Document:

Unassociated Document

    
      
        
          
            

          

          Exhibit 10.22

           

          Plains

          Marketing,
L.P.

          10 Desta
Drive. Suite 200E | Midland, Texas 7870 | Phone: (432) 683-8622 | Fax: (432)
683-0849

          

          September
4, 2009

          

          Pioneer
Natural Resource USA

          5205 N
O'Connor Blvd., Suite 900

          Irving,
TX 75039

          Fax/email:
(972) 969 3574

          

          RE: PMLP
Contract: 2585-1013

          

          Effective
on and after September 1, 2009, please amend the subject contract by deleting
the "Price" clause and inserting the "Price" clause as follows:

          

          
            	
                    PRICE:

                  	
                    For
      the crude oil sold and delivered hereunder, PMLP agrees to pay a price per
      barrel which shall be calculated as
follows:

                  

          

          

          
            	
                     
      

                  	
                    a.

                  	
                    Determine
      arithmetic average of the daily settlement price for the "Light Sweet
      crude Oil" prompt month contract reported by the New York Mercantile
      Exchange (NYMEC) from the first day of the delivery month through the last
      day of the delivery month, including weekends and U.S. holidays with the
      previous day's settlement price applying to weekends and U.S.
      holidays.

                  

          

          

          
            	
                     
      

                  	
                    b.

                  	
                    To
      the number determined in the foregoing subparagraph (a.), add the
      arithmetic average of the daily settlement price for the crude contract
      reported by the NYMEX from the day the delivery month becomes the prompt
      trading month through the last day of the trading for the delivery month,
      market open quotes only, less the average of the daily settlement price
      for the second month NYMEX crude contract trading over the same period,
      times a percentage calculated from the number of days starting with the
      first day of the delivery month and ending with the day preceding the
      first trade day after the NYMEX crude contract expiration date during the
      delivery month, divided by the number of days in the delivery
      month.

                  

          

          

          
            	
                     
      

                  	
                    c.

                  	
                    To
      the number determined in the subparagraph (a. and b.) above, add the
      arithmetic average of the daily settlement price for the crude contract
      reported by the NYMEX from the day the delivery month becomes the prompt
      trading month through the last day of trading for the delivery month,
      market open quotes only, less the average of the daily settlement price
      for the third month NYMEX crude contract trading over the same period,
      times a percentage calculated from the number of days starting with first
      trade day after the NYMEX crude contract expiration date during the
      delivery month and ending with the last day of the delivery month, divided
      by the number of days in the delivery
month.

                  

          

          

          
            	
                     
      

                  	
                    d.

                  	
                    To
      the number determined in the foregoing subparagraph (c.) add the average
      of the daily high and low quotes for WTI (Midland) and subtract the
      average of the daily high and low quotes for WTI, (Cushing) for the month
      of delivery in Platt's Crude Oil
      Market Wire "America's Crude Oil Assessments" based on pricing
      assessed for the days the U.S. crude oil market is open (weekends and U.S.
      holidays excluded) during the period beginning with the 26th
      day of the month that is two (2) months prior to delivery through and
      including the 25th
      day of the month that is immediately prior to the month of delivery,
      provided, however, that if the first day of the period falls on a day
      which the U.S. crude oil market is closed, the period shall begin on the
      first trading day thereafter, and if the last day of the period falls on a
      day on which the U. S. crude oil market is closed, the period shall end on
      the last trading day prior thereto.

                  

          

          

          
            	
                     
      

                  	
                    e.

                  	
                    To
      the number determined in the forgoing subparagraph (d.), subtract the net
      of the following: (Sum of the Midland WTS differential minus Midland WTI
      Differential divided by 14). The number determined pursuant to this
      subparagraph (e.) and subparagraphs (a.), (b.), (c.) and (d.) shall be the
      base price per barrel of crude oil.
(X1585)

                  

          

          

          
            	
                     
      

                  	
                    f.

                  	
                    To
      the number determined pursuant to subparagraphs (a.) through (e.),
      subtract the amount indicated on Exhibit "A", attached
    hereto.

                  

          

          
            
               

            

            
               

              
                

              

            

            
               

            

          

          Except as
herein amended, all other terms and conditions of said contract shall remain in
full force and effect.

          

          This
fax/email evidences our understanding of the entire agreement and shall
constitute the formal contract.

          

          Please
acknowledge by return fax/email your acceptance of the agreement to the terms
stated herein. If no response from the Counterparty is received within five (5)
business days, the contract is considered binding. These terms and conditions
will be deemed accepted if Pioneer Natural Resources Usa begins performance of
its obligations hereunder.

          

          The
parties agree that faxed/emailed documents shall be deemed to be admissible as
primary evidence in a court of law as original or as counterparts of the
original documents, either of which is to be retained an available for
inspection.

          

          Very
truly yours,

          

          
            	
                    PLAINS
      MARKETING, L.P.

                  	 
      
	
                    By
      Plains Marketing GP Inc.

                  	 
      
	
                    Its
      General Partner

                  	 
      
	 
      	 
      
	
                    /s/
      Mike A. Weller

                  	
                    /s/
      Hershal K. Wolfe

                  
	 
      	 
      
	
                    Mike
      A. Weller

                  	
                    Hershal
      K. Wolfe

                  
	
                    Senior
      crude Oil Representative

                  	
                    Vice
      President Marketing

                  

          

        

         

        
          
            
            

          

          
            
            

            
              

            

          

          
            
            

          

        

         

        Exhibit
"A"

        

        Sep 04,
2009

        Page 1 of
13

        

        
          	
                  Plains
      Contract:

                	 	
                  2582-1013

                	 	
                  Effective:
      09-01-2009

                	 	
                  Plains
      Marketing L.P.

