,593,720
 449,401
 (287,534)
Other income (expense):      
Interest expense (293,032) (294,495) (320,562)
Loss on extinguishment of debt (7,133) (554) (26,055)
Other 3,247
 1,715
 1,697
  (296,918) (293,334) (344,920)
Income (loss) before income taxes 1,296,802
 156,067
 (632,454)
(Provision) benefit for income taxes (307,102) 633,380
 232,775
Net income (loss) 989,700
 789,447
 (399,679)
Net income attributable to noncontrolling interests 1,383
 
 
Net income (loss) attributable to Continental Resources $988,317
 $789,447
 $(399,679)
       
Net income (loss) per share attributable to Continental Resources:      
Basic $2.66
 $2.13
 $(1.08)
Diluted $2.64
 $2.11
 $(1.08)
       
Comprehensive income (loss):      
Net income (loss) $989,700
 $789,447
 $(399,679)
Other comprehensive income, net of tax:      
Foreign currency translation adjustments 108
 567
 3,094
Total other comprehensive income, net of tax 108
 567
 3,094
Comprehensive income (loss) 989,808
 790,014
 (396,585)
Comprehensive income (loss) attributable to noncontrolling interests 1,383
 
 
Comprehensive income (loss) attributable to Continental Resources $988,425
 $790,014
 $(396,585)



Continental Resources, Inc. and Subsidiaries
Consolidated Statements of Equity

Shareholders’ equity attributable to Continental Resources
In thousands, except share dataShares
outstanding
Common
stock
Additional
paid-in
capital
Accumulated
other
comprehensive
income
Treasury
stock
Retained
earnings
Total shareholders’ equity of Continental ResourcesNoncontrolling
interests
Total
equity
Balance at December 31, 2017375,219,769 $3,752 $1,409,326 $307 $— $3,717,818 $5,131,203 $$5,131,203 
Net Income— — — — — 988,317 988,317 1,383 989,700 
Other comprehensive income, net of tax— — — 108 — — 108 — 108 
Equity transaction costs (see Note 16)— — (4,838)— — — (4,838)— (4,838)
Stock-based compensation— — 47,223 — — — 47,223 — 47,223 
Restricted stock:
Granted1,390,914 14 — — — 14 — 14 
Repurchased and canceled(310,822)(3)(16,888)— — — (16,891)— (16,891)
Forfeited(278,286)(3)— — — — (3)— (3)
Contributions from noncontrolling interests— — — — — — — 277,238 277,238 
Distributions to noncontrolling interests— — — — — — — (1,893)(1,893)
Balance at December 31, 2018376,021,575 $3,760 $1,434,823 $415 $— $4,706,135 $6,145,133 $276,728 $6,421,861 
Net income (loss)— — — — — 775,641 775,641 (1,168)774,473 
Cash dividends declared ($0.05 per share)— — — — — (18,747)(18,747)— (18,747)
Change in dividends payable— — — — — 195 195 — 195 
Common stock repurchased— — — — (190,239)— (190,239)— (190,239)
Common stock retired(5,646,553)(56)(190,183)— 190,239 — — — — 
Other comprehensive loss, net of tax— — — (415)— — (415)— (415)
Stock-based compensation— — 52,030 — — — 52,030 — 52,030 
Restricted stock:
Granted1,526,825 15 — — — 15 — 15 
Repurchased and canceled(477,789)(5)(21,938)— — (21,943)— (21,943)
Forfeited(350,022)(3)— — — — (3)— (3)
Contributions from noncontrolling interests— — — — — — — 105,528 105,528 
Distributions to noncontrolling interests— — — — — — — (14,404)(14,404)
Balance at December 31, 2019371,074,036 $3,711 $1,274,732 $$— $5,463,224 $6,741,667 $366,684 $7,108,351 
Net income (loss)— — — — — (596,869)(596,869)(8,692)(605,561)
Cumulative effect adjustment from adoption of ASU 2016-13 (see Note 9)— — — — — (137)(137)— (137)
Cash dividends declared ($0.05 per share)— — — — — (18,580)(18,580)— (18,580)
Change in dividends payable— — — — — — 
Common stock repurchased— — — — (126,906)— (126,906)— (126,906)
Common stock retired(8,122,104)(81)(126,825)— 126,906 — — — — 
Stock-based compensation— — 64,585 — — — 64,585 — 64,585 
Restricted stock:
Granted2,738,625 27 — — — 27 — 27 
The accompanying notes are an integral part of these consolidated financial statements.
66

Continental Resources, Inc. and Subsidiaries
Consolidated Statements of Equity

  Shareholders’ equity attributable to Continental Resources    
In thousands, except share data 
Shares
outstanding
 
Common
stock
 
Additional
paid-in
capital
 
Accumulated
other
comprehensive
income (loss)
 
Retained
earnings
 Total shareholders’ equity of Continental Resources 
Noncontrolling
interests
 
Total
equity
Balance at December 31, 2015 372,959,080
 $3,730
 $1,345,624
 $(3,354) $3,322,900
 $4,668,900
 $
 $4,668,900
Net loss 
 
 
 
 (399,679) (399,679) 
 (399,679)
Other comprehensive loss, net of tax 
 
 
 3,094
 
 3,094
 
 3,094
Stock-based compensation 
 
 48,084
 
 
 48,084
 
 48,084
Tax benefit from stock-based compensation 
 
 (9,828) 
 
 (9,828) 
 (9,828)
Restricted stock:                
Granted 2,064,508
 20
 
 
 
 20
 
 20
Repurchased and canceled (337,981) (3) (8,590) 
 
 (8,593) 
 (8,593)
Forfeited (193,250) (2) 
 
 
 (2) 
 (2)
Balance at December 31, 2016 374,492,357
 $3,745
 $1,375,290
 $(260) $2,923,221
 $4,301,996
 $
 $4,301,996
Cumulative effect adjustment from adoption of ASU 2016-09 
 
 
 
 5,150
 5,150
 
 5,150
Net income 
 
 
 
 789,447
 789,447
 
 789,447
Other comprehensive income, net of tax 
 
 
 567
 
 567
 
 567
Stock-based compensation 
 
 45,854
 
 
 45,854
 
 45,854
Restricted stock:                
Granted 1,585,870
 16
 
 
 
 16
 
 16
Repurchased and canceled (259,729) (3) (11,818) 
 
 (11,821) 
 (11,821)
Forfeited (598,729) (6) 
 
 
 (6) 
 (6)
Balance at December 31, 2017 375,219,769
 $3,752
 $1,409,326
 $307
 $3,717,818
 $5,131,203
 $
 $5,131,203
Net income 
 
 
 
 988,317
 988,317
 1,383
 989,700
Other comprehensive income, net of tax 
 
 
 108
 
 108
 
 108
Equity transaction costs (see Note 15) 
 
 (4,838) 
 
 (4,838) 
 (4,838)
Stock-based compensation 
 
 47,223
 
 
 47,223
 
 47,223
Restricted stock:                
Granted 1,390,914
 14
 
 
 
 14
 
 14
Repurchased and canceled (310,822) (3) (16,888) 
 
 (16,891) 
 (16,891)
Forfeited (278,286) (3) 
 
 
 (3) 
 (3)
Contributions from noncontrolling interests 
 
 
 
 
 
 277,238
 277,238
Distributions to noncontrolling interests 
 
 
 
 
 
 (1,893) (1,893)
Balance at December 31, 2018 376,021,575
 $3,760
 $1,434,823
 $415
 $4,706,135
 $6,145,133
 $276,728
 $6,421,861

Repurchased and canceled(306,845)(3)(7,344)— — (7,347)— (7,347)
Forfeited(163,277)(2)— — — — (2)— (2)
Contributions from noncontrolling interests— — — — — — — 21,557 21,557 
Distributions to noncontrolling interests— — — — — — — (13,270)(13,270)
Balance at December 31, 2020365,220,435 $3,652 $1,205,148 $$— $4,847,646 $6,056,446 $366,279 $6,422,725 

The accompanying notes are an integral part of these consolidated financial statements.
67


Continental Resources, Inc. and Subsidiaries
Consolidated Statements of Cash Flows
 Year Ended December 31,
In thousands202020192018
Cash flows from operating activities:
Net income (loss)$(605,561)$774,473 $989,700 
Adjustments to reconcile net income (loss) to cash provided by operating activities:
Depreciation, depletion, amortization and accretion1,882,458 2,019,704 1,859,118 
Property impairments277,941 86,202 125,210 
Non-cash (gain) loss on derivatives, net(13,492)15,612 (13,009)
Stock-based compensation64,613 52,044 47,236 
Provision (benefit) for deferred income taxes(166,971)212,689 314,878 
Net (gain) loss on sale of assets and other187 (535)(16,671)
(Gain) loss on extinguishment of debt(35,719)4,584 7,133 
Other, net16,970 10,408 16,705 
Changes in assets and liabilities:
Accounts receivable332,128 (33,619)94,765 
Inventories12,859 (21,204)7,735 
Other current assets1,471 (4,459)(3,539)
Accounts payable trade(133,977)(36,359)9,274 
Revenues and royalties payable(143,260)69,195 24,010 
Accrued liabilities and other(66,071)(36,467)(4,162)
Other noncurrent assets and liabilities(1,272)3,420 (2,375)
Net cash provided by operating activities1,422,304 3,115,688 3,456,008 
Cash flows from investing activities:
Exploration and development(1,408,149)(2,783,149)(2,840,880)
Purchase of producing crude oil and natural gas properties(81,994)(51,558)(31,579)
Purchase of other property and equipment(23,994)(25,983)(42,171)
Proceeds from sale of assets2,779 88,734 54,458 
Net cash used in investing activities(1,511,358)(2,771,956)(2,860,172)
Cash flows from financing activities:
Credit facility borrowings2,052,000 1,216,000 2,024,000 
Repayment of credit facility(1,947,000)(1,161,000)(2,212,000)
Proceeds from issuance of Senior Notes1,485,000 
Redemption and repurchase of Senior Notes(1,343,250)(500,000)(400,000)
Premium and costs on redemption of Senior Notes(25,173)(4,167)(6,700)
Proceeds from other debt26,000 
Repayment of other debt(6,679)(2,352)(2,286)
Debt issuance costs(4,368)(5,535)
Equity transaction costs(4,838)
Contributions from noncontrolling interests27,116 109,137 267,920 
Distributions to noncontrolling interests(13,809)(14,164)(604)
Repurchase of common stock(126,906)(190,239)
Repurchase of restricted stock for tax withholdings(7,347)(21,943)(16,891)
Dividends paid on common stock(18,460)(18,380)
Net cash provided by (used in) financing activities97,124 (587,108)(356,934)
Effect of exchange rate changes on cash27 (55)
Net change in cash and cash equivalents8,070 (243,349)238,847 
Cash and cash equivalents at beginning of period39,400 282,749 43,902 
Cash and cash equivalents at end of period$47,470 $39,400 $282,749 
The accompanying notes are an integral part of these consolidated financial statements.
68
  Year Ended December 31,
In thousands 2018 2017 2016
Cash flows from operating activities:      
Net income (loss) $989,700
 $789,447
 $(399,679)
Adjustments to reconcile net income (loss) to cash provided by operating activities:      
Depreciation, depletion, amortization and accretion 1,859,118
 1,670,838
 1,709,567
Property impairments 125,210
 237,370
 237,292
Non-cash (gain) loss on derivatives, net (13,009) (58,031) 156,621
Stock-based compensation 47,236
 45,868
 48,098
Tax benefit from US tax reform legislation 
 (713,655) 
Provision (benefit) for deferred income taxes from operations 314,878
 88,056
 (209,836)
Tax deficiency from stock-based compensation 
 
 9,828
Dry hole costs 147
 176
 4,866
Litigation settlement 
 59,600
 
Gain on sale of assets, net (16,671) (55,124) (304,489)
Loss on extinguishment of debt 7,133
 554
 26,055
Other, net 16,558
 12,592
 9,812
Changes in assets and liabilities:      
Accounts receivable 94,765
 (329,811) (158,383)
Inventories 7,735
 14,517
 (17,836)
Other current assets (3,539) 1,038
 968
Accounts payable trade 9,274
 137,339
 (14,404)
Revenues and royalties payable 24,010
 158,982
 30,455
Accrued liabilities and other (4,162) 21,368
 (883)
Other noncurrent assets and liabilities (2,375) (2,018) (2,133)
Net cash provided by operating activities 3,456,008
 2,079,106
 1,125,919
       
Cash flows from investing activities:      
Exploration and development (2,840,880) (1,931,942) (1,154,131)
Purchase of producing crude oil and natural gas properties (31,579) (8,446) (5,008)
Purchase of other property and equipment (42,171) (12,810) (5,375)
Proceeds from sale of assets 54,458
 144,353
 631,549
Net cash used in investing activities (2,860,172) (1,808,845) (532,965)
       
Cash flows from financing activities:      
Credit facility borrowings 2,024,000
 1,302,000
 1,691,000
Repayment of credit facility (2,212,000) (2,019,000) (1,639,000)
Proceeds from issuance of Senior Notes 
 990,000
 
Redemption of Senior Notes (400,000) 
 (600,000)
Premium and costs on redemption of Senior Notes (6,700) 
 (19,168)
Repayment of other debt (2,286) (502,214) (2,144)
Debt issuance costs (5,535) (1,999) (40)
Equity transaction costs (4,838) 
 
Contributions from noncontrolling interests 267,920
 
 
Distributions to noncontrolling interests (604) 
 
Repurchase of restricted stock for tax withholdings (16,891) (11,821) (8,593)
Tax deficiency from stock-based compensation 
 
 (9,828)
Net cash used in financing activities (356,934) (243,034) (587,773)
Effect of exchange rate changes on cash (55) 32
 (1)
Net change in cash and cash equivalents 238,847
 27,259
 5,180
Cash and cash equivalents at beginning of period 43,902
 16,643
 11,463
Cash and cash equivalents at end of period $282,749
 $43,902
 $16,643



Continental Resources, Inc. and Subsidiaries
Notes to Consolidated Financial Statements

Note 1. Organization and Summary of Significant Accounting Policies
Description of the Company
Continental Resources, Inc. (the “Company”) was originally formed in 1967 and is incorporated under the laws of the State of Oklahoma. The Company’s principal business is crude oil and natural gas exploration, development and production with properties primarily located in the North, South, and East regions of the United States. Additionally, the Company pursues the acquisition and management of perpetually owned minerals located in certain of its key operating areas. The North region consists of properties north of Kansas and west of the Mississippi River and includes North Dakota Bakken, Montana Bakken, and the Red River units. The South region includes all properties south of Nebraska and west of the Mississippi River including various plays in the SCOOP and STACK areas of Oklahoma. The East region is primarily comprised of undeveloped leasehold acreage east of the Mississippi River with no significant drilling or production operations.
Basis of presentation of consolidated financial statements
The consolidated financial statements include the accounts of the Company, its wholly-owned subsidiaries, and entities in which the Company has a controlling financial interest. Intercompany accounts and transactions have been eliminated upon consolidation. Noncontrolling interests reflected herein represent third party ownership in the net assets of consolidated subsidiaries. The portions of consolidated net income (loss) and equity attributable to the noncontrolling interests are presented separately in the Company’s financial statements.
Use of estimates
The preparation of financial statements in conformity with accounting principles generally accepted in the United States (“U.S. GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure and estimation of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting periods. Actual results may differ from those estimates. The most significant estimates and assumptions impacting reported results are estimates of the Company’s crude oil and natural gas reserves, which are used to compute depreciation, depletion, amortization and impairment of proved crude oil and natural gas properties.
Cash and cash equivalents
The Company considers all highly liquid investments with original maturities of three months or less to be cash equivalents. The Company maintains its cash and cash equivalents in accounts that may not be federally insured. As of December 31, 2018,2020, the Company had cash deposits in excess of federally insured amounts of approximately $280.7$46.0 million. The Company has not experienced any losses in such accounts and believes it is not exposed to significant credit risk in this area.
Accounts receivable
Receivables arising from crude oil and natural gas sales and joint interest receivables are generally unsecured. Accounts receivable are due within 30 days and are considered delinquent after 60 days. The Company determinesCompany's method for determining its allowance for doubtful accountscredit losses was changed upon its January 1, 2020 adoption of ASU 2016-13 as subsequently discussed in Note 9. Allowance for Credit Losses. The Company's allowance for credit losses, as accounted for under legacy U.S. GAAP in effect as of December 31, 2019, was determined by considering a number of factors, including the length of time accounts are past due, the Company’s history of losses, and the customer or working interest owner’s ability to pay. The Company writes off specific receivables when they become noncollectable and any payments subsequently received on those receivables are credited to the allowance for doubtful accounts.credit losses. Write-offs of noncollectable receivables have historically not been material. The Company’s allowance for doubtful accountscredit losses totaled $2.4$2.5 millionand $2.2$2.4 million as of December 31, 20182020 and 2017, respectively, which is included in “ReceivablesJoint interest and other, net” on the consolidated balance sheets.2019, respectively. See Note 9. Allowance for Credit Losses for additional information.
Concentration of credit risk
The Company is subject to credit risk resulting from the concentration of its crude oil and natural gas receivables with significant purchasers. For the year ended December 31, 2018,2020, sales to the Company’s two largest purchaserpurchasers accounted for approximately 13% and 12% of the Company’s total crude oil and natural gas sales. No other purchaser accounted for more than 10% of the Company’s total crude oil and natural gas sales for 2018.2020. The Company generally does not require collateral and does not believe the loss of any single purchaser would materially impact its operating results, as crude oil and natural gas are fungible products with well-established markets and numerous purchasers in various regions.

