EXHIBIT (C)(3) Confidential Project Viper PRESENTATION TO THE SPECIAL COMMITTEE May 23, 2000 [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] PROJECT VIPER / MAY 23, 2000 Confidential Material Presented to the Special Committee The following pages contain material provided to the Special Committee of the Board of Directors (the "Special Committee") of Viper ("Viper" or the "Company") in the context of a meeting of the Special Committee held to consider the proposed merger of the Company with a wholly-owned subsidiary of Boa. The accompanying material was compiled or prepared on a confidential basis solely for use by the Special Committee and not with a view toward public disclosure under state and federal securities laws or otherwise. The information utilized in preparing this presentation was obtained from the Company and public sources. Any estimates and projections for the Company contained herein have been prepared by management, or are based upon such estimates and projections, and involve numerous and significant subjective determinations, which may or may not prove to be correct. No representation or warranty, express or implied, is made as to the accuracy or completeness of such information, and nothing contained herein is, or shall be relied upon as, a representation, whether as to the past or the future. Because this material was prepared for use in the context of an oral presentation to the Special Committee, which is familiar with the business and the affairs of the Company, neither the Company nor Salomon Smith Barney Inc. nor Petrie Parkman & Co. nor any of their respective legal or financial advisors or accountants take any responsibility for the accuracy or completeness of any of the material if used by persons other than the Special Committee. Neither the Company nor Salomon Smith Barney Inc. nor Petrie Parkman & Co. undertakes any obligation to update or otherwise revise the accompanying materials. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] PROJECT VIPER / MAY 23, 2000 Table of Contents 1 TRANSACTION OVERVIEW 2 MARKET UPDATE 3 VALUATION MATERIALS 4 PRECEDENT MINORITY SQUEEZE-OUT PREMIUMS APPENDIX A. Salomon Smith Barney Valuation Analysis B. Petrie Parkman & Co. Valuation Analysis [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] PROJECT VIPER / MAY 23, 2000 1 TRANSACTION OVERVIEW [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] PROJECT VIPER / MAY 23, 2000 Scope of Work IN FORMULATING OUR OPINIONS, SALOMON SMITH BARNEY AND PETRIE PARKMAN & CO. REVIEWED: . A draft of the Merger Agreement, dated May 19, 2000 . Certain publicly-available information regarding Viper . Internal financial forecasts for Viper, prepared by management . Publicly-available information regarding the trading of, and the trading market for, Viper common stock and for certain other companies, the operations of which are similar to those of Viper . Publicly-available information regarding the terms of other M&A transactions and asset acquisitions we each considered relevant . Other economic, financial, and market information we each deemed relevant The Special Committee of the Board of Directors has asked Salomon Smith Barney and Petrie Parkman & Co. to render opinions as to the fairness, from a financial point of view, of the consideration to be received in the offer dated May 19 and the merger by the public shareholders of Viper common stock. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 1 PROJECT VIPER / MAY 23, 2000 Transaction Structure TRANSACTION STRUCTURE . Pursuant to the Merger Agreement to be executed between Viper and Boa, Viper will be merged with a newly-formed subsidiary of Anaconda, becoming a wholly-owned subsidiary of Anaconda, which is itself wholly- owned by Boa TERMS . The public shareholders of Viper, who represent approximately 18% of the diluted shares outstanding, will receive $83 in cash per Viper share (the "May 19 Offer") - Boa originally had offered $71 in cash per Viper share on March 16, 2000 (the "Initial Offer") CONDITIONS . The only material condition to the merger is the approval of two-thirds of the outstanding voting stock of Viper not already owned by Viper, Anaconda or Boa MISCELLANEOUS . In the event of termination, no break-up fee or other payment shall be provided to either party, and both parties shall be responsible for their own expenses ESTIMATED TIMING . Boa and Viper intend to announce on May 23, after the markets close in the United States . Boa and Viper will file a merger proxy and Schedule 13E-3 with the SEC as soon as practicable . A shareholder meeting will occur as soon as practicable, but not less than 20 business days after the mailing of the proxy statement [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 2 PROJECT VIPER / MAY 23, 2000 May 19 Offer Implied Multiples (Dollars in millions) May 19 Offer --------------------- Offer Price $ 83.00 Fully-Diluted Shares Outstanding 100.3 ------- $ 8,325 Less: Option Proceeds ($ 97) ------- Equity Value $ 8,229 Plus: Total Debt (@ 3/31/00) $ 940 Less: Cash (@ 3/31/00) (5) ------- Firm Value ("FV") $ 9,164 First Call /(4)/ N Y M E X /(5)/ ----------------------- --------------------- 1999 2000E 2001E 2000E 2001E --------- ----------------------- ---------------------- Price/Earnings Per Share 38.6x 27.2x 27.6x 15.4x 16.9x Price/Cash Flow/(1)/ Per Share 8.7 7.8 7.8 6.4 6.6 FV/EBITDAX/(2)/ 10.4 8.5 8.5 6.4 6.8 FV/Mcfe/(3)/ of Reserves $ 2.25 $ 1.96 $ 1.66 $ 1.96 $ 1.66 (1) Cash Flow Per Share = Earnings plus deferred taxes, exploration expense, and depletion, depreciation and amortization per share. (2) EBITDAX = Earnings before interest, income taxes, depletion, depreciation, and amortization and exploration expense. (3) Mcfe = Thousand cubic feet of gas equivalent. (4) Source of estimates: Viper Base Case hereinafter refers to Viper management's Base Case financial plan updated as of May 1, 2000 using First Call price deck as of May 15, 2000. (5) Source of estimates: Viper Base Case using NYMEX strip as of May 15, 2000. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 3 PROJECT VIPER / MAY 23, 2000 2 MARKET UPDATE [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] PROJECT VIPER / MAY 23, 2000 Relative Price Performance Since Boa/Anaconda Announcement DAILY DATA: MAR/26/1999 THROUGH MAY/19/2000 [Graph reflecting historical market price of each of Viper and a Competitor Index, as a percent of the Base Period (March/16/1999), daily, March/16/1999 through May/19/2000, concluding that, as of May 19, 2000: - -------------------------------------- ------------------------------ Price as Percent of Base ------------------------ Period ------ - -------------------------------------- ------------------------------ Competitor Index 164% - -------------------------------------- ------------------------------ Viper 181% - -------------------------------------- ------------------------------ Viper at $83 187%] - -------------------------------------- ------------------------------ Competitor Index: (APC, APA, BRR, BR, XTO, CHK, DVN, EOG, KMG, LD, NFX, NBL, PXD, UCL, UPR) [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 4 PROJECT VIPER / MAY 23, 2000 Enterprise Value Appreciation [Bar graph reflecting the following appreciation of the enterprise value for Vastar and the Competitor Group companies: 2/11/00(1) - 5/19/00 - ------------------------------- ------------------------------ Selected Comparable Company Enterprise Value --------------------------- ---------------- Appreciation (2) ---------------- - ------------------------------- ------------------------------ UPR (4) 63.3% - ------------------------------- ------------------------------ NBL 60.5% - ------------------------------- ------------------------------ EOG 59.9% - ------------------------------- ------------------------------ Viper @ $83 56.3% - ------------------------------- ------------------------------ APC 48.2% - ------------------------------- ------------------------------ APA 40.7% - ------------------------------- ------------------------------ NFX 39.0% - ------------------------------- ------------------------------ DVN 38.7% - ------------------------------- ------------------------------ BR 38.0% - ------------------------------- ------------------------------ LD 36.0% - ------------------------------- ------------------------------ Viper @ $71 35.8% - ------------------------------- ------------------------------ BRR 33.6% - ------------------------------- ------------------------------ XTO 32.4% - ------------------------------- ------------------------------ UCL 25.0% - ------------------------------- ------------------------------ PXD 20.6% - ------------------------------- ------------------------------ CHK 17.6% - ------------------------------- ------------------------------ KMG 14.7% - ------------------------------- ------------------------------ MEAN (3) 37.9%] - ------------------------------- ------------------------------ (1) Date on which federal judge confirmed hearing dates to consider government's request for an injunction of the Boa and Anaconda merger. (2) Enterprise value is defined as fully diluted shares outstanding multiplied by share price, plus debt, preferred, and out-of-the-money convertible preferred, less options proceeds and cash. Balance sheet data as of 12/31/99. (3) Excluding Viper. (4) UPR performance during period driven by announcement of acquisition by Anadarko. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 5 PROJECT VIPER / MAY 23, 2000 Relative Price Performance: Five Years WEEKLY DATA: MAY/19/1995 THROUGH MAY/19/2000 [Graph reflecting historical market price of each of Viper and 60/40 Gas/Oil Blended Spot, as a percent of the Base Period (May/19/2000), weekly, May/19/1995 through May/19/2000, concluding that, as of May 19, 2000: - -------------------------------------- ------------------------------ Price as Percent of Base ------------------------ Period ------ - -------------------------------------- ------------------------------ 60/40 Gas/Oil Blended Spot 199% - -------------------------------------- ------------------------------ Viper 274% - -------------------------------------- ------------------------------ Viper at $83 283%] - -------------------------------------- ------------------------------ [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 6 PROJECT VIPER / MAY 23, 2000 Public Market Trading Comparison - Competitor Group (Dollars in millions, except per share data) - -------------------------------------------------------------------------------------------------------- Price / Firm Value / Price at Equity Firm Cash Flow EBITDAX Firm Value / ------------ ------------- 5/19/00 Value Value 2000E 2001E 2000E 2001E Mcfe - -------------------------------------------------------------------------------------------------------- Anadarko/(1)/ $ 51.25 $12,756 $17,030 8.2x 7.9x 9.1x 9.2x $ 1.46 Apache 58.88 7,143 9,116 6.2 6.3 6.9 7.0 1.88 Barrett Resources 38.75 1,293 1,628 7.6 6.5 8.9 7.7 1.44 Burlington Resources 44.81 9,708 12,439 6.4 6.3 6.7 6.6 1.21 Chesapeake Energy 5.19 539 1,695 3.0 2.8 6.7 6.4 1.41 Cross Timbers 18.06 882 1,996 3.9 3.7 7.0 6.7 0.99 Devon Energy 57.88 4,831 6,451 6.3 6.1 6.8 6.8 1.61 EOG Resources 31.06 3,798 4,863 5.3 5.5 6.3 6.5 2.00 Kerr-McGee 58.75 5,536 7,794 4.2 4.5 4.1 4.5 1.42 Louis Dreyfus 31.88 1,317 1,863 5.5 5.3 6.8 6.6 1.27 Newfield Exploration 43.94 1,925 2,152 6.3 5.6 7.0 6.4 3.62 Noble Affiliates 39.50 2,269 2,711 5.0 4.6 5.1 4.8 1.36 Pioneer Natural Resources 13.31 1,331 3,043 3.7 3.6 6.6 6.5 0.84 Unocal 37.88 9,189 13,186 5.2 5.4 5.5 5.7 1.33 - -------------------------------------------------------------------------------------------------------- High: 8.2x 7.9x 9.1x 9.2x $ 3.62 Median: 5.4 5.4 6.8 6.5 1.41 Low: 3.0 2.8 4.1 4.5 0.84 - -------------------------------------------------------------------------------------------------------- Viper at Offer Price $ 83.00 $8,229 $ 9,164 7.8x 7.8x 8.5x 8.5x $ 2.25 - -------------------------------------------------------------------------------------------------------- Source: SEC filings, First Call Corporation and Viper Base Case with First Call price deck. (1) Pro forma for acquisition of UPR. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 7 PROJECT VIPER / MAY 23, 2000 Public Market Trading Comparison - Competitor Group (cont'd) [Bar graphs reflecting the following: - --------------------------- ----------------------------------------- Firm Value to 2000 EBITDAX: --------------------------- - --------------------------- --------------------- ------------------- March 24, 2000 May 19, 2000 -------------- ------------ - --------------------------- --------------------- ------------------- APC 9.7x 9.1x - --------------------------- --------------------- ------------------- APA 5.6x 6.9x - --------------------------- --------------------- ------------------- BRR 7.2x 8.9x - --------------------------- --------------------- ------------------- BR 6.0x 6.7x - --------------------------- --------------------- ------------------- CHK 6.0x 6.7x - --------------------------- --------------------- ------------------- XTO 6.2x 7.0x - --------------------------- --------------------- ------------------- DVN 5.1x 6.8x - --------------------------- --------------------- ------------------- EOG 5.0x 6.3x - --------------------------- --------------------- ------------------- KMG 5.1x 4.1x - --------------------------- --------------------- ------------------- LD 6.5x 6.8x - --------------------------- --------------------- ------------------- NFX 5.5x 7.0x - --------------------------- --------------------- ------------------- NBL 4.4x 5.1x - --------------------------- --------------------- ------------------- PXD 6.2x 6.6x - --------------------------- --------------------- ------------------- UCL 5.0x 5.5x - --------------------------- --------------------- ------------------- Viper at $71 7.4x - --------------------------- ----------------------------------------- Viper at $83 8.5x - --------------------------- ----------------------------------------- - --------------------------- ----------------------------------------- Price to 2000 Cash Flow ----------------------- - --------------------------- ----------------------------------------- March 24, 2000 May 19, 2000 -------------- ------------ - --------------------------- --------------------- ------------------- APC 10.1x 8.2x - --------------------------- --------------------- ------------------- APA 5.0x 6.2x - --------------------------- --------------------- ------------------- BRR 6.0x 7.6x - --------------------------- --------------------- ------------------- BR 5.4x 6.4x - --------------------------- --------------------- ------------------- CHK 1.6x 3.0x - --------------------------- --------------------- ------------------- XTO 2.8x 3.9x - --------------------------- --------------------- ------------------- DVN 5.1x 6.3x - --------------------------- --------------------- ------------------- EOG 3.9x 5.3x - --------------------------- --------------------- ------------------- KMG 4.1x 4.2x - --------------------------- --------------------- ------------------- LD 5.1x 5.5x - --------------------------- --------------------- ------------------- NFX 5.2x 6.3x - --------------------------- --------------------- ------------------- NBL 3.9x 5.0x - --------------------------- --------------------- ------------------- PXD 2.9x 3.7x - --------------------------- --------------------- ------------------- UCL 4.2x 5.2x - --------------------------- --------------------- ------------------- Viper at $71 6.7x - --------------------------- ----------------------------------------- Viper at $83 7.8x] - --------------------------- ----------------------------------------- [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 8 PROJECT VIPER / MAY 23, 2000 3 VALUATION MATERIALS [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] PROJECT VIPER / MAY 23, 2000 Historical Operating and Financial Performance ------------------------------------------------------------------------------------------------------------------ 1995 1996 1997 1998 1999 CAGR '95-'99 ------------------------------------------------------------------------------------------------------------------ Production (Bcfe) /(1)/ 395 426 433 471 525 7.4% End of Year Reserves (Bcfe) 2,725 2,916 3,153 3,700 4,074 10.6 Reserve Replacement Rate /(2)/ 143% 144% 154% 215% 170% Total Capital Program ($MM) /(3)/ $ 442 $ 567 $ 672 $ 1,133 $ 664 10.7% Reserve Replacement Cost ($/Mcfe) $ 0.80 $ 0.93 $ 1.02 $ 1.11 $ 0.71 Revenues ($MM) $ 740 $ 967 $ 1,014 $ 941 $ 1,176 12.3% EBITDAX 528 727 747 674 878 13.6 Cash Flow per Share $ 4.93 $ 6.94 $ 7.96 $ 7.55 $ 9.01 16.3% Earnings per Share 1.05 2.26 2.46 1.39 2.16 19.8 (1) Bcfe = billions of cubic feet gas equivalent, or 1,000,000 Mcfe. (2) Reserve replacement rate equals the ratio of reserve additions to production. (3) Total capital program equals exploratory and development drilling, property acquisitions, geologic and geophysical and other additions. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 9 PROJECT VIPER / MAY 23, 2000 Projected Operating and Financial Performance BASE PLAN WITH NYMEX PRICE DECK ------------------------------------------------------------------------------------------------------------------------- 1999 2000 2001 2002 2003 2005 2009 CAGR '99-'09 ------------------------------------------------------------------------------------------------------------------------- Production (Bcfe) 525 547 582 631 799 978 1,712 13% End of Year Reserves (Bcfe) 4,074 4,678 5,533 6,435 7,150 8,278 14,772 14 Reserve Replacement Rate 170% 213% 249% 245% 192% 165% 199% Total Capital Program ($MM) $ 664 $ 880 $ 1,197 $ 1,456 $ 1,374 $ 1,859 $ 4,106 20% Reserve Replacement Cost ($/Mcfe) $ 0.71 $ 0.79 $ 0.86 $ 0.97 $ 0.93 $ 1.18 $ 1.22 Revenues ($MM) $ 1,176 $ 1,776 $ 1,714 $ 1,695 $ 2,136 $ 2,702 $ 5,098 16% EBITDAX 878 1,433 1,353 1,311 1,670 2,146 4,168 17 Cash Flow per Share $ 9.01 $ 13.03 $ 12.64 $ 12.99 $ 14.91 $ 18.97 $ 37.82 15% Earnings per Share 2.16 5.41 4.93 3.93 4.67 6.55 12.45 19 Source: Viper Base Case using NYMEX strip as of May 15, 2000. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 10 PROJECT VIPER / MAY 23, 2000 Projected Operating and Financial Performance BASE PLAN WITH LRP PRICE DECK ----------------------------------------------------------------------------------------------------------------------- 1999 2000 2001 2002 2003 2005 2009 CAGR '99-'09 ----------------------------------------------------------------------------------------------------------------------- Production (Bcfe) 525 547 582 631 799 978 1,712 13% End of Year Reserves (Bcfe) 4,074 4,678 5,533 6,435 7,150 8,278 14,772 14 Reserve Replacement Rate 170% 213% 249% 245% 192% 165% 199% Total Capital Program ($MM) $ 664 $ 880 $ 1,197 $ 1,456 $ 1,374 $ 1,859 $ 4,106 20% Reserve Replacement Cost ($/Mcfe) $ 0.71 $ 0.79 $ 0.86 $ 0.97 $ 0.93 $ 1.18 $ 1.22 Revenues ($MM) $ 1,176 $ 1,251 $ 1,306 $ 1,431 $ 1,915 $ 2,485 $ 4,902 15% EBITDAX 878 927 958 1,056 1,457 1,937 3,978 16 Cash Flow per Share $ 9.01 $ 9.62 $ 9.80 $ 10.61 $ 13.03 $ 17.26 $ 35.29 15% Earnings per Share 2.16 2.10 2.21 1.99 2.92 4.70 10.39 17 Source: Viper Base Plan with LRP Price Deck. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 11 PROJECT VIPER / MAY 23, 2000 Valuation Approaches . Salomon Smith Barney and Petrie Parkman have performed analyses of Viper using various customary methodologies . Most of the methodologies employed by the financial advisors were very similar and yielded similar results ----------------------------------------------------------------------------------------------------------------------------- Methodology Description ----------------------------------------------------------------------------------------------------------------------------- Public Market Trading Comparison of Viper performance and asset multiples with corresponding multiples Comparison (SSB) and Capital for a selected universe of publicly-traded independent oil & gas companies Market Comparison (PPC) ----------------------------------------------------------------------------------------------------------------------------- Property Transactions Comparison of Viper's assets with precedent oil and gas property transactions on Analysis (PPC) a regional basis ----------------------------------------------------------------------------------------------------------------------------- Precedent Corporate Comparison of Viper performance and asset multiples with precedent corporate Transactions (SSB) and and offers for control involving companies in the independent oil and gas Company Transaction Analysis sector (PPC) ----------------------------------------------------------------------------------------------------------------------------- Discounted Cash Flow Asset-focused assessment of Viper's existing inventory of producing, non- Analysis (PPC) producing, and other assets. Various sensitivities were also performed on the projected financial results ----------------------------------------------------------------------------------------------------------------------------- Going Concern DCF Analysis Equity-focused assessment based on projections of full financial statements for (SSB & PPC) Viper as a going concern entity assuming reinvestment of free cash flow and a capitalization of a terminal value at the end of the evaluation period. Various sensitivities were also performed on the projected financial results ----------------------------------------------------------------------------------------------------------------------------- [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 12 PROJECT VIPER / MAY 23, 2000 SSB Valuation Summary [Bar graph reflecting the following information: - ------------------------------------------------------------ ----------------------------------- 52-Week Trading Range (Prior to Initial Offer) $41 - $70 - ------------------------------------------------------------ ----------------------------------- Public Market Trading Comparison - Competitor Group $70 - $76 - ------------------------------------------------------------ ----------------------------------- Public Market Trading Comparison - Regional Pure Plays $68 - $74 - ------------------------------------------------------------ ----------------------------------- Precedent Corporate Transactions $71 - $81 - ------------------------------------------------------------ ----------------------------------- Going Concern DCF Analysis (1) $80 - $95] - ------------------------------------------------------------ ----------------------------------- (1) SSB Going Concern DCF reference range is based upon Viper Base Case using both LRP and NYMEX pricing scenarios, various operating sensitivities, terminal multiples of 6.25x to 6.75x estimated 2009 EBITDAX and discount rates of 9.5% to 10.5%. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 13 PROJECT VIPER / MAY 23, 2000 PPC Valuation Summary [Bar graph reflecting the following information: - ------------------------------------------------------------ ----------------------------------- DCF Analysis $53 - $68 - ------------------------------------------------------------ ----------------------------------- Property Transactions Analysis $46 - $59 - ------------------------------------------------------------ ----------------------------------- Company Transaction Analysis $70 - $80 - ------------------------------------------------------------ ----------------------------------- Capital Market Comparison $70 - $76 - ------------------------------------------------------------ ----------------------------------- Going Concern DCF Analysis - Debt Paydown Case (1) $75 - $85 - ------------------------------------------------------------ ----------------------------------- Going Concern DCF Analysis - Tactical Acquisition Case (1) $80 - $90] - ------------------------------------------------------------ ----------------------------------- (1) Analysis based upon Viper Base Case with Entrada projections for Proved, Accretion, Probable, Possible, and non-Deepwater Exploration, and PPC 30-Prospect Deepwater projections for Deepwater assets. Reference value range based upon a terminal multiple of 1.9x to 2.1x estimated 2009 SEC value, with derived equity value discounted at a 15.0% equity rate of return. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 14 PROJECT VIPER / MAY 23, 2000 4 PRECEDENT MINORITY SQUEEZE-OUT PREMIUMS [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] PROJECTED VIPER / MAY 23, 2000 Precedent Minority Squeeze-Outs Premium to Market Acquiror's --------------------------------------------- Holdings at Number of One Month One Day Time of Offer Transactions Before Initial Offer Before Initial Offer - ------------------------------------------------------------------------------------------------ 50.1% - 79.9% 32 High 101.7% 100.0% Mean 37.6% 29.5% Median 30.9% 23.8% Low -5.9% -17.8% 80.0% + 13 High 54.5% 43.7% Mean 22.2% 17.5% Median 21.5% 19.4% Low 1.1% 0.0% - ------------------------------------------------------------------------------------------------ All Transactions 45 High 101.7% 100.0% Mean 33.2% 26.0% Median 29.2% 19.9% Low -5.9% -17.8% - ------------------------------------------------------------------------------------------------ - ------------------------------------------------------------------------------------------------ Viper Price $52.19 $63.13 Viper Premium @ Initial Offer 36.0% 12.5% Viper Premium @ May 19 Offer 59.0% 31.5% - ------------------------------------------------------------------------------------------------ NB: Genetics Institute / American Home Products transaction dated 12/17/96 excluded due to distorted premium caused by call price agreement. Source: Securities Data Company, May 2000. Includes cash transactions, greater than $100 million since 1988 where acquiror owned more than 50% of target before the transaction. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 15 PROJECT VIPER / MAY 23, 2000 APPENDIX [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] PROJECT VIPER / MAY 23, 2000 A. Salomon Smith Barney Valuation Analysis [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] PROJECT VIPER / MAY 23, 2000 Public Market Trading Comparison Valuation - Competitor Group (Dollars in millions, except per share data) - ------------------------------------------------------------------------------------------------ Firm Value to ------------------------------------------------------------ 2000E 2001E EBITDAX EBITDAX - ------------------------------------------------------------------------------------------------ Viper Statistic (1) $1,075 $1,076 Relevant Multiple Range 7.0x -- 8.0x 6.5x -- 7.5x ------------------------ --------------------------- Implied Firm Value $7,523 $8,598 $6,996 $8,073 Less Net Debt and Option Proceeds 838 838 ------------------------ --------------------------- Implied Equity Value $6,685 -- $7,760 $6,159 -- $7,235 Fully Diluted Shares 100.3 100.3 Implied Equity Value per Share $66.65 -- $77.36 $61.40 -- $72.13 - ----------------------------------------------------------------------------------------------------------------------------------- Selected Preliminary Reference Range $70.00 -- $76.00 - ----------------------------------------------------------------------------------------------------------------------------------- - ----------------------------------------------------------------------------------------------------------------------------------- Equity Value to Firm Value to --------------------------------------- 2000E 2001E Reserves Cash Flow Cash Flow - ----------------------------------------------------------------------------------------------------------------------------------- Viper Statistic (1) $1,049 $1,055 4,074 Bcfe Relevant Multiple Range 6.5x -- 7.5x 6.0x -- 7.0x $ 1.50 -- $ 2.00 / Mcfe ------------------------- -------------------------- --------------------------------------- Implied Firm Value n/a n/a $6,111 $8,148 Less Net Debt and Option Proceeds n/a n/a 838 ------------------------- -------------------------- --------------------------------------- Implied Equity Value $6,820 -- $7,869 $6,331 -- $7,386 $5,273 -- $7,310 Fully Diluted Shares 100.3 100.3 100.3 Implied Equity Value per Share $67.99 -- $78.45 $63.11 -- $73.63 $52.57 -- $72.88 - ----------------------------------------------------------------------------------------------------------------------------------- Selected Preliminary Reference Range - ----------------------------------------------------------------------------------------------------------------------------------- Source: Viper Base Case with First Call price deck. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 16 PROJECT VIPER / MAY 23, 2000 Public Market Trading Comparison - Competitor Group (Dollars in millions, except per share data) - -------------------------------------------------------------------------------------------------------- Price / Firm Value / Price at Equity Firm Cash Flow EBITDAX Firm Value / ----------- ------------ 5/19/00 Value Value 2000E 2001E 2000E 2001E Mcfe - -------------------------------------------------------------------------------------------------------- Anadarko /1/ $ 51.25 $12,756 $17,030 8.2x 7.9x 9.1x 9.2x $ 1.46 Apache 58.88 7,143 9,116 6.2 6.3 6.9 7.0 1.88 Barrett Resources 38.75 1,293 1,628 7.6 6.5 8.9 7.7 1.44 Burlington Resources 44.81 9,708 12,439 6.4 6.3 6.7 6.6 1.21 Chesapeake Energy 5.19 539 1,695 3.0 2.8 6.7 6.4 1.41 Cross Timbers 18.06 882 1,996 3.9 3.7 7.0 6.7 0.99 Devon Energy 57.88 4,831 6,451 6.3 6.1 6.8 6.8 1.61 EOG Resources 31.06 3,798 4,863 5.3 5.5 6.3 6.5 2.00 Kerr-McGee 58.75 5,536 7,794 4.2 4.5 4.1 4.5 1.42 Louis Dreyfus 31.88 1,317 1,863 5.5 5.3 6.8 6.6 1.27 Newfield Exploration 43.94 1,925 2,152 6.3 5.6 7.0 6.4 3.62 Noble Affiliates 39.50 2,269 2,711 5.0 4.6 5.1 4.8 1.36 Pioneer Natural Resources 13.31 1,331 3,043 3.7 3.6 6.6 6.5 0.84 Unocal 37.88 9,189 13,186 5.2 5.4 5.5 5.7 1.33 - -------------------------------------------------------------------------------------------------------- High: 8.2x 7.9x 9.1x 9.2x $ 3.62 Median: 5.4 5.4 6.8 6.5 1.41 Low: 3.0 2.8 4.1 4.5 0.84 - -------------------------------------------------------------------------------------------------------- Viper at Offer Price $ 83.00 $ 8,229 $ 9,164 7.8x 7.8x 8.5x 8.5x $ 2.25 - -------------------------------------------------------------------------------------------------------- Source: SEC filings, First Call Corporation and Viper Base Case with First Call price deck. (1) Pro forma for acquisition of UPR. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 17 PROJECT VIPER / MAY 23, 2000 Public Market Trading Comparison Valuation - Regional Pure Plays (Dollars in millions, except per share data) - ---------------------------------------------------------------------------------------------------------------------------------- Firm Value to Equity Value to ----------------------------------------- --------------------------------------------- 2000E 2001E 2000E 2001E EBITDAX EBITDAX Cash Flow Cash Flow - ---------------------------------------------------------------------------------------------------------------------------------- Viper Statistic (1) $1,075 $1,076 $1,049 $1,055 - ---------------------------------------------------------------------------------------------------------------------------------- Relevant Multiple Range GOM/Gulf Coast 6.5x -- 7.5x 6.0x -- 7.0x 6.0x -- 7.0x 5.5x -- 6.5x On-Shore 6.5x -- 7.0x 6.0x -- 6.5x 5.5x -- 6.5x 5.5x -- 6.5x Rockies 8.0x -- 9.0x 7.0x -- 8.0x 7.0x -- 8.0x 6.5x -- 7.5x - ---------------------------------------------------------------------------------------------------------------------------------- Relative Weight GOM/Gulf Coast 61% 61% 57% 61% On-Shore 20% 19% 18% 15% Rockies 19% 20% 25% 24% Blended Multiple Range (2) 6.8x -- 7.7x 6.2x -- 7.1x 6.2x -- 7.2x 5.7x -- 6.7x Implied Firm Value $7,295 $8,264 $6,674 $7,649 n/a n/a Less Net Debt and Option Proceeds 838 838 n/a n/a ----------------------- ----------------------- -------------------- ---------------------- Implied Equity Value $6,457 -- $7,426 $5,836 -- $6,811 $6,463 -- $7,513 $6,059 -- $7,121 Fully Diluted Shares 100.3 100.3 100.3 100.3 Implied Equity Value per Share $64.37 -- $74.04 $58.18 -- $67.90 $64.44 -- $74.90 $60.41 -- $70.99 - ---------------------------------------------------------------------------------------------------------------------------------- Selected Preliminary Reference Range $68.00 -- $74.00 - ---------------------------------------------------------------------------------------------------------------------------------- (Dollars in millions, except per share data) - ---------------------------------------------------------------- Firm Value to Reserves - ------------------------------------------------------------------ Viper Statistic (1) 4,074 Bcfe - ------------------------------------------------------------------ Relevant Multiple Range GOM/Gulf Coast $2.50 -- $3.00 On-Shore $1.25 -- $1.75 Rockies $1.10 -- $1.35 - ------------------------------------------------------------------ Relative Weight GOM/Gulf Coast 58% On-Shore 21% Rockies 20% Blended Multiple Range (2) $1.95 -- $2.40 Implied Firm Value $7,945 $9,778 Less Net Debt and Option Proceeds 838 ----------------------------- Implied Equity Value $7,108 -- $8,940 Fully Diluted Shares 100.3 Implied Equity Value per Share $70.86 -- $89.13 - ------------------------------------------------------------------ Selected Preliminary Reference Range - ------------------------------------------------------------------ (1) Viper Base Case with First Call price deck. (2) Weighted by contribution to EBITDAX, cash flow and reserves as per reported and projected figures. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 18 PROECT VIPER / MAY 23, 2000 Public Market Trading Comparison - Regional Pure Plays (Dollars in millions, except per share data) - -------------------------------------------------------------------------------------------------------------------------- Price / Firm Value / Firm Price at Equity Firm Cash Flow EBITDAX Value / ---------------- ---------------- Company 5/19/00 Value Value 2000E 2001E 2000E 2001E Mcfe - -------------------------------------------------------------------------------------------------------------------------- GOM / Gulf Coast - ---------------- Basin Exploration $ 17.44 $ 329 $ 359 4.1x 3.8x 4.5x 4.2x $ 1.71 Chieftain Int'l 21.69 358 416 5.7 5.0 6.6 5.9 1.74 Stone Energy 58.56 1,118 1,204 7.0 6.3 7.3 6.6 3.11 Newfield Exploration 43.94 1,925 2,152 6.3 5.6 7.0 6.4 3.62 Houston Exploration 22.50 665 930 4.1 3.6 5.5 4.9 1.72 Meridian Resources 4.81 226 780 2.6 2.9 7.2 7.7 2.14 - -------------------------------------------------------------------------------------------------------------------------- Median: $ 511 $ 855 4.9x 4.4x 6.8x 6.1x $ 1.94 On-Shore - -------- Chesapeake Energy $ 5.19 $ 539 $ 1,695 3.0x 2.8x 6.7x 6.4x $ 1.41 Louis Dreyfus 31.88 1,317 1,863 5.5 5.3 6.8 6.6 1.27 EOG Resources 31.06 3,798 4,863 5.3 5.5 6.3 6.5 2.00 Burlington Resources 44.81 9,708 12,439 6.4 6.3 6.7 6.6 1.21 Noble Affiliates 39.50 2,269 2,711 5.0 4.6 5.1 4.8 1.36 - -------------------------------------------------------------------------------------------------------------------------- Median: $2,269 $ 2,711 5.3x 5.3x 6.7x 6.5x $ 1.36 Rockies - ------- Patina Oil & Gas $ 16.50 $ 298 $ 488 4.2x 4.2x 6.5x 6.5x $ 1.05 Barrett Resources 38.75 1,293 1,628 7.6 6.5 8.9 7.7 1.44 HS Resources 27.38 535 1,067 3.2 2.8 5.2 4.7 0.96 Evergreen Resources 23.88 356 371 16.5 11.4 15.8 11.2 0.66 Tom Brown 20.63 780 873 7.4 7.1 8.6 8.1 1.67 - -------------------------------------------------------------------------------------------------------------------------- Median: $ 535 $ 873 7.4x 6.5x 8.6x 7.7x $ 1.05 - -------------------------------------------------------------------------------------------------------------------------- Viper at Offer Price $ 83.00 $8,229 $ 9,164 7.8x 7.8x 8.5x 8.5x $ 2.25 - -------------------------------------------------------------------------------------------------------------------------- Source: SEC filings, First Call Corporation and Viper Base Case with First Call price deck. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 19 PROJECT VIPER / MAY 23, 2000 Precedent Corporate Transactions Valuation (Dollars in millions, except per unit data) - ----------------------------------------------------------------------------------------------------------------------------------- Firm Value to Equity Value to Firm Value to ---------------------------------------------- --------------------- 1999A 2000E 2000E Reserves EBITDAX EBITDAX Cash Flow (Bcfe) - ----------------------------------------------------------------------------------------------------------------------------------- Viper Statistic (1) $878 $1,075 $1,049 4,074 Relevant Multiple Range 8.5x -- 9.5x 7.5x -- 8.5x 7.0x -- 8.0x $1.25 -- $2.00 ---------------------- ---------------------- ------------------ --------------------- Implied Firm Value $7,460 -- $8,338 $8,060 -- $9,135 n/a $5,093 -- $8,148 Less Net Debt and Option Proceeds 838 838 n/a 838 ---------------------- ---------------------- -------------------- -------------------- Implied Equity Value $6,623 -- $7,500 $7,223 -- $8,297 $7,344 -- $8,394 $4,255 -- $7,310 Fully Diluted Shares 100.3 100.3 100.3 100.3 Implied Equity Value per Share $66.03 -- $74.78 $72.01 -- $82.72 $73.22 -- $83.68 $42.42 -- $72.88 - -------------------------------------------------------------------------------------------------------------------------------- --- Selected Preliminary Reference Range $71.00 -- $81.00 - -------------------------------------------------------------------------------------------------------------------------------- --- (1) Viper Base Case with First Call price deck. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 20 PROJECT VIPER / MAY 23, 2000 Precedent Corporate Transactions (Dollars in millions, except per Mcfe data) - --------------------------------------------------------------------------------------------------------- Date Acquiror Target Transaction Equity Premium ----------------- Announced Value Value 1 Day 30 Days - ---------------------------------------------------------------------------------------------------------- 3-Apr-00 Anadarko Petroleum Union Pacific Resources $ 7,911 $ 4,435 21.4 % 73.8 % 16-Aug-99 Burlington Resources Inc. Poco Petroleums Ltd. 2,594 1,779 25.1 39.1 9-Jun-99 Norsk Hydro ASA/Statoil Saga Petroleum ASA 4,299 2,600 58.8 71.9 20-May-99 Devon Energy Corp. PennzEnergy Company 1,964 725 (3.6) 42.7 4-May-99 LASMO plc Monument Oil and Gas plc 1,197 963 35.3 55.3 15-Oct-98 Kerr-McGee Corp. Oryx Energy Company 3,437 1,800 50.6 23.7 29-May-98 USX-Marathon Group Tarragon Oil & Gas Ltd. 1,060 677 38.9 46.0 4-May-98 Atlantic Richfield Company Union Texas Petroleum 3,621 2,500 41.5 41.5 26-Jan-98 Union Pacific Resources Norcen Energy Resources 3,635 2,606 29.4 29.4 23-Dec-97 Ocean Energy, Inc. United Meridian Corp. 1,322 1,109 (13.9) (15.7) 23-Nov-97 Sonat Inc. Zilkha Energy Company 1,264 na na na 17-Jul-97 Burlington Resources Inc. Louisiana Land & Exploration 3,075 2,553 20.8 36.3 7-Apr-97 Parker & Parsley Petroleum MESA Inc. 2,166 1,303 (9.5) (11.9) - --------------------------------------------------------------------------------------------------------- High: $7,911 $4,435 58.8 % 73.8 % Medium: $2,594 $1,790 27.2 % 40.3 % Low: $1,060 $ 677 (13.9)% (15.7)% - --------------------------------------------------------------------------------------------------------- Viper at Offer Price $9,164 $8,229 31.5 % 59.0 % - --------------------------------------------------------------------------------------------------------- - ------------------------------------------------------------------------------------------------------------------------ Transaction Value to Equity Firm ----------------------- Date Acquiror Target LTM FWD Value/ Value/ Announced EBITDAX EBITDAX FWD CF Mcfe - ------------------------------------------------------------------------------------------------------------------------ 3-Apr-00 Anadarko Petroleum Union Pacific Resources 6.4x 5.5x 3.8x $ 1.00 16-Aug-99 Burlington Resources Inc. Poco Petroleums Ltd. 10.3 8.2 7.3 1.36 9-Jun-99 Norsk Hydro ASA/Statoil Saga Petroleum ASA 8.1 5.9 na 0.87 20-May-99 Devon Energy Corp. PennzEnergy Company 3.7 9.3 4.7 0.91 4-May-99 LASMO plc Monument Oil and Gas plc 14.2 1.9 2.9 1.23 15-Oct-98 Kerr-McGee Corp. Oryx Energy Company 6.0 5.7 3.7 0.93 29-May-98 USX-Marathon Group Tarragon Oil & Gas Ltd. 10.2 10.1 9.4 0.89 4-May-98 Atlantic Richfield Company Union Texas Petroleum 7.2 6.8 8.9 1.07 26-Jan-98 Union Pacific Resources Norcen Energy Resources 5.4 8.6 6.3 1.25 23-Dec-97 Ocean Energy, Inc. United Meridian Corp. 7.0 7.1 6.8 1.36 23-Nov-97 Sonat Inc. Zilkha Energy Company na na na 3.04 17-Jul-97 Burlington Resources Inc. Louisiana Land & Exploration 7.0 7.1 6.7 1.09 7-Apr-97 Parker & Parsley Petroleum MESA Inc. 10.1 6.8 5.8 1.17 - ---------------------------------------------------------------------------------------------------------------------- 14.2x 10.1x 9.4x $ 3.04 7.1x 7.0x 6.3x $ 1.09 3.7x 1.9x 2.9x $ 0.87 - ---------------------------------------------------------------------------------------------------------------------- Viper at Offer Price 10.4x 8.5x 7.8x $ 2.25 - ---------------------------------------------------------------------------------------------------------------------- Source: Herold's M&A Database, Securities Data Corp, Investext Research Reports, Bloomberg LLP, Factset/IDD, Company SEC filings and Viper Base Case with First Call price deck to provide comparability to public company trading estimates. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 21 PROJECT VIPER / MAY 23, 2000 Summary of Going-Concern DCF Analysis PRICE SENSITIVITES . Base Case - LRP Pricing: management's projections using the LRP projected commodity prices . Base Case - NYMEX Pricing: management's projections using the NYMEX strip as of 5/15/00 for oil through 2006 and gas through 2003 and escalating at 2% thereafter OPERATING SENSITIVITES . Opportunity and accretion wedge scale: assumed that management's projected opportunity and deepwater accretion wedges are only 50% as large as projected in the Viper Base Case . Reserve Sensitivity: reduced annual deepwater exploration and accretion wedge reserves, production and EBITDAX by 10% while leaving capital unchanged to represent a sensitivity in the total deepwater reserve find . Capital Sensitivity: increased deepwater exploration wedge capital by 33% while holding expected production and EBITDAX at Viper Base Case levels to represent finding cost sensitivity . Entrada Sensitivity: Entrada standalone value (100% success rate) added to Base Case scenario (adjusted to exclude risk-weighted Entrada prospect) [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 22 PROJECT VIPER / MAY 23, 2000 Going-Concern DCF Analysis: Viper Base Plan [Bar Graph reflecting the following information: - ----------------------------------------------------- -------------------------------------------------------------------- WACC range of 9.5% to 10.5% and terminal EBITDAX multiple range of 6.25x to 6.75x - ----------------------------------------------------- --------------------------------- ---------------------------------- LRP price deck NYMEX price deck, top end of range - ----------------------------------------------------- --------------------------------- ---------------------------------- Viper Base Case $80 - $97 $113 - ----------------------------------------------------- --------------------------------- ---------------------------------- Opportunity and Accretion Wedge Scale Sensitivity (1) $70 - $84 $97 - ----------------------------------------------------- --------------------------------- ---------------------------------- Reserve Sensitivity (2) $60 - $83 $100 - ----------------------------------------------------- --------------------------------- ---------------------------------- Capital Sensitivity (3) $72 - $89 $106 - ----------------------------------------------------- --------------------------------- ---------------------------------- Entrada Sensitivity (4) $84 - $102 $118 - ----------------------------------------------------- --------------------------------- ---------------------------------- (1) Deepwater accretion and opportunity wedges scaled down by a factor of 50%. (2) Deepwater exploration and accretion wedge reserves, production and EBITDAX reduced by 10%. Total capital unchanged. (3) Deepwater capital costs increased by 33%. Total reserves unchanged. (4) Entrada standalone value (100% success rate) added to Base Case scenario (adjusted to exclude risk-weighted Entrada prospect).] [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 23 PROJECT VIPER / MAY 23, 2000 B. Petrie Parkman & Co. Valuation Analysis [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] PROJECT VIPER / MAY 23, 2000 Petrie Parkman & Co. Benchmark Pricing Cases [Graphs reflecting PP & Co. Benchmark Oil Price Forecast ($/Bb1) and PP & Co. Benchmark Gas Price Forecast ($MMBtu), summarized as follows:] ========================================================================================================================= PP&Co. Benchmark Oil Price Forecast ($/Bbl) PP&Co. Benchmark Gas Price Forecast ($/MMBtu) Pricing Case 2000 2001 2002 2003 2004 2000 2001 2002 2003 2004 - ---------------- ---------------------------------------------- ------------------------------------------------- Pricing Case I $21.25 $17.51 $18.04 $18.58 $19.13 $2.50 $2.37 $2.44 $2.51 $2.59 Pricing Case II $22.49 $19.57 $20.16 $20.76 $21.38 $2.62 $2.58 $2.65 $2.73 $2.81 Pricing Case III $24.35 $22.66 $23.34 $24.04 $24.76 $2.75 $2.78 $2.86 $2.95 $3.04 Strip Pricing $28.54 $24.48 $21.52 $19.40 $19.08 $3.48 $3.40 $3.06 $2.96 $3.05 Adjustments were made to the above benchmarks based on the historical relationship between the benchmarks and Viper's realized prices. Note: Strip Price as of 5/19/00. Year 2000 Prices = blended prices utilizing actual prices through 5/19/00 and $17, $19, and $22 oil and $2.30, $2.50 and $2.70 gas prices for Cases I, II and III, respectively. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 24 Summary of Analyses PROJECT VIPER / MAY 23, 2000 [Bar graph reflecting the Equity Reference Value Range ($/sh) implied by various valuation methodologies, summarized by the following table.] Methodology DCF Analysis Property Transaction Company Transaction Capital Market Going Concern Analysis- Going Concern Analysis- Analysis Analysis Comparison Debt Paydown Case Tactical Acquisition Case $68.00 $59.04 $79.71 $75.72 $85.00 $90.00 $53.00 $45.87 $69.74 $69.74 $75.00 $80.00 [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 25 PROJECT VIPER / MAY 23, 2000 Discounted Cash Flow Analysis ==================================================================================================================================== Reference Value Ranges - Non Stepped-Up Analysis ($MM) -------------------------------------------------------------------------------------- Pricing Case I Pricing Case II Pricing Case III Strip Pricing -------------------------------------------------------------------------------------- Proved Reserves PDP/1/ (8.0 - 10.0%) $1,750 - $1,889 $1,902 - $2,055 $2,077 - $2,245 $2,264 - $2,431 PDNP/2/ (10.0 - 12.5%) 295 - 325 326 - 358 363 - 399 370 - 404 PUD/3/ (12.5 - 15.0%) 328 - 411 451 - 548 616 - 733 519 - 613 -------------------- ----------------- ------------------ ----------------- Total Proved Reserves $2,373 - $2,625 $2,678 - $2,961 $3,056 - $3,377 $3,153 - $3,449 Accretion Reserves/3/ (12.5 - 15.0%) 176 - 244 232 - 312 295 - 388 266 - 354 Probables/4/ (15.0 - 20.0%) 241 - 392 312 - 487 400 - 606 332 - 503 Possibles/5/ (20.0 - 25.0%) 277 - 433 356 - 539 459 - 677 337 - 514 Deepwater Exploration/6/ (15.0 - 17.5%) 720 - 1,427 1,211 2,086 1,926 3,044 798 1,531 Other Exploration/5/ (20.0 - 25.0%) 16 - 72 58 - 134 111 - 223 138 - 245 -------------------- ----------------- ------------------ ----------------- Total Reserves $3,802 - $5,192 $4,847 - $6,519 $6,247 - $8,316 $5,024 - $6,596 Cogen Margin/2/ 36 - 42 22 - 26 7 - 10 (11) - (8) Tax Credits/1/ 235 - 241 235 - 241 235 - 241 235 - 241 Equity in Earnings of Affiliate/7/ 138 - 147 138 - 147 138 - 147 138 - 147 Seismic/8/ 133 - 265 133 - 265 133 - 265 133 - 265 Fee Lands/9/ 98 - 122 98 - 122 98 - 122 98 - 122 Hedging/1/ (1) - (1) (2) - (2) (6) - (6) (17) - (17) Balance Sheet Adjustment/10/ (64) - (64) (64) - (64) (64) - (64) (64) - (64) G&A/11/ (162) - (145) (162) - (145) (162) - (145) (162) - (145) -------------------- ----------------- ------------------ ----------------- Enterprise Reference Value Range $4,213 - $5,799 $5,243 - $7,109 $6,624 - $8,886 $5,373 - $7,136 Less: Long Term Debt at 3/31/00 (940) - (940) (940) - (940) (940) - (940) (940) - (940) -------------------- ----------------- ------------------ ----------------- Equity Reference Value Range $3,273 - $4,859 $4,303 - $6,169 $5,685 - $7,946 $4,433 - $6,196 Equity Reference Value Range - $/Share/12/ $32.63 - $48.44 $42.90 - $61.50 $56.67 - $79.22 $44.19 - $61.78 - ---------------------------------------------------------------------------------------------------------------------------------- Composite Equity Reference Value Range $53.00 - $68.00 - ---------------------------------------------------------------------------------------------------------------------------------- (1) Based on the NPV of after-tax cash flows using discount rates of 8.0 -10.0%. (2) Based on the NPV of after-tax cash flows using discount rates of 10.0 - 12.5%. (3) Based on the NPV of after-tax cash flows using discount rates of 12.5 - 15.0%. (4) Based on the NPV of after-tax cash flows using discount rates of 15.0 - 20.0%. (5) Based on the NPV of after-tax cash flows using discount rates of 20.0 - 25.0%. (6) Based on the NPV of after-tax cash flows using discount rates of 15.0 - 17.5%. (7) Based on the NPV of after-tax cash flows using discount rates of 10.0 - 12.5%. Assumes exercise of SCEM put. (8) Based on 50.0 - 100.0% of estimated book value at 3/31/00. (9) Based on the NPV of after-tax cash flows using discount rates of 8.0 - 10.0% assuming $15 MM of annual pre-tax cash flow. (10) Represents current assets (including assumed proceeds received from exercise of options)+ other assets - current liabilities - other liabilities (excluding estimated abandonment liability) as of 3/31/00. (11) Based on the NPV of after-tax G&A expenses using discount rates of 10.0 - 12.5%. (12) Based on 100.3 MM diluted shares outstanding. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 26 PROJECT VIPER / MAY 23, 2000 Discounted Cash Flow Analysis (cont'd) . Petrie Parkman calculated after-tax net cash flows for the reserves using the following assumptions and procedures: . Production and Operating Profile - Production and operating profiles for proved, probable, possible, accretion and other exploration reserve projections were based upon estimates prepared by Viper management and supplied to Petrie Parkman by Viper management. This report (the "Reserve Report") is dated as of 12/31/99. - Production and operating profiles for deepwater exploration reserves were based upon Petrie Parkman's 30 prospect deepwater case developed, in part, through discussions with Viper management. . Currency - All $ figures represent United States dollars. . Product Pricing - Petrie Parkman utilizes four pricing scenarios for West Texas Intermediate ("WTI") equivalent oil and for natural gas (Henry Hub). WTI forecasts are based on current NYMEX WTI spot prices and escalators; gas prices are based on current NYMEX Henry Hub spot prices and escalators. Adjustments were made to the forecasts above to account for quality and for transportation differentials consistent with Viper's historical realized differentials. . Basis Differentials - Based on the Company's realized historical and projected levels. . Cost Escalation - Operating and capital costs were taken from the Reserve Report and then escalated at 3% per annum. . Income Tax Rates - U.S. federal rate = 35%. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 27 PROJECT VIPER / MAY 23, 2000 Property Transaction Analysis ================================================================================================================== Viper Data Transaction Enterprise Reference Measure Bcfe Parameters Value Range ($MM) - ------------------------------------------------------ ------ ----------------- ----------------------- Proved Reserves Gulf of Mexico 1,985 $1.00 - 1.40 $1,985 - 2,779 Mid Continent 876 $0.85 - 1.05 745 - 920 San Juan / Rockies 818 $0.75 - 0.85 614 - 695 Gulf Coast 395 $1.00 - 1.25 395 - 494 ------ ----------------- -------------------- Total 4,074 $0.92 - 1.20 $3,738 4,888 Other Assets: Deepwater Exploration Value Range/1/ $1,165 - 1,165 Seismic Database/2/ 133 - 265 Tax Credits/3/ 235 - 241 Equity in Earnings of Affiliate/4/ 138 - 147 Fee Lands/5/ 98 - 122 -------------------- Enterprise Reference Value Range $5,506 - 6,827 Adjusted for: Long Term Debt at 3/31/00 ($940) - (940) Net Working Capital at 3/31/00 $ 35 - 35 -------------------- Equity Reference Value Range ($MM) $4,601 - 5,922 - --------------------------------------------------------------------------------------------------------------- Equity Reference Value Range - $ per Share/6/ $45.87 - 59.04 - --------------------------------------------------------------------------------------------------------------- (1) Based upon the midpoint of the Discounted Cash Flow Analysis Reference Value Range for Deepwater Exploration using the Strip Pricing Case. (2) Based on 50.0 - 100.0% of estimated book value at 3/31/00. (3) Based on the NPV of after-tax cash flows using discount rates of 8.0 - 10.0%. (4) Based on the NPV of after-tax cash flows using discount rates of 10.0 - 12.5%. Assumes exercise of SCEM put. (5) Based on the NPV of after-tax cash flows using discount rates of 8.0 - 10.0% assuming $15 MM of annual pre-tax cash flow. (6) Based on 100.3 MM diluted shares outstanding. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] - ------------------------------ 28 PROJECT VIPER / MAY 23, 2000 Property Transaction Analysis (cont'd) . Petrie Parkman reviewed publicly-available information related to 105 announced oil and gas property transactions and proprietary information related to 6 oil and gas property transactions between January 1997 and May 2000 in the Gulf of Mexico, Mid Continent, San Juan/Rockies, and Gulf Coast regions to determine the transaction parameters for each region relevant for an analysis of Viper. . The number of transactions reviewed and the range of purchase price of reserves per unit of equivalent proved reserves (6:1 Mcf to Bbl basis) are as follows: ========================================================================================== Gulf of Mid San Juan/ Gulf Mexico Continent Rockies Coast ---------- --------- --------- -------- Number of Transactions 23 33 12 43 Purchase Price of Reserves / Proved Reserves ($/Mcfe) Maximum $1.46 $1.42 $0.86 $1.63 Mean $1.06 $0.79 $0.67 $0.81 Minimum $0.71 $0.40 $0.35 $0.20 [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] - ------------------------------ 29 PROJECT VIPER / MAY 23, 2000 Company Transaction Analysis ================================================================================================================================= Viper Transaction Enterprise Reference Measure Data Parameters Value Range ($MM) - ------------------------------------------------------- ------------- ---------------------- -------------------------- IPPR / Proved Reserves (Bcfe)/1/ 4,074 $1.00 - 1.50 $4,677 - 6,886 IPPR / SEC Value ($MM)/1/ $3,475 2.0 - 2.3x $7,554 - 8,768 Purchase Price / LTM DsCF ($MM)/2/ $1,000 7.5 - 8.5x $8,401 - 9,401 Total Investment / LTM EBITDX ($MM) $ 991 7.5 - 9.0x $7,430 - 8,916 Premium Analysis Premiums - ------------------------------------------------------ --------------------- 1 day prior/3/ $63.13 20% - 30% $8,503 - 9,136 30 days prior/3/ $52.19 30% - 40% $7,710 - 8,234 60 days prior/3/ $55.63 25% - 35% $7,879 - 8,437 ------------------------ Composite Enterprise Reference Value Range $7,900 - 8,900 Adjusted for: Long Term Debt at 3/31/00 ($940)- (940) Net Working Capital at 3/31/00 $ 35 - 35 ------------------------- Equity Reference Value Range ($MM) $6,995 - 7,995 - ------------------------------------------------------------------------------------------------------------------------------ Equity Reference Value Range - $ per Share/4/ $69.74 - 79.71 - ------------------------------------------------------------------------------------------------------------------------------ (1) Enterprise Reference Value Range includes other assets (seismic, tax credits, equity in earnings of affiliates, and fee lands) of $603 MM to $775 MM. (2) Enterprise Reference Value Range adjusted for $940 MM of long term debt and $35 MM of working capital. (3) Viper stock price relative to 3/16/00 (announcement of Boa's initial offer to Viper). (4) Based on 100.3 MM diluted shares outstanding. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] - ------------------------------ 30 PROJECT VIPER / MAY 23, 2000 Company Transaction Analysis (cont'd) ========================================================================================================================== Implied Acquiring Company/ Announcement Total Purchase Price IPPR/ PP/ Total Inv./ ------------------- Target Company Date Investment of Reserves Mcfe SEC Value DsCF EBITDX - ------------------------------------------------------------------------------------------------------------------------- $/Mcfe x x x Anadarko Petroleum Corporation 4/3/00 $7,278 $7,098 $1.24 1.5x 3.8x 6.0x Union Pacific Resources Group Inc. Burlington Resources Inc. 8/16/99 $2,464 $2,438 $1.28 N/A 8.5x 9.5x Poco Petroleums Ltd. Santa Fe Energy Resources, Inc. 1/14/99 $ 623 $ 606 $0.99 2.1x 6.0x 7.9x Snyder Oil Corporation Kerr-McGee 10/15/98 $3,428 $3,370 $0.88 1.6x 3.4x 5.4x Oryx Energy Devon Energy 6/29/98 $ 872 $ 841 $0.87 N/A 5.9x 5.9x Northstar Energy USX-Marathon Group 5/30/98 $1,089 $1,089 $1.10 2.6x 9.0x 11.0x Tarragon Oil & Gas Atlantic Richfield 5/4/98 $3,636 $3,586 $1.06 2.2x 7.5x 7.2x Union Texas Union Pacific Resources 1/26/98 $3,379 $3,099 $0.82 N/A 6.4x 7.2x Norcen Energy Resources Sonat, Inc. 11/24/97 $1,279 $1,268 $3.15 1.8x 9.0x 10.2x Zilkha Energy Burlington Resources Inc. 7/17/97 $2,860 $2,835 $1.74 1.7x 5.8x 8.4x Louisiana Land & Exploration Mesa Inc. 4/7/97 $1,733 $1,733 $0.96 1.0x 6.0x 6.5x Parker & Parsley Petroleum Max $3.15 2.6x 9.0x 11.0x Mean $1.28 1.8x 6.5x 7.7x Median $1.06 1.8x 6.0x 7.2x Min $0.82 1.0x 3.4x 5.4x Premium - Above Stock Price --------------------------------- Day 30 Days 60 Days Prior Prior Prior --------------------------------- Anadarko Petroleum Corporation 21.4% 76.0% 61.9% Union Pacific Resources Group Inc. Burlington Resources Inc. 27.6% 39.3% 42.8% Poco Petroleums Ltd. Santa Fe Energy Resources, Inc. -8.5% 3.6% -17.3% Snyder Oil Corporation Kerr-McGee 50.6% 18.4% 9.5% Oryx Energy Devon Energy 25.6% 42.4% 25.6% Northstar Energy USX-Marathon Group 45.4% 46.2% 46.2% Tarragon Oil & Gas Atlantic Richfield 41.5% 35.3% 41.9% Union Texas Union Pacific Resources 29.4% 28.6% 18.2% Norcen Energy Resources Sonat, Inc. N/A N/A N/A Zilkha Energy Burlington Resources Inc. 20.8% 36.3% 34.0% Louisiana Land & Exploration Mesa Inc. 34.7% 31.4% 23.4% Parker & Parsley Petroleum 50.6% 76.0% 61.9% 28.9% 35.8% 28.6% 28.5% 35.8% 29.8% -8.5% 3.6% -17.3% Notes: PP = Purchase Price of Equity Total Investment = Purchase Price of Equity + Long Term Debt + Preferred Stock + Minority Interest - Working Capital Implied Purchase Price of Reserves = Total Investment - Other Assets - Estimated Value of Undeveloped Acreage (if available) [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 31 PROJECT VIPER / MAY 23, 2000 Capital Market Comparison ================================================================================================================ Viper Transaction Enterprise Reference Measure Data Parameters Value Range ($MM) ---------------------------------------------------- -------- --------------- --------------------- Market Cap / LTM DsCF/1/($MM) $1,000 7.5 - 8.5x $8,401 - 9,401 Market Cap / 2000E DsCF/1/,/2/($MM) $1,015 6.5 - 7.5x $7,503 - 8,518 Market Cap / 2001E DsCF/1/,/2/($MM) $1,081 6.0 - 7.0x $7,391 - 8,472 Enterprise Value / LTM EBITDX($MM) $ 991 8.0 - 9.0x $7,926 - 8,916 Enterprise Value / 2000E EBITDX/2/($MM) $1,100 6.5 - 7.5x $7,150 - 8,250 Enterprise Value / 2001E EBITDX/2/($MM) $1,100 6.5 - 7.5x $7,150 - 8,250 Enterprise Value / 1999 Proved Reserves (Bcfe) 4,074 $1.40 - 2.00 $5,704 - 8,148 Enterprise Value / 12/31/99 SEC Value ($MM) $3,475 1.9 - 2.2x $6,603 - 7,646 --------------------- Enterprise Reference Value Range ($MM) $7,900 - 8,500 Adjusted for: Long Term Debt at 3/31/00 $ (940) - (940) Net Working Capital at 3/31/00 $ 35 - 35 --------------------- Equity Reference Value Range ($MM) $6,995 - 7,595 --------------------------------------------------------------------------------------------------------------- Equity Reference Value Range - $ per Share/3/ $69.74 - 75.72 --------------------------------------------------------------------------------------------------------------- (1) Enterprise Reference Value Range adjusted for $940 MM of long-term debt and $35 MM of working capital. (2) Based on IBES and Petrie Parkman research estimates. (3) Based on 100.3 MM diluted shares outstanding. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 32 PROJECT VIPER / MAY 23, 2000 Capital Market Comparison (cont'd) =========================================================================================================================== Market Value to: Enterprise Value to: ------------------------- ---------------------------------------------- Market DsCF Enterprise EBITDX Proved SEC ------------------------- ---------------------------- Value LTM 2000E 2001E Value LTM 2000E 2001E Reserves Value --------------------------------- --------------------------------------------------------- $MM x x x $MM x x x $/Mcfe x Anadarko Petroleum $6,564 17.9x 12.2x 8.1x $8,312 16.1x 11.3x 8.6x $1.40 1.9x Apache Corp. $6,695 7.6x 6.2x 6.3x $8,896 7.9x 6.4x 6.4x $1.84 2.2x Burlington Resources $9,648 7.3x 6.8x 6.6x $12,253 8.0x 6.6x 6.5x $1.19 1.9x Devon Energy $5,012 6.6x 6.6x 6.4x $8,046 8.6x 8.0x 8.1x $2.00 2.6x EOG $3,646 6.1x 5.5x 5.7x $4,735 6.9x 5.5x 5.8x $1.31 2.0x Newfield $1,860 7.9x 6.4x 5.8x $2,214 8.9x 6.3x 6.0x $3.72 3.1x Noble Affiliates $2,201 6.0x 5.1x 4.8x $2,707 6.0x 5.1x 5.1x $1.36 1.8x Pioneer $1,326 4.2x 3.9x 3.9x $3,069 7.7x 6.4x 6.4x $0.84 1.0x Union Pacific Resources $5,766 4.7x 5.0x 4.9x $8,451 6.4x 5.5x 5.7x $1.48 1.8x Unocal $9,198 6.9x 6.0x 5.6x $12,488 7.0x 5.7x 6.2x $1.26 2.1x Max 17.9x 12.2x 8.1x 16.1x 11.3x 8.6x $3.72 3.1x Mean 7.5x 6.4x 5.8x 8.3x 6.7x 6.5x $1.64 2.0x Median 6.7x 6.1x 5.8x 7.8x 6.4x 6.3x $1.38 2.0x Min 4.2x 3.9x 3.9x 6.0x 5.1x 5.1x $0.84 1.0x Note: Market Value as of 5/19/00. Sources: Company filings, IBES and Petrie Parkman research. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 33 PROJECT VIPER / MAY 23, 2000 Going Concern Analysis . Petrie Parkman has prepared a going-concern analysis for the calendar years 2000-2009 using the following assumptions. Methodology: The reference value range is based upon the NPV of i) projected dividends plus ii) projected 2009 equity value. Projected 2009 equity value was derived from estimates of 2009 enterprise value determined by applying multiples of 1.90x, 2.00x and 2.10x SEC Value ("SEC Value") to projected 2009 SEC Value. Estimated 2009 debt and net working capital were deducted from projected 2009 enterprise value to estimate the 2009 equity value of Viper. Discount Rates: An after-tax discount rate of 15.0%. Viper Projections: 2000 through 2009 operating estimates were based upon Viper Management LRP Case w/Entrada projections for PDP, PDNP, PUD, Accretion, Probable, Possible, and Exploration (except Deepwater Exploration - see below) assets, with excess cash flow used to pay down debt. Two cases were analyzed, a "Debt Repayment Case" and a "Tactical Acquisition Case" in which the principal difference was the assumption that $250 MM of producing properties would be acquired each year in the Tactical Acquisition Case. Deepwater Projections: Based upon PP&Co. DCF analysis assumptions for Viper's Deepwater Exploration program. Acquisition Projections: Assumes $250 MM of producing properties are acquired each year for $1.00 /Mcfe, with the acquisition cost escalated at 3.0% annually. The production and operating profile for the acquired properties was based upon Viper historical results. Oil and Gas Pricing: Based upon PP&Co. Benchmark pricing scenarios I, II, and III and the Strip Case. G&A Expenses: Based upon Viper estimates. [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 34 PROJECT VIPER / MAY 23, 2000 Going Concern Analysis (cont'd) Debt Paydown Case $MM, except per share amounts Terminal Multiple of Year 10 Estimated SEC Value ==================================================================================================================================== Equity Reference Value $MM --------------------------------------------------------------------------------------- Pricing Case I Pricing Case II Pricing Case III Strip Pricing Case ------------------- ------------------- ------------------- -------------------- Terminal Multiple of SEC Value 15.0% 15.0% 15.0% 15.0% 1.90 $7,205 $8,089 $ 9,358 $7,420 2.00 $7,575 $8,505 $ 9,840 $7,800 2.10 $7,944 $8,921 $10,323 $8,181 ==================================================================================================================================== Equity Reference Value $/Share --------------------------------------------------------------------------------------- Pricing Case I Pricing Case II Pricing Case III Strip Pricing Case ------------------- ------------------- ------------------- -------------------- Terminal Multiple of SEC Value 15.0% 15.0% 15.0% 15.0% 1.90 $71.84 $80.65 $ 93.30 $73.98 2.00 $75.52 $84.79 $ 98.11 $77.77 2.10 $79.20 $88.94 $102.92 $81.56 ==================================================================================================================================== Equity Reference Value Range $/Share $75.00 - 85.00 ==================================================================================================================================== [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 35 PROJECT VIPER / MAY 23, 2000 Going Concern Analysis (cont'd) Tactical Acquisition Case $MM, except per share amounts Terminal Multiple of Year 10 Estimated SEC Value ==================================================================================================================================== Equity Reference Value $MM --------------------------------------------------------------------------------------- Pricing Case I Pricing Case II Pricing Case III Strip Pricing Case ------------------- ------------------- ------------------- -------------------- Terminal Multiple of SEC Value 15.0% 15.0% 15.0% 15.0% 1.90 $7,726 $8,666 $10,005 $8,000 2.00 $8,122 $9,112 $10,521 $8,411 2.10 $8,519 $9,558 $11,038 $8,822 ==================================================================================================================================== Equity Reference Value $/Share --------------------------------------------------------------------------------------- Pricing Case I Pricing Case II Pricing Case III Strip Pricing Case ------------------- ------------------- ------------------- -------------------- Terminal Multiple of SEC Value 15.0% 15.0% 15.0% 15.0% 1.90 $77.03 $86.40 $ 99.75 $79.76 2.00 $80.98 $90.85 $104.90 $83.86 2.10 $84.93 $95.30 $110.05 $87.96 ==================================================================================================================================== Equity Reference Value Range $/Share $80.00 - 90.00 ==================================================================================================================================== [LOGO OF SALOMON SMITH BARNEY] [LOGO OF PETRIE PARKMAN & Co.] 36