                	 
      

        

        
           

          
            
              	
                      PM

                      Lease

                      ‡=inact

                    	 
      	 
      	 
      	
                      Lease

                    	 
      	
                      Operator

                    	 
      	
                      County/Parrish

                    	 	 
      	 	
                      Price

                    	 
      	
                      Price

                      Method

                    	 
      	
                      Applicable

                      Premium

                      Or

                      (Deduct)

                    	 
      	
                      Fuel

                      Adjustment

                    	 
      	
                      Percent

                    	 
      	
                      Gravity

                    	 
      	
                      State

                      Lease

                    
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	
                      139893

                    	 
      	 
      	 
      	
                      T L
      WALLACE

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      DAWSON

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      016168

                    
	
                      128758

                    	 
      	 
      	 
      	
                      ATKINSON,
      W.B. C

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      014077

                    
	
                      128749

                    	 
      	 
      	 
      	
                      BIGBY
      WA B

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      008044

                    
	
                      128750

                    	 
      	 
      	 
      	
                      BRYANS
      & COX

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      0856

                    
	
                      128760

                    	 
      	 
      	 
      	
                      BRYANS
      M.V. A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5338

                    
	
                      128759
      ‡

                    	 
      	 
      	 
      	
                      COX
      X.B. B

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      014091

                    
	
                      142207

                    	 
      	
                      (20)

                    	 
      	
                      DAVENPORT
      RS "B" 5, 11,13,17

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      0861

                    
	
                      142206

                    	 
      	
                      (20)

                    	 
      	
                      DAVENPORT
      RS -A- 15

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      0861

                    
	
                      128751

                    	 
      	
                      (20)

                    	 
      	
                      DAVENPORT
      RS A 2,6,9

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      0861

                    
	
                      059989

                    	 
      	 
      	 
      	
                      F A
      WILDE

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5137

                    
	
                      128757
      ‡

                    	 
      	 
      	 
      	
                      REYNOLDS
      CC

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      014076

                    
	
                      054118

                    	 
      	 
      	 
      	
                      SDU
      133A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      059688

                    	 
      	 
      	 
      	
                      SDU
      135A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      059689

                    	 
      	 
      	 
      	
                      SDU
      136A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      054076

                    	 
      	 
      	 
      	
                      SDU
      156A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      059750

                    	 
      	 
      	 
      	
                      SDU
      167A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      054272

                    	 
      	 
      	 
      	
                      SDU
      170A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      059764

                    	 
      	 
      	 
      	
                      SDU
      TR 64-A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      054183

                    	 
      	 
      	 
      	
                      SDU
      TRACT 107 A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128547

                    	 
      	 
      	 
      	
                      SDU
      TRACT 108 A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128906

                    	 
      	 
      	 
      	
                      SDU
      TRACT 109 A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      055364

                    	 
      	 
      	 
      	
                      SDU
      TRACT 110

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.9000)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      059988

                    	 
      	 
      	 
      	
                      SDU
      TRACT 110 A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.9000)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128561

                    	 
      	 
      	 
      	
                      SDU
      TRACT 111 A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128545

                    	 
      	 
      	 
      	
                      SDU
      TRACT 112 A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      054189

                    	 
      	 
      	 
      	
                      SDU
      TRACT 132 A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.9000)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      054186

                    	 
      	 
      	 
      	
                      SDU
      TRACT 134 A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.9000)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128559

                    	 
      	 
      	 
      	
                      SDU
      TRACT 137 A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      055365

                    	 
      	 
      	 
      	
                      SDU
      TRACT 138 A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128930

                    	 
      	 
      	 
      	
                      SDU
      TRACT 139 A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 	
                      TX

                    	 	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    

            

            
              
                 

              

              
                 

                
                  

                

              

              
                 

              

            

          

           

          
            Exhibit
"A"

            

            Sep 04,
2009

            Page 2 of
13

            

            
              	
                      Plains
      Contract:

                    	 	
                      2582-1013

                    	 	
                      Effective:
      09-01-2009

                    	 	
                      Plains
      Marketing L.P.

                    	 
      

            

            
               

            

          

          
            
              	 
      

                      PM

                      Lease

                      ‡=inact

                    	 	 	 	 
      

                      Lease

                    	 	 
      

                      Operator

                    	 	 
      

                      County/Parrish

                    	 	 	 	 
      

                      Price

                    	 	 
      

                      Price

                      Method

                    	 	
                      Applicable

                      Premium

                      Or

                      (Deduct)

                    	 	
                      Fuel

                      Adjustment

                    	 	
                      Percent

                    	 	
                      Gravity

                    	 	
                      State

                      Lease

                    
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	
                      128554

                    	 
      	 
      	 
      	
                      SDU
      TRACT 140 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128557

                    	 
      	 
      	 
      	
                      SDU
      TRACT 141 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128553

                    	 
      	 
      	 
      	
                      SDU
      TRACT 142 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128566

                    	 
      	 
      	 
      	
                      SDU
      TRACT 142 B

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      055136

                    	 
      	 
      	 
      	
                      SDU
      TRACT 144 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.9000)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      054188

                    	 
      	 
      	 
      	
                      SDU
      TRACT 157 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128555

                    	 
      	 
      	 
      	
                      SDU
      TRACT 166 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128558

                    	 
      	 
      	 
      	
                      SDU
      TRACT 168 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128551

                    	 
      	 
      	 
      	
                      SDU
      TRACT 169 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128552

                    	 
      	 
      	 
      	
                      SDU
      TRACT 181 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128560

                    	 
      	 
      	 
      	
                      SDU
      TRACT 186 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      054185

                    	 
      	 
      	 
      	