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Notes to Consolidated Financial Statements



Inventories
Inventory is comprised of crude oil held in storage or as line fill in pipelines, pipeline imbalances, and tubular goods and equipment to be used in the Company’s exploration and development activities. Crude oil inventories are valued at the lower of cost or net realizable value primarily using the first-in, first-out inventory method. Tubular goods and equipment are valued primarily using a weighted average cost method applied to specific classes of inventory items.
The components of inventory as of December 31, 20182020 and 20172019 consisted of the following:
December 31,
In thousands20202019
Tubular goods and equipment$13,671 $14,880 
Crude oil58,486 94,656 
Total$72,157 $109,536 
  December 31,
In thousands 2018 2017
Tubular goods and equipment $14,623
 $14,946
Crude oil 73,921
 82,460
Total $88,544
 $97,406
In the first quarter of 2020 the Company recognized a $24.5 million impairment to reduce its crude oil inventory to estimated net realizable value at the time of impairment. The impairment is included in the caption “Property impairments” in the consolidated statements of comprehensive income (loss) for the year ended December 31, 2020.
Crude oil and natural gas properties
The Company uses the successful efforts method of accounting for crude oil and natural gas properties whereby costs incurred to acquire mineral interests in crude oil and natural gas properties, to drill and equip exploratory wells that find proved reserves, to drill and equip development wells, and expenditures for enhanced recovery operations are capitalized. Geological and geophysical costs, seismic costs incurred for exploratory projects, lease rentals and costs associated with unsuccessful exploratory wells or projects are expensed as incurred. Costs of seismic studies that are utilized in development drilling within an area of proved reserves are capitalized as development costs. To the extent a seismic project covers areas of both developmental and exploratory drilling, those seismic costs are proportionately allocated between capitalized development costs and exploration expense. Maintenance, repairs, and costs of injection are expensed as incurred.
Under the successful efforts method of accounting, the Company capitalizes exploratory drilling costs on the balance sheet pending determination of whether the well has found proved reserves in economically producible quantities. The Company capitalizes costs associated with the acquisition or construction of support equipment and facilities with the drilling and development costs to which they relate. If proved reserves are found by an exploratory well, the associated capitalized costs become part of well equipment and facilities. However, if proved reserves are not found, the capitalized costs associated with the well are expensed, net of any salvage value.
Production expenses are those costs incurred by the Company to operate and maintain its crude oil and natural gas properties and associated equipment and facilities. Production expenses include but are not limited to labor costs to operate the Company’s properties, repairs and maintenance, certain waste water disposal costs, utility costs, certain workover-related costs, and materials and supplies utilized in the Company’s operations.
Service property and equipment
Service property and equipment consist primarily of automobiles and aircraft; machinery and equipment; gathering and recycling systems; storage tanks; office and computer equipment, software, furniture and fixtures; and buildings and improvements. Major renewals and replacements are capitalized and stated at cost, while maintenance and repairs are expensed as incurred.
Depreciation and amortization of service property and equipment are provided in amounts sufficient to expense the cost of depreciable assets to operations over their estimated useful lives using the straight-line method. The estimated useful lives of service property and equipment are as follows:
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Service property and equipment
Useful Lives
In Years
Automobiles and aircraft5-10
Machinery and equipment6-10
Gathering and recycling systems15-30
Storage tanks10-30
Office and computer equipment, software, furniture and fixtures3-25
Buildings and improvements4-40

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Service property and equipmentUseful Lives
In Years
Automobiles and aircraft5-10
Machinery and equipment6-10
Gathering and recycling systems15-30
Storage tanks10-30
Office and computer equipment, software, furniture and fixtures3-25
Buildings and improvements4-40
Depreciation, depletion and amortization
Depreciation, depletion and amortization of capitalized drilling and development costs of producing crude oil and natural gas properties, including related support equipment and facilities, are computed using the unit-of-production method on a field basis based on total estimated proved developed reserves. Amortization of producing leaseholds is based on the unit-of-production method using total estimated proved reserves. In arriving at rates under the unit-of-production method, the quantities of recoverable crude oil and natural gas reserves are established based on estimates made by the Company’s internal geologists and engineers and external independent reserve engineers. Upon sale or retirement of properties, the cost and related accumulated depreciation, depletion and amortization are eliminated from the accounts and the resulting gain or loss, if any, is recognized. UnitSales of productionproved properties constituting a part of an amortization base are accounted for as normal retirements with no gain or loss recognized if doing so does not significantly affect the unit-of-production amortization rate. Unit-of-production rates are revised whenever there is an indication of a need, but at least in conjunction with semi-annual reserve reports. Revisions are accounted for prospectively as changes in accounting estimates.
Asset retirement obligations
The Company accounts for its asset retirement obligations by recording the fair value of a liability for an asset retirement obligation in the period in which a legal obligation is incurred and a corresponding increase in the carrying amount of the related long-lived asset. Subsequently, the capitalized asset retirement costs are charged to expense through the depreciation, depletion and amortization of crude oil and natural gas properties and the liability is accreted to the expected future abandonment cost ratably over the related asset’s life.
The Company’s primary asset retirement obligations relate to future plugging and abandonment costs and related disposal of facilities on its crude oil and natural gas properties. The following table summarizes the changes in the Company’s future abandonment liabilities from January 1, 20162018 through December 31, 2018:2020:
In thousands202020192018
Asset retirement obligations at January 1$153,673 $141,360 $114,406 
Accretion expense9,393 8,443 6,985 
Revisions (1)10,743 (1,762)13,075 
Plus: Additions for new assets7,048 8,392 9,070 
Less: Plugging costs and sold assets(1,181)(2,760)(2,176)
Total asset retirement obligations at December 31$179,676 $153,673 $141,360 
Less: Current portion of asset retirement obligations at December 31 (2)2,482 1,899 4,374 
Non-current portion of asset retirement obligations at December 31$177,194 $151,774 $136,986 
In thousands 2018 2017 2016
Asset retirement obligations at January 1 $114,406
 $96,178
 $102,909
Accretion expense 6,985
 5,886
 6,086
Revisions (1) 13,075
 7,801
 (12,755)
Plus: Additions for new assets 9,070
 6,884
 2,692
Less: Plugging costs and sold assets (2,176) (2,343) (2,754)
Total asset retirement obligations at December 31 $141,360
 $114,406
 $96,178
Less: Current portion of asset retirement obligations at December 31 (2) 4,374
 2,612
 1,742
Non-current portion of asset retirement obligations at December 31 $136,986
 $111,794
 $94,436
(1)     Revisions primarily represent changes in the present value of liabilities resulting from changes in estimated costs and economic lives of producing properties.
(1)Revisions primarily represent changes in the present value of liabilities resulting from changes in estimated costs and economic lives of producing properties.
(2)Balance is included in the caption “Accrued liabilities and other” in the consolidated balance sheets.
(2)    Balance is included in the caption “Accrued liabilities and other” in the consolidated balance sheets.
As of December 31, 20182020 and 2017,2019, net property and equipment on the consolidated balance sheets included $57.7$56.1 million and $40.0$55.8 million, respectively, of net asset retirement costs.
Asset impairment
Proved crude oil and natural gas properties are reviewed for impairment on a field-by-field basis each quarter. The estimated future cash flows expected in connection with the field are compared to the carrying amount of the field to determine if the carrying amount is recoverable. If the carrying amount of the field exceeds its estimated undiscounted future cash flows, the carrying amount of the field is reduced to its estimated fair value.
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Impairment losses for unproved properties are generally recognized by amortizing the portion of the properties’ costs which management estimates will not be transferred to proved properties over the lives of the leases based on drilling plans, experience of successful drilling, and the average holding period. The Company’s impairment assessments are affected by economic factors such as the results of exploration activities, commodity price outlooks, anticipated drilling programs, remaining lease terms, and potential shifts in business strategy employed by management.
Debt issuance costs
Costs incurred in connection with the execution of the Company’s notenotes payable and revolving credit facility and any amendments thereto are capitalized and amortized over the terms of the arrangements on a straight-line basis, the use of which approximates the effective interest method. Costs incurred upon the issuances of the Company’s various senior notes

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Notes to Consolidated Financial Statements


(collectively, (collectively, the “Notes”) were capitalized and are being amortized over the terms of the Notes using the effective interest method.
The Company had aggregate capitalized costs of $51.2$45.8 million and $58.2$40.0 million (net of accumulated amortization of $62.5$87.4 million and $51.8$73.7 million) relating to its long-term debt at December 31, 20182020 and 2017,2019, respectively. Unamortized capitalized costs associated with the Company’s Notes and note payable totaled $45.1$42.5 million and $55.0$35.3 million at December 31, 20182020 and 2017,2019, respectively, and are reflected as a reduction of “Long-term debt, net of current portion” on the consolidated balance sheets. Unamortized capitalized costs associated with the Company’s revolving credit facility totaled $6.1$3.3 million and $3.2$4.7 million at December 31, 20182020 and 2017,2019, respectively, and are reflected in “Other noncurrent assets” on the consolidated balance sheets.
For the years ended December 31, 2018, 20172020, 2019 and 2016,2018, the Company recognized amortization expense associated with capitalized debt issuance costs of $9.3$7.8 million, $9.1$8.3 million and $9.8$9.3 million, respectively, which are reflected in “Interest expense” on the consolidated statements of comprehensive income (loss).
Derivative instruments
The Company recognizes its derivative instruments on the balance sheet as either assets or liabilities measured at fair value with such amounts classified as current or long-term based on contractual settlement dates. The accounting for the changes in fair value of a derivative depends on the intended use of the derivative and resulting designation. The Company has not designated its derivative instruments as hedges for accounting purposes and, as a result, marks its derivative instruments to fair value and recognizes the changes in fair value in the consolidated statements of comprehensive income (loss). Gains and losses on crude oil and natural gas derivatives are reflected in under the caption “Gain (loss) on crude oil and natural gas derivatives,derivative instruments, net.” Gains and losses on diesel fuel derivatives are reflected in the caption “Operating costs and expenses—Net gain on sale of assets and other.”See Note 5. Derivative Instruments for additional information.
Fair value of financial instruments
The Company’s financial instruments consist primarily of cash, trade receivables, trade payables, derivative instruments and long-term debt. See Note 6. Fair Value Measurements for a discussion of the methods used to determine fair value for the Company’s financial instruments and the quantification of fair value for its derivatives and long-term debt obligations at December 31, 20182020 and 2017.2019.
Income taxes
Income taxes are accounted for using the asset and liability method under which deferred income taxes are recognized for the futuremethod. Deferred tax effects of temporary differences between financial statement carrying amounts and the tax basis of existing assets and liabilities are measured using the enacted statutory tax rates expected to apply to taxable income in effect at year-end.the years in which those differences are expected to be recovered or settled. The effect on deferred taxes fortax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The Company’s policy is to recognize penalties and interest related to unrecognized tax benefits, if any, in income tax expense. A

The Company establishes a valuation allowance for deferred tax assets is recorded whenif it believes it is more likely than not that the benefit from thesome or all of its deferred tax assetassets will not be realized. The Company recordedSignificant judgment is applied in evaluating the need for and the magnitude of appropriate valuation allowances of $0.3 million, $0.4 million, and $1.0 million for the years ended December 31, 2018, 2017, and 2016, respectively, against deferred tax assets associated with operating loss carryforwards generated by its Canadian subsidiary for which the Company does not expect to realize a benefit.

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Notes to Consolidated Financial Statements


assets. 
Earnings per share attributable to Continental Resources
Basic net income (loss) per share is computed by dividing net income (loss) attributable to the Company by the weighted-average number of shares outstanding for the period. In periods where the Company has net income, diluted earnings per share reflects the potential dilution of non-vested restricted stock awards, which are calculated using the treasury stock method. The following table presents the calculation of basic and diluted weighted average shares outstanding and net income (loss) per share attributable to the Company for the years ended December 31, 2018, 20172020, 2019 and 2016. 2018.
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 Year ended December 31,Year ended December 31,
In thousands, except per share data 2018 2017 2016In thousands, except per share data202020192018
Net income (loss) attributable to Continental Resources (numerator) (1) $988,317
 $789,447
 $(399,679)
Net income (loss) attributable to Continental Resources (numerator)Net income (loss) attributable to Continental Resources (numerator)$(596,869)$775,641 $988,317 
Weighted average shares (denominator):      Weighted average shares (denominator):
Weighted average shares - basic 371,854
 371,066
 370,380
Weighted average shares - basic361,538 370,699 371,854 
Non-vested restricted stock (2) 2,984
 2,702
 
Non-vested restricted stock (1)Non-vested restricted stock (1)1,839 2,984 
Weighted average shares - diluted 374,838
 373,768
 370,380
Weighted average shares - diluted361,538 372,538 374,838 
Net income (loss) per share attributable to Continental Resources: (1)      
Net income (loss) per share attributable to Continental Resources:Net income (loss) per share attributable to Continental Resources:
Basic $2.66
 $2.13
 $(1.08)Basic$(1.65)$2.09 $2.66 
Diluted $2.64
 $2.11
 $(1.08)Diluted$(1.65)$2.08 $2.64 
(1)
The Company remeasured its deferred income tax assets and liabilities at year-end 2017 in response to the enactment of the Tax Cuts and Jobs Act in December 2017, which resulted in a one-time decrease in income tax expense and corresponding increase in net income of $713.7 million ($1.92 per basic share and $1.91 per diluted share) for 2017. SeeNote 9. Income Taxes for further discussion. Additionally, 2017 results include a $59.6 million pre-tax loss accrualrecognized in conjunction with a litigation settlement as discussed in Note 11. Commitments and Contingencies—Litigation, which resulted in an after-tax decrease in 2017 net income of $37.0 million ($0.10 per basic and diluted share).
(1)    For the year ended December 31, 2020, the Company had a net loss and therefore the potential dilutive effect of approximately 934,000 weighted average non-vested restricted shares were not included in the calculation of diluted net loss per share because to do so would have been anti-dilutive to the computation.
(2)For the year ended December 31, 2016, the Company had a net loss and therefore the potential dilutive effect of approximately 2,303,000 weighted average non-vested restricted shares were not included in the calculation of diluted net loss per share because to do so would have been anti-dilutive to the computation.
Foreign currency translation
In 2014, the Company initiated exploratory drilling activitiesoperations in Canada through a wholly-owned Canadian subsidiary. The Company’s operations in Canada are immaterial.were immaterial and were sold in the fourth quarter of 2019. See Note 10. Income Taxes and Note 17. Property Acquisitions and Dispositions for further discussion. The Company has designated the Canadian dollar as the functional currency for its Canadian operations. Adjustments resulting from the process of translating foreign functional currency financial statements into U.S. dollars arewere included in “Accumulated other comprehensive income” within equity on the consolidated balance sheets and “Other comprehensive income, net of tax” in the consolidated statements of comprehensive income (loss).
Adoption of new accounting pronouncements in 2018pronouncement
Revenue recognition and presentation – In May 2014,On January 1, 2020 the Financial Accounting Standards Board ("FASB") issuedCompany adopted Accounting Standards Update ("ASU") 2014-09, Revenue from Contracts with Customers2016-13, Financial InstrumentsCredit Losses (Topic 606), which superseded nearly all previously existing revenue recognition guidance under U.S. GAAP. Subsequently, the FASB issued additional guidance to assist entities with implementation efforts, including the issuance326): Measurement of ASU 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net)Credit Losses on Financial Instruments. This new guidance became effectiveSee Note 9. Allowance for reporting periods beginning after December 15, 2017. The Company adopted the new revenue recognition and presentation guidance on January 1, 2018 as required. See Note 8. Revenues Credit Lossesfor discussion of the adoption impact and the applicable disclosures required by the new guidance.standard.
New accounting pronouncements not yet adopted at December 31, 20182020
LeasesIn February 2016,December 2019, the FASBFinancial Accounting Standards Board issued ASU 2016-02, Leases2019-12, Income Taxes (Topic 842), which requires companies740): Simplifying the Accounting for Income Taxes. This standard eliminates certain exceptions to recognize a rightthe guidance in Topic 740 related to the approach for intraperiod tax allocation, the methodology for calculating income taxes in an interim period, and the recognition of use asset and related liability ondeferred tax liabilities for outside basis differences. The new guidance also clarifies certain aspects of the balance sheet for the rights and obligations arising from leases with durations greater than 12 months.existing guidance, among other things. The standard became effective for interim and annual reporting periods beginning after December 15, 2018. The Company adopted the new standard on January 1, 2019 on a prospective basis using the simplified transition method prescribed by ASU 2018-11, Leases (Topic 842): Targeted Improvements. Offsetting lease assets and lease liabilities recognized by the Company on the adoption date totaled approximately $19 million, representing minimum payment obligations associated

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with drilling rig commitments, surface use agreements, equipment, and other leases with contractual durations in excess of one year. Such leases, all of which are operating leases, had a weighted average remaining life and discount rate of 5.4 years and 4.5%, respectively, as of January 1, 2019. The Company has elected to account for lease and non-lease components in its contracts as a single lease component for all asset classes. Additionally, the Company has elected not to apply the recognition requirements of ASU 2016-02 to leases with durations of twelve months or less. No cumulative-effect adjustment to retained earnings was recognized upon adoption of the new lease standard.
The value of lease assets and lease liabilities recognized under ASU 2016-02 will change with the passage of time and from changes in the nature, timing, and extent of the Company's contractual lease arrangements in effect from period to period. As a result, the lease assets and liabilities recognized by the Company as of January 1, 2019 may not be indicative of amounts to be recognized in future periods. The Company continues to work on finalizing its implementation of procedures to comply with the new disclosure requirements prescribed by ASU 2016-02.
Credit losses – In June 2016, the FASB issued ASU 2016-13, Financial InstrumentsCredit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This standard changes how entities will measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. The standard will replace the currently required incurred loss approach with an expected loss model for instruments measured at amortized cost. The standard is effective for interim and annual periods beginning after December 15, 20192020 and shall be applied usingon either a prospective basis, a retrospective basis for all periods presented, or a modified retrospective approach resulting inbasis through a cumulative effectcumulative-effect adjustment to retained earnings upon adoption. The Company continues to evaluatedepending on which aspects of the new standard and is unableare applicable to estimatean entity. The Company adopted the new standard on January 1, 2021 on a prospective basis, which did not have a material impact on its financial statement impact at this time; however, the impact is not expected to be material. Historically, the Company's credit losses on crude oil and natural gas sales receivables and joint interest receivables have been immaterial.position, results of operations, or cash flows.
Note 2. Supplemental Cash Flow Information
The following table discloses supplemental cash flow information about cash paid for interest and income tax payments and refunds. Also disclosed is information about investing activities that affects recognized assets and liabilities but does not result in cash receipts or payments.
 Year ended December 31,
In thousands202020192018
Supplemental cash flow information:
Cash paid for interest$256,633 $267,421 $270,927 
Cash paid for income taxes229 
Cash received for income tax refunds (1)9,600 107 7,893 
Non-cash investing activities:
Asset retirement obligation additions and revisions, net17,791 6,630 22,145 
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  Year ended December 31,
In thousands 2018 2017 2016
Supplemental cash flow information:      
Cash paid for interest $270,927
 $281,058
 $316,116
Cash paid for income taxes 
 2
 2
Cash received for income tax refunds 7,893
 257
 174
Non-cash investing activities:      
Asset retirement obligation additions and revisions, net 22,145
 14,685
 (10,063)

(1) Amount received in 2020 primarily represents alternative minimum tax refunds.
As of December 31, 20182020 and 2017,2019, the Company had $317.5$128.8 million and $302.8$262.7 million, respectively, of accrued capital expenditures included in “Net property and equipment” andwith an offsetting amount in “Accounts payable trade” in the consolidated balance sheets.

As of December 31, 2020 and 2019, the Company had $0.1 million and $5.6 million, respectively, of accrued contributions from noncontrolling interests included in "ReceivablesJoint interest and other" with an offsetting amount in "EquityNoncontrolling interests" in the condensed consolidated balance sheets.
As of December 31, 2020 and 2019, the Company had $1.0 million and $1.5 million, respectively, of accrued distributions to noncontrolling interests included in "Revenues and royalties payable" with an offsetting amount in "EquityNoncontrolling interests" in the condensed consolidated balance sheets.
On January 1, 2019 the Company adopted ASU 2016-02, Leases (Topic 842), which resulted in the non-cash recognition of offsetting right-of-use assets and lease liabilities totaling approximately $19 million upon adoption. See Note 11. Leases for additional information on right-of-use assets obtained in exchange for new operating lease liabilities for the years ended December 31, 2020 and 2019.

Note 3. Net Property and Equipment
Net property and equipment includes the following at December 31, 20182020 and 2017. 2019.
December 31,
In thousands20202019
Proved crude oil and natural gas properties$27,726,954 $26,611,429 
Unproved crude oil and natural gas properties368,256 319,592 
Service properties, equipment and other414,066 336,439 
Total property and equipment28,509,276 27,267,460 
Accumulated depreciation, depletion and amortization(14,771,984)(12,769,734)
Net property and equipment$13,737,292 $14,497,726 
  December 31,
In thousands 2018 2017
Proved crude oil and natural gas properties $24,060,625
 $21,362,199
Unproved crude oil and natural gas properties 291,564
 365,413
Service properties, equipment and other 324,758
 290,111
Total property and equipment 24,676,947
 22,017,723
Accumulated depreciation, depletion and amortization (10,807,147) (9,083,934)
Net property and equipment $13,869,800
 $12,933,789

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Note 4. Accrued Liabilities and Other
Accrued liabilities and other includes the following at December 31, 20182020 and 2017:2019:
December 31,
In thousands20202019
Prepaid advances from joint interest owners$25,209 $50,021 
Accrued compensation47,985 61,483 
Accrued production taxes, ad valorem taxes and other non-income taxes40,818 59,057 
Accrued interest50,009 56,953 
Current portion of asset retirement obligations2,482 1,899 
Other510 955 
Accrued liabilities and other$167,013 $230,368 
  December 31,
In thousands 2018 2017
Prepaid advances from joint interest owners $53,674
 $34,511
Accrued compensation 69,338
 65,308
Accrued production taxes, ad valorem taxes and other non-income taxes 52,105
 40,611
Accrued interest 64,483
 55,282
Accrued litigation settlement (see Note 11) 19,753
 59,600
Current portion of asset retirement obligations 4,374
 2,612
Other 3,092
 2,150
Accrued liabilities and other $266,819
 $260,074
Note 5. Derivative Instruments
Crude oil and natural gas derivatives
From time to time the Company has enteredenters into crude oil and natural gas swap and collar derivative contracts to economically hedge against the variability in cash flows associated with future sales of crude oil and natural gas production. The Company recognizes allits derivative instruments on the balance sheet as either assets or liabilities measured at fair value. The Company has not designated its crude oil and natural gas derivative instruments as hedges for accounting purposes and, as a result, marks such derivative instruments to fair value and recognizes the changes in fair value in the consolidated statements of comprehensive income (loss) under the caption “Gain (loss) on crude oil and natural gas derivatives, net.”
The Company's natural gas derivative contracts are settled based upon reported NYMEX Henry Hub settlement prices. The estimated fair value of derivativesderivative contracts is based upon various factors, including commodity exchange prices, over-the-counter quotations, and, in the case of collars, and written call options, volatility, the risk-free interest rate, and the time to expiration. The calculation of the fair value of collars and written call options requires the use of an option-pricing model. See Note 6. Fair Value Measurements.
With respect to a natural gas fixed price swap contract, the counterparty is required to make a payment to the Company if the settlement price for any settlement period is less than the swap price, and the Company is required to make a payment to the counterparty if the settlement price for any settlement period is greater than the swap price. For a natural gas collar contract, the counterparty is required to make a payment to the Company if the settlement price for any settlement period is below the floor price and the Company is required to make a payment to the counterparty if the settlement price for any settlement period is above the ceiling price. Neither party is required to make a payment to the other party if the settlement price for any settlement period is between the floor price and the ceiling price.
At December 31, 2018,2020 the Company had outstanding natural gas derivative contracts as set forth in the tabletables below. The volumes reflected below represent an aggregation of multiple derivative contracts having similar remaining durations expected to be realized ratably over the reflected periods. At December 31, 2018 the Company had no outstanding crude oil derivative contracts.

