PIONEER NATURAL RESOURCES COMPANY

Open Commodity Hedge Positions as of August 31, 2005
----------------------------------------------------

                        2005
                  ------------------
                   Third     Fourth
                  Quarter    Quarter      2006       2007       2008
                  --------  --------    --------   --------   --------
Average Daily
 Oil Production
 Hedged:
  Swap
   Contracts:
  Volume (Bbl)      27,000     27,000     10,000     13,000     17,000
  NYMEX price
   (Bbl)         $   27.97  $   27.97  $   31.69  $   30.89  $   29.21
  Collar
   Contracts:
  Volume (Bbl)           -          -      9,129      4,500          -
  NYMEX price
   (Bbl)
     Ceiling     $       -  $       -  $   74.92  $   90.43  $       -
     Floor       $       -  $       -  $   44.25  $   50.00  $       -

Average Daily Gas
 Production Hedged:
  Swap Contracts:
  Volume (MMBtu)   283,422    253,535     73,842     29,195      5,000
  NYMEX price
   (MMBtu) (a)   $    5.20 $     5.20  $    4.30  $    4.30  $    5.40
  Collars
   Contracts:
  Volume (MMBtu)         -          -    183,685    165,000          -
  NYMEX price
   (MMBtu) (a)
     Ceiling     $       - $        -  $   14.57  $   12.75  $       -
     Floor       $       - $        -  $    7.02  $    7.00  $       -

-----------------
  (a) Approximate, based on historical differentials to index
      prices.