                      SDU
      TRACT 197 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.9000)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      054190

                    	 
      	 
      	 
      	
                      SDU
      TRACT 198 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.9000)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      054177

                    	 
      	 
      	 
      	
                      SDU
      TRACT 19 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.9000)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128567

                    	 
      	 
      	 
      	
                      SDU
      TRACT 212 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128569

                    	 
      	 
      	 
      	
                      SDU
      TRACT 213 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      052718

                    	 
      	 
      	 
      	
                      SDU
      TRACT 23 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.9000)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128907

                    	 
      	 
      	 
      	
                      SDU
      TRACT 38 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128548

                    	 
      	 
      	 
      	
                      SDU
      TRACT 39 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128908

                    	 
      	 
      	 
      	
                      SDU
      TRACT 39 B

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      054176

                    	 
      	 
      	 
      	
                      SDU
      TRACT 44 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.9000)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      054180

                    	 
      	 
      	 
      	
                      SDU
      TRACT 45 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.9000)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128573

                    	 
      	 
      	 
      	
                      SDU
      TRACT 56 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128909

                    	 
      	 
      	 
      	
                      SDU
      TRACT 58

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128570

                    	 
      	 
      	 
      	
                      SDU
      TRACT 58 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128549

                    	 
      	 
      	 
      	
                      SDU
      TRACT 59 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128544

                    	 
      	 
      	 
      	
                      SDU
      TRACT 61 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128565

                    	 
      	 
      	 
      	
                      SDU
      TRACT 73 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128564

                    	 
      	 
      	 
      	
                      SDU
      TRACT 74 B

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128572

                    	 
      	 
      	 
      	
                      SDU
      TRACT 75 A

                    	 	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    

            

            
              
                 

              

              
                 

                
                  

                

              

              
                 

              

            

            
               

              Exhibit
"A"

              

              Sep 04,
2009

              Page 3
of 13

              

              
                	
                        Plains
      Contract:

                      	 	
                        2582-1013

                      	 	
                        Effective:
      09-01-2009

                      	 	
                        Plains
      Marketing L.P.

                      	 
      

              

               

            

            
              	
                      PM

                      Lease

                      ‡=inact

                    	 	 	 	
                      Lease

                    	 	
                      Operator

                    	 	
                      County/Parrish

                    	 	 	 	
                      Price

                    	 	
                      Price

                      Method

                    	 	Applicable
      

                      Premium

                      Or

                      (Deduct)

                    	 	 
      

                      Fuel

                      Adjustment

                    	 	
                      Percent

                    	 	
                      Gravity

                    	 	 
      

                      State

                      Lease

                    
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	
                      128571

                    	 
      	 
      	 
      	
                      SDU
      TRACT 76 A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      059554

                    	 
      	 
      	 
      	
                      SDU
      TRACT 77 A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.9000)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      054184

                    	 
      	 
      	 
      	
                      SDU
      TRACT 78 A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.9000)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      059555

                    	 
      	 
      	 
      	
                      SDU
      TRACT 80 A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.9000)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128546

                    	 
      	 
      	 
      	
                      SDU
      TRACT 81 A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128550

                    	 
      	 
      	 
      	
                      SDU
      TRACT 82 A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      054181

                    	 
      	 
      	 
      	
                      SDU
      TRACT 85-A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.9000)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      054284

                    	 
      	 
      	 
      	
                      SDU
      TRACT 86 A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.9000)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      054182

                    	 
      	 
      	 
      	
                      SDU
      TRACT 88 A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.9000)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128563

                    	 
      	 
      	 
      	
                      SDU
      TRACT 894

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128748

                    	 
      	 
      	 
      	
                      SPRABERRY
      DRIVER UNIT

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      015400

                    
	
                      128752

                    	 
      	 
      	 
      	
                      WILLIAMS,
      E.P. A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      GLASSCOCK

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      014097

                    
	
                      094152

                    	 
      	
                      (19)

                    	 
      	
                      ASHLEY

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5852

                    
	
                      094153
      ‡

                    	 
      	 
      	 
      	
                      CALLAWAY

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      021950

                    
	
                      076720

                    	 
      	 
      	 
      	
                      CASTLE
      1 X

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      027052

                    
	
                      084944

                    	 
      	
                      (13)

                    	 
      	
                      CLARENCE
      #1

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5602

                    
	
                      549401

                    	 
      	
                      (9)

                    	 
      	
                      CURTIS

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5605

                    
	
                      004171

                    	 
      	
                      (9)

                    	 
      	
                      CURTIS
      "B"

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5605

                    
	
                      004247

                    	 
      	 
      	 
      	
                      CURTIS
      "C"

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5287

                    
	
                      004172

                    	 
      	 
      	 
      	
                      CURTIS
      "D"

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      032934

                    
	
                      004525

                    	 
      	
                      (12)

                    	 
      	
                      CURTIS
      "E"

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      7198

                    
	
                      004283

                    	 
      	
                      (9)

                    	 
      	
                      CURTIS
      "H"

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5605

                    
	
                      004392

                    	 
      	
                      (9)

                    	 
      	
                      CURTIS
      "K"

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5605

                    
	
                      074968

                    	 
      	
                      (13)

                    	 
      	
                      CURTIS
      "P"

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5602

                    
	
                      076978

                    	 
      	
                      (13)

                    	 
      	
                      CURTIS
      "R"

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5602

                    
	
                      078429

                    	 
      	
                      (13)

                    	 
      	
                      CURTIS
      "U"

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5602

                    
	
                      078400

                    	 
      	
                      (13)

                    	 
      	
                      CURTIS
      "W"

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5602

                    
	
                      004088

                    	 
      	
                      (9)

                    	 
      	
                      CURTIS
      "A"

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5605

                    
	
                      135131

                    	 
      	
                      (12)

                    	 
      	
                      CURTIS
      F #2

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      7198

                    
	
                      004282

                    	 
      	
                      (9)

                    	 
      	
                      CURTIS
      G

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5605

                    

            

            
              
                 

              

              
                 

                
                  

                

              

              
                 

              

            

            
               

              Exhibit
"A"

              

              Sep 04,
2009

              Page 4
of 13

              

              
                	
                        Plains
      Contract:

                      	 	
                        2582-1013

                      	 	
                        Effective:
      09-01-2009

                      	 	
                        Plains
      Marketing L.P.

