Exhibit 99.1 Anadarko Announces Fourth-Quarter and 2003 Financial and Operating Results HOUSTON--(BUSINESS WIRE)--Jan. 30, 2004--Anadarko Petroleum Corporation (NYSE:APC) -- RECORD EARNINGS OF $1.3 BILLION FOR 2003 -- EXCELLENT F&D COSTS OF $6.95 PER BOE -- RESERVE REPLACEMENT RATE OF NEARLY 200% -- RESERVE GROWTH OF 8% Anadarko Petroleum Corporation (NYSE:APC) today announced fourth-quarter and full-year 2003 financial results, as well as operating results from oil and natural gas activities worldwide. "Anadarko had a good year," said Jim Hackett, Anadarko president and CEO. "We intensified our focus on the basics of finding high-value oil and natural gas reserves and we accomplished that with excellent finding and development costs of $6.95 per BOE. Plus, we achieved record earnings and more than replaced annual production with new reserves for the 22nd consecutive year." FOURTH QUARTER 2003 FINANCIAL RESULTS For the fourth quarter of 2003, Anadarko reported net income available to common shareholders of $294 million, or $1.17 per share (diluted), on revenues of $1.28 billion. Earnings for the fourth quarter of 2002 were $309 million, or $1.21 per share (diluted), on revenues of $1.12 billion. Cash flow from operating activities totaled $744 million in the fourth quarter, compared with $691 million for the fourth quarter 2002. Cash flow from operations before changes in assets and liabilities for the fourth quarter of 2003 totaled $728 million, compared with $713 million for the fourth quarter in 2002.(1) Sales volumes for the fourth quarter totaled 49 million barrels of oil equivalent (BOE), flat compared to the same quarter of 2002. FULL YEAR 2003 FINANCIAL RESULTS Anadarko reported full-year 2003 net income available to common shareholders of $1.29 billion, or $5.09 per share (diluted), on revenues of $5.12 billion. This compares to 2002 net income of $825 million, or $3.21 per share (diluted), on revenues of $3.85 billion. Cash flow from operating activities totaled $3.04 billion in 2003, up 39 percent from $2.20 billion in 2002. Cash flow from 2003 operations before changes in assets and liabilities totaled $3.16 billion, compared with $2.21 billion in 2002.(1) "Anadarko delivered on its promise to maintain capital discipline throughout 2003," Hackett added. "We committed to pay down $300 million in debt and actually reduced debt by over $400 million last year. At the same time, we increased reserves by 8 percent at a very competitive cost, translating directly into increased value for shareholders." Sales volumes of natural gas, crude oil and natural gas liquids for 2003 totaled 192 million BOE, meeting the company's guidance. Volumes for 2002 were 197 million BOE, which included seven million BOE related to properties that were sold in 2002. FINDING & DEVELOPMENT COSTS Anadarko's 2003 total worldwide finding and development costs (F&D) for proved reserves averaged $6.95 per BOE, reflecting costs of additions from drilling, property acquisitions and the effect of reserve revisions.(2) "Anadarko delivered excellent finding costs -- particularly in the U.S.," Hackett said. "Our land position and exploitation expertise delivered F&D costs in the onshore Lower 48 of just $4.37 per BOE in 2003." RESERVE REPLACEMENT Anadarko's worldwide reserve replacement rate from all sources was nearly 200 percent of annual production, with 377 million BOE of net reserves added. This is the 22nd consecutive year that Anadarko has more than replaced annual production with new proved reserves. The net reserve adds include the effect of changes from all sources -- drilling, producing property acquisitions and divestitures, and revisions to earlier estimates. "I am confident about Anadarko's proved reserve numbers," stated Hackett. "Every year, we review every well on every property in every field, and we believe our internal reviews of those reserves are solid. As an added measure of discipline, early in 2003 we hired an outside reserve engineering consultant -- Netherland, Sewell & Associates, Inc. -- to serve as a member of our internal reserve review team. We charged them with reviewing the processes, procedures and resulting estimates of our 2003 bookings. As a result, they reviewed 70 percent of our 2003 reserve additions and approximately 50 percent of existing proved reserves. We have received their letter of confidence in both our process and the reasonableness of our numbers." The Netherland, Sewell & Associates, Inc. letter of confidence is provided as an attachment to this document. PROVED RESERVES Anadarko increased proved reserves worldwide by 8 percent to 2.5 billion BOE at year-end 2003 from 2.3 billion BOE at year-end 2002. In 2003, the company also cost-effectively converted a significant number of proved undeveloped reserves into proved developed reserves, which increased proved developed reserves from 67 percent to 69 percent of total