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      Floors Ceilings
Period and Type of Contract MMBtus Swaps Weighted Average Price Range Weighted average price Range Weighted average price
January 2019 - March 2019            
Swaps - Henry Hub 4,950,000
 $4.70
        
April 2019 - December 2019            
Swaps - Henry Hub 95,425,000
 $2.78
        
January 2019 - March 2019            
Collars - Henry Hub 4,950,000
   $4.25
 $4.25
 $5.50 - $5.58 $5.52

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Collars
Natural gas derivativesFloorsCeilings
Swaps Weighted Average PriceRangeWeighted Average PriceRangeWeighted Average Price
Period and Type of ContractMMBtus
January 2021 - March 2021
Swaps - Henry Hub10,800,000 $2.90 
Collars - Henry Hub22,500,000 $2.65 - $3.00$2.78 $3.31 - $4.00$3.69 
April 2021 - June 2021
Swaps - Henry Hub3,609,000 $2.59 
Collars - Henry Hub13,650,000 $2.50 - $2.60$2.58 $3.06 - $3.43$3.24 
July 2021 - September 2021
Swaps - Henry Hub3,069,000 $2.59 
Collars - Henry Hub13,800,000 $2.50 - $2.60$2.58 $3.06 - $3.43$3.24 
Crude oil and natural gas derivative
Crude oil derivatives
Period and Type of ContractBblsFloor PriceCeiling Price
January 2021
Collar - WTI465,000 $41.60 $50.00 
Derivative gains and losses
Cash receipts and payments in the following table reflect the gaingains or losslosses on derivative contracts which matured during the applicable period, calculated as the difference between the contract price and the market settlement price of matured contracts. The Company's derivative contracts are settled based upon reported settlement prices on commodity exchanges, with crude oil derivative settlements based on NYMEX West Texas Intermediate ("WTI") pricing and natural gas derivative settlements based on NYMEX Henry Hub pricing. Non-cash gains and losses below represent the change in fair value of derivative instruments which continuecontinued to be held at period end and the reversal of previously recognized non-cash gains or losses on derivative contracts that matured during the period.
 Year ended December 31,
In thousands202020192018
Cash received (paid) on derivatives:
Crude oil fixed price swaps$(31,179)$$
Natural gas fixed price swaps1,071 58,836 (36,939)
Natural gas collars1,958 5,859 
Cash received (paid) on derivatives, net(28,150)64,695 (36,939)
Non-cash gain (loss) on derivatives:
Crude oil collars(227)
Natural gas fixed price swaps2,043 (10,130)7,527 
Natural gas collars11,676 (5,482)5,482 
Non-cash gain (loss) on derivatives, net13,492 (15,612)13,009 
Gain (loss) on derivative instruments, net$(14,658)$49,083 $(23,930)
  Year ended December 31,
In thousands 2018 2017 2016
Cash received (paid) on derivatives:      
Natural gas fixed price swaps $(36,939) $40,095
 $88,823
Natural gas collars 
 (10,539) 
Cash received (paid) on derivatives, net (36,939) 29,556
 88,823
Non-cash gain (loss) on derivatives:      
Crude oil written call options 
 
 38
Natural gas fixed price swaps 7,527
 18,960
 (120,784)
Natural gas collars 5,482
 43,131
 (39,936)
Non-cash gain (loss) on derivatives, net 13,009
 62,091
 (160,682)
Gain (loss) on crude oil and natural gas derivatives, net $(23,930) $91,647
 $(71,859)

Diesel fuel derivatives
The Company previously entered into diesel fuel swap derivative contracts, all of which matured on or before December 31, 2017, to economically hedge against the variability in cash flows associated with purchases of diesel fuel for use in drilling activities. The Company did not designate its diesel fuel derivatives as hedges for accounting purposes and, as a result, marked the derivative instruments to fair value and recognized the changes in fair value in the consolidated statements of comprehensive income (loss) under the caption “Operating costs and expenses—Net gain on sale of assets and other.”
Cash receipts in the following table reflect gains on diesel fuel derivatives which matured during the respective period, calculated as the difference between the contract price and the market settlement price of matured contracts. Non-cash gains and losses below represent the change in fair value of diesel fuel derivatives held at period end, if any, and the reversal of previously recognized non-cash gains or losses on derivative contracts that matured during the respective period.
  Year ended December 31,
In thousands 2017 2016
Cash received on diesel fuel derivatives $2,845
 $699
Non-cash gain (loss) on diesel fuel derivatives (4,060) 4,060
Gain (loss) on diesel fuel derivatives, net $(1,215) $4,759


Balance sheet offsetting of derivative assets and liabilities
The Company’s derivative contracts are recorded at fair value in the consolidated balance sheets under the captions “Derivative assets”, “Noncurrent derivative assets”,assets,” “Derivative liabilities”,assets, noncurrent,” “Derivative liabilities,” and “Noncurrent derivative liabilities”,“Derivative liabilities, noncurrent,” as applicable. Derivative assets and liabilities with the same counterparty that are subject to contractual terms which provide for net settlement are reported on a net basis in the consolidated balance sheets.

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The following table presents the gross amounts of recognized natural gas derivative assets and liabilities, as applicable, the amounts offset under netting arrangements with counterparties, and the resulting net amounts presented in the consolidated balance sheets for the periods presented,at December 31, 2020, all at fair value. The Company had no outstanding commodity derivative instruments at December 31, 2019.
December 31,
In thousands20202019
Commodity derivative assets:
Gross amounts of recognized assets$15,900 $
Gross amounts offset on balance sheet(597)
Net amounts of assets on balance sheet15,303 
Commodity derivative liabilities:
Gross amounts of recognized liabilities(2,408)
Gross amounts offset on balance sheet597 
Net amounts of liabilities on balance sheet$(1,811)$
  December 31,
In thousands 2018 2017
Commodity derivative assets:    
Gross amounts of recognized assets $16,789
 $2,603
Gross amounts offset on balance sheet (1,177) 
Net amounts of assets on balance sheet 15,612
 2,603
Commodity derivative liabilities:    
Gross amounts of recognized liabilities (1,177) 
Gross amounts offset on balance sheet 1,177
 
Net amounts of liabilities on balance sheet $
 $
The following table reconciles the net amounts disclosed above to the individual financial statement line items in the consolidated balance sheets.
December 31,
In thousands20202019
Derivative assets$15,303 $
Derivative assets, noncurrent
Net amounts of assets on balance sheet15,303 
Derivative liabilities(227)
Derivative liabilities, noncurrent(1,584)
Net amounts of liabilities on balance sheet(1,811)
Total derivative assets, net$13,492 $
  December 31,
In thousands 2018 2017
Derivative assets $15,612
 $2,603
Noncurrent derivative assets 
 
Net amounts of assets on balance sheet 15,612
 2,603
Derivative liabilities 
 
Noncurrent derivative liabilities 
 
Net amounts of liabilities on balance sheet 
 
Total derivative assets, net $15,612
 $2,603
Note 6. Fair Value Measurements
The Company follows a three-level valuation hierarchy for disclosure of fair value measurements. The valuation hierarchy categorizes assets and liabilities measured at fair value into one of three different levels depending on the observability of the inputs employed in the measurement. The three levels are defined as follows:
Level 1: Observable inputs that reflect unadjusted quoted prices for identical assets or liabilities in active markets as of the reporting date.
Level 2: Observable market-based inputs or unobservable inputs corroborated by market data. These are inputs other than quoted prices in active markets included in Level 1, which are either directly or indirectly observable as of the reporting date.
Level 3: Unobservable inputs not corroborated by market data and may be used with internally developed methodologies that result in management’s best estimate of fair value.
A financial instrument’s categorization within the hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Level 1 inputs are given the highest priority in the fair value hierarchy while Level 3 inputs are given the lowest priority. The Company’s assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the placement of assets and liabilities within the levels of the hierarchy. As Level 1 inputs generally provide the most reliable evidence of fair value, the Company uses Level 1 inputs when available. The Company’s policy is to recognize transfers between the hierarchy levels as of the beginning of the reporting period in which the event or change in circumstances caused the transfer.

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Assets and liabilities measuredLiabilities Measured at fair valueFair Value on a recurring basisRecurring Basis
The Company’s derivative instruments are reported at fair value on a recurring basis. In determining the fair values of swap contracts, a discounted cash flow method is used due to the unavailability of relevant comparable market data for the Company’s exact contracts. The discounted cash flow method estimates future cash flows based on quoted market prices for forward commodity prices and a risk-adjusted discount rate. The fair values of swap contracts are calculated mainly using significant observable inputs (Level 2). Calculation of the fair values of collars requires the use of an industry-standard option pricing model that considers various inputs including quoted forward prices for commodities, time value, volatility factors, and current market and contractual prices for the underlying instruments, as well as other relevant economic measures. These assumptions are observable in the marketplace or can be corroborated by active markets or broker quotes and are therefore designated as Level 2 within the valuation hierarchy. The Company’s calculation of fair value for each of its derivative positions is compared to the counterparty valuation for reasonableness.
The following tables summarizetable summarizes the valuation of financialderivative instruments by pricing levels that were accounted for at fair value on a recurring basis as of December 31, 2018 and 2017.2020. The Company had no outstanding commodity derivative instruments at December 31, 2019.
  Fair value measurements at December 31, 2018 using:  
In thousands Level 1 Level 2 Level 3 Total
Derivative assets:  
Swaps $
 $10,130
 $
 $10,130
Collars 
 5,482
 
 5,482
Total $
 $15,612
 $
 $15,612
 Fair value measurements at December 31, 2017 using:  
Fair value measurements at December 31, 2020 using: 
In thousands Level 1 Level 2 Level 3 TotalIn thousandsLevel 1Level 2Level 3Total
Derivative assets:  
Derivative assets (liabilities):Derivative assets (liabilities):
Swaps $
 $2,603
 $
 $2,603
Swaps$$2,043 $$2,043 
CollarsCollars11,449 11,449 
Total $
 $2,603
 $
 $2,603
Total$$13,492 $$13,492 
 
Assets measuredMeasured at fair valueFair Value on a nonrecurring basisNonrecurring Basis
Certain assets are reported at fair value on a nonrecurring basis in the consolidated financial statements. The following methods and assumptions were used to estimate the fair values for those assets.
Asset impairments – Proved crude oil and natural gas properties are reviewed for impairment on a field-by-field basis each quarter. The estimated future cash flows expected in connection with the field are compared to the carrying amount of the field to determine if the carrying amount is recoverable. If the carrying amount of the field exceeds its estimated undiscounted future cash flows, the carrying amount of the field is reduced to its estimated fair value. Risk-adjusted probable and possible reserves may be taken into consideration when determining estimated future net cash flows and fair value when such reserves exist and are economically recoverable. Due to the unavailability of relevant comparable market data, a discounted cash flow method is used to determine the fair value of proved properties. TheSignificant unobservable inputs (Level 3) utilized in the determination of discounted cash flow method estimates future net cash flows based on the Company’s estimates ofinclude future crude oil and natural gas production, commodity prices based on commodity futures price strips adjusted for differentials, forecasted production based on decline curve analysis, estimated future operating and development costs, property ownership interests, and a risk-adjusted10% discount rate. The fair value of proved crude oil and natural gas properties is calculated using significant unobservable inputs (Level 3). The following table sets forth quantitative information about the significant unobservable inputs used by the Company atAt December 31, 2018 to calculate2020, the fair value of proved crude oilCompany's commodity price assumptions were based on forward NYMEX strip prices through year-end 2025 and natural gas properties using a discounted cash flow method.
Unobservable InputAssumption
Future productionFuture production estimates for each property
Forward commodity pricesForward NYMEX strip prices through 2023 (adjusted for differentials), escalating 3% per year thereafter
Operating costsEstimated costs for the current year, escalating 3% per year thereafter
Productive life of propertiesUp to 50 years
Discount rate10%

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were then escalated at 3% per year thereafter. Operating cost assumptions were based on current costs escalated at 3% per year beginning in 2022.
Unobservable inputs to the Company's fair value assessmentassessments are reviewed quarterly and are revised as warranted based on a number of factors, including reservoir performance, new drilling, crude oil and natural gas prices, changes in costs, technological advances, new geological or geophysical data, or other economic factors. Fair value measurements of proved properties are reviewed and approved by certain members of the Company’s management.
For the years ended December 31, 2018, 2017,2020, 2019, and 2016,2018, the Company determined the carrying amounts of certain proved properties were not recoverable from future cash flows, and therefore, were impaired. Such impairments totaled $207.1 million, $3.7 million, and $18.0 million for 2020, 2019, and 2018 respectively, which reflect write-offs of various non-corefor 2020 reflected fair value adjustments on legacy properties in the North and South regions.
Impairments of proved properties totaled $82.3Red River Units totaling $168.1 million for 2017, which reflect fair value adjustments in the Arkoma Woodford field ($81.2 million) and various non-core properties in the North and South regions ($1.1 million).totaling $14.5 million. The impaired properties in 2017 were written down to their estimated fair value at the time of impairment of $72$145.7 million.
Impairments for 2020 also include a $24.5 million impairment recognized in the first quarter of proved properties totaled $2.9 million for 2016 primarily related2020 to reduce the Company's crude oil inventory to estimated net realizable value at the time of impairment. Proved property impairments recognized in 2019 and 2018 reflected write-offs of various non-core properties in the North region that were written down to their estimated fair value at the time of impairment of $0.7 million.and South regions.
Certain unproved crude oil and natural gas properties were impaired during the years ended December 31, 2018, 2017,2020, 2019, and 2016,2018, reflecting recurring amortization of undeveloped leasehold costs on properties the Company expects will not be
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transferred to proved properties over the lives of the leases based on drilling plans, experience of successful drilling, and the average holding period.
The following table sets forth the non-cash impairments of both proved and unproved properties for the indicated periods. Proved and unproved property impairments are recorded under the caption “Property impairments” in the consolidated statements of comprehensive income (loss).
 Year ended December 31, Year ended December 31,
In thousands 2018 2017 2016In thousands202020192018
Proved property impairments $18,037
 $82,340
 $2,895
Proved property and inventory impairmentsProved property and inventory impairments$207,119 $3,745 $18,037 
Unproved property impairments 107,173
 155,030
 234,397
Unproved property impairments70,822 82,457 107,173 
Total $125,210
 $237,370
 $237,292
Total$277,941 $86,202 $125,210 
Financial instruments not recordedInstruments Not Recorded at fair valueFair Value
The following table sets forth the estimated fair values of financial instruments that are not recorded at fair value in the consolidated financial statements. See Note 7. Long-Term Debt for discussion of the changes in the Company's outstanding debt during the year ended December 31, 2020.
 December 31, 2018 December 31, 2017 December 31, 2020December 31, 2019
In thousands Carrying Amount Estimated Fair Value Carrying Amount Estimated Fair ValueIn thousandsCarrying AmountEstimated Fair ValueCarrying AmountEstimated Fair Value
Debt:        Debt:
Revolving credit facility $
 $
 $188,000
 $188,000
Note payable 7,700
 7,700
 9,974
 9,900
Credit facilityCredit facility$160,000 $160,000 $55,000 $55,000 
Notes payableNotes payable24,590 24,700 5,351 5,400 
5% Senior Notes due 2022 1,598,404
 1,590,900
 1,997,576
 2,040,000
5% Senior Notes due 2022630,470 632,900 1,099,165 1,108,700 
4.5% Senior Notes due 2023 1,488,960
 1,476,300
 1,486,690
 1,526,800
4.5% Senior Notes due 2023646,943 669,900 1,491,339 1,571,400 
3.8% Senior Notes due 2024 993,151
 947,200
 992,036
 988,800
3.8% Senior Notes due 2024906,922 939,500 994,310 1,034,200 
4.375% Senior Notes due 2028 988,617
 942,800
 988,061
 987,200
4.375% Senior Notes due 2028990,746 1,024,400 989,661 1,063,700 
5.75% Senior Notes due 20315.75% Senior Notes due 20311,480,879 1,651,900 
4.9% Senior Notes due 2044 691,517
 618,800
 691,354
 679,900
4.9% Senior Notes due 2044691,868 689,600 691,688 742,000 
Total debt $5,768,349
 $5,583,700
 $6,353,691
 $6,420,600
Total debt$5,532,418 $5,792,900 $5,326,514 $5,580,400 
The fair value of revolving credit facility borrowings approximate carrying value based on borrowing rates available to the Company for bank loans with similar terms and maturities and are classified as Level 2 in the fair value hierarchy.

The fair value of the notenotes payable is determined using a discounted cash flow approach based on the interest rate and payment terms of the notenotes payable and an assumed discount rate. The fair value of the notenotes payable is significantly influenced by the discount rate assumption, which is derived by the Company and is unobservable. Accordingly, the fair value of the notenotes payable is classified as Level 3 in the fair value hierarchy.