                      	 
      

              

               

            

            
              	 
      

                      PM

                      Lease

                      ‡=inact

                    	 	 	 	
                      Lease

                    	 	
                      Operator

                    	 	
                      County/Parrish

                    	 	 	 	
                      Price

                    	 	 
      

                      Price

                      Method

                    	 	Applicable 

                      Premium

                      Or

                      (Deduct)

                    	 	
                      Fuel

                      Adjustment

                    	 	
                      Percent

                    	 	
                      Gravity

                    	 	
                      State

                      Lease

                    
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	
                      004528

                    	 
      	
                      (12)

                    	 
      	
                      CURTIS
      I

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      7198

                    
	
                      112604

                    	 
      	
                      (12)

                    	 
      	
                      CURTIS
      J

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      7198

                    
	
                      549980

                    	 
      	
                      (9)

                    	 
      	
                      CURTIS
      L

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5605

                    
	
                      550021

                    	 
      	
                      (12)

                    	 
      	
                      CURTIS
      M

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      7198

                    
	
                      112608

                    	 
      	
                      (12)

                    	 
      	
                      CURTIS
      N

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      7198

                    
	
                      114710

                    	 
      	
                      (9)

                    	 
      	
                      CURTIS
      O

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5605

                    
	
                      012906

                    	 
      	
                      (9)

                    	 
      	
                      CURTIS
      Q

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5605

                    
	
                      077408

                    	 
      	
                      (13)

                    	 
      	
                      CURTIS
      S

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5602

                    
	
                      550513

                    	 
      	
                      (9)

                    	 
      	
                      CURTIS
      T

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5605

                    
	
                      550548

                    	 
      	
                      (9)

                    	 
      	
                      CURTIS
      V

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5605

                    
	
                      059998

                    	 
      	
                      (13)

                    	 
      	
                      CURTIS
      X

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5602

                    
	
                      096203

                    	 
      	
                      (15)

                    	 
      	
                      DICKENSON-C-#13
      & 14

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      021525

                    
	
                      123002

                    	 
      	
                      (15)

                    	 
      	
                      DICKENSON-C-#15

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      021525

                    
	
                      003363

                    	 
      	
                      (11)

                    	 
      	
                      DOVE

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5604

                    
	
                      004522

                    	 
      	
                      (12)

                    	 
      	
                      DOVE
      "Z"

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      7198

                    
	
                      095854

                    	 
      	
                      (11)

                    	 
      	
                      DOVE
      "B"

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5604

                    
	
                      095855

                    	 
      	
                      (11)

                    	 
      	
                      DOVE
      "C"

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5604

                    
	
                      095856

                    	 
      	 
      	 
      	
                      DOVE
      "G"

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      032497

                    
	
                      093966

                    	 
      	
                      (9)

                    	 
      	
                      DOVE
      "U"

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5605

                    
	
                      004158

                    	 
      	
                      (11)

                    	 
      	
                      DOVE
      "W"

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5604

                    
	
                      095950

                    	 
      	
                      (9)

                    	 
      	
                      DOVE
      A

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5605

                    
	
                      095935

                    	 
      	
                      (10)

                    	 
      	
                      DOVE
      D

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5929

                    
	
                      095936

                    	 
      	 
      	 
      	
                      DOVE
      E #1 & #2

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      032462

                    
	
                      096076

                    	 
      	 
      	 
      	
                      DOVE
      H

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      032528

                    
	
                      096077

                    	 
      	
                      (9)

                    	 
      	
                      DOVE
      I

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5605

                    
	
                      096078

                    	 
      	
                      (9)

                    	 
      	
                      DOVE
      J

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5605

                    
	
                      059620

                    	 
      	
                      (9)

                    	 
      	
                      DOVE
      J #2

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5605

                    
	
                      003160

                    	 
      	
                      (9)

                    	 
      	
                      DOVE
      K

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5605

                    
	
                      549338

                    	 
      	
                      (9)

                    	 
      	
                      DOVE
      L

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5605

                    
	
                      096079

                    	 
      	
                      (9)

                    	 
      	
                      DOVE
      M

                    	 
      	
                      PIONEER
      NATURAL RES

                    	 
      	
                      IN
      MARTIN

                    	 
      	
                      TX

                    	 
      	
                      X1585

                    	 
      	
                      EDQ

                    	 
      	
                      ($0.5500)

                    	 
      	
                      $0.0000

                    	 
      	
                      100.00000%

                    	 
      	
                      Flat

                    	 
      	
                      5605

                    

            

             

            
              
                
                

              

              
                
                

                
                  

                

              

              
                
                

              

            

              

            
              
                Exhibit
"A"

                

                Sep 04,
2009

                Page 5
of 13

                

                
                  	
                          Plains
      Contract:

                        	 	
                          2582-1013

                        	 	
                          Effective:
      09-01-2009

                        	 	
                          Plains
      Marketing L.P.

