Exhibit 99.1 Kerr-McGee Corporation Oil and Gas Derivatives As of September 2004 2004 ---------------------------------------------------------------------------------------------------------- First Quarter Second Quarter Third Quarter Fourth Quarter ------------------------- ------------------------- ------------------------- ------------------------- Crude Oil ($/Barrel) Avg Price/Collar BOPD Avg Price/Collar BOPD Avg Price/Collar BOPD Avg Price/Collar BOPD ---------------- ------- ---------------- ------- ---------------- ------- ---------------- ------- Fixed-price swaps (WTI) $29.03 52,352 $28.23 54,300 $27.93 65,882 $28.54 68,015 Fixed-price swaps (Brent) $26.76 49,286 $26.27 51,800 $26.45 46,850 $26.71 52,000 Costless collars (WTI) - - - - - - - - Three-way Collars (NYMEX) - - - - $24.38 - $27.71 4,000 $24.38 - $27.71 4,000 Three-way average floor $19.25 $19.25 ------- ------- ------- ------- Total 101,638 106,100 116,732 124,015 ======= ======= ======= ======= 2004 ---------------------------------------------------------------------------------------------------------- First Quarter Second Quarter Third Quarter Fourth Quarter ------------------------- ------------------------- ------------------------- ------------------------- Natural Gas ($/MMBtu) (1) Avg Price/Collar MMBtu/D Avg Price/Collar MMBtu/D Avg Price/Collar MMBtu/D Avg Price/Collar MMBtu/D ---------------- ------- ---------------- ------- ---------------- ------- ---------------- ------- Fixed-price swaps (NYMEX) $5.33 195,000 $4.74 565,000 $4.89 807,663 $4.97 870,000 Fixed-price swaps (NWPRM) - - - - $3.33 30,000 $3.33 30,000 Costless collars (NYMEX) $4.48 - $6.00 85,000 - - $3.70 - $4.00 44,674 $3.70 - $4.00 44,674 $4.64 - $7.00 50,000 $4.71 - $7.50 50,000 $5.00 - $6.74 50,000 $5.00 - $6.06 100,000 $5.00 - $6.01 25,000 Three-way collars (NYMEX) - - - - $4.00 - $5.00 10,000 $4.00 - $5.00 10,000 Three-way average floor $3.15 $3.15 ------- ------- ------- ------- Total 555,000 565,000 892,337 954,674 ======= ======= ======= ======= 2004 ---------------------------------------------------------------------------------------------------------- First Quarter Second Quarter Third Quarter Fourth Quarter ------------------------- ------------------------- ------------------------- ------------------------- Basis swaps versus NYMEX ($/MMBtu)(1) Avg Price/Collar MMBtu/D Avg Price/Collar MMBtu/D Avg Price/Collar MMBtu/D Avg Price/Collar MMBtu/D ---------------- ------- ---------------- ------- ---------------- ------- ---------------- ------- CIG $0.62 120,000 $0.59 46,703 $0.65 75,000 $0.68 161,196 NWPRM $0.20 15,000 $0.20 15,000 $0.38 25,000 $0.38 25,000 ------- ------- ------- ------- Total 135,000 61,703 100,000 186,196 ======= ======= ======= ======= Notes: - ------ MMBtu/D = million British thermal units per day NWPRM = Northwest Pipeline Rocky Mountain Index Hedges attributed to Westport and hedges applicable to the Westport merger are included as of third quarter 2004. For further disclosure regarding accounting treatment of derivatives, please refer to the Quarterly Report on Form 10-Q for the second quarter 2004, filed on August 6, 2004. (1) Derivative transactions are on a million Btu (MMBtu) basis. Kerr-McGee reports production/sales on a MCF basis. The conversion rate is 1.080 MMBtu to 1 MCF. ** Cautionary Statement Concerning Forward-Looking Statements ** The information contained in this table represents Kerr-McGee's current derivative contracts. These derivative contracts were entered into based on projected production volume forecasts. These forecasts are estimated projections that may or may not occur in the future, and constitute "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995, in those documents in which such projections are provided. Future results and developments set forth in this statement may be affected by numerous uncertainties, factors and risks, such as but not limited to the accuracy of the assumptions that underlie the statement, the success of the oil and gas exploration and production program, drilling risks, market value of oil and gas, uncertainties in