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The fair values of the 5% Senior Notes due 2022 (“2022 Notes”), the 4.5% Senior Notes due 2023 (“2023 Notes”), the 3.8% Senior Notes due 2024 (“2024 Notes”), the 4.375% Senior Notes due 2028 (“2028 Notes”), the 5.75% Senior Notes due 2031, and the 4.9% Senior Notes due 2044 (“2044 Notes”) are based on quoted market prices and, accordingly, are classified as Level 1 in the fair value hierarchy.
The carrying values of all classes of cash and cash equivalents, trade receivables, and trade payables are considered to be representative of their respective fair values due to the short term maturities of those instruments.
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Note 7. Long-Term Debt
Long-term debt, net of unamortized discounts, premiums, and debt issuance costs totaling $39.4$43.7 million and $44.3$33.9 million at December 31, 20182020 and 2017,2019, respectively, consists of the following.
December 31,
In thousands20202019
Credit facility$160,000 $55,000 
Notes payable24,590 5,351 
5% Senior Notes due 2022630,470 1,099,165 
4.5% Senior Notes due 2023646,943 1,491,339 
3.8% Senior Notes due 2024906,922 994,310 
4.375% Senior Notes due 2028990,746 989,661 
5.75% Senior Notes due 20311,480,879 
4.9% Senior Notes due 2044691,868 691,688 
Total debt5,532,418 5,326,514 
Less: Current portion of long-term debt2,245 2,435 
Long-term debt, net of current portion$5,530,173 $5,324,079 
  December 31,
In thousands 2018 2017
Revolving credit facility $
 $188,000
Note payable 7,700
 9,974
5% Senior Notes due 2022 1,598,404
 1,997,576
4.5% Senior Notes due 2023 1,488,960
 1,486,690
3.8% Senior Notes due 2024 993,151
 992,036
4.375% Senior Notes due 2028 988,617
 988,061
4.9% Senior Notes due 2044 691,517
 691,354
Total debt 5,768,349
 6,353,691
Less: Current portion of long-term debt 2,360
 2,286
Long-term debt, net of current portion $5,765,989
 $6,351,405
Credit Facility
Revolving credit facility
In April 2018, theThe Company entered into a newhas an unsecured revolving credit facility, maturing inon April 9, 2023, with aggregate lender commitments totaling $1.5 billion, which may be increased up to a total of $4.0 billion upon agreement between the Company and participating lenders. In connection with the execution of the new credit facility, the Company terminated its then-existing $2.75 billion credit facility that was due to mature in May 2019.billion. The Company had no$160 million of outstanding borrowings on its credit facility at December 31, 2018.2020.
Borrowings under the creditCredit facility if any,borrowings bear interest at market-based interest rates plus a margin based on the terms of the borrowing and the credit ratings assigned to the Company’sCompany's senior, unsecured, long-term indebtedness. The weighted-average interest rate on outstanding credit facility borrowings at December 31, 2020 was 1.9%.
The Company had approximately $1.33 billion of borrowing availability on its credit facility at December 31, 2020 after considering outstanding borrowings and letters of credit. The Company incurs commitment fees based on currently assigned credit ratings of 0.20%0.25% per annum on the daily average amount of unused borrowing availability under its credit facility.availability.
The credit facility contains certain restrictive covenants including a requirement that the Company maintain a consolidated net debt to total capitalization ratio of no greater than 0.65 to 1.00. This ratio represents the ratio of net debt (calculated as total face value of debt plus outstanding letters of credit less cash and cash equivalents) divided by the sum of net debt plus totalshareholders’ equity plus, to the extent resulting in a reduction of total shareholders’ equity, the amount of any non-cash impairment charges incurred, net of any tax effect, after June 30, 2014. The Company was in compliance with the credit facility covenants at December 31, 2018.2020.
Senior notesNotes
In November 2020, the Company issued $1.5 billion of 5.75% Senior Notes due 2031 and received total net proceeds of $1.49 billion after deducting the initial purchasers' fees. The 2031 Notes were sold at par in a private placement transaction exempt from the registration requirements of the Securities Act to qualified institutional buyers in reliance on Rule 144A of the Securities Act. The Company used the net proceeds from the offering to finance the partial repurchases of its 2022 Notes and 2023 Notes in November 2020 as further discussed below, to repay a portion of the borrowings outstanding on its credit facility, and for general corporate purposes.
The following table summarizes the face values, maturity dates, semi-annual interest payment dates, and optional redemption periods related to the Company’s outstanding senior note obligations at December 31, 2018.

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   2022 Notes (1)2023 Notes2024 Notes2028 Notes2031 Notes2044 Notes
Face value (in thousands)$630,782$649,625$911,000$1,000,000$1,500,000$700,000
Maturity date  Sep 15, 2022April 15, 2023June 1, 2024January 15, 2028January 15, 2031June 1, 2044
Interest payment dates  Mar 15,  Sep 15April 15, Oct 15June 1, Dec 1Jan 15, July 15Jan 15, Jul 15June 1, Dec 1
Make-whole redemption period (2)Jan 15, 2023Mar 1, 2024Oct 15, 2027Jul 15, 2030Dec 1, 2043
(1)The Company has the option to redeem all or a portion of its remaining 2022 Notes at the decreasing redemption prices specified in the indenture governing the 2022 Notes plus any accrued and unpaid interest to the date of redemption.
   2022 Notes (1)  2023 Notes  2024 Notes 2028 Notes 2044 Notes
Face value (in thousands) $1,600,000 $1,500,000 $1,000,000 $1,000,000 $700,000
Maturity date  Sep 15, 2022  April 15, 2023  June 1, 2024 January 15, 2028 June 1, 2044
Interest payment dates  March 15,  Sep 15  April 15, Oct 15  June 1, Dec 1 Jan 15, July 15 June 1, Dec 1
Make-whole redemption period (2)    Jan 15, 2023  Mar 1, 2024 Oct 15, 2027 Dec 1, 2043
(2)At any time prior to the indicated dates, the Company has the option to redeem all or a portion of its senior notes of the applicable series at the “make-whole” redemption amounts specified in the respective senior note indentures plus any accrued and unpaid interest to the date of redemption. On or after the indicated dates, the Company may redeem all or a portion of its senior notes at a redemption amount equal to 100% of the principal amount of the senior notes being redeemed plus any accrued and unpaid interest to the date of redemption.
(1)The Company has the option to redeem all or a portion of its remaining 2022 Notes at the decreasing redemption prices specified in the indenture related to the 2022 Notes plus any accrued and unpaid interest to the date of redemption.
(2)At any time prior to the indicated dates, the Company has the option to redeem all or a portion of its senior notes of the applicable series at the “make-whole” redemption amounts specified in the respective senior note indentures plus any accrued and unpaid interest to the date of redemption. On or after the indicated dates, the Company may redeem all or a portion of its senior notes at a redemption amount equal to 100% of the principal amount of the senior notes being redeemed plus any accrued and unpaid interest to the date of redemption.
The Company’s senior notes are not subject to any mandatory redemption or sinking fund requirements.
The indentures governing the Company’s senior notes contain covenants that, among other things, limit the Company’s ability to create liens securing certain indebtedness, enter into certain sale-leaseback transactions, or consolidate, merge or transfer certain assets. The senior noteThese covenants are subject to a number of important exceptions and qualifications. The Company was in compliance with these covenants at December 31, 2018.2020.
ThreeThe senior notes are obligations of Continental Resources, Inc. Additionally, three of the Company’s wholly-owned subsidiaries, Banner Pipeline Company, L.L.C., CLR Asset Holdings, LLC, and The Mineral Resources Company, the value of whose assets, equity, and results of operations are minor,not material, fully and unconditionally guarantee the senior notes on a joint and several basis. The Company’s other subsidiaries, the value of whose assets, equity, and results of operations attributable to the Company are minor,not material, do not guarantee the senior notes.
2018 partialRetirement of Senior Notes
2020
In March 2020, the Company repurchased a portion of its 2023 Notes and 2024 Notes in open market transactions at a substantial discount to the face value of the notes, including $33.4 million face value of its 2023 Notes at an aggregate cost of $19.5 million and $7.0 million face value of its 2024 Notes at an aggregate cost of $3.8 million, in each case, including accrued and unpaid interest to the repurchase dates.
In April 2020, the Company repurchased an additional $17.0 million face value of its 2023 Notes at an aggregate cost of $9.8 million and an additional $82.0 million face value of its 2024 Notes at an aggregate cost of $43.1 million, in each case, including accrued and unpaid interest to the repurchase dates.
The repurchased notes were canceled by the Company. The Company recognized pre-tax gains on extinguishment of debt in the 2020 first quarter related to the March 2020 repurchases totaling $17.6 million and additional pre-tax gains on extinguishment of debt in the 2020 second quarter related to the April 2020 repurchases totaling $47.0 million, which included the pro-rata write-off of deferred financing costs and unamortized debt discount associated with the notes. The gains are reflected in the caption “Gain (loss) on extinguishment of debt” in the consolidated statements of comprehensive income (loss).
In November 2020, the Company repurchased $469.2 million of its 2022 Notes using proceeds from the previously described issuance of new 2031 Notes. For the 2022 Notes, the purchase price was equal to 100.250% of the principal amount repurchased plus accrued and unpaid interest to the repurchase date. The aggregate of the principal amount, premium, and accrued interest paid upon repurchase was $475.0 million. The Company recorded a pre-tax loss on extinguishment of debt related to the repurchase of $1.4 million, which included the premium and pro-rata write-off of deferred financing costs and unamortized debt premium associated with the notes.
See Note 21. Subsequent Event for discussion of the Company's additional redemption of senior notes2022 Notes subsequent to December 31, 2020.
In November 2020, the Company also repurchased $800.0 million of its 2023 Notes using proceeds from the previously described issuance of new 2031 Notes. For the 2023 Notes, the purchase price was equal to 103.000% of the principal amount repurchased plus accrued and unpaid interest to the repurchase date. The aggregate of the principal amount, premium, and
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accrued interest paid upon repurchase was $828.0 million. The Company recorded a pre-tax loss on extinguishment of debt related to the repurchase of $27.4 million, which included the premium and pro-rata write-off of deferred financing costs associated with the notes.
2019
In September 2019, the Company redeemed $500 million of its previously outstanding $1.6 billion of 2022 Notes. The redemption price was equal to 100.833% of the principal amount called for redemption plus accrued and unpaid interest to the redemption date. The aggregate of the principal amount, redemption premium, and accrued interest paid upon redemption was $516.5 million. The Company recorded a pre-tax loss on extinguishment of debt related to the redemption of $4.6 million, which included the redemption premium and pro-rata write-off of deferred financing costs and unamortized debt premium associated with the notes.
2018
In August 2018, the Company redeemed $400 million or 20%, of its previouslyoriginal outstanding $2.0 billion of 5% Senior Notes due 2022.2022 Notes. The redemption price was equal to 101.667% of the principal amount called for redemption plus accrued and unpaid interest to the redemption date in accordance with the terms of the 2022 Notes and the related indenture under which the 2022 Notes were issued.
date. The aggregate of the principal amount, redemption premium, and accrued interest paid upon redemption of the 2022 Notes was $415.1 million. The Company recorded a pre-tax loss on extinguishment of debt related to the redemption of $7.1 million, which included the redemption premium and pro-rata write-off of deferred financing costs and unamortized debt premium associated with the notes. The loss is reflected under the caption “Loss on extinguishment of debt” in the consolidated statements of comprehensive income (loss).
NoteNotes payable
In February 2012, 20 Broadway Associates LLC, a wholly-owned subsidiary ofJune 2020, the Company borrowed $22an aggregate of $26.0 million under atwo 10-year amortizing term loanloans secured by the Company’s corporate office building and its interest in parking facilities in Oklahoma City, Oklahoma. The loan bearsloans mature in May 2030 and bear interest at a fixed rate of 3.14%3.50% per annum.annum through June 9, 2025, at which time the interest rate will be reset and fixed through the maturity date. Principal and interest are payable monthly through the loan’s maturity date of February 26, 2022. Accordingly, approximately $2.4and, accordingly, $2.2 million is reflected as a current liability under the caption “Current portion of long-term debt” in the consolidated balance sheets as of December 31, 2018.2020 associated with the loans. A portion of the proceeds from the new loans was used to fully repay the Company's previous note payable that was set to mature in February 2022, which had a balance at pay-off of $4.4 million.
Note 8. Revenues
Adoption of new revenue recognition and disclosure guidance
In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606), which generally requires an entity to identify performance obligations in its contracts, estimate the amount of consideration to be received, allocate the consideration to each separate performance obligation, and recognize revenue as obligations are satisfied. Additionally, the standard requires expanded disclosures related to revenue recognition.
Subsequent to the issuance of ASU 2014-09, the FASB issued additional guidance to assist entities with implementation efforts, including the issuance of ASU 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net), pertaining to the presentation of revenues on a gross basis (revenues presented separately from associated expenses) versus a net basis. This guidance requires an entity to record revenue on a gross

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basis if it controls a promised good or service before transferring it to a customer, whereas an entity records revenue on a net basis if its role is to arrange for another entity to provide the goods or services to a customer. Applying the guidance in ASU 2016-08 requires significant judgment in determining the point in time when control of products transfers to customers.
The Company adopted the new revenue recognition and presentation guidance on January 1, 2018 using a modified retrospective transition approach to all applicable contracts at the date of initial application, whereby the standard has been applied for periods commencing after December 31, 2017 and prior period results have not been adjusted to conform to current presentation. Adoption of the new guidance had no cumulative effect impact on the Company's retained earnings at January 1, 2018.
The new guidance does not have a material impact on the timing of the Company’s revenue recognition or its financial position, results of operations, net income, or cash flows, but does impact the Company's presentation of revenues and expenses under the gross-versus-net presentation guidance in ASU 2016-08. In years prior to 2018, the Company generally presented its revenues net of costs incurred to transport its production to market. Under the new guidance, revenues and transportation expenses associated with production originating from the Company’s operated properties are now reported on a gross basis as further discussed below. The changes from net to gross presentation resulted in an increase in revenues and a corresponding increase in separately reported transportation expenses, with no net effect on the Company’s results of operations, net income, or cash flows for the year ended December 31, 2018.
The following table reflects the change in presentation of revenues and applicable expenses on the Company's 2018 results under the new and previous guidance.
  Year ended December 31, 2018 
In thousands New Standard Prior Presentation Change 
Revenues:       
Crude oil and natural gas sales $4,678,722
 $4,487,135
 $191,587
 
Loss on natural gas derivatives, net (23,930) (23,930) 
 
Crude oil and natural gas service operations 54,794
 54,794
 
 
Total revenues $4,709,586
 $4,517,999
 $191,587
 
Operating costs and expenses:       
Transportation expenses $191,587
 $
 $191,587
 
Net income $989,700
 $989,700
 $
 
Revenue from contracts with customers
Below is a discussion of the nature, timing, and presentation of revenues arising from the Company's major revenue-generating arrangements.
Operated crude oil revenues – The Company pays third parties to transport the majority of its operated crude oil production from lease locations to downstream market centers, at which time the Company's customers take title and custody of the product in exchange for prices based on the particular market where the product was delivered. Operated crude oil revenues are recognized during the month in which control transfers to the customer and it is probable the Company will collect the consideration it is entitled to receive. Crude oil sales proceeds from operated properties are generally received by the Company within one month after the month in which a sale has occurred. Operated crude oil revenues andare presented separately from transportation expenses, are reported on a gross basis, as the Company controls the operated production prior to its transfer to customers. Transportation expenses associated with the Company's operated crude oil production totaled $159.0 million, $192.0 million, and $162.3 million for the yearyears ended December 31, 2018.2020, 2019, and 2018, respectively.
Operated natural gas revenues – The Company sells the majority of its operated natural gas production to midstream customers at its lease locations based on market prices in the field where the sales occur. Under these arrangements, the midstream customers obtain control of the unprocessed gas stream at the lease location and the Company's revenues from each sale are determined using contractually agreed pricing formulas which contain multiple components, including the volume and Btu content of the natural gas sold, the midstream customer's proceeds from the sale of residue gas and natural gas liquids ("NGLs") at secondary downstream markets, and contractual pricing adjustments reflecting the midstream customer's estimated recoupment of its investment over time. Such revenues are recognized net of pricing adjustments applied by the midstream customer during the month in which control transfers to the customer at the delivery point and it is probable the Company will collect the consideration it is entitled to receive. Natural gas sales proceeds from operated properties are generally received by the Company within one month after the month in which a sale has occurred.

Under certain arrangements, in periods of significantly depressed prices for natural gas and NGLs the contractual pricing adjustments applied by the midstream customer in a particular month may exceed the consideration to be received by the Company under the arrangement, resulting in a net payment owed by the Company to the midstream customer. In these
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situations, the net amounts paid or payable by the Company are reflected as a reduction of natural gas sales in the caption "Crude oil and natural gas sales" in the consolidated statements of comprehensive income (loss). Such payments, which are referred to herein as negative gas revenues, totaled $25.6 million for operated properties for the year ended December 31, 2020.
Under certain arrangements, the Company has the right to take a volume of processed residue gas and/or NGLs in-kind at the tailgate of the midstream customer's processing plant in lieu of a monetary settlement for the sale of the Company's operated natural gas production. The Company currently takes certain processed residue gas volumes in kind in lieu of monetary settlement, but does not currently take NGL volumes. When the Company elects to take volumes in kind, it pays third parties to transport the processed products it took in-kind to downstream delivery points, where it then sells to customers at prices applicable to those downstream markets. In such situations, operated revenues are recognized during the month in which control transfers to the customer at the delivery point and it is probable the Company will collect the consideration it is entitled to receive. Operated sales proceeds are generally received by the Company within one month after the month in which a sale has occurred. In these scenarios, the Company's revenues include the pricing adjustments applied by the midstream processing entity according to the applicable contractual pricing formula, but exclude the transportation expenses the Company incurs to transport the processed products to downstream customers. Transportation expenses associated with these arrangements totaled $37.7 million, $33.7 million, and $29.3 million for the yearyears ended December 31, 2020, 2019, and 2018, comprised entirely of costs to transport processed residue gas.respectively.
Non-operated crude oil and natural gas revenues – The Company's proportionate share of production from non-operated properties is generally marketed at the discretion of the operators. For non-operated properties, the Company receives a net payment from the operator representing its proportionate share of sales proceeds which is net of costs incurred by the operator, if any. Such non-operated revenues are recognized at the net amount of proceeds to be received by the Company during the month in which production occurs and it is probable the Company will collect the consideration it is entitled to receive. Proceeds are generally received by the Company within two to three months after the month in which production occurs.
In periods of significantly depressed prices for natural gas and NGLs the costs incurred by the outside operator in a particular month may exceed the consideration to be received by the Company, resulting in a net payment owed by the Company to the outside operator. In these situations, the net amounts paid or payable by the Company are reflected as a reduction of natural gas sales in the caption "Crude oil and natural gas sales" in the consolidated statements of comprehensive income (loss). Such negative gas revenues associated with non-operated properties totaled $17.3 million for the year ended December 31, 2020.
Revenues from derivative instruments – See Note 5. Derivative Instruments for discussion of the Company's accounting for its derivative instruments.
Revenues from service operations – Revenues from the Company's crude oil and natural gas service operations consist primarily of revenues associated with water gathering, recycling, and disposal activities and the treatment and sale of crude oil reclaimed from waste products. Revenues associated with such activities, which are derived using market-based rates or rates commensurate with industry guidelines, are recognized during the month in which services are performed, the Company has an unconditional right to receive payment, and collectability is probable. Payment is generally received by the Company within one month after the month in which services are provided.
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Disaggregation of crude oil and natural gas revenues
The following table presents the disaggregation of the Company's crude oil and natural gas revenues for the periods presented.
Year ended December 31,
202020192018
In thousandsNorth RegionSouth RegionTotalNorth RegionSouth RegionTotalNorth RegionSouth RegionTotal
Crude oil revenues:
Operated properties$1,264,149 $537,961 $1,802,110 $2,365,574 $786,652 $3,152,226 $2,330,711 $603,070 $2,933,781 
Non-operated properties362,952 34,914 397,866 727,068 50,700 777,768 790,435 68,378 858,813 
Total crude oil revenues1,627,101 572,875 2,199,976 3,092,642 837,352 3,929,994 3,121,146 671,448 3,792,594 
Natural gas revenues:
Operated properties (1)28,086 301,486 329,572 109,668 411,464 521,132 214,741 547,247 761,988 
Non-operated properties (2)720 25,166 25,886 25,188 38,075 63,263 60,738 63,402 124,140 
Total natural gas revenues28,806 326,652 355,458 134,856 449,539 584,395 275,479 610,649 886,128 
Crude oil and natural gas sales$1,655,907 $899,527 $2,555,434 $3,227,498 $1,286,891 $4,514,389 $3,396,625 $1,282,097 $4,678,722 
Timing of revenue recognition
Goods transferred at a point in time$1,655,907 $899,527 $2,555,434 $3,227,498 $1,286,891 $4,514,389 $3,396,625 $1,282,097 $4,678,722 
Goods transferred over time
$1,655,907 $899,527 $2,555,434 $3,227,498 $1,286,891 $4,514,389 $3,396,625 $1,282,097 $4,678,722 
(1) Operated natural gas revenues for the North region include negative gas revenues totaling $25.6 million for the year ended December 31, 2018.2020.
(2) Non-operated natural gas revenues for the North region include negative gas revenues totaling $17.3 million for the year ended December 31, 2020.
  Year ended December 31, 2018 
In thousands North Region South Region Total 
Crude oil revenues:       
Operated properties $2,330,711
 $603,070
 $2,933,781
 
Non-operated properties 790,435
 68,378
 858,813
 
Total crude oil revenues 3,121,146
 671,448
 3,792,594
 
Natural gas revenues:       
Operated properties 214,741
 547,247
 761,988
 
Non-operated properties 60,738
 63,402
 124,140
 
Total natural gas revenues 275,479
 610,649
 886,128
 
Crude oil and natural gas sales $3,396,625
 $1,282,097
 $4,678,722
 
        
Timing of revenue recognition       
Goods transferred at a point in time $3,396,625
 $1,282,097
 $4,678,722
 
Goods transferred over time 
 
 
 
  $3,396,625
 $1,282,097
 $4,678,722
 

Performance obligations
The Company satisfies the performance obligations under its crude oil and natural gas sales contracts upon delivery of its production and related transfer of control to customers. Judgment may be required in determining the point in time when control transfers to customers. Upon delivery of production, the Company has a right to receive consideration from its customers in amounts determined by the sales contracts.