worldwide reserves. "Proved undeveloped reserves, or PUDs, represent the future of a growing company. So we continue to pay close attention to booked PUD reserves. We know the length of time each PUD remains on our books as undeveloped and have an action plan for developing all of them," Hackett explained. Domestic reserves rose 12 percent to 1.7 billion BOE, representing 68 percent of the company's worldwide reserves. The primary growth areas are the Gulf of Mexico, North Louisiana Vernon field, the Carthage and Austin Chalk fields in Texas, and the Wyoming Salt Creek enhanced oil recovery project. Canadian proved reserves increased 9 percent, totaling 314 million BOE, representing over 12 percent of total worldwide reserves. Anadarko's proved reserves remain nearly balanced between natural gas (51 percent) and crude oil, condensate and liquids (49 percent). Proved reserves of oil and liquids totaled 1.2 billion barrels at year-end 2003, representing an 8 percent increase from the previous year. Proved natural gas reserves at year-end 2003 totaled 7.7 trillion cubic feet, also up 8 percent from the previous year. Ninety-eight percent of the company's proved natural gas reserves are located in the U.S. and Canada. Acquisitions of producing properties primarily in the Gulf of Mexico and Wyoming added 54 million BOE of reserves in 2003. Divestitures of non-core properties in the U.S. and Canada totaled 14 million BOE of reserves. FOURTH QUARTER 2003 OPERATING HIGHLIGHTS -- During the fourth quarter, Anadarko Canada achieved the highest natural gas production levels in its history. Among the factors contributing to this record is the completion of a major expansion of the Wild River gas plant (APC 100%) that lifted gas capacity to a total of 79 million cubic feet per day (MMcf/d), which is already being utilized. An additional 4 MMcf/d of capacity is expected to be added in the first quarter of 2004. Development drilling success continues to drive plant capacity planning for the future. -- The company drilled its first well on the Gulf of Mexico properties acquired from Amerada Hess in June 2003. The South Timbalier 166 E-4 well encountered 203 feet of net pay. Anadarko holds a 60 percent working interest in the well. -- Anadarko made a deepwater oil discovery in the Gulf of Mexico at Green Canyon Block 518. The well, just north of Anadarko's K2 discovery, significantly extends the boundaries of the K2 field northward. Production will be fast tracked through a sub-sea tieback to the Marco Polo platform, which was successfully installed in January. -- Anadarko and its partners made a deepwater natural gas discovery at the Spiderman prospect in the Eastern Gulf of Mexico. Spiderman is Anadarko's third Eastern Gulf discovery during 2003, and was followed by a modest satellite discovery this month, Atlas Northwest. -- In the Vernon field in North Louisiana, natural gas production averaged 195 MMcf/d in the fourth quarter, up from about 117 MMcf/d in the first quarter of 2003. -- Anadarko completed construction of a 16-inch, 125-mile pipeline that recently began transporting carbon dioxide (CO2) across Wyoming to the Salt Creek oil field north of Casper. This enhanced oil recovery project is expected to increase net production from 5,000 barrels per day to a peak rate of 32,000 barrels per day over the next several years. FINANCIAL & SUPPLEMENTAL DATA ENCLOSED IN THIS REPORT -- Reconciliation of GAAP to Non-GAAP Measures -- Summary Financial Information -- Volumes and Prices -- Oil and Gas Reserves -- Cost Incurred in Oil and Gas Producing Properties -- Reserve letter of confidence from Netherland, Sewell & Associates, Inc. EARNINGS CONFERENCE CALL TODAY, JAN. 30, AT 9:30 A.M. CST (10:30 A.M. EST) Anadarko will host a conference call today, Jan. 30, at 9:30 a.m. Central Standard Time (10:30 a.m. Eastern Standard Time) to discuss fourth-quarter and full-year 2003 results and the company's outlook for 2004. To actively participate and ask questions during the conference call, dial 913-981-4910 and use confirmation number 338273. Those who wish to listen to the live audio webcast and view the presentation material may do so via the Internet at www.anadarko.com. For complete instructions on how to participate or to access the replay after the call, visit our Web site at www.anadarko.com. ANADARKO OPERATIONS REPORT A comprehensive fourth-quarter 2003 operations report will be posted today on the company's Web site: www.anadarko.com. Anadarko Petroleum Corporation is one of the world's largest independent oil and gas exploration and production companies. Houston-based Anadarko is active in the U.S., Canada, Algeria and Qatar and is executing strategic exploration programs in several other countries. More information is available at www.anadarko.com. (1) See accompanying table for a reconciliation of GAAP to non-GAAP financial measures utilized in calculating