interpreting engineering data, changes in laws and regulations, the ability to respond to challenges in international markets, political or economic conditions, trade and regulatory matters, and other factors and risks identified in the Risk Factors section of Kerr-McGee's Annual Report on Form 10-K and other SEC filings. Actual results and developments may differ materially from those expressed or implied in this statement. Therefore, the information contained in this statement may not be accurate. Kerr-McGee does not undertake to update, revise or correct any of the forward-looking information. Kerr-McGee Corporation Oil and Gas Derivatives As of September 2004 2005 2006 ------------------------- ------------------------- Full Year Full Year ------------------------- ------------------------- Crude Oil ($/Barrel) Avg Price/Collar BOPD Avg Price/Collar BOPD ---------------- ------- ---------------- ------- Fixed-price swaps (WTI) $29.23 3,000 - - Fixed-price swaps (Brent) - - - - Costless collars (WTI) $28.50 - $31.89 14,000 $27.00 - $30.58 19,000 Three-way Collars (NYMEX)$25.00 - $28.23 5,000 $25.00 - $28.65 2,000 Three-way average floor $20.93 $20.88 ------- ------- Total 22,000 21,000 ======= ======= 2005 2006 ------------------------- ------------------------- Full Year Full Year ------------------------- ------------------------- Natural Gas ($/MMBtu) (1) Avg Price/Collar MMBtu/D Avg Price/Collar MMBtu/D ---------------- ------- ---------------- ------- Fixed-price swaps (NYMEX) $4.42 55,000 - - Fixed-price swaps (NWPRM) - - - - Costless collars (NYMEX) $4.09 - $5.57 60,000 $4.75 - $5.51 340,000 $5.00 - $6.25 280,000 Three-way collars (NYMEX) - - $4.00 - $6.00 20,000 Three-way average floor $3.04 ------- ------- Total 395,000 360,000 ======= ======= 2005 2006 ------------------------- ------------------------- Full Year Full Year ------------------------- ------------------------- Basis swaps versus NYMEX ($/MMBtu)(1) Avg Price/Collar MMBtu/D Avg Price/Collar MMBtu/D ---------------- ------- ---------------- ------- CIG $0.60 59,452 $0.39 20,000 NWPRM $0.49 33,630 $0.20 15,000 ------- ------- Total 93,082 35,000 ======= ======= Notes: - ------ MMBtu/D = million British thermal units per day NWPRM = Northwest Pipeline Rocky Mountain Index Hedges attributed to Westport and hedges applicable to the Westport merger are included as of third quarter 2004. For further disclosure regarding accounting treatment of derivatives, please refer to the Quarterly Report on Form 10-Q for the second quarter 2004, filed on August 6, 2004. (1) Derivative transactions are on a million Btu (MMBtu) basis. Kerr-McGee reports production/sales on a MCF basis. The conversion rate is 1.080 MMBtu to 1 MCF. ** Cautionary Statement Concerning Forward-Looking Statements ** The information contained in this table represents Kerr-McGee's current derivative contracts. These derivative contracts were entered into based on projected production volume forecasts. These forecasts are estimated projections that may or may not occur in the future, and constitute "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995, in those documents in which such projections are provided. Future results and developments set forth in this statement may be affected by numerous uncertainties, factors and risks, such as but not limited to the accuracy of the assumptions that underlie the statement, the success of the oil and gas exploration and production program, drilling risks, market value of oil and gas, uncertainties in interpreting engineering data, changes in laws and regulations, the ability to respond to challenges in international markets, political or economic conditions, trade and regulatory matters, and other factors and risks identified in the Risk Factors section of Kerr-McGee's Annual Report on Form 10-K and other SEC filings. Actual results and developments may differ materially from those expressed or implied in this statement. Therefore, the information contained in this statement may not be accurate. Kerr-McGee does not undertake to update, revise or correct any of the forward-looking information.