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All of the Company's outstanding crude oil sales contracts at December 31, 20182020 are short-term in nature with contract terms of less than one year. For such contracts, the Company has utilized the practical expedient in Accounting Standards Codification ("ASC") 606-10-50-14 exempting the Company from disclosure of the transaction price allocated to remaining performance obligations, if any, if the performance obligation is part of a contract that has an original expected duration of one year or less.
The majority of the Company's operated natural gas production is sold at lease locations to midstream customers under multi-year term contracts. For such contracts having a term greater than one year, the Company has utilized the practical expedient in ASC 606-10-50-14A which indicates an entity is not required to disclose the transaction price allocated to remaining performance obligations, if any, if variable consideration is allocated entirely to a wholly unsatisfied performance obligation. Under ourthe Company’s sales contracts, whether for crude oil or natural gas, each unit of production delivered to a customer represents a separate performance obligation; therefore, future volumes to be delivered are wholly unsatisfied at period-end and disclosure of the transaction price allocated to remaining performance obligations is not applicable.
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Contract balances
Under the Company’s crude oil and natural gas sales contracts or activities that give rise to service revenues, the Company recognizes revenue after its performance obligations have been satisfied, at which point the Company has an unconditional right to receive payment. Accordingly, the Company’s commodity sales contracts and service activities generally do not give rise to contract assets or contract liabilities under ASC Topic 606. Instead, the Company's unconditional rights to receive consideration are presented as a receivable within "ReceivablesCrude oil and natural gas sales" or "ReceivablesJoint interest and other, net"," as applicable, in its consolidated balance sheets.
Revenues from previously satisfied performance obligations
To record revenues for commodity sales, at the end of each month the Company estimates the amount of production delivered and sold to customers and the prices to be received for such sales. Differences between estimated revenues and actual amounts received for all prior months are recorded in the month payment is received from the customer and are reflected in the financial statements within the caption "Crude oil and natural gas sales". Revenues recognized during the yearyears ended December 31, 2020, 2019, and 2018 related to performance obligations satisfied in prior reporting periods were not material.
Note 9. Income TaxesAllowance for Credit Losses
In June 2016, the FASB issued ASU 2016-13, Financial InstrumentsCredit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This standard changes how entities measure credit losses for most financial assets and certain other instruments that are not measured at fair value through net income. The standard replaced the previously required incurred loss approach with a forward-looking expected credit loss model for accounts receivable and other financial instruments measured at amortized cost. The standard became effective for reporting periods beginning after December 2017,15, 2019. The Company adopted the Tax Cuts and Jobs Act was signed into law. The legislation contained several key changesnew standard on January 1, 2020 using a modified retrospective approach through a cumulative-effect adjustment to U.S. corporate tax laws, including a reductionretained earnings as of the corporate income tax rate from 35% to 21%, effective January 1, 2018.date. The legislation also included a variety of other changes such as the repeal of the alternative minimum tax; the introduction of new limitations on the tax deductibility of net operating losses, interest expenses, and executive compensation expenses; the acceleration of expensing of certain qualified property; and the introduction of new laws governing taxation of foreign earnings of U.S. entities, among others.
The Company recognizes theCompany's cumulative effect of tax law changes in the reporting period that includes the enactment date in accordance with U.S. GAAP. As a result, the Company remeasured its deferred tax assets and liabilities as of December 31, 2017 to reflect the reduction in the corporate tax rate from 35% to 21% enacted into law in December 2017. This remeasurementadjustment resulted in a $713.7$0.1 million decrease in net deferred income tax liabilitiesretained earnings and corresponding decrease in income tax expensereceivables via the recognition of an incremental allowance for credit losses at January 1, 2020.
The Company's principal exposure to credit risk is through the sale of its crude oil and natural gas production and its receivables associated with billings to joint interest owners. Accordingly, the Company classifies its receivables into two portfolio segments as ofdepicted on the consolidated balance sheets as "ReceivablesCrude oil and natural gas sales” and "ReceivablesJoint interest and other.” Presented below are applicable disclosures required by ASU 2016-13 for each portfolio segment.

Historically, the Company's credit losses on receivables have been immaterial. The Company’s aggregate allowance for credit losses totaled $2.5 million and $2.4 million at December 31, 2020 and 2019, respectively, which is reported as "Allowance for credit losses" in the consolidated balance sheets. Aggregate credit loss expenses totaled $1.8 million, $1.6 million, and $0.5 millionfor the yearyears ended December 31, 2017,2020, 2019, and 2018, respectively, which is reflectedare included in “General and administrative expenses” in the tables below. consolidated statements of comprehensive income (loss).
Receivables—Crude oil and natural gas sales
The Company's accountingcrude oil and natural gas production from operated properties is generally sold to energy marketing companies, crude oil refining companies, and natural gas gathering and processing companies. The Company monitors its credit loss exposure to these counterparties primarily by reviewing credit ratings, financial statements, and payment history. Credit terms are extended based on an evaluation of each counterparty’s credit worthiness. The Company has not generally required its counterparties to provide collateral to secure its crude oil and natural gas sales receivables.
Receivables associated with crude oil and natural gas sales are short term in nature. Receivables from the sale of crude oil and natural gas from operated properties are generally collected within one month after the month in which a sale has occurred, while receivables associated with non-operated properties are generally collected within two to three months after the month in which production occurs.
The Company’s allowance for the effects of the tax rate changecredit losses on its deferred tax balances as well as other relevant aspects of the Tax Cutscrude oil and Jobs Actnatural gas sales was completed as ofnegligible at both December 31, 20172020 and December 31, 2019. The allowance was determined by considering a number of factors, primarily including the Company’s history of credit losses with adjustment as needed to reflect current conditions, the length of time accounts are past due, whether amounts relate to operated properties or non-operated properties, and the counterparty's ability to pay. There were no provisional amounts were recorded at that date that were later adjusted in 2018.

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write-offs, recoveries, or changes in the provision for credit losses on this portfolio segment during the year ended December 31, 2020.
Receivables—Joint interest and other
Joint interest and other receivables primarily arise from billing the individuals and entities who own a partial interest in the wells we operate. Joint interest receivables are due within 30 days and are considered delinquent after 60 days. In order to minimize our exposure to credit risk with these counterparties we generally request prepayment of drilling costs where it is allowed by contract or state law. Such prepayments are used to offset future capital costs when billed, thereby reducing the Company's credit risk. We may have the right to place a lien on a co-owner's interest in the well, to net production proceeds against amounts owed in order to secure payment or, if necessary, foreclose on the co-owner's interest.
The Company’s allowance for credit losses on joint interest receivables totaled $2.5 million and $2.4 million at December 31, 2020 and 2019, respectively. The allowance was determined by considering a number of factors, primarily including the Company’s history of credit losses with adjustment as needed to reflect current conditions, the length of time accounts are past due, the ability to recoup amounts owed through netting of production proceeds, the balance of co-owner prepayments if any, and the co-owner's ability to pay. There were no significant write-offs, recoveries, or changes in the provision for credit losses on this portfolio segment during the year ended December 31, 2020.
Note 10. Income Taxes
The items comprising the Company's (provision) benefitprovision (benefit) for income taxes are as follows for the periods presented:
  Year ended December 31,
In thousands 2018 2017 2016
Current income tax (provision) benefit:      
United States federal (1) $7,781
 $7,781
 $22,941
Various states (5) 
 (2)
Total current income tax benefit 7,776
 7,781
 22,939
Deferred income tax (provision) benefit:      
United States federal - taxation on operations (282,947) (81,054) 182,422
United States federal - effect of US tax reform 
 713,655
 
Various states (31,931) (7,002) 27,414
Total deferred income tax (provision) benefit (314,878) 625,599
 209,836
(Provision) benefit for income taxes $(307,102) $633,380
 $232,775
 Year ended December 31,
In thousands202020192018
Current income tax provision (benefit):
United States federal (1)$(2,248)$$(7,781)
Various states29 
Total current income tax provision (benefit)(2,219)(7,776)
Deferred income tax provision (benefit):
United States federal(148,828)191,328 282,947 
Various states(18,143)21,361 31,931 
Total deferred income tax provision (benefit)(166,971)212,689 314,878 
Provision (benefit) for income taxes$(169,190)$212,689 $307,102 
Effective tax rate21.8 %21.5 %23.7 %
(1) The current federal income tax benefits represent alternative minimum tax refunds.
The (provision) benefit for income taxesCompany's effective tax rate differs from the amount computed by applying the United States statutory federal incomestatutory tax rate due to the effect of state income (loss) before income taxes. The sourcestaxes, equity compensation, valuation allowances, and other tax effects ofitems as reflected in the difference are as follows:table below.
 Year ended December 31,
In thousands, except tax rates202020192018
Income (loss) before income taxes$(774,751)$987,162 $1,296,802 
U.S. federal statutory tax rate21.0 %21.0 %21.0 %
Expected income tax provision (benefit) based on U.S. federal statutory tax rate(162,698)207,304 272,328 
Items impacting the effective tax rate:
State and local income taxes, net of federal benefit(24,808)31,967 45,920 
Tax (benefit) deficiency from stock-based compensation4,927 (7,971)(259)
Sale of Canadian subsidiary and assets(16,860)
Other, net(1,085)(1,751)(10,887)
Valuation allowance14,474 
Provision (benefit) for income taxes$(169,190)$212,689 $307,102 
Effective tax rate21.8 %21.5 %23.7 %
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  Year ended December 31,
  2018 2017 2016
In thousands, except rates Amount Rate Amount Rate Amount Rate
             
Expected income tax (provision) benefit based on US statutory tax rate $(272,328) 21.0% $(54,623) 35.0% $221,359
 35.0%
State income taxes, net of federal benefit (45,920) 3.6% (4,682) 3.0% 18,829
 3.0%
Effect of US tax reform legislation 
 % 713,655
 (457.3%) 
 %
Tax (benefit) deficiency from stock-based compensation 259
 % (3,932) 2.5% 
 %
Non-deductible compensation (2,932) 0.2% (13,813) 8.9% (3,471) (0.5%)
Other, net 13,819
 (1.1%) (3,225) 2.1% (3,942) (0.7%)
(Provision) benefit for income taxes $(307,102) 23.7% $633,380
 (405.8%) $232,775
 36.8%



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Notes to Consolidated Financial Statements



In 2020, the Company determined it was more likely than not that a portion of its Oklahoma net operating loss ("NOL") carryforward would not be utilized prior to expiration, and a valuation allowance of $14.5 million was established during the year for the deferred tax asset associated with such NOL carryforward. The Company will continue to evaluate both the positive and negative evidence on a quarterly basis in determining the need for additional valuation allowances with respect to its deferred tax assets. Changes in positive and negative evidence, including differences between estimated and actual results, could result in changes in the valuation of our deferred tax assets that could have a material impact on our consolidated financial statements. Changes in existing tax laws could also affect actual tax results and the realization of deferred tax assets over time.
In 2019, the Company sold its Canadian subsidiary and associated properties. Prior to the sale, the Company had recognized cumulative valuation allowances totaling $19.6 million against deferred tax assets associated with operating loss carryforwards generated by the Canadian subsidiary for which the Company did not expect to realize a benefit. In conjunction with the sale, the deferred tax assets, deferred tax liabilities, and cumulative valuation allowance related to the Canadian subsidiary were removed, and an income tax benefit of $16.9 million was recorded related to the resulting capital loss on the sale of the stock.
The components of the Company’s deferred tax assets and deferred tax liabilities as of December 31, 20182020 and 20172019 are reflected in the table below.
 December 31,
In thousands20202019
Deferred tax assets
United States net operating loss carryforwards$579,781 $550,086 
Equity compensation12,900 13,157 
Other10,691 18,466 
Total deferred tax assets603,372 581,709 
Valuation allowance(14,474)
Total deferred tax assets, net of valuation allowance588,898 581,709 
Deferred tax liabilities
Property and equipment(2,204,378)(2,367,137)
Other(4,674)(1,697)
Total deferred tax liabilities(2,209,052)(2,368,834)
Deferred income tax liabilities, net$(1,620,154)$(1,787,125)
  December 31,
In thousands 2018 2017
Deferred tax assets    
United States net operating loss carryforwards $549,166
 $604,423
Canadian net operating loss carryforwards 19,633
 19,341
Alternative minimum tax carryforwards 
 7,781
Equity compensation 13,122
 12,962
Other 13,622
 21,885
Total deferred tax assets 595,543
 666,392
Canadian valuation allowance (19,633) (19,341)
Total deferred tax assets, net of valuation allowance 575,910
 647,051
Deferred tax liabilities    
Property and equipment (2,144,767) (1,903,451)
Other (5,579) (3,158)
Total deferred tax liabilities (2,150,346) (1,906,609)
Deferred income tax liabilities, net $(1,574,436) $(1,259,558)
As of December 31, 2018,2020, the Company had federal and state net operating loss carryforwards of $1.95$1.9 billion and $3.17$3.8 billion, respectively. The Company's federal net operating loss carryforward will begin expiringcarryforwards were generated in 2035.tax years prior to 2018 and expire between 2035 and 2037. The Company’s net operating loss carryforward in Oklahoma totaled $2.14$2.8 billion at December 31, 2018,2020, which will begin to expire in 2028. The Company’s net operating loss carryforward in North Dakota totaled $898$870 million at December 31, 2018,2020, which will begin to expire in 2035.Any available statutory depletion carryforwards will be recognized when realized. The Company files income tax returns in the U.S. federal U.S.and state and Canadian jurisdictions. With few exceptions, the Company is no longer subject to U.S. federal or state income tax examinations by tax authorities for years prior to 2015.2017.
Note 11. Leases
The Company recorded valuation allowances of $0.3 million, $0.4 million, and $1.0 million against Canadian deferred tax assets forCompany’s lease liabilities recognized on the years ended December 31, 2018, 2017, and 2016, respectively. The Company's cumulative valuation allowance was $19.6balance sheet as a lessee totaled $8.4 million as of December 31, 2018. Our Canadian subsidiary has generated2020 at discounted present value, which is comprised of the asset classes reflected in the table below. All leases recognized on the Company's balance sheet are classified as operating loss carryforwards for which weleases. The amounts disclosed herein primarily represent costs associated with properties operated by the Company that are presented on a gross basis and do not believe werepresent the Company's net proportionate share of such amounts. A portion of these costs have been or will realizebe billed to other working interest owners. Once paid, the Company's share of these costs are included in property and equipment, production expenses, or general and administrative expenses, as applicable.
The Company accounts for lease and non-lease components in its contracts as a benefit.single lease component for all asset classes. Additionally, the Company does not apply the recognition requirements of ASC Topic 842 to leases with durations of twelve months or less and uses hindsight in determining the lease term for all leases. The amountCompany's leasing activities as a lessor are negligible.
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Notes to Consolidated Financial Statements

In thousandsAmount
Drilling rig commitments$2,025 
Surface use agreements4,928 
Field equipment928 
Other546 
Total$8,427 
Drilling rig commitments reflected above represent minimum payment obligations expected to be incurred on enforceable commitments with durations in excess of one year at the inception of the lease.
Minimum future commitments by year for the Company's operating leases as of December 31, 2020 are presented in the table below. Such commitments are reflected at undiscounted values and are reconciled to the discounted present value recognized on the balance sheet.
In thousandsAmount
2021$2,911 
2022865 
2023811 
2024537 
2025429 
Thereafter6,230 
Total operating lease liabilities, at undiscounted value$11,783 
Less: Imputed interest(3,356)
Total operating lease liabilities, at discounted present value$8,427 
Less: Current portion of operating lease liabilities(2,588)
Operating lease liabilities, net of current portion$5,839 
Additional information for the Company's operating leases is presented below. Lease costs primarily represent costs incurred for drilling rigs, most of which are short term contracts that are not recognized as right-of-use assets considered realizable could change if our subsidiary generates taxable income.and lease liabilities on the balance sheet. Variable lease costs primarily represent differences between minimum payment obligations and actual operating day-rate charges incurred by the Company for its long term drilling rig contracts. Short-term lease costs primarily represent operating day-rate charges for drilling rig contracts with durations of one year or less and month-to-month field equipment rentals.A portion of such lease costs are borne by other interest owners.
Year ended December 31,
In thousands, except weighted average data20202019
Lease costs:
Operating lease costs$6,444 $11,130 
Variable lease costs4,956 11,930 
Short-term lease costs107,984 176,586 
Total lease costs$119,384 $199,646 
Other information:
Right-of-use assets obtained in exchange for new operating lease liabilities$7,377 $1,208 
Operating cash flows from operating leases included in lease liabilities890 804 
Weighted average remaining lease term as of December 31 (in years)13.211.5
Weighted average discount rate as of December 314.8 %4.9 %
Note 10. Lease Commitments
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Prior to the January 1, 2019 adoption of ASU 2016-02, the Company’s operating lease obligations, as defined and accounted for under legacy U.S. GAAP in effect as of December 31, 2018, primarily representrepresented leases for surface use agreements, office buildings and equipment, communication towers, and field equipment. Lease payments associated with legacy operating leases for the yearsyear ended December 31, 2018 2017, and 2016 weretotaled $2.0 million, $1.9 million, and $4.4 million, respectively, a portion of which was capitalized and/or billed to other interest owners. At December 31, 2018, the minimum future rental commitments under legacy operating leases having enforceable lease terms in excess of one year are reflected in the table below. Such commitments are reflected at undiscounted values and arewere not recognized on the Company's balance sheet at December 31, 2018.
In thousands Total amount
2019 $1,535
2020 1,042
2021 833
2022 805
2023 745
Thereafter 6,795
Total obligations $11,755

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New lease accounting rules (ASU 2016-02) were adopted by the Company on January 1, 2019 that require enforceable long-term commitments under certain contracts which contain leases, as defined in ASU 2016-02,required to be recognized on the Company's balance sheet at discounted present value. See Note 1. Organization and Summaryunder legacy U.S. GAAP in effect as of Significant Accounting Policies–New accounting pronouncements not yet adopted at December 31, 2018–Leases for further discussion.2018.