                        	 
      

                

                 

              

              
                	
                        
                          PM

                          Lease

                          ‡=inact

                        

                      	 
      	 
      	 
      	
                        Lease

                      	 
      	
                        Operator

                      	 
      	
                        County/Parish

                      	 
      	 
      	 
      	
                        Price

                      	 
      	
                        Price
      Method

                      	 
      	
                        Applicable

                        Premium

                        Or

                        (Deduct)

                      	 
      	
                        Fuel

                        Adjust

                      	 
      	
                        Percent

                      	 
      	
                        Gravity

                      	 
      	
                        State

                        Lease

                      
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                        142124

                      	 
      	
                        (9)

                      	 
      	
                        DOVE
      M #2

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5605

                      
	
                        549680

                      	 
      	
                        (9)

                      	 
      	
                        DOVE
      N

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5605

                      
	
                        004523

                      	 
      	
                        (12)

                      	 
      	
                        DOVE
      -O-

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        7198

                      
	
                        096080

                      	 
      	
                        (9)

                      	 
      	
                        DOVE
      P

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5605

                      
	
                        096378

                      	 
      	
                        (11)

                      	 
      	
                        DOVE
      Q

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5604

                      
	
                        003568

                      	 
      	
                        (11)

                      	 
      	
                        DOVE
      R

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5604

                      
	
                        003698

                      	 
      	
                        (9)

                      	 
      	
                        DOVE
      S

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        60.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5605

                      
	
                        003699

                      	 
      	
                        (9)

                      	 
      	
                        DOVE
      T

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        40.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5605

                      
	
                        112907

                      	 
      	
                        (9)

                      	 
      	
                        DOVE
      V #1

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5605

                      
	
                        139945

                      	 
      	
                        (9)

                      	 
      	
                        DOVE
      V #2

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        032922

                      
	
                        549717

                      	 
      	
                        (9)

                      	 
      	
                        DOVE
      Y

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5605

                      
	
                        055503

                      	 
      	 
      	 
      	
                        ELMA
      L SLAUGHTER

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        020227

                      
	
                        055504

                      	 
      	
                        (18)

                      	 
      	
                        ELMA
      L SLAUGHTER B

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        49.00000%

                      	 
      	
                        Flat

                      	 
      	
                        020227

                      
	
                        130254

                      	 
      	
                        (18)

                      	 
      	
                        ELMA
      L SLAUGHTER B#1

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        51.00000%

                      	 
      	
                        Flat

                      	 
      	
                        020277

                      
	
                        055506

                      	 
      	 
      	 
      	
                        ELMA
      L SLAUGHTER C

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        020332

                      
	
                        055508

                      	 
      	 
      	 
      	
                        ELMA
      L SLAUGHTER E

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        020464

                      
	
                        055511

                      	 
      	 
      	 
      	
                        ELMA
      L SLAUGHTER H

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        020919

                      
	
                        055513

                      	 
      	 
      	 
      	
                        ELMA
      L SLAUGHTER J

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        020955

                      
	
                        055510

                      	 
      	 
      	 
      	
                        ELMA
      L SLAUGHTER G #1-3

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        020911

                      
	
                        071171

                      	 
      	 
      	 
      	
                        ELMA
      L SLAUGHTER G#2-4

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        020911

                      
	
                        094154‡

                      	 
      	 
      	 
      	
                        FOREMAN

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        021725

                      
	
                        094156

                      	 
      	 
      	 
      	
                        FRAZIER

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        022003

                      
	
                        548277

                      	 
      	
                        (17)

                      	 
      	
                        GLASS

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        094157

                      	 
      	 
      	 
      	
                        GLASS
      7

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        022448

                      
	
                        548278

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      A

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        548279

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      B

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        552194

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      �B� #2

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        548287

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      C #1 & #2

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        130123

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      D #2

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        548299

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      D#1

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      

              

               

              
                
                   

                

                
                   

                  
                    

                  

                

                
                   

                

              

              

              
                Exhibit
"A"

                

                Sep 04,
2009

                Page 6
of 13

                

                
                  	
                          Plains
      Contract:

                        	 	
                          2582-1013

                        	 	
                          Effective:
      09-01-2009

                        	 	
                          Plains
      Marketing L.P.

                        	 
      

                

                 

              

              
                	
                        
                          PM

                          Lease

                          ‡=inact

                        

                      	 
      	 
      	 
      	
                        Lease

                      	 
      	
                        Operator

                      	 
      	
                        County/Parish

                      	 
      	 
      	 
      	
                        Price

                      	 
      	
                        Price
      Method

                      	 
      	
                        Applicable

                        Premium

                        Or

                        (Deduct)

                      	 
      	
                        Fuel

                        Adjust

                      	 
      	
                        Percent

                      	 
      	
                        Gravity

                      	 
      	
                        State

                        Lease

                      
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                        120706

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      DD

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        037854

                      
	
                        548334

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      E

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        120708

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      FF

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        548469

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      H

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        120710

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      HH

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        548470

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      I

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        120711

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      II

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        130288

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      J

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        130291

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      K

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        130293

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      L

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        130292

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      M

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        130290

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      N

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        130294

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      O

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        130295

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      T

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        548719

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      Y

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        130289

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      V

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        114777

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      W

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        154028

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      W#3

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        148754

                      	 
      	
                        (17)

                      	 
      	
                        GLASS
      Y

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        096221

                      	 
      	 
      	 
      	
                        GLEN
      COX

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        021702

                      
	
                        549337

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      B#1

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        114774

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      C#1

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        549384

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      D#1

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        114770

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      D#2

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        549466

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      E#1

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        114771

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      E#2

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        549395

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      F

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        032868

                      
	
                        549396

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      G

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        549397

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      H

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        130014

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      H#2

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        032857

                      

              

               

              
                
                   

                

                
                   

                  
                    

                  

                

                
                   

                

              

               

              
                
                  Exhibit
"A"

                  

                  Sep 04,
2009

                  Page 7
of 13

                  

                  
                    	
                            Plains
      Contract:

                          	 	
                            2582-1013

                          	 	
                            Effective:
      09-01-2009

                          	 	
                            Plains
      Marketing L.P.