cash flow from operations before changes in assets and liabilities and statements indicating why management believes the non-GAAP measure of cash flow is useful information for investors. (2) F&D costs per BOE exclude the effect of asset retirement costs and include actual asset retirement expenditures which is consistent with prior years' method of calculation. This news release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities and Exchange Act of 1934. Anadarko believes that its expectations are based on reasonable assumptions. No assurance, however, can be given that its goals will be achieved. A number of factors could cause actual results to differ materially from the projections, anticipated results or other expectations expressed in this release. While Anadarko makes these forward-looking statements in good faith, neither Anadarko nor its management can guarantee that the anticipated future results will be achieved. Anadarko discloses proved reserves that comply with the Securities and Exchange Commission's (SEC) definitions. Additionally, Anadarko may disclose estimated reserves, which the SEC guidelines do not allow us to include in filings with the SEC. See Additional Factors Affecting Business in the Management's Discussion and Analysis included in the company's 2002 Annual Report on Form 10-K. Anadarko Petroleum Corporation Reconciliation of GAAP to Non-GAAP Measures Below is a reconciliation of cash provided by operating activities (GAAP) to cash flow from operations before changes in assets and liabilities (non-GAAP) as required under Regulation G of the Securities Exchange Act of 1934. The company uses cash flow from operations before changes in assets and liabilities to demonstrate the company's ability to internally fund capital expenditures and to service or incur additional debt. It is useful in comparisons of oil and gas exploration and production companies because it excludes fluctuations in assets and liabilities. Quarter Ended Year Ended December 31 December 31 -------------------- ------------------- millions 2003 2002 2003 2002 - ---------------------------------------------------------------------- Cash Flow - ---------------------------------------------------------------------- Net cash provided by operating activities $744 $691 $3,043 $2,196 Add back: Change in accounts receivable (17) 240 (46) 103 Change in accounts payable and accrued expenses (24) (228) 68 (181) Change in other items - net 25 10 99 94 - ---------------------------------------------------------------------- Cash flow from operations before changes in assets and liabilities $728 $713 $3,164 $2,212 - ---------------------------------------------------------------------- Anadarko Petroleum Corporation Quarter Ended Year Ended Summary Financial Information (a) December 31 December 31 -------------- ---------------- $ and shares in millions 2003 2002 2003 2002 - ---------------------------------------------------------------------- Revenues - ---------------------------------------------------------------------- Gas sales $686 $538 $2,851 $1,828 Oil and condensate sales 450 485 1,787 1,682 Natural gas liquids sales 110 66 365 222 Other sales 32 26 119 113 - ---------------------------------------------------------------------- Total 1,278 1,115 5,122 3,845 - ---------------------------------------------------------------------- Costs and Expenses - ---------------------------------------------------------------------- Operating expenses 241 192 828 747 Administrative and general 103 87 352 314 Depreciation, depletion and amortization 343 292 1,297 1,121 Other taxes 78 46 294 214 Impairments related to oil and gas properties 11 6 103 39 Restructuring costs 7 - 40 - - ---------------------------------------------------------------------- Total 783 623 2,914 2,435 - ---------------------------------------------------------------------- Operating Income 495 492 2,208 1,410 - ---------------------------------------------------------------------- Other (Income) Expense - ---------------------------------------------------------------------- Interest expense 66 57 253 203 Other (income) expense 6 2 (19) - - ---------------------------------------------------------------------- Total 72 59 234 203 - ---------------------------------------------------------------------- Income Before Income Taxes 423 433 1,974 1,207 - ---------------------------------------------------------------------- Income Tax Expense 128 122 729 376 - ---------------------------------------------------------------------- Net Income Before Cumulative Effect of Change in Accounting Principle $295 $311 $1,245 $831 - ---------------------------------------------------------------------- Preferred Stock Dividends 1 2 5 6 - ---------------------------------------------------------------------- Net Income Available to Common Stockholders Before Cumulative Effect of Change in Accounting