In thousandsTotal amount as of December 31, 2018
2019$1,535 
20201,042 
2021833 
2022805 
2023745 
Thereafter6,795 
Total obligations as of December 31, 2018$11,755 
Note 11.12. Commitments and Contingencies
Included below is a discussion of variouscertain future commitments of the Company as of December 31, 2018. The2020.
Drilling rig commitments under these arrangements are not recorded in the accompanying consolidated balance sheets at December 31, 2018.
Drilling commitments As of December 31, 2018,2020, the Company has drilling rig contracts with various terms extending to February 2020 to ensure rig availability in its key operating areas.May 2021. Future operating day-rate commitments as of December 31, 20182020 total approximately $107$14.1 million, all of which $106 million is expected towill be incurred in 2019 and $1 million in 2020.2021. A portion of these future costs will be borne by other interest owners. Such future commitments include minimum payment obligations to be incurred in 2019 and 2020 atwith a discounted present value totaling $13$2.0 million that qualify as leases and wereare required to be recognized on the Company'sCompany’s balance sheet on January 1, 2019 upon adoption of ASU 2016-02at December 31, 2020in accordance with ASC Topic 842 as discussed in Note 1. Organization11. Leases.
Other lease commitments – The Company has various other lease commitments primarily associated with surface use agreements and Summary of Significant Accounting Policies–New accounting pronouncements not yet adopted at December 31, 2018–field equipment. See Note 11. Leases. for additional information.
Transportation, gathering, and processing commitments – The Company has entered into transportation, gathering, and processing commitments to guarantee capacity on crude oil and natural gas pipelines and natural gas processing facilities. The commitments, which have varying terms extending as far as 2028,2031, require the Company to pay per-unit transportation, gathering, or processing charges regardless of the amount of capacity used. Future commitments remaining as of December 31, 20182020 under the arrangements amount to approximately $1.83$1.45 billion, of which $241$227 million is expected to be incurred in 2019, $273 million in 2020, $254 million in 2021, $249$256 million in 2022, $248$257 million in 2023, $221 million in 2024, $143 million in 2025, and $566$346 million thereafter. A portion of these future costs will be borne by other interest owners. The Company is not committed under the above contracts to deliver fixed and determinable quantities of crude oil or natural gas in the future. These commitments do not qualify as leases to beunder ASC Topic 842 and are not recognized on the Company’s balance sheet under ASU 2016-02 beginning January 1, 2019.sheet.
LitigationPending property acquisition In November 2010, On December 31, 2020, the Company executed a putative class action was fileddefinitive agreement to acquire undeveloped leasehold and producing properties in the District CourtPowder River Basin of Blaine County, Oklahoma by Billy J. StrackWyoming for $215 million of cash. Closing of the acquisition is scheduled to occur on or around March 4, 2021 and Daniela A. Renner as trusteesremains subject to the completion of certain named trustscustomary due diligence procedures and on behalfclosing conditions. Upon execution of other similarly situated parties against the Company. The Petition, as amended, allegedagreement, the Company improperly deducted post-production costs from royalties paid to plaintiffs and other royalty interest owners from crude oil and natural gas wells located in Oklahoma. The plaintiffs alleged a numberan escrow deposit of claims, including breach of contract, fraud, breach of fiduciary duty, unjust enrichment, and other claims and sought recovery of compensatory damages, interest, punitive damages and attorney fees on behalf of the proposed class. The Company denied all allegations and denied that the case was properly brought as a class action. On June 11, 2015, the trial court certified a “hybrid” class requested by plaintiffs over the objections of the Company. The Company appealed the trial court’s class certification order. On February 8, 2017, the Oklahoma Court of Civil Appeals reversed the trial court’s ruling on certification and remanded the case for further proceedings. After certification of the case as a class action was reversed the parties engaged in settlement negotiations. Due to the uncertainty of and burdens of litigation, on February 16, 2018 the Company reached a settlement in connection with this matter. Under the settlement, the Company initially expected to make payments and incur costs associated with the settlement of approximately $59.6$21.5 million, and accrued a loss for such amount at December 31, 2017. On April 3, 2018, the District Court of Garfield County, Oklahoma preliminarily approved the settlement and set certain dates applicable to the settlement including the timing and content of Notice, Opt-out, and Objections to Class Members. On June 12, 2018, the court entered an order formally approving the settlement, which is not subject to appeal. Inreflected in the third quarter of 2018, the Company made payments totaling $45.8 million to satisfy the majority of its obligations under the settlement. The Company's remaining loss accrual for this matter totals $19.8 million at December 31, 2018, representing additional settlement obligations expected to be satisfied in 2019. The accrual for this matter is included in “Accrued liabilities and other”caption "Other noncurrent assets" on the consolidated balance sheets.sheet at December 31, 2020.
Litigation –The Company is involved in various other legal proceedings including, but not limited to, commercial disputes, claims from royalty and surface owners, property damage claims, personal injury claims, regulatory compliance matters, disputes with tax authorities and other matters. While the outcome of these legal matters cannot be predicted with certainty, the Company does not expect them to have a material effect on its financial condition, results of operations or cash flows. In addition to the accrued loss on the matter described above, asAs of December 31, 20182020 and 20172019, the Company had recordedrecognized a liability in the consolidated balance sheets under the captionwithin “Other noncurrent liabilities” of $4.7$7.7 million and $7.6$8.7 million, respectively, for various matters, none of which are believed to be individually significant.

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Environmental risk – Due to the nature of the crude oil and natural gas business, the Company is exposed to possible environmental risks. The Company is not aware of any material environmental issues or claims.
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Note 12.13. Related Party Transactions
Certain officers of the Company own or control entities that own working and royalty interests in wells operated by the Company. The Company paid revenues to these affiliates, including royalties, of $0.5$0.2 million, $0.5$0.4 million, and $0.4$0.5 million and received payments from these affiliates of $0.2$0.3 million, $0.3 million, and $0.3$0.2 million during the years ended December 31, 2018, 2017,2020, 2019, and 2016,2018, respectively, relating to the operations of the respective properties. At December 31, 20182020 and 2017,2019, approximately $67,000$18,000 and $58,000$127,000, respectively, was due from these affiliates respectively,relating to these transactions, which is included in “ReceivablesJoint interest and other” on the consolidated balance sheets. At December 31, 2020 and 2019, approximately $41,000$18,000 and $48,000$35,000, respectively, was due to these affiliates respectively, relating to these transactions.transactions, which is included in “Revenues and royalties payable” on the consolidated balance sheets.
The Company allows certain affiliates to use its corporate aircraft and crews and has used the aircraft of those same affiliates from time to time in order to facilitate efficient transportation of Company personnel. The rates charged between the parties vary by type of aircraft used. In 2016, the Company also purchased an existing prepaid maintenance account from an affiliate for use in major engine overhaul to be applied as needed for corporate aircrafts. For usage during 2018, 2017,2020, 2019, and 2016,2018, the Company charged affiliates approximately $12,900, $19,400,$8,100, $17,600, and $9,500,$12,900, respectively, for use of its corporate aircraft crews, fuel, and reimbursement of expenses and received approximately $14,400, $18,600,$9,500, $18,900, and $6,800$14,400 from affiliates in 2020, 2019, and 2018, 2017, and 2016, respectively.respectively, in connection with such items. The Company was charged approximately $598,000, $460,000,$120,000, $303,000, and $292,000,$598,000, respectively, by affiliates for use of their aircraft and reimbursement of expenses during 2018, 2017,2020, 2019, and 2016 (including the aforementioned prepayment)2018 and paid $529,000, $368,000,$158,000, $426,000, and $195,000$529,000 to the affiliates in 2018, 2017,2020, 2019, and 2016,2018, respectively. At December 31, 2018 and 2017,2019, approximately $2,700 and $4,200$1,400 was due from an affiliate respectively,relating to these transactions, which is included in “ReceivablesJoint interest and other” on the consolidated balance sheets. At December 31, 2019, approximately $161,000 and $92,000$38,000 was due to an affiliate respectively, relating to these transactions.
The Company capitalized costs of $0.1 milliontransactions, which is included in 2016 associated with drilling rig services and demobilization of a drilling rig provided by an affiliate. The total amount paid to“Accounts payable trade” on the affiliate, a portion of which was billed to other interest owners, was $0.1 million for the year ended December 31, 2016.consolidated balance sheets. No amounts were due to or from the affiliate at December 31, 2018 and 2017 related to the services.2020.
Note 13.14. Stock-Based Compensation
The Company has granted restricted stock to employees and directors pursuant to the Continental Resources, Inc. 2013 Long-Term Incentive Plan, as amended (“2013 Plan”) as discussed below.. The Company’s associated compensation expense, which is included in the caption “General and administrative expenses” in the consolidated statements of comprehensive income (loss), was $47.2$64.6 million, $45.9$52.0 million, and $48.1$47.2 million for the years ended December 31, 2018, 20172020, 2019, and 2016,2018, respectively.
In May 2013,March 2019, the Company adopted theamended and restated its 2013 Plan and reserved 19,680,072specified 12,983,543 shares of common stock that may be issued pursuant to the amended plan. Subject to limited exceptions, the 2013 Plan allows previously issued shares to be reissued if such shares are subsequently forfeited or withheld to satisfy tax withholdings. As of December 31, 2018,2020, the Company had 13,736,73410,768,301 shares of common stock available for long-term incentive awards to employees and directors under the 2013 Plan.
Restricted stock is awarded in the name of the recipient and constitutes issued and outstanding shares of the Company’s common stock for all corporate purposes during the period of restriction and, except as otherwise provided under the 2013 Plan or agreement relevant to a given award, includes the right to vote the restricted stock and to receive dividends, if any, subject to forfeiture. Restricted stock grants generally vest over periods ranging from one1 to three3 years.

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Notes to Consolidated Financial Statements



A summary of changes in non-vested restricted shares from December 31, 20152017 to December 31, 20182020 is presented below.
Number of
non-vested
shares
Weighted
average
grant-date
fair value
 Number of
non-vested
shares
 Weighted
average
grant-date
fair value
Non-vested restricted shares at December 31, 2015 3,249,611
 $48.20
Granted 2,064,508
 22.36
Vested (1,207,235) 41.27
Forfeited (193,250) 39.79
Non-vested restricted shares at December 31, 2016 3,913,634
 $37.12
Granted 1,585,870
 44.58
Vested (874,665) 57.36
Forfeited (598,729) 37.34
Non-vested restricted shares at December 31, 2017 4,026,110
 $35.63
Non-vested restricted shares at December 31, 20174,026,110 $35.63 
Granted 1,390,914
 52.71
Granted1,390,914 52.71 
Vested (1,116,329) 46.19
Vested(1,116,329)46.19 
Forfeited (278,286) 38.06
Forfeited(278,286)38.06 
Non-vested restricted shares at December 31, 2018 4,022,409
 $38.44
Non-vested restricted shares at December 31, 20184,022,409 $38.44 
GrantedGranted1,526,825 43.21 
VestedVested(1,737,304)24.19 
ForfeitedForfeited(350,022)47.13 
Non-vested restricted shares at December 31, 2019Non-vested restricted shares at December 31, 20193,461,908 $46.82 
GrantedGranted2,738,625 26.93 
VestedVested(1,146,618)45.78 
ForfeitedForfeited(163,277)36.69 
Non-vested restricted shares at December 31, 2020Non-vested restricted shares at December 31, 20204,890,638 $36.26 
The grant date fair value of restricted stock represents the closing market price of the Company’s common stock on the date of grant. Compensation expense for a restricted stock grant is determined at the grant date fair value and is recognized over the vesting period as services are rendered by employees and directors. The Company estimates the number of forfeitures expected to occur in determining the amount of stock-based compensation expense to recognize. There are no post-vesting restrictions related to the Company’s restricted stock. The fair value at the vesting date of restricted stock that vested during 2018, 20172020, 2019, and 20162018 was approximately $61.0$27.5 million, $39.8$79.7 million, and $30.0$61.0 million, respectively. As of December 31, 2018,2020, there was approximately $70$66 million of unrecognized compensation expense related to non-vested restricted stock. This expense is expected to be recognized over a weighted average period of 1.0 year.1.3 years.
Note 14. 15. Shareholders' Equity Attributable to Continental Resources
Share repurchases
In May 2019 the Company's Board of Directors approved the initiation of a share repurchase program to acquire up to $1 billion of the Company's common stock beginning in June 2019. As of December 31, 2019, the Company had repurchased and retired approximately 5.6 million shares at an aggregate cost of $190.2 million. During the three months ended March 31, 2020, the Company repurchased and retired approximately 8.2 million additional shares of its common stock at an aggregate cost of $126.9 million. No share repurchases have been made subsequent to March 31, 2020. Through December 31, 2020, the Company has repurchased and retired a cumulative total of approximately 13.8 million shares at an aggregate cost of $317.1 million since the inception of its $1 billion share repurchase program in June 2019.
The timing and amount of the Company's share repurchases are subject to market conditions and management discretion. The share repurchase program does not require the Company to repurchase a specific number of shares and may be modified, suspended, or terminated by the Board of Directors at any time. 
Dividend payment
In May 2019 the Company's Board of Directors approved the initiation of a dividend payment program and on June 3, 2019 the Company announced its first quarterly cash dividend of $0.05 per share on its outstanding common stock, which amounted to $18.4 million and was paid on November 21, 2019 to shareholders of record on November 7, 2019.
On January 27, 2020 the Company declared a quarterly cash dividend of $0.05 per share on its outstanding common stock, which amounted to $18.4 million and was paid on February 21, 2020 to shareholders of record as of February 7, 2020.
To preserve cash in response to the significant reduction in crude oil prices and economic uncertainty resulting from the COVID-19 pandemic, in April 2020 the Company’s quarterly dividend was suspended by the Board of Directors.
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Accumulated Other Comprehensive Income (Loss)other comprehensive income
Adjustments resulting from the process of translating foreign functional currency financial statements into U.S. dollars are included in “Accumulated other comprehensive income (loss)”income” within shareholders’ equity attributable to Continental Resources on the consolidated balance sheets and “Other comprehensive income (loss), net of tax” in the consolidated statements of comprehensive income (loss). The following table summarizes the change in accumulated other comprehensive income (loss) for the years ended December 31, 2018, 2017,2019, and 2016:2018:
Year ended December 31,
In thousands20192018
Beginning accumulated other comprehensive income, net of tax$415 $307 
Foreign currency translation adjustments140 108 
Release of cumulative translation adjustments (1)(555)
Income taxes (2)
Other comprehensive income (loss), net of tax(415)108 
Ending accumulated other comprehensive income, net of tax$$415 
(1)     In conjunction with the Company’s sale of its Canadian operations in 2019, the cumulative translation adjustments were released. See Note 17. Property Acquisitions and Dispositions for further information.
(2)     A valuation allowance had been recognized against all deferred tax assets associated with losses generated by the Company’s Canadian operations, thereby resulting in no income taxes on other comprehensive income.
  Year ended December 31,
In thousands 2018 2017 2016
Beginning accumulated other comprehensive income (loss), net of tax $307
 $(260) $(3,354)
Foreign currency translation adjustments 108
 567
 3,094
Income taxes (1) 
 
 
Other comprehensive income, net of tax 108
 567
 3,094
Ending accumulated other comprehensive income (loss), net of tax $415
 $307
 $(260)
(1)A valuation allowance has been recognized against all deferred tax assets associated with losses generated by the Company’s Canadian operations, thereby resulting in no income taxes on other comprehensive income.

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Note 15.16. Noncontrolling Interests
Strategic mineral relationship
In October 2018, Continental entered into a strategic relationship with Franco-Nevada Corporation to acquire oil and gas mineral interests in the SCOOP and STACK playswithin an area of mutual interest through a newly-formed minerals subsidiary named The Mineral Resources Company II, LLC ("(“TMRC II"II”). At closing in October 2018, Continental contributed most of its previously acquired mineral interests to TMRC II in exchange for a 50.1% ownership interest in the entity. Additionally, at closing Franco-Nevada paid $214.8 millionto Continental for a 49.9% ownership interest in TMRC II and for funding of its share of certain mineral acquisition costs.
In accordance with Under the transaction terms, the parties have committed, subject to satisfaction of agreed upon acreage development thresholds, to spend a remaining aggregate total of approximately $309 million through year-end 2021to acquire additional oil and gas mineral interests through TMRC II.arrangement, Continental is to fund 20% of future mineral acquisitions and will be entitled to receive between 25% and 50% of total revenues generated by TMRC II based upon performance relative to certain predetermined production targets.
Continental holds a controlling financial interest in TMRC II.II and manages its operations. Accordingly, Continental has consolidatedconsolidates the financial results of the entity and has presentedpresents the portion of TMRC II'sII’s results attributable to Franco-Nevada as a noncontrolling interest in its consolidated financial statements. Subsequent to closing,Periodically, Franco-Nevada made additionalmakes capital contributions to, and receivedreceives revenue distributions from, TMRC II in 2018 and the portion of Continental'sContinental’s consolidated net assets attributable to Franco-Nevada totaled $266.8$355.1 million and $356.9 million at December 31, 2018.2020 and 2019, respectively. In 2018, Continental incurred $4.8 million of costs associated with thisthe above transaction, which were recognized as a reduction of "Additional“Additional paid-in capital"capital” within shareholders’ equity attributable to Continental.
Joint ownership arrangement
In December 2018, Continental entered into an arrangement with a third party to jointly acquire parking facilities adjacent to the companies'companies’ corporate office buildings. The activities of the parking facilities, which are immaterial to Continental, are managed through a newly-formedan entity named SFPG, LLC.LLC (“SFPG”). Continental holds a 57.4% controlling financial interest in SFPG and accordingly, has consolidatedmanages its operations. Accordingly, Continental consolidates the financial results of the entity and has includedincludes the results attributable to the third party within noncontrolling interests in Continental'sContinental’s financial statements. The portion of Continental'sContinental’s consolidated net assets attributable to the third party's ownership interest in SFPG totaled $9.9$11.2 million and $9.8 million at December 31, 2018.2020 and 2019, respectively.
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Note 16.17. Property Acquisitions and Dispositions
2020
In October 2020, the Company acquired undeveloped leasehold and producing properties in the SCOOP play for $162.8 million. The acquisition included approximately 19,500 net acres and insignificant amounts of production and proved reserves.
2019
In November 2019, the Company sold its Canadian subsidiary and related operations for cash proceeds of $1.7 million and recognized a $1.0 million pre-tax gain on the sale. The Company designated the Canadian dollar as the functional currency for its Canadian operations and, with the sale of the Canadian subsidiary, $0.5 million of cumulative translation adjustments included in "Accumulated other comprehensive income" on the consolidated balance sheets were released and included in the determination of the gain on sale. The disposed subsidiary and properties represented an immaterial portion of the Company’s assets and operating results.
In July 2019, the Company sold certain water gathering, recycling, and disposal assets in the STACK play for proceeds of $85.3 million, with no gain or loss recognized. The sale represented an immaterial portion of the Company’s assets and operating results.
2018
During 2018, the Company sold non-strategic properties in various areas for cash proceeds totaling $54.5 million. The Company recognized pre-tax gains on the transactions totaling $16.7 million. The disposed properties represented an immaterial portion of the Company’s production and proved reserves.
2017
In October 2017, the Company sold non-core leasehold in the STACK play for cash proceeds totaling $63.5 million and recognized a $56.9 million pre-tax gain in 2017 associated with the transaction. The disposed properties represented an immaterial portion of the Company’s production and proved reserves.
In September 2017, the Company sold properties in the Arkoma Woodford area for cash proceeds of $65.3 million. The sale included approximately 26,000 net acres of leasehold and producing properties with production totaling approximately 1,700 barrels of oil equivalent per day. In connection with the transaction, the Company recognized a pre-tax loss of $3.5 million in 2017. The disposed properties represented an immaterial portion of the Company’s proved reserves.
In September 2017, the Company sold certain oil-loading facilities in Oklahoma for $7.2 million and recognized a $4.2 million pre-tax gain in 2017 associated with the transaction.
2016
In October 2016, the Company sold approximately 30,000 net acres of non-core leasehold in the SCOOP play for cash proceeds totaling $295.6 million. The leasehold included producing properties with production totaling approximately 700 barrels of oil equivalent per day. In connection with the transaction, the Company recognized a pre-tax gain of $201.0 million. The disposed properties represented an immaterial portion of the Company’s proved reserves.
In September 2016, the Company sold properties in North Dakota and Montana for cash proceeds totaling $214.8 million, with no gain or loss recognized. The sale included approximately 68,000 net acres of leasehold in North Dakota and approximately

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Notes to Consolidated Financial Statements


12,000 net acres of leasehold in Montana. The sale also included producing properties with production totaling approximately 2,700 barrels of oil equivalent per day. The disposed properties represented an immaterial portion of the Company’s proved reserves.
In April 2016, the Company sold approximately 132,000 net acres of undeveloped leasehold in Wyoming for cash proceeds totaling $110.0 million. In connection with the transaction, the Company recognized a pre-tax gain of $96.9 million. The disposed properties had no production or proved reserves.
Note 17.18. Crude Oil and Natural Gas Property Information
The tables reflected below represent consolidated figures for the Company and its subsidiaries. In 2014, the Company initiated exploratory drilling activitiesoperations in Canada. Through December 31, 2018, those drilling activitiesCanada which were sold in the fourth quarter of 2019. The Company's Canadian operations have not had a material impact on the Company’s totalhistorical capital expenditures, production, and revenues. Accordingly, the results of operations, costs incurred, and capitalized costs associated with the Canadian operations have not been shown separately from the consolidated figures in the tables below. Additionally, results attributable to noncontrolling interests are immaterialnot material relative to the Company's consolidated results and are not separately presented below.
The following table sets forth the Company’s consolidated results of operations from crude oil and natural gas producing activities for the years ended December 31, 2018, 20172020, 2019 and 2016.2018.
Year ended December 31,
In thousands202020192018
Crude oil and natural gas sales$2,555,434 $4,514,389 $4,678,722 
Production expenses(359,267)(444,649)(390,423)
Production taxes(192,718)(357,988)(353,140)
Transportation expenses(196,692)(225,649)(191,587)
Exploration expenses(17,732)(14,667)(7,642)
Depreciation, depletion, amortization and accretion(1,859,893)(1,997,854)(1,839,241)
Property impairments(277,941)(86,202)(125,210)
Income tax (provision) benefit (1)83,427 (323,025)(434,047)
Results from crude oil and natural gas producing activities$(265,382)$1,064,355 $1,337,432 
(1)    Income taxes reflect the application of a combined federal and state tax rate of 24.5% on pre-tax income/loss generated by our operations in the United States. Additionally, the 2019 period includes the $16.9 million income tax benefit recognized upon the Company's sale of its Canadian operations during that year.
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 Year ended December 31,
In thousands 2018 2017 2016
Crude oil and natural gas sales (1) $4,678,722
 $2,982,966
 $2,026,958
Production expenses (390,423) (324,214) (289,289)
Production taxes (353,140) (208,278) (142,388)
Transportation expenses (1) (191,587) 
 
Exploration expenses (7,642) (12,393) (16,972)
Depreciation, depletion, amortization and accretion (1,839,241) (1,652,180) (1,679,485)
Property impairments (125,210) (237,370) (237,292)
Income tax (provision) benefit (2) (434,047) 504,475
 126,794
Results from crude oil and natural gas producing activities $1,337,432
 $1,053,006
 $(211,674)
(1)
For 2018, crude oil and natural gas sales are presented gross of certain transportation expenses as a result of the Company's January 1, 2018 adoption of new revenue recognition and presentation rules as discussed in Note 8. Revenues. The new rules were prospectively applied beginning January 1, 2018 and prior period results have not been adjusted to conform to the current presentation.
(2)
Income taxes reflect the application of a combined federal and state tax rate of 24.5% for 2018 and 38% for both 2017 and 2016 on pre-tax income and losses generated by operations in the United States. Additionally, the 2017 period includes a $713.7 million income tax benefit recognized upon the Company’s remeasurement of its deferred income tax assets and liabilities in response to the enactment of the Tax Cuts and Jobs Act in December 2017. See Note 9. Income Taxes for further discussion.