                          	 
      

                  

                   

                

              

              
                	
                        
                          PM

                          Lease

                          ‡=inact

                        

                      	 
      	 
      	 
      	
                        Lease

                      	 
      	
                        Operator

                      	 
      	
                        County/Parish

                      	 
      	 
      	 
      	
                        Price

                      	 
      	
                        Price
      Method

                      	 
      	
                        Applicable

                        Premium

                        Or

                        (Deduct)

                      	 
      	
                        Fuel

                        Adjust

                      	 
      	
                        Percent

                      	 
      	
                        Gravity

                      	 
      	
                        State

                        Lease

                      
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                        549398

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      I

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        549399

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      J

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        549831

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      K#1

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        549681

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      L

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        549706

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      M

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        549933

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      O

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        549714

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      P

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        549911

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      Q

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        549801

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      R

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        549836

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      S

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        548950

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      V

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        549700

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      W

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        549934

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      X

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        549978

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      Y

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        549983

                      	 
      	
                        (14)

                      	 
      	
                        GUY
      Z

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        070367‡

                      	 
      	 
      	 
      	
                        HALE
      -B-

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        021130

                      
	
                        094158

                      	 
      	 
      	 
      	
                        HAMM

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        021764

                      
	
                        094160

                      	 
      	 
      	 
      	
                        HOWELL

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        021911

                      
	
                        166076

                      	 
      	 
      	 
      	
                        INEZ
      WOODY 2

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        021682

                      
	
                        142021

                      	 
      	
                        (16)

                      	 
      	
                        INEZ
      WOODY B#2

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5858

                      
	
                        154060

                      	 
      	
                        (16)

                      	 
      	
                        INEZ
      WOODY B#3

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5858

                      
	
                        139875

                      	 
      	
                        (16)

                      	 
      	
                        INEZ
      WOODY C#3

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5858

                      
	
                        142023

                      	 
      	
                        (16)

                      	 
      	
                        INEZ
      WOODY C#4

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5858

                      
	
                        142401

                      	 
      	
                        (16)

                      	 
      	
                        INEZ
      WOODY C#6

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5858

                      
	
                        154024

                      	 
      	
                        (16)

                      	 
      	
                        INEZ
      WOODY C#6

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5858

                      
	
                        000110

                      	 
      	 
      	 
      	
                        JC
      SALE

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        021322

                      
	
                        001312

                      	 
      	 
      	 
      	
                        JN
      WOODY JR

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        021761

                      
	
                        097340‡

                      	 
      	 
      	 
      	
                        KEATON
      B

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        217765

                      
	
                        094161

                      	 
      	 
      	 
      	
                        KELLY
      A

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        021685

                      
	
                        001142‡

                      	 
      	 
      	 
      	
                        KEWANEE

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        021797

                      

              

               

              
                
                   

                

                
                   

                  
                    

                  

                

                
                   

                

              

               

              
                
                  Exhibit
"A"

                  

                  Sep 04,
2009

                  Page 8
of 13

                  

                  
                    	
                            Plains
      Contract:

                          	 	
                            2582-1013

                          	 	
                            Effective:
      09-01-2009

                          	 	
                            Plains
      Marketing L.P.

                          	 
      

                  

                   

                

              

              
                	
                        
                          PM

                          Lease

                          ‡=inact

                        

                      	 
      	 
      	 
      	
                        Lease

                      	 
      	
                        Operator

                      	 
      	
                        County/Parish

                      	 
      	 
      	 
      	
                        Price

                      	 
      	
                        Price
      Method

                      	 
      	
                        Applicable

                        Premium

                        Or

                        (Deduct)

                      	 
      	
                        Fuel

                        Adjust

                      	 
      	
                        Percent

                      	 
      	
                        Gravity

                      	 
      	
                        State

                        Lease

                      
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                        094162�

                      	 
      	 
      	 
      	
                        KNOX

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        021759

                      
	
                        093699

                      	 
      	
                        (19)

                      	 
      	
                        LEONARD
      A

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6852

                      
	
                        049490

                      	 
      	
                        (14)

                      	 
      	
                        LOTTIE
      �A�

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        135342

                      	 
      	
                        (14)

                      	 
      	
                        LOTTIE
      "A" #2

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        004503

                      	 
      	
                        (14)

                      	 
      	
                        LOTTIE
      "G"

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        549995

                      	 
      	
                        (14)

                      	 
      	
                        LOTTIE
      B

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        549951

                      	 
      	
                        (14)

                      	 
      	
                        LOTTIE
      C

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        550028

                      	 
      	
                        (14)

                      	 
      	
                        LOTTIE
      D

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        549976

                      	 
      	
                        (14)

                      	 
      	
                        LOTTIE
      E

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        550303

                      	 
      	
                        (14)

                      	 
      	
                        LOTTIE
      H #1

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        114773

                      	 
      	
                        (14)

                      	 
      	
                        LOTTIE
      H #2

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        094573

                      	 
      	
                        (14)

                      	 
      	
                        MABEE
      "P"

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        096831

                      	 
      	
                        (14)

                      	 
      	
                        MABEE
      J#13

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        096907‡

                      	 
      	
                        (1)

                      	 
      	
                        MABEE
      K

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        74.60938%

                      	 
      	
                        Flat

                      	 
      	
                        7567

                      
	
                        548721

                      	 
      	
                        (14)

                      	 
      	