Principle $294 $309 $1,240 $825 - ---------------------------------------------------------------------- Cumulative Effect of Change in Accounting Principle - - 47 - - ---------------------------------------------------------------------- Net Income Available to Common Stockholders $294 $309 $1,287 $825 - ---------------------------------------------------------------------- Per Common Share - ---------------------------------------------------------------------- Net income - before change in accounting principle - basic $1.18 $1.25 $4.97 $3.32 Net income - before change in accounting principle - diluted $1.17 $1.21 $4.91 $3.21 Change in accounting principle - basic $- $- $0.19 $- Change in accounting principle - diluted $- $- $0.18 $- Net income - basic $1.18 $1.25 $5.16 $3.32 Net income - diluted $1.17 $1.21 $5.09 $3.21 - ---------------------------------------------------------------------- Average Number of Common Shares Outstanding - Basic 250 249 250 248 - ---------------------------------------------------------------------- Average Number of Common Shares Outstanding - Diluted 252 258 253 260 - ---------------------------------------------------------------------- (a) Unrealized gains and losses on derivative instruments that did not meet the conditions to qualify for hedge accounting have been reclassified to conform to the current presentation. The effect on prior periods is insignificant. Anadarko Petroleum Corporation Quarter Ended Year Ended Summary Financial Information (a) December 31 December 31 ---------------- ----------------- $ in millions 2003 2002 2003 2002 - --------------------------------------------------------------------- Cash Flow - --------------------------------------------------------------------- Net income before cumulative effect of change in accounting principle $295 $311 $1,245 $831 Depreciation, depletion and amortization 343 292 1,297 1,121 Interest expense - zero coupon debentures - 3 4 13 Deferred income taxes 86 98 505 214 Impairments related to oil and gas properties 11 6 103 39 Other non-cash items (7) 3 10 (6) - --------------------------------------------------------------------- Cash Flow from Operations 728 713 3,164 2,212 - --------------------------------------------------------------------- (Increase) decrease in accounts receivable 17 (240) 46 (103) Increase (decrease) in accounts payable and accrued expenses 24 228 (68) 181 Other items - net (25) (10) (99) (94) - --------------------------------------------------------------------- Net Cash Provided by Operating Activities $744 $691 $3,043 $2,196 - --------------------------------------------------------------------- - --------------------------------------------------------------------- Capital Expenditures - --------------------------------------------------------------------- Capital spending $555 $476 $2,484 $2,037 Capitalized interest 27 34 121 155 Capitalized overhead 45 48 187 196 - --------------------------------------------------------------------- Total $627 $558 $2,792 $2,388 - --------------------------------------------------------------------- December December 31, 31, 2003 2002 - --------------------------------------------------------------------- Condensed Balance Sheet - --------------------------------------------------------------------- Current assets $1,324 $1,280 Net properties and equipment 17,396 15,098 Other assets 437 436 Goodwill 1,389 1,434 - --------------------------------------------------------------------- Total Assets $20,546 $18,248 - --------------------------------------------------------------------- Current liabilities $1,715 $1,861 Long-term debt 5,058 5,171 Other long-term liabilities 5,174 4,244 Stockholders' equity 8,599 6,972 - --------------------------------------------------------------------- Total Liabilities and Stockholders' Equity $20,546 $18,248 - --------------------------------------------------------------------- Capitalization - --------------------------------------------------------------------- Total debt $5,058 $5,471 Stockholders' equity 8,599 6,972 - --------------------------------------------------------------------- Total $13,657 $12,443 - --------------------------------------------------------------------- Capitalization Ratios - --------------------------------------------------------------------- Total debt 37% 44% Stockholders' equity 63% 56% - --------------------------------------------------------------------- (a) Unrealized gains and losses on derivative instruments that did not meet the conditions to qualify for hedge accounting have been reclassified to conform to the current presentation. The effect on prior periods is insignificant. Anadarko Petroleum Corporation Quarter Ended Year Ended Volumes and Prices (a) December 31 December 31 --------------- --------------- 2003 2002 2003 2002 - ---------------------------------------------------------------------- Natural