SUPPLEMENTAL OIL AND GAS RESERVE INFORMATION (UNAUDITED) | NOTE 19—SUPPLEMENTAL OIL AND GAS RESERVE INFORMATION (UNAUDITED) The Partnership has only one reportable operating segment, which is oil and gas producing activities in the United States. See the Partnership’s accompanying consolidated statements of operations for information about results of operations for oil and gas producing activities. Capitalized Oil and Natural Gas Costs Aggregate capitalized costs related to oil and natural gas production activities with applicable accumulated depreciation, depletion and amortization are as follows: December 31, December 31, 2023 2022 Oil, natural gas and NGL interests Proved properties $ 1,825,977,244 $ 1,258,290,375 Unevaluated properties 222,712,844 207,695,343 Total oil, natural gas and NGL interests 2,048,690,088 1,465,985,718 Accumulated depreciation, depletion, accretion and impairment (827,033,944) (712,716,951) Net oil, natural gas and NGL interests capitalized $ 1,221,656,144 $ 753,268,767 Costs Incurred in Oil and Natural Gas Activities Costs incurred in oil, natural gas and NGL acquisition and development activities are as follows: Year Ended December 31, 2023 2022 2021 Acquisition costs Proved properties $ 260,145,370 $ 56,848,235 $ 55,300,252 Unevaluated properties 322,559,000 204,742,000 — Total 582,704,370 261,590,235 55,300,252 Development costs Proved properties — — — Total — — — Total costs incurred on oil, natural gas and NGL activities $ 582,704,370 $ 261,590,235 $ 55,300,252 Results of Operations from Oil, Natural Gas and NGL Producing Activities The following schedule sets forth the revenues and expenses related to the production and sale of oil, natural gas and NGLs. It does not include any interest costs or general and administrative costs and, therefore, is not necessarily indicative of the contribution to the net operating results of the Partnership’s oil, natural gas and NGL operations. Year Ended December 31, 2023 2022 2021 Oil, natural gas and NGL revenues $ 267,584,785 $ 281,964,126 $ 175,088,021 Lease bonus and other income 5,594,855 3,073,609 3,319,104 Production and ad valorem taxes (20,326,477) (16,238,814) (10,480,481) Depreciation and depletion expense (96,477,003) (50,086,414) (36,797,881) Impairment of oil and natural gas properties (18,220,173) — — Marketing and other deductions (12,564,619) (13,383,074) (12,048,643) Results of operations from oil, natural gas and NGLs $ 125,591,368 $ 205,329,433 $ 119,080,120 The following tables summarize the net ownership interest in the proved oil, natural gas and NGL reserves and the standardized measure of discounted future net cash flows related to the proved oil, natural gas and NGL reserves. The estimates were prepared by the Partnership based on reserve reports prepared by Ryder Scott for the years ended December 31, 2023, 2022 and 2021. The proved oil, natural gas and NGL reserve estimates and other components of the standardized measure were determined in accordance with the authoritative guidance of the FASB and the SEC. Proved Oil, Natural Gas and NGL Reserve Quantities Proved reserves are those quantities of oil and 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. Proved developed reserves are proved reserves that can be expected to be recovered through existing wells with existing equipment and operating methods, or in which the cost of the required equipment is relatively minor compared to the cost of a new well. A Boe conversion ratio of six thousand cubic feet per barrel (6mcf/Bbl) of natural gas to barrels of oil equivalence is based on an energy equivalency conversion method primarily applicable at the burner tip and does not represent a price equivalency at the wellhead. All Boe conversions in the report are derived from converting gas to oil in the ratio mix of six thousand cubic feet of gas to one barrel of oil. The Partnership’s net proved oil, natural gas and NGL reserves and changes in net proved oil, natural gas and NGL reserves attributable to the oil, natural gas and NGL properties, which are located in multiple states are summarized below: Crude Oil and Natural Gas Condensate Natural Gas Liquids Total (MBbls) (MMcf) (MBbls) (MBOE) Net proved reserves at January 1, 2021 12,294 144,233 6,085 42,418 Revisions of previous estimates (1) 251 24,079 780 5,044 Purchase of minerals in place (2) 1,310 8,537 519 3,252 Production (1,344) (19,085) (715) (5,240) Net proved reserves at December 31, 2021 12,511 157,764 6,669 45,474 Revisions of previous estimates (1) (58) 17,119 759 3,554 Purchase of minerals in place (3) 1,328 5,726 707 2,989 Production (1,426) (20,311) (747) (5,558) Net proved reserves at December 31, 2022 12,355 160,298 7,388 46,459 Revisions of previous estimates (1) 3,273 26,068 814 8,432 Purchase of minerals in place (4) 6,565 41,560 4,400 17,892 Production (2,393) (23,384) (1,083) (7,374) Net proved reserves at December 31, 2023 19,800 204,542 11,519 65,409 Net proved developed reserves December 31, 2021 12,511 157,764 6,669 45,474 December 31, 2022 12,355 160,298 7,388 46,459 December 31, 2023 19,800 204,542 11,519 65,409 (1) Revisions of previous estimates include technical revisions due to changes in commodity prices, historical and projected performance and other factors. (2) Includes the acquisition of mineral and royalty interests for a total of $55.3 million, primarily consisting of mineral and royalty interests in the Permian Basin, Mid-Continent, Haynesville and other leading U.S. basins. (3) Includes the acquisition of mineral and royalty interests for a total of $56.8 million, primarily consisting of mineral and royalty interests in the Permian Basin. (4) Includes the acquisition of mineral and royalty interests, primarily consisting of mineral and royalty interests in the Permian Basin and Mid-Continent. Revisions represent changes in previous reserves estimates, either upward or downward, resulting from new information normally obtained from development drilling and production history or resulting from a change in economic factors, such as commodity prices, operating costs or development costs. Standardized Measure The standardized measure of discounted future net cash flows before income taxes related to the proved oil, natural gas and NGL reserves of the properties is as follows (in thousands): Year Ended December 31, 2023 2022 2021 Future cash inflows $ 2,226,313 $ 2,253,273 $ 1,335,917 Future production costs (164,848) (161,676) (100,947) Future state margin taxes (49,144) (76,322) (42,965) Future net cash flows 2,012,321 2,015,275 1,192,005 Less 10% annual discount to reflect timing of cash flows (1,037,192) (1,110,980) (665,390) Standard measure of discounted future net cash flows $ 975,129 $ 904,295 $ 526,615 Reserve estimates and future cash flows are based on the average market prices for sales of oil, natural gas and NGL adjusted for basis differentials, on the first calendar day of each month during the year. The average prices used for 2023, 2022 and 2021 were $78.22, $93.67 and $66.56 per barrel for crude oil and $2.64, $6.36 and $3.60 per Mcf for natural gas, respectively. Future production costs are computed primarily by the Partnership’s petroleum engineers by estimating the expenditures to be incurred in producing the proved oil and gas reserves at the end of the year, based on year-end costs and assuming continuation of existing economic conditions. A discount factor of 10% was used to reflect the timing of future net cash flows. The standardized measure of discounted future net cash flows is not intended to represent the replacement cost or fair value of the properties. An estimate of fair value would also take into account, among other things, the recovery of reserves not presently classified as proved, anticipated future changes in prices and costs, and a discount factor more representative of the time value of money and the risks inherent in oil, natural gas and NGL reserve estimates. Changes in Standardized Measure Changes in the standardized measure of discounted future net cash flows before income taxes related to the proved oil, natural gas and NGL reserves of the properties are as follows (in thousands): Year Ended December 31, 2023 2022 2021 Standardized measure - beginning of year $ 904,295 $ 526,615 $ 284,996 Sales, net of production costs (236,953) (252,597) (152,751) Net changes of prices and production costs related to future production (302,599) 365,427 225,868 Revisions of previous quantity estimates, net of related costs 128,727 71,776 60,517 Net changes in state margin taxes 10,433 (15,266) (8,665) Accretion of discount 78,425 44,280 25,743 Purchases of reserves in place 435,230 77,719 40,545 Timing differences and other (42,429) 86,341 50,362 Standardized measure - end of year $ 975,129 $ 904,295 $ 526,615 |