                        MABEE
      O

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        548724

                      	 
      	
                        (14)

                      	 
      	
                        MABEE
      Q

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        547923

                      	 
      	
                        (14)

                      	 
      	
                        MABEE
      V

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        547914

                      	 
      	
                        (14)

                      	 
      	
                        MABEE
      W

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        6857

                      
	
                        094136‡

                      	 
      	 
      	 
      	
                        MADISON
      B

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        021510

                      
	
                        094155

                      	 
      	 
      	 
      	
                        MAYME
      FOREMAN

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        021685

                      
	
                        000029‡

                      	 
      	 
      	 
      	
                        MCREYNOLDS
      "B"

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        022741

                      
	
                        094164

                      	 
      	 
      	 
      	
                        MEEK

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        021979

                      
	
                        073269‡

                      	 
      	 
      	 
      	
                        MORRISON
      "A"

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        026023

                      
	
                        549431

                      	 
      	
                        (17)

                      	 
      	
                        QUAIL
      A

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        549410

                      	 
      	
                        (17)

                      	 
      	
                        QUAIL
      B

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5826

                      
	
                        073902

                      	 
      	 
      	 
      	
                        QUATTLEBAUM

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        026427

                      
	
                        094273

                      	 
      	
                        (11)

                      	 
      	
                        SCHARBAUER
      "F"

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5604

                      
	
                        094456

                      	 
      	
                        (10)

                      	 
      	
                        SCHARBAUER
      "N"

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5829

                      
	
                        002933

                      	 
      	
                        (10)

                      	 
      	
                        SCHARBAUER
      "O"

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        5829

                      
	
                        094508

                      	 
      	 
      	 
      	
                        SCHARBAUER
      "P"

                      	 
      	
                        PIONEER
      NATURAL RES USA IN

                      	 
      	
                        MARTIN

                      	 
      	
                        TX

                      	 
      	
                        X1585

                      	 
      	
                        EDQ

                      	 
      	
                        ($0.5500)

                      	 
      	
                        $0.0000

                      	 
      	
                        100.00000%

                      	 
      	
                        Flat

                      	 
      	
                        032086

                      

              

            

          

        

      

       

      
        
           

        

        
           

          
            

          

        

        
           

        

      

      
Exhibit
"A"

      

      Sep 04,
2009

      Page 9 of
13

      

      
        	
                Plains
      contract:

              	 
      	
                2582-1013

              	 
      	
                Effective:
      09-01-2009

              	 
      	
                Plains
      Marketing L.P.

              

      

      

      

      
        	
                
                  
                    PM

                    Lease

                    ‡=inact

                  

                

              	 
      	 
      	 
      	
                Lease

              	 
      	
                Operator

              	 
      	
                County/Parish

              	 
      	 
      	 
      	
                Price

              	 
      	
                Price

                Method

              	 
      	
                Applicable

                Premium

                or

                (Deduct)

              	 
      	
                Fuel

                Adjust

              	 
      	
                Percent

              	 
      	
                Gravity

              	 
      	
                State

                Lease

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                094822

              	 
      	
                (9)

              	 
      	
                SCHARBAUER
      "U"

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5605

              
	
                094823

              	 
      	
                (11)

              	 
      	
                SCHARBAUER
      "V"

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5604

              
	
                098890‡

              	 
      	 
      	 
      	
                SCHARBAUER
      -C-

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                022641

              
	
                112602

              	 
      	
                (10)

              	 
      	
                SCHARBAUER
      C #4

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5929

              
	
                112805

              	 
      	
                (9)

              	 
      	
                SCHARBAUER
      E

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5605

              
	
                094305

              	 
      	
                (9)

              	 
      	
                SCHARBAUER
      G

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5605

              
	
                092906

              	 
      	
                (9)

              	 
      	
                SCHARBAUER
      K

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5605

              
	
                094501

              	 
      	
                (9)

              	 
      	
                SCHARBAUER
      L

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5605

              
	
                010570

              	 
      	
                (9)

              	 
      	
                SCHARBAUER
      L #2

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5605

              
	
                059618

              	 
      	
                (9)

              	 
      	
                SCHARBAUER
      P #3

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5605

              
	
                094836

              	 
      	
                (9)

              	 
      	
                SCHARBAUER
      R #1

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5605

              
	
                167897

              	 
      	
                (13)

              	 
      	
                SCHARBAUER
      RANCH #33

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5602

              
	
                167712

              	 
      	
                (13)

              	 
      	
                SCHARBAUER
      RANCH #73

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                037534

              
	
                130034

              	 
      	
                (9)

              	 
      	
                SCHARBAUER
      RANCH 31

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5605

              
	
                135042

              	 
      	
                (9)

              	 
      	
                SCHARBAUER
      RANCH 32

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5605

              
	
                135043

              	 
      	
                (13)

              	 
      	
                SCHARBAUER
      RANCH 34

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5602

              
	
                142067

              	 
      	
                (13)

              	 
      	
                SCHARBAUER
      RANCH 36

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5602

              
	
                126768

              	 
      	
                (13)

              	 
      	
                SCHARBAUER
      RANCH 42

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5602

              
	
                114265

              	 
      	
                (13)

              	 
      	
                SCHARBAUER
      RANCH 44

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5602

              
	
                130455

              	 
      	
                (13)

              	 
      	
                SCHARBAUER
      RANCH 45

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5602

              
	
                156283

              	 
      	
                (13)

              	 
      	
                SCHARBAUER
      RANCH 47

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5602

              
	
                135397

              	 
      	
                (13)

              	 
      	
                SCHARBAUER
      RANCH 53

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5602

              
	
                142172

              	 
      	
                (13)

              	 
      	