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Costs incurred in crude oil and natural gas activities
Costs incurred, both capitalized and expensed, in connection with the Company’s consolidated crude oil and natural gas acquisition, exploration and development activities for the years ended December 31, 2018, 20172020, 2019 and 20162018 are presented below:
 Year ended December 31, Year ended December 31,
In thousands 2018 2017 2016In thousands202020192018
Property acquisition costs:      Property acquisition costs:
Proved $31,579
 $8,446
 $5,008
Proved$60,494 $51,558 $31,579 
Unproved 329,586
 220,875
 149,962
Unproved201,919 312,680 329,586 
Total property acquisition costs 361,165
 229,321
 154,970
Total property acquisition costs262,413 364,238 361,165 
Exploration Costs 81,015
 123,461
 182,355
Exploration Costs48,282 50,143 81,015 
Development Costs 2,478,327
 1,695,954
 767,148
Development Costs1,053,532 2,388,582 2,478,327 
Total $2,920,507
 $2,048,736
 $1,104,473
Total$1,364,227 $2,802,963 $2,920,507 
Costs incurred above include asset retirement costs and revisions thereto of $25.8$18.1 million, $15.3$6.7 million and ($9.6)$25.8 million for the years ended December 31, 2018, 20172020, 2019 and 2016,2018, respectively.
Aggregate capitalized costs
Aggregate capitalized costs relating to the Company’s consolidated crude oil and natural gas producing activities and related accumulated depreciation, depletion and amortization as of December 31, 20182020 and 20172019 are as follows:
 December 31, December 31,
In thousands 2018 2017In thousands20202019
Proved crude oil and natural gas properties $24,060,625
 $21,362,199
Proved crude oil and natural gas properties$27,726,954 $26,611,429 
Unproved crude oil and natural gas properties 291,564
 365,413
Unproved crude oil and natural gas properties368,256 319,592 
Total 24,352,189
 21,727,612
Total28,095,210 26,931,021 
Less accumulated depreciation, depletion and amortization (10,680,870) (8,971,935)Less accumulated depreciation, depletion and amortization(14,622,376)(12,635,247)
Net capitalized costs $13,671,319
 $12,755,677
Net capitalized costs$13,472,834 $14,295,774 
Under the successful efforts method of accounting, the costs of drilling an exploratory well are capitalized pending determination of whether proved reserves can be attributed to the discovery. When initial drilling and completion operations are complete, management attempts to determine whether the well has discovered crude oil and natural gas reserves and, if so, whether those reserves can be classified as proved reserves. Often, the determination of whether proved reserves can be recorded under SEC guidelines cannot be made when drilling is completed. In those situations where management believes that economically producible hydrocarbons have not been discovered, the exploratory drilling costs are reflected on the consolidated statements of comprehensive income (loss) as dry hole costs, a component of “Exploration expenses”.expenses.” Where sufficient hydrocarbons have been discovered to justify further exploration or appraisal activities, exploratory drilling costs are deferred under the caption “Net property and equipment” on the consolidated balance sheets pending the outcome of those activities.
On at least a quarterly basis, operating and financial management review the status of all deferred exploratory drilling costs in light of ongoing exploration activities—in particular, whether the Company is making sufficient progress in its ongoing exploration and appraisal efforts. If management determines that future appraisal drilling or development activities are not likely to occur, any associated exploratory well costs are expensed in that period of determination.

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The following table presents the amount of capitalized exploratory well costs pending evaluation at December 31 for each of the last three years and changes in those amounts during the years then ended:
 Year ended December 31, Year ended December 31,
In thousands 2018 2017 2016In thousands202020192018
Balance at January 1 $31,356
 $34,852
 $59,397
Balance at January 1$6,257 $3,959 $31,356 
Additions to capitalized exploratory well costs pending determination of proved reserves 45,088
 79,451
 123,980
Additions to capitalized exploratory well costs pending determination of proved reserves32,880 28,280 45,088 
Reclassification to proved crude oil and natural gas properties based on the determination of proved reserves (72,347) (81,035) (141,941)Reclassification to proved crude oil and natural gas properties based on the determination of proved reserves(72)(23,200)(72,347)
Capitalized exploratory well costs charged to expense (138) (1,912) (6,584)Capitalized exploratory well costs charged to expense(6,328)(2,782)(138)
Balance at December 31 $3,959
 $31,356
 $34,852
Balance at December 31$32,737 $6,257 $3,959 
Number of gross wells 16
 37
 54
Number of gross wells16 11 16 
As of December 31, 2018,2020, the Company had no significant exploratory well costs that were suspended one year beyond the completion of drilling.
Note 18.19. Supplemental Crude Oil and Natural Gas Information (Unaudited)
The table below shows estimates of proved reserves prepared by the Company’s internal technical staff and independent external reserve engineers in accordance with SEC definitions. Ryder Scott Company, L.P. prepared reserve estimates for properties comprising approximately 98%95%, 96%91%, and 99%98% of the Company's total proved reserves as of December 31, 2018, 2017,2020, 2019, and 2016,2018, respectively. Remaining reserve estimates were prepared by the Company’s internal technical staff. All proved reserves stated herein are located in the United States. No proved reserves have been included for the Company’s Canadian operations as of December 31, 2018, 2017, and 2016.for the periods presented. Proved reserves attributable to noncontrolling interests are immaterialnot material relative to the Company's consolidated reserves and are not separately presented in the tables below.
Proved reserves are estimated quantities of crude oil and natural gas which geological and engineering data demonstrate with reasonable certainty to be economically producible in future periods from known reservoirs under existing economic conditions, operating methods, and government regulations prior to the time at which contracts providing the right to operate expire, unless evidence indicates renewal is reasonably certain. There are numerous uncertainties inherent in estimating quantities of proved crude oil and natural gas reserves. Crude oil and natural gas reserve engineering is a subjective process of estimating underground accumulations of crude oil and natural gas that cannot be precisely measured, and estimates of engineers other than the Company’s might differ materially from the estimates set forth herein. The accuracy of any reserve estimate is a function of the quality of available data and of engineering and geological interpretation and judgment. Periodic revisions or removals of estimated reserves and future cash flows may be necessary as a result of a number of factors, including reservoir performance, new drilling, crude oil and natural gas prices, changes in costs, technological advances, new geological or geophysical data, changes in business strategies, or other economic factors. Accordingly, reserve estimates may differ significantly from the quantities of crude oil and natural gas ultimately recovered.
Reserves at December 31, 2018, 20172020, 2019, and 20162018 were computed using the 12-month unweighted average of the first-day-of-the-month commodity prices as required by SEC rules.
Natural gas imbalance receivables and payables for each of the three years ended December 31, 2018, 20172020, 2019, and 20162018 were not material and have not been included in the reserve estimates.

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Proved crude oil and natural gas reserves
Changes in proved reserves were as follows for the periods presented:
Crude Oil
(MBbls)
Natural Gas
(MMcf)
Total
(MBoe)
Proved reserves as of December 31, 2017640,949 4,140,281 1,330,995 
Revisions of previous estimates(76,994)(1,153,555)(269,253)
Extensions, discoveries and other additions253,066 1,871,777 565,030 
Production(61,384)(284,730)(108,839)
Sales of minerals in place(2,154)(35,142)(8,011)
Purchases of minerals in place3,613 52,983 12,443 
Proved reserves as of December 31, 2018757,096 4,591,614 1,522,365 
Revisions of previous estimates(88,307)(363,239)(148,848)
Extensions, discoveries and other additions162,710 1,213,947 365,034 
Production(72,267)(311,865)(124,244)
Sales of minerals in place(803)(6,224)(1,840)
Purchases of minerals in place1,758 30,238 6,798 
Proved reserves as of December 31, 2019760,187 5,154,471 1,619,265 
Revisions of previous estimates(249,845)(1,530,174)(504,874)
Extensions, discoveries and other additions42,106 295,686 91,387 
Production(58,745)(306,528)(109,833)
Sales of minerals in place
Purchases of minerals in place3,272 27,269 7,817 
Proved reserves as of December 31, 2020496,975 3,640,724 1,103,762 
  Crude Oil
(MBbls)
 Natural Gas
(MMcf)
 Total
(MBoe)
Proved reserves as of December 31, 2015 700,514
 3,151,786
 1,225,811
Revisions of previous estimates (99,966) (63,057) (110,474)
Extensions, discoveries and other additions 97,587
 911,062
 249,430
Production (46,850) (195,240) (79,390)
Sales of minerals in place (8,057) (14,733) (10,513)
Purchases of minerals in place 
 
 
Proved reserves as of December 31, 2016 643,228
 3,789,818
 1,274,864
Revisions of previous estimates (77,779) (25,390) (82,012)
Extensions, discoveries and other additions 129,895
 661,867
 240,206
Production (50,536) (228,159) (88,562)
Sales of minerals in place (4,365) (64,989) (15,197)
Purchases of minerals in place 506
 7,134
 1,696
Proved reserves as of December 31, 2017 640,949
 4,140,281
 1,330,995
Revisions of previous estimates (76,994) (1,153,555) (269,253)
Extensions, discoveries and other additions 253,066
 1,871,777
 565,030
Production (61,384) (284,730) (108,839)
Sales of minerals in place (2,154) (35,142) (8,011)
Purchases of minerals in place 3,613
 52,983
 12,443
Proved reserves as of December 31, 2018 757,096
 4,591,614
 1,522,365
Revisions of previous estimates. Revisions for 20182020 are comprised of (i) the removal of 7450 MMBo and 960345 Bcf (totaling 234107 MMBoe) of PUD reserves no longer scheduled to be drilled within five years of initial booking due to a reduction in the scope of our future drilling programs based on adverse market conditions, reduced demand, and lower prices caused by the COVID-19 pandemic and our resulting allocation of capital to areas providing the best opportunities to improve efficiencies, recoveries, and rates of return, (ii) downward revisions of 29 MMBo and 172 Bcf (totaling 58 MMBoe) from the removal of PUD reserves due to changes in economics, performance, and other factors, (iii) downward price revisions of 214 MMBo and 1,043 Bcf (totaling 388 MMBoe) due to a significant decrease in average crude oil and natural gas prices in 2020 compared to 2019 resulting from the economic turmoil caused by the COVID-19 pandemic and other factors, and (iv) net upward revisions of 43 MMBo and 31 Bcf (totaling 48 MMBoe) due to changes in ownership interests, operating costs, anticipated production, and other factors.
Revisions for 2019 are comprised of (i) the removal of 17 MMBo and 108 Bcf (totaling 35 MMBoe) of PUD reserves no longer scheduled to be drilled within five years of initial booking due to the continual refinement of the Company's drilling programs and reallocation of capital to areas providing the greatest opportunities to improve efficiencies, recoveries, and rates of return, (ii) downward revisions of 38 MMBo and 278 Bcf (totaling 85 MMBoe) from the removal of PUD reserves due to changes in economics, performance, and other factors, (iii) downward price revisions of 24 MMBo and 118 Bcf (totaling 43 MMBoe) due to a decrease in average crude oil and natural gas prices in 2019 compared to 2018, and (iv) net downward revisions for oil reserves of 9 MMBo and net upward revisions for natural gas reserves of 139 Bcf (netting to 14 MMBoe of upward revisions) due to changes in ownership interests, operating costs, anticipated production, and other factors.
Revisions for 2018 are comprised of (i) the removal of 74 MMBo and 960 Bcf (totaling 234 MMBoe) of PUD reserves no longer scheduled to be drilled within five years of initial booking due to changes in development plans, (ii) downward revisions of 21 MMBo and 216 Bcf (totaling 57 MMBoe) from the removal of PUD reserves due to changes in anticipated well densities and other factors, (iii) upward price revisions of 21 MMBo and 31 Bcf (totaling 26 MMBoe) due to an increase in average crude oil and natural gas prices in 2018 compared to 2017, and (iv) net downward revisions of 2 MMBo and 11 Bcf (totaling 4 MMBoe) due to changes in ownership interests, operating costs, anticipated production, performance, and other factors.
Revisions for 2017 are comprised of (i) the removal of 89 MMBoe of PUD reserves not scheduled to be drilled within five years of initial booking due to changes in development plans, (ii) upward price revisions of 42 MMBoe due to an increase in average crude oil and natural gas prices in 2017 compared to 2016, (iii) downward revisions of 30 MMBoe due to changes in anticipated production performance, and (iv) net downward revisions of 5 MMBoe due to changes in ownership interests, operating costs, and other factors.
Revisions for 2016 are comprised of (i) the removal of 70 MMBoe of PUD reserves not scheduled to be drilled within five years of initial booking due to changes in development plans, (ii) downward price revisions of 28 MMBoe due to a decrease in average crude oil and natural gas prices in 2016 compared to 2015, and (iii) net downward revisions of 12 MMBoe due to changes in ownership interests, operating costs, anticipated production performance, and other factors.
Extensions, discoveries and other additions.Extensions, discoveries and other additions for each of the three years reflected in the table above were due to successful drilling and completion activities and continual refinement of our drilling programs in the Bakken, SCOOP, and STACK plays. For 2018, proved reserve additions in the Bakken totaled 176 MMBo and 448 Bcf (totaling 251 MMBoe) and reserve additions in SCOOP totaled 64 MMBo and 733 Bcf (totaling 186 MMBoe). Additionally, 2018 proved reserve additions in STACK totaled 13 MMBo and 691 Bcf (totaling 128 MMBoe).
Sales of minerals in place. See Note 16. Property Dispositions for a discussion of notable dispositions in 2016, 2017, and 2018, none of which involved significant volumes of proved reserves.

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the Bakken, SCOOP, and STACK plays. For 2020, proved reserve additions in the Bakken totaled 30 MMBo and 69 Bcf (totaling 41 MMBoe) and reserve additions in SCOOP totaled 12 MMBo and 223 Bcf (totaling 49 MMBoe). Additionally, 2020 proved reserve additions in STACK totaled 4 Bcf (totaling 1 MMBoe).
Sales of minerals in place. There were no individually significant dispositions of proved reserves in the three years reflected in the table above.
Purchases of minerals in place. There were no individually significant acquisitions of proved reserves in the three years reflected in the table above. The increase in acquired reserves in 2018 compared to prior years was due to higher mineral acquisition spending.
The following reserve information sets forth the estimated quantities of proved developed and proved undeveloped crude oil and natural gas reserves of the Company as of December 31, 2018, 20172020, 2019 and 2016:2018:
 December 31, December 31,
 2018 2017 2016 202020192018
Proved Developed Reserves      Proved Developed Reserves
Crude oil (MBbl) 347,825
 318,707
 290,210
Crude oil (MBbl)281,906 336,405 347,825 
Natural Gas (MMcf) 1,964,289
 1,699,161
 1,370,620
Natural Gas (MMcf)2,073,011 2,226,117 1,964,289 
Total (MBoe) 675,206
 601,901
 518,646
Total (MBoe)627,407 707,424 675,206 
Proved Undeveloped Reserves      Proved Undeveloped Reserves
Crude oil (MBbl) 409,271
 322,242
 353,018
Crude oil (MBbl)215,069 423,782 409,271 
Natural Gas (MMcf) 2,627,325
 2,441,120
 2,419,198
Natural Gas (MMcf)1,567,713 2,928,354 2,627,325 
Total (MBoe) 847,159
 729,094
 756,218
Total (MBoe)476,355 911,841 847,159 
Total Proved Reserves      Total Proved Reserves
Crude oil (MBbl) 757,096
 640,949
 643,228
Crude oil (MBbl)496,975 760,187 757,096 
Natural Gas (MMcf) 4,591,614
 4,140,281
 3,789,818
Natural Gas (MMcf)3,640,724 5,154,471 4,591,614 
Total (MBoe) 1,522,365
 1,330,995
 1,274,864
Total (MBoe)1,103,762 1,619,265 1,522,365 
Proved developed reserves are reserves expected to be recovered through existing wells with existing equipment and operating methods. Proved undeveloped reserves are reserves expected to be recovered from new wells on undrilled acreage or from existing wells that require relatively major capital expenditures to recover, including most wells where drilling has occurred but the wells have not been completed. Natural gas is converted to barrels of crude oil equivalent using a conversion factor of six thousand cubic feet per barrel of crude oil based on the average equivalent energy content of natural gas compared to crude oil.
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Standardized measure of discounted future net cash flows relating to proved crude oil and natural gas reserves
The standardized measure of discounted future net cash flows presented in the following table was computed using the 12-month unweighted average of the first-day-of-the-month commodity prices, the costs in effect at December 31 of each year and a 10% discount factor. The Company cautions that actual future net cash flows may vary considerably from these estimates. Although the Company’s estimates of total proved reserves, development costs and production rates were based on the best available information, the development and production of the crude oil and natural gas reserves may not occur in the periods assumed. Actual prices realized, costs incurred and production quantities may vary significantly from those used. Therefore, the estimated future net cash flow computations should not be considered to represent the Company’s estimate of the expected revenues or the current value of existing proved reserves.
The following table sets forth the standardized measure of discounted future net cash flows attributable to proved crude oil and natural gas reserves as of December 31, 2018, 20172020, 2019, and 2016.2018. Discounted future net cash flows attributable to noncontrolling interests are immaterialnot material relative to the Company's consolidated amounts and are not separately presented below.
 December 31,
In thousands202020192018
Future cash inflows$21,334,235 $49,893,470 $61,510,432 
Future production costs(7,750,834)(15,309,672)(16,139,001)
Future development and abandonment costs(3,950,752)(10,033,887)(9,706,114)
Future income taxes (1)(724,569)(3,351,657)(6,012,439)
Future net cash flows8,908,080 21,198,254 29,652,878 
10% annual discount for estimated timing of cash flows(4,254,515)(10,736,613)(13,968,061)
Standardized measure of discounted future net cash flows$4,653,565 $10,461,641 $15,684,817 
  December 31,
In thousands 2018 2017 2016
Future cash inflows $61,510,432
 $42,574,897
 $31,008,587
Future production costs (16,139,001) (11,159,362) (9,175,410)
Future development and abandonment costs (9,706,114) (6,487,097) (6,452,647)
Future income taxes (1) (6,012,439) (3,488,755) (3,018,839)
Future net cash flows 29,652,878
 21,439,683
 12,361,691
10% annual discount for estimated timing of cash flows (13,968,061) (10,969,506) (6,851,468)
Standardized measure of discounted future net cash flows $15,684,817
 $10,470,177
 $5,510,223
(1)Estimated future income taxes were calculated by applying existing statutory tax rates, including any known future changes, to the estimated pre-tax net cash flows related to proved crude oil and natural gas reserves, giving effect to any permanent taxable differences and tax credits, less the tax basis of the properties involved. The U.S. federal statutory tax rate utilized in estimating future income taxes was 21% at December 31, 2020, 2019, and 2018.