Gas - ---------------------------------------------------------------------- United States - ---------------------------------------------------------------------- Volumes, billion cubic feet 125 119 503 507 Average daily volumes, million cubic feet per day 1,365 1,295 1,379 1,390 Price per thousand cubic feet $4.19 $3.46 $4.36 $2.83 - ---------------------------------------------------------------------- Canada - ---------------------------------------------- ------- ------- ------- Volumes, billion cubic feet 37 36 140 135 Average daily volumes, million cubic feet per day 397 387 383 370 Price per thousand cubic feet $4.37 $3.53 $4.71 $2.91 - ---------------------------------------------------------------------- Total - ---------------------------------------------------------------------- Volumes, billion cubic feet 162 155 643 642 Average daily volumes, million cubic feet per day 1,762 1,682 1,762 1,760 Price per thousand cubic feet $4.23 $3.48 $4.43 $2.85 - ---------------------------------------------------------------------- Crude Oil and Condensate - ---------------------------------------------------------------------- United States - ---------------------------------------------------------------------- Volumes, million barrels 8 8 34 31 Average daily volumes, thousand barrels per day 89 84 93 85 Price per barrel $25.28 $24.79 $26.16 $22.90 - ---------------------------------------------------------------------- Canada - ---------------------------------------------------------------------- Volumes, million barrels 1 2 6 12 Average daily volumes, thousand barrels per day 16 19 17 33 Price per barrel $26.59 $22.20 $27.33 $19.09 - ---------------------------------------------------------------------- Algeria - ---------------------------------------------------------------------- Volumes, million barrels 5 8 19 24 Average daily volumes, thousand barrels per day 52 87 52 65 Price per barrel $29.53 $25.99 $28.43 $24.38 - ---------------------------------------------------------------------- Other International - ---------------------------------------------------------------------- Volumes, million barrels 3 2 8 8 Average daily volumes, thousand barrels per day 29 24 22 22 Price per barrel $23.58 $21.50 $23.15 $19.92 - ---------------------------------------------------------------------- Total - ---------------------------------------------------------------------- Volumes, million barrels 17 20 67 75 Average daily volumes, thousand barrels per day 186 214 184 205 Price per barrel $26.31 $24.69 $26.55 $22.44 - ---------------------------------------------------------------------- Natural Gas Liquids - ---------------------------------------------------------------------- Total - ---------------------------------------------------------------------- Volumes, million barrels 5 4 17 15 Average daily volumes, thousand barrels per day 56 41 47 41 Price per barrel $21.36 $17.47 $21.18 $14.80 - ---------------------------------------------------------------------- Total Barrels of Oil Equivalent (BOE) - ---------------------------------------------------------------------- Volumes, million BOE 49 49 192 197 Average daily volumes, thousand BOE per day 535 535 525 539 - ---------------------------------------------------------------------- (a) Unrealized gains and losses on derivative instruments that did not meet the conditions to qualify for hedge accounting have been reclassified to conform to the current presentation. The effect on prior periods is insignificant. Anadarko Petroleum Corporation Oil and Gas Reserves Other U.S. Canada Algeria Int'l Total --------------------------------------------------------------------- Total (MMBOE) --------------------------------------------------------------------- Proved Reserves --------------------------------------------------------------------- December 31, 2002 1,526 288 372 142 2,328 Revisions of prior estimates (12) 11 3 - 2 Extensions, discoveries and other additions 219 41 5 - 265 Improved recovery 68 2 - - 70 Purchases in place 46 8 - - 54 Sales in place (8) (6) - - (14) Production (135) (30) (19) (8) (192) --------------------------------------------------------------------- December 31, 2003 1,704 314 361 134 2,513 --------------------------------------------------------------------- Proved Developed Reserves --------------------------------------------------------------------- December 31, 2002 1,093 212 191 72 1,568 December 31, 2003 1,238 242 182 65 1,727 --------------------------------------------------------------------- Natural Gas (Bcf) --------------------------------------------------------------------- Proved Reserves --------------------------------------------------------------------- December 31, 2002 5,693 1,343 - 144 7,180 Revisions of prior estimates (172) 57 - - (115) Extensions, discoveries and other additions 982 221 - - 1,203 Improved recovery (7) 2 - - (5) Purchases in place 115 48 - - 163 Sales in place (21) (38) - - (59) Production (503) (140) - - (643) --------------------------------------------------------------------- December 31, 2003 6,087 1,493 - 144 7,724 --------------------------------------------------------------------- Proved Developed Reserves --------------------------------------------------------------------- December 31, 2002 4,299 995 - - 5,294 December 31, 2003 4,725 1,164 - - 5,889 --------------------------------------------------------------------- Oil, Condensate and NGLs (MMBbls) --------------------------------------------------------------------- Proved Reserves --------------------------------------------------------------------- December 31, 2002 578 64 372 117 1,131 Revisions of prior estimates 16 2 3 - 21 Extensions, discoveries and other additions 55 4 5 - 64 Improved recovery 70 2 - - 72 Purchases in place 27 - - - 27 Sales in place (4) - - - (4) Production (51) (7) (19) (8) (85) --------------------------------------------------------------------- December 31, 2003 691 65 361 109 1,226 --------------------------------------------------------------------- Proved Developed Reserves --------------------------------------------------------------------- December 31, 2002 377 46 191 72 686 December 31, 2003 451 48 182 65 746 --------------------------------------------------------------------- Anadarko Petroleum Corporation Costs Incurred in Oil and Gas Producing Activities millions 2003 - ---------------------------------------------------------------------- United States - Capitalized Property acquisition Exploration $100 Development 203 Exploration 454 Development 1,251 - ---------------------------------------------------------------------- Total United States - Finding and Development Costs 2,008 - ---------------------------------------------------------------------- Plus: Asset retirement costs 164 Less: Actual retirement expenditures (15) - ---------------------------------------------------------------------- Total United States - Costs Incurred 2,157 - ---------------------------------------------------------------------- Canada - Capitalized Property acquisition Exploration 24 Exploration 176 Development 297 - ---------------------------------------------------------------------- Total Canada - Finding and Development Costs 497 - ---------------------------------------------------------------------- Plus: Asset retirement costs 15 Less: Actual retirement expenditures (5) - ---------------------------------------------------------------------- Total Canada - Costs Incurred 507 - ---------------------------------------------------------------------- Algeria - Capitalized Exploration 17 Development 61 - ---------------------------------------------------------------------- Total Algeria - Finding and Development Costs 78 - ---------------------------------------------------------------------- Plus: Asset retirement costs 1 Less: Actual retirement expenditures - - ---------------------------------------------------------------------- Total Algeria - Costs Incurred 79 - ---------------------------------------------------------------------- Other International - Capitalized Exploration 66 Development 70 - ---------------------------------------------------------------------- Total Other International - Finding and Development Costs 136 - ---------------------------------------------------------------------- Plus: Asset retirement costs 7 Less: Actual retirement expenditures - - ---------------------------------------------------------------------- Total Other International - Costs Incurred 143 - ---------------------------------------------------------------------- Total - Capitalized Property acquisition Exploration 124 Development 203 Exploration 713 Development 1,679 - ---------------------------------------------------------------------- Total - Finding and Development Costs 2,719 - ---------------------------------------------------------------------- Plus: Asset retirement costs 187 Less: Actual retirement expenditures (20) - ---------------------------------------------------------------------- Total - Costs Incurred $2,886 - ---------------------------------------------------------------------- The 2003 total costs incurred include asset retirement costs and exclude actual retirement expenditures in accordance with the Financial Accounting Standards Board staff memorandum issued January 21, 2004. The 2003 total costs incurred exclude the initial asset retirement costs as of January 1, 2003. Finding and development costs are consistent with prior years' costs incurred. NSAI Netherland, Sewell & Associates, Inc. Worldwide Petroleum Consultants 4500 Thanksgiving Tower - 1601 Elm Street, Dallas, TX 75201-4754 1221 Lamar Street, Suite 1200, Houston, TX 77010-3072 January 21, 2004 Mr. Randall L. Couch Anadarko Petroleum Corporation 1201 Lake Robbins Drive