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.