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(1)Estimated future income taxes were calculated by applying existing statutory tax rates, including any known future changes, to the estimated pre-tax net cash flows related to proved crude oil and natural gas reserves, giving effect to any permanent taxable differences and tax credits, less the tax basis of the properties involved. The U.S. federal statutory tax rate utilized in estimating future income taxes was 21% at December 31, 2018 and 2017 and 35% at December 31, 2016.
The weighted average crude oil price (adjusted for location and quality differentials) utilized in the computation of future cash inflows was $61.20, $47.03,$34.34, $51.95, and $35.57$61.20 per barrel at December 31, 2018, 20172020, 2019, and 2016,2018, respectively. The weighted average natural gas price (adjusted for location and quality differentials) utilized in the computation of future cash inflows was $3.22, $3.00,$1.17, $2.02, and $2.14$3.22 per Mcf at December 31, 2018, 20172020, 2019, and 2016,2018, respectively. Future cash flows are reduced by estimated future costs to develop and produce the proved reserves, as well as certain abandonment costs, based on year-end cost estimates assuming continuation of existing economic conditions. The expected tax benefits to be realized from the utilization of net operating loss carryforwards and tax credits are used in the computation of future income tax cash flows.
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The changes in the aggregate standardized measure of discounted future net cash flows attributable to proved crude oil and natural gas reserves are presented below for each of the past three years.
 December 31,
 In thousands202020192018
Standardized measure of discounted future net cash flows at January 1$10,461,641 $15,684,817 $10,470,177 
Extensions, discoveries and improved recoveries, less related costs187,981 1,649,322 5,162,635 
Revisions of previous quantity estimates(2,952,489)(1,564,503)(3,522,428)
Changes in estimated future development and abandonment costs4,760,286 1,401,513 1,063,089 
Purchases (sales) of minerals in place, net53,742 49,330 (9,192)
Net change in prices and production costs(6,912,031)(6,591,347)4,224,473 
Accretion of discount1,183,993 1,865,034 1,183,347 
Sales of crude oil and natural gas produced, net of production costs(1,806,758)(3,486,103)(3,743,572)
Development costs incurred during the period863,101 1,557,121 1,134,153 
Change in timing of estimated future production and other(2,325,024)(1,690,779)1,324,365 
Change in income taxes1,139,123 1,587,236 (1,602,230)
Net change(5,808,076)(5,223,176)5,214,640 
Standardized measure of discounted future net cash flows at December 31$4,653,565 $10,461,641 $15,684,817 
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  December 31,
 In thousands 2018 2017 2016
Standardized measure of discounted future net cash flows at January 1 $10,470,177
 $5,510,223
 $6,476,284
Extensions, discoveries and improved recoveries, less related costs 5,162,635
 1,462,629
 786,587
Revisions of previous quantity estimates (3,522,428) (1,004,355) (794,785)
Changes in estimated future development and abandonment costs 1,063,089
 743,657
 1,651,218
Sales of minerals in place, net (9,192) (41,077) (90,390)
Net change in prices and production costs 4,224,473
 3,808,116
 (2,003,163)
Accretion of discount 1,183,347
 665,507
 798,597
Sales of crude oil and natural gas produced, net of production costs (3,743,572) (2,450,474) (1,595,281)
Development costs incurred during the period 1,134,153
 1,045,875
 454,983
Change in timing of estimated future production and other 1,324,365
 948,519
 (538,665)
Change in income taxes (1,602,230) (218,443) 364,838
Net change 5,214,640
 4,959,954
 (966,061)
Standardized measure of discounted future net cash flows at December 31 $15,684,817
 $10,470,177
 $5,510,223

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Note 19.20. Quarterly Financial Data (Unaudited)
The Company’s unaudited quarterly financial data for 20182020 and 20172019 is summarized below.
 Quarter ended
In thousands, except per share dataMarch 31June 30September 30December 31
2020
Total revenues (1)$880,801 $175,659 $692,370 $837,640 
Gain (loss) on derivative instruments, net (1)$$(7,782)$(17,853)$10,977 
Property impairments (2)$222,529 $23,929 $18,518 $12,965 
Loss from operations$(193,588)$(296,776)$(31,895)$(31,633)
Gain (loss) on extinguishment of debt (3)$17,631 $46,942 $$(28,854)
Net loss$(186,784)$(242,131)$(81,583)$(95,063)
Net loss attributable to Continental Resources$(185,664)$(239,286)$(79,422)$(92,497)
Net loss per share attributable to Continental Resources:
Basic$(0.51)$(0.66)$(0.22)$(0.26)
Diluted$(0.51)$(0.66)$(0.22)$(0.26)
2019
Total revenues (1)$1,124,234 $1,208,382 $1,104,197 $1,195,134 
Gain (loss) on derivative instruments, net (1)$(1,124)$53,448 $1,195 $(4,436)
Property impairments (2)$25,316 $21,339 $20,199 $19,348 
Income from operations$304,965 $379,847 $278,724 $293,876 
Gain (loss) on extinguishment of debt (3)$$$(4,584)$
Net income (4)$186,493 $236,450 $157,422 $194,108 
Net income attributable to Continental Resources (4)$186,976 $236,557 $158,162 $193,946 
Net income per share attributable to Continental Resources: (4)
Basic$0.50 $0.63 $0.43 $0.53 
Diluted$0.50 $0.63 $0.43 $0.53 
(1)Gains and losses on natural gas derivative instruments are reflected in “Total revenues” on both the consolidated statements of comprehensive income (loss) and this table of unaudited quarterly financial data. Commodity price fluctuations each quarter can result in significant swings in mark-to-market gains and losses, which affects comparability between periods.
(2)Property impairments have been shown separately to illustrate the impact on quarterly results attributable to write downs of the Company’s assets. Commodity price fluctuations each quarter can result in significant changes in estimated future cash flows and resulting impairments, which affects comparability between periods.
(3)See Note 7. Long-Term Debt for discussion of the gains and losses recognized by the Company upon the partial redemptions and repurchases of its senior notes in 2019 and 2020.
(4)In the fourth quarter of 2019, the Company sold its Canadian subsidiary and associated properties and a $16.9 million ($0.05 per basic and diluted share) decrease in income tax expense and corresponding increase in net income was recognized as discussed in Note 10. Income Taxes.
Note 21. Subsequent Event
Redemption of 2022 Notes
On January 5, 2021, the Company redeemed an additional $400 million principal amount of its outstanding 2022 Notes using proceeds from lower-rate borrowings on its credit facility. At January 31, 2021, the remaining outstanding principal amount of 2022 Notes totaled $230.8 million and outstanding credit facility borrowings totaled $360 million.
99
  Quarter ended
In thousands, except per share data March 31     June 30     September 30     December 31    
2018        
Total revenues (1) $1,141,028
 $1,137,113
 $1,282,151
 $1,149,294
Gain (loss) on natural gas derivatives, net (1) $10,174
 $(12,685) $(2,025) $(19,394)
Property impairments (2) $33,784
 $29,162
 $23,770
 $38,494
Gain on sale of assets, net (3) $41
 $6,710
 $1,510
 $8,410
Income from operations $380,722
 $391,276
 $491,308
 $330,414
Loss on extinguishment of debt (4) $
 $
 $(7,133) $
Net income $233,946
 $242,464
 $314,169
 $199,121
Net income attributable to Continental Resources $233,946
 $242,464
 $314,169
 $197,738
Net income per share attributable to Continental Resources:        
Basic $0.63
 $0.65
 $0.84
 $0.53
Diluted $0.63
 $0.65
 $0.84
 $0.53
2017        
Total revenues (1) $685,427
 $661,486
 $726,743
 $1,047,172
Gain on natural gas derivatives, net (1) $46,858
 $28,022
 $8,602
 $8,165
Property impairments (2) $51,372
 $123,316
 $35,130
 $27,552
Litigation settlement (5) $
 $
 $
 $59,600
Gain (loss) on sale of assets, net (3) $(3,638) $780
 $3,562
 $54,420
Income (loss) from operations $77,221
 $(29,041) $91,753
 $309,468
Net income (loss) (6) $469
 $(63,557) $10,621
 $841,914
Net income (loss) per share:        
Basic $
 $(0.17) $0.03
 $2.27
Diluted $
 $(0.17) $0.03
 $2.25
(1)Gains and losses on natural gas derivative instruments are reflected in “Total revenues” on both the consolidated statements of comprehensive income (loss) and this table of unaudited quarterly financial data. Natural gas derivative gains and losses have been shown separately to illustrate the fluctuations in revenues that are attributable to the Company’s derivative instruments. Commodity price fluctuations each quarter can result in significant swings in mark-to-market gains and losses, which affects comparability between periods. Additionally, beginning in 2018 certain transportation expenses are no longer netted within "Total revenues" as a result of the Company's January 1, 2018 prospective adoption of ASU 2016-08, which affects comparability of 2017 and 2018 revenues. Transportation expenses totaled $49.3 million, $47.3 million, $46.0 million, and $49.0 million for the first, second, third, and fourth quarters of 2018, respectively.
(2)Property impairments have been shown separately to illustrate the impact on quarterly results attributable to write downs of the Company’s assets. Commodity price fluctuations each quarter can result in significant changes in estimated future cash flows and resulting impairments, which affects comparability between periods.
(3)
Gains and losses on asset sales have been shown separately to illustrate the impact on quarterly results attributable to asset dispositions, which differ in significance from period to period and affect comparability. See Note 16. Property Dispositions for a discussion of notable dispositions.

(4)
See Note 7. Long-Term Debt for discussion of the loss recognized by the Company upon the partial redemption of its 2022 Notes in the 2018 third quarter.
(5)
Fourth quarter 2017 results include a $59.6 million pre-tax loss accrual recognized in conjunction with a litigation settlement as discussed in Note 11. Commitments and Contingencies—Litigation, which resulted in an after-tax decrease in net income of $37.0 million ($0.10 per basic and diluted share).
(6)
Fourth quarter 2017 results reflect the remeasurement of the Company's deferred income tax assets and liabilities in response to the enactment of the Tax Cuts and Jobs Act in December 2017, which resulted in a one-time decrease in income tax expense and corresponding increase in net income of approximately $713.7 million ($1.92 per basic share and $1.91 per diluted share). See Note 9. Income Taxes for further discussion.


Item 9.Changes in and Disagreements with Accountants on Accounting and Financial Disclosure
Item 9.    Changes in and Disagreements with Accountants on Accounting and Financial Disclosure
There have been no changes in accountants or any disagreements with accountants.


Item 9A.Controls and Procedures
Item 9A.    Controls and Procedures
Evaluation of Disclosure Controls and Procedures
As of the end of the period covered by this report, an evaluation of the effectiveness of the design and operation of the Company’s disclosure controls and procedures (as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”)) was performed under the supervision and with the participation of the Company’s management, including its Chief Executive Officer and Chief Financial Officer. Based on that evaluation, our Chief Executive Officer and Chief Financial Officer concluded the Company’s disclosure controls and procedures were effective as of December 31, 20182020 to ensure information required to be disclosed in the reports it files and submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and information required to be disclosed under the Exchange Act is accumulated and communicated to the Company’s management, including its Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure.


Changes in Internal Control over Financial Reporting
As of the end of the period covered by this report, we carried out an evaluation, under the supervision and with the participation of our Chief Executive Officer and Chief Financial Officer, of our internal control over financial reporting to determine whether any changes occurred during the fourth quarter of 20182020 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting. Based on that evaluation, there were no changes in our internal control over financial reporting or in other factors during the fourth quarter of 20182020 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.
 

100



Management’s Report on Internal Control Over Financial Reporting


MANAGEMENT’S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING


Our Company’s management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rule 13a-15(f). Internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of our consolidated financial statements for external purposes in accordance with generally accepted accounting principles. Under the supervision and with the participation of our Company’s management, including the Chief Executive Officer and Chief Financial Officer, we conducted an evaluation of the effectiveness of our internal control over financial reporting based on the framework in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.
Our internal control over financial reporting includes those policies and procedures that: (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of our assets; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of our consolidated financial statements in accordance with generally accepted accounting principles, and that our receipts and expenditures are being made only in accordance with authorizations of our management and directors; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of our assets that could have a material effect on our consolidated financial statements.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.
Based on our evaluation under the framework in Internal Control—Integrated Framework (2013), the management of our Company concluded that our internal control over financial reporting was effective as of December 31, 2018.2020.
The effectiveness of our internal control over financial reporting as of December 31, 20182020 has been audited by Grant Thornton LLP, an independent registered public accounting firm, as stated in their report that follows.




/s/ Harold G. HammWilliam B. Berry
Chairman of the Board and Chief Executive Officer


/s/ John D. Hart
Senior Vice President, Chief Financial Officer and Treasurer


February 18, 2019

16, 2021

101


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM


Board of Directors and Shareholders
Continental Resources, Inc.


Opinion on internal control over financial reporting
We have audited the internal control over financial reporting of Continental Resources, Inc. (an Oklahoma corporation) and subsidiaries (the “Company”) as of December 31, 2018,2020, based on criteria established in the 2013 Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”). In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2018,2020, based on criteria established in the 2013 Internal Control—Integrated Framework issued by COSO.
We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (“PCAOB”), the consolidated financial statements of the Company as of and for the year ended December 31, 2018,2020, and our report dated February 18, 201916, 2021 expressed an unqualified opinion on those financial statements.
Basis for opinion
The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Report on Internal Control overOver Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.
Definition and limitations of internal control over financial reporting
A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.


/s/ GRANT THORNTON LLP


Oklahoma City, Oklahoma
February 18, 2019

16, 2021

102


Item 9B.Other Information
Item 9B.    Other Information
None.
PART III
 
Item 10.Directors, Executive Officers and Corporate Governance
Item 10.    Directors, Executive Officers and Corporate Governance
Information as to Item 10 will be set forth in the Proxy Statement for the Annual Meeting of Shareholders to be held in May 20192021 (the “Annual Meeting”) and is incorporated herein by reference.
 
Item 11.Executive Compensation
Item 11.    Executive Compensation
Information as to Item 11 will be set forth in the Proxy Statement for the Annual Meeting and is incorporated herein by reference.
 
Item 12.Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters
Item 12.    Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters
Information required by Item 201(d) of Regulation S-K with respect to securities authorized for issuance under equity compensation plans is disclosed in Part II, Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities—Equity Compensation Plan Information and is incorporated herein by reference. Other applicable information required as to Item 12 will be set forth in the Proxy Statement for the Annual Meeting and is incorporated herein by reference.
 
Item 13.Certain Relationships and Related Transactions, and Director Independence
Item 13.    Certain Relationships and Related Transactions, and Director Independence
Information as to Item 13 will be set forth in the Proxy Statement for the Annual Meeting and is incorporated herein by reference.
 
Item 14.Principal Accountant Fees and Services
Item 14.    Principal Accountant Fees and Services
Information as to Item 14 will be set forth in the Proxy Statement for the Annual Meeting and is incorporated herein by reference.

103



PART IV
 
Item 15.Exhibits and Financial Statement Schedules
Item 15.    Exhibits and Financial Statement Schedules
(1) Financial Statements
The consolidated financial statements of Continental Resources, Inc. and Subsidiaries and the Report of Independent Registered Public Accounting Firm are included in Part II, Item 8 of this report. Reference is made to the accompanying Index to Consolidated Financial Statements.
(2) Financial Statement Schedules
All financial statement schedules have been omitted because they are not applicable or the required information is presented in the financial statements or the notes thereto.
(3) Index to Exhibits
The exhibits required to be filed or furnished pursuant to Item 601 of Regulation S-K are set forth below.
3.1
3.2
4.1
4.2
4.34.3*
4.4
4.44.5
4.54.6
4.64.7
4.74.8
10.1†4.9
104


10.1†


10.2†
10.3†
10.4†
10.5†
10.6†
10.7†10.4†
10.8†10.5†
10.910.6
Revolving Credit Agreement dated as of April 9, 2018 among Continental Resources, Inc., as borrower, and its subsidiaries Banner Pipeline Company L.L.C., CLR Asset Holdings, LLC and The Mineral Resources Company as guarantors, MUFG Union Bank, N.A., as Administrative Agent, MUFG Union Bank, N.A., Merrill Lynch, Pierce, Fenner & Smith Incorporated, TD Securities (USA) LLC and Mizuho Bank, Ltd., as Joint Lead Arrangers and Joint Bookrunners, Compass Bank, Citibank, N.A., Export Development Canada, ING Bank, JPMorgan Chase Bank, N.A., U.S. Bank National Association and Wells Fargo Bank, N.A., as Co-Documentation Agents and the other lenders named therein filed as Exhibit 10.1 to the Company’s Current Report on Form 8-K (Commission File No. 001-32886) filed April 12, 2018 and incorporated herein by reference.
10.10†10.7†
10.11†
21*10.8†
10.9†
10.10†
10.11†
10.12†
21*
23.1*
23.2*
31.1*
31.2*
105


32**
99*
101.INS**Inline XBRL Instance Document - the Inline XBRL Instance Document does not appear in the Interactive Data file because its XBRL tags are embedded within the Inline XBRL document
101.SCH**Inline XBRL Taxonomy Extension Schema Document


101.CAL*Inline XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF*Inline XBRL Taxonomy Extension Definition Linkbase Document
101.LAB*Inline XBRL Taxonomy Extension Label Linkbase Document
101.PRE*Inline XBRL Taxonomy Extension Presentation Linkbase Document
101.CAL**104Cover Page Interactive Data File (formatted as Inline XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF**XBRL Taxonomy Extension Definition Linkbase Document
101.LAB**XBRL Taxonomy Extension Label Linkbase Document
101.PRE**XBRL Taxonomy Extension Presentation Linkbase Documentand contained in Exhibit 101)

**    Filed herewith
**Furnished herewith
Management contracts or compensatory plans or arrangements filed pursuant to Item 601(b)(10)(iii) of Regulation S-K.


**    Furnished herewith
†    Management contracts or compensatory plans or arrangements filed pursuant to Item 601(b)(10)(iii) of Regulation S-K.
106


Signatures
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, Continental Resources, Inc. has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
 
CONTINENTAL RESOURCES, INC.
By:
/S/    HAROLD G. HAMMWILLIAM B. BERRY
Name:Harold G. HammWilliam B. Berry
Title:Chairman of the Board and Chief Executive Officer
Date:February 18, 201916, 2021
Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of Continental Resources, Inc. and in the capacities and on the dates indicated.
 
SignatureTitleDate
/s/    HAROLD G. HAMMExecutive Chairman and DirectorFebruary 16, 2021
Harold G. Hamm
SignatureTitleDate

/s/    HAROLD G. HAMM
WILLIAM B. BERRY
Chairman of the Board and
Chief Executive Officer
and Director
(principal executive officer)
February 18, 201916, 2021
Harold G. HammWilliam B. Berry


/s/    JOHN D. HART
Senior Vice President, Chief Financial

Officer and Treasurer

(principal financial and accounting officer)
February 18, 201916, 2021
John D. Hart
/s/    WILLIAM B. BERRYDirectorFebruary 18, 2019
William B. Berry
/s/    SHELLY LAMBERTZDirectorFebruary 18, 201916, 2021
Shelly Lambertz
/s/    LON MCCAINDirectorFebruary 18, 201916, 2021
Lon McCain
/s/    JOHN T. MCNABB IIDirectorFebruary 18, 201916, 2021
John T. McNabb II
/s/    MARK E. MONROEDirectorFebruary 18, 201916, 2021
Mark E. Monroe
/s/    TIMOTHY G. TAYLORDirectorFebruary 16, 2021
Timothy G. Taylor