The Woodlands, Texas 77380 Dear Mr. Couch: In accordance with your request, we have completed a review of the procedures and methods used by Anadarko Petroleum Corporation (Anadarko) in preparing its estimates of proved reserves and future revenue for certain oil and gas properties, as of December 31, 2003. These reserve and future revenue estimates were prepared by Anadarko's internal technical staff. The opinions expressed herein are based on our involvement as a member of Anadarko's Reserve Review Team and our exposure to Anadarko's reserve estimating process. As a member of the Reserve Review Team, we met with Anadarko personnel and reviewed the geologic and engineering methodologies used as well as the resulting reserve estimates prepared by Anadarko for certain fields identified by designated screening criteria. In total, 10 separate reserve review meetings were conducted in Anadarko's offices in The Woodlands, Texas; Calgary, Alberta; and Uxbridge, England. The meetings ranged in duration from 2 to 7 hours each. The United States properties reviewed included the Vernon Field Area located in Louisiana; the Marco Polo/K2 Prospect and the major Hess Acquisition properties in the Gulf of Mexico; the Carthage Field Area, the Haley Field, and the Austin Chalk properties in Texas; and the Monell Unit and the Salt Creek Field in Wyoming. In Canada, the top 10 field areas and other significant properties were reviewed comprising approximately 80 percent of Anadarko's reserves in Canada. For Algeria, we received an overview of Anadarko's concession as well as a detailed technical review of the HBNS Field, the largest of the producing fields in Algeria. We also reviewed the key provisions of the services contract for the Oritupano-Leona Block in Venezuela. It is our understanding that the properties reviewed represent approximately 50 percent of the total proved reserves of Anadarko; and, that in the course of these meetings we reviewed approximately 70 percent of the 2003 projected reserve additions. The goal of this review was to verify that the reserve estimates were prepared in accordance with the guidelines and definitions of the Securities and Exchange Commission (SEC) using generally accepted engineering and evaluation principles; and to determine, for the properties reviewed, the reasonableness of Anadarko's methods, procedures, and estimates. The reviews focused on the reserve determination methodologies and the data used in preparing these estimates. The available data reviewed included, but were not limited to, seismic data, structure and isopach maps, well logs, production tests, material balance calculations, reservoir simulation models, reservoir pressures, individual well and field performance data, individual well and field projections, offset performance data, operating expenses, capital costs, and product prices. The reviews were sufficient to determine that the general methods and procedures used by Anadarko in the reserve estimation process are reasonable. In our opinion, the estimates for those properties reviewed appear reasonable and have been prepared in accordance with SEC guidelines and definitions using generally accepted petroleum engineering and evaluation principles. It should be understood that this is a review of procedures, methods, and certain internal estimates only and does not constitute a complete review, study, or audit of Anadarko's estimated proved reserves and future revenue. We did not consider Anadarko's probable or possible estimates in this procedural review. We made no verification of the accuracy and completeness of the information and data provided by Anadarko with respect to ownership interest, oil and gas production, well test data, reservoir pressures, oil and gas prices, and operating and development costs. Netherland, Sewell & Associates, Inc. is a firm of professionals dedicated to providing superior consulting service to the international petroleum industry. Our company has provided due diligence, technical support, and economic evaluations for private and government companies and financial institutions throughout the world. We are independent petroleum engineers, geologists, geophysicists, and petrophysicists with respect to Anadarko Petroleum Corporation as provided in the Standards Pertaining to the Estimating and Auditing of Oil and Gas Reserve Information promulgated by the Society of Petroleum Engineers. We do not own an interest in these properties and are not employed on a contingent basis. Very truly yours, // Frederic D. Sewell Chairman & CEO Netherland, Sewell & Associates, Inc. CONTACT: Anadarko Petroleum Corporation, Houston Media Contacts: Teresa Wong, 832-636-1203 teresa_wong@anadarko.com or Lee Warren, 832-636-3321 lee_warren@anadarko.com or Investor Contacts: David Larson, 832-636-3265 david_larson@anadarko.com or Stewart Lawrence, 832-636-3326 stewart_lawrence@anadarko.com