                SCHARBAUER
      RANCH 55

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5602

              
	
                130251

              	 
      	
                (13)

              	 
      	
                SCHARBAUER
      RANCH 60

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5602

              
	
                142463

              	 
      	
                (13)

              	 
      	
                SCHARBAUER
      RANCH 64

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5602

              
	
                135138

              	 
      	
                (13)

              	 
      	
                SCHARBAUER
      RANCH 68

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5602

              
	
                154059

              	 
      	
                (13)

              	 
      	
                SCHARBAUER
      RANCH 74

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5602

              
	
                135087

              	 
      	
                (13)

              	 
      	
                SCHARBAUER
      RANCH 75

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5602

              
	
                142173

              	 
      	
                (13)

              	 
      	
                SCHARBAUER
      RANCH A #1

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5602

              
	
                167639

              	 
      	
                (13)

              	 
      	
                SCHARBAUER
      RANCH A #2

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                038227

              

      

      
        
           

        

        
           

          
            

          

        

        
           

        

      

      Exhibit
"A"

      

      Sep 04,
2009

      Page 10
of 13

      

      
        	
                Plains
      contract:

              	 
      	
                2582-1013

              	 
      	
                Effective:
      09-01-2009

              	 
      	
                Plains
      Marketing L.P.

              

      

      

      
        	
                
                  
                    PM

                    Lease

                    ‡=inact

                  

                

              	 
      	 
      	 
      	
                Lease

              	 
      	
                Operator

              	 
      	
                County/Parish

              	 
      	 
      	 
      	
                Price

              	 
      	
                Price

                Method

              	 
      	
                Applicable

                Premium

                or

                (Deduct)

              	 
      	
                Fuel

                Adjust

              	 
      	
                Percent

              	 
      	
                Gravity

              	 
      	
                State

                Lease

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                142318

              	 
      	
                (12)

              	 
      	
                SCHARBAUER
      RANCH A-4

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                7198

              
	
                154262

              	 
      	
                (12)

              	 
      	
                SCHARBAUER
      RANCH A-6

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                7198

              
	
                142068

              	 
      	
                (12)

              	 
      	
                SCHARBAUER
      RANCH A-7

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                7198

              
	
                158284

              	 
      	
                (12)

              	 
      	
                SCHARBAUER
      RANCH A-8

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                7198

              
	
                154151

              	 
      	
                (12)

              	 
      	
                SCHARBAUER
      RANCH A-9

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                7198

              
	
                064324

              	 
      	
                (9)

              	 
      	
                SCHARBAUER
      T #1

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5605

              
	
                065255

              	 
      	
                (11)

              	 
      	
                SCHARBAUER
      X#1

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5604

              
	
                064310

              	 
      	
                (11)

              	 
      	
                SCHARBAUER
      X#2

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5604

              
	
                085912‡

              	 
      	 
      	 
      	
                SCHARBAUER
      -Y-

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                032475

              
	
                096081

              	 
      	
                (9)

              	 
      	
                SCHARBAUER
      Z #1 &#2

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5605

              
	
                059621

              	 
      	
                (9)

              	 
      	
                SCHARBAUER
      Z #3

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5605

              
	
                064327

              	 
      	
                (9)

              	 
      	
                SCHARBAUER
      Z #4

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5605

              
	
                548534

              	 
      	
                (17)

              	 
      	
                SCHENECKER

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                6826

              
	
                548611

              	 
      	
                (17)

              	 
      	
                SCHENECKER
      A

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5826

              
	
                093242

              	 
      	 
      	 
      	
                STEWART
      "A"

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                030394

              
	
                001973

              	 
      	 
      	 
      	
                STEWART
      B

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                022026

              
	
                094165

              	 
      	 
      	 
      	
                WEBB

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                021708

              
	
                097677

              	 
      	
                (3)

              	 
      	
                WELCH
      & WELCH

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                021859

              
	
                007678

              	 
      	
                (3)

              	 
      	
                WELCH
      & WELCH #2

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                021859

              
	
                090009

              	 
      	
                (2)

              	 
      	
                WELCH
      G #3

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                021567

              
	
                097672

              	 
      	
                (2)

              	 
      	
                WELCH
      G #4

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                021667-

              
	
                094151

              	 
      	 
      	 
      	
                WILLIAMS
      "B"

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                021768

              
	
                094169

              	 
      	 
      	 
      	
                WILLIAMS
      "D"

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                022049

              
	
                090010‡

              	 
      	 
      	 
      	
                WINCHESTER
      #1

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                021687

              
	
                001096

              	 
      	 
      	 
      	
                WOODY

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                021688

              
	
                077196

              	 
      	
                (16)

              	 
      	
                WOODY
      J#1

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5658

              
	
                128516

              	 
      	
                (16)

              	 
      	
                WOODY
      J#2

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5856

              
	
                001873

              	 
      	 
      	 
      	
                WOODY-E-

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                021970

              
	
                096250

              	 
      	 
      	 
      	
                WOOOY-H-

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                021889

              
	
                077210

              	 
      	
                (16)

              	 
      	
                WOODY
      -1-WELL #3

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5858

              

      

      
        
           

        

        
           

          
            

          

        

        
           

        

      

      Exhibit
"A"

      

      Sep 04,
2009

      Page 11
of 13

      

      
        	
                Plains
      contract:

              	 
      	
                2582-1013

              	 
      	
                Effective:
      09-01-2009

              	 
      	
                Plains
      Marketing L.P.

              

      

      

      
        	
                
                  
                    PM

                    Lease

                    ‡=inact

                  

                

              	 
      	 
      	 
      	
                Lease

              	 
      	
                Operator

              	 
      	
                County/Parish

              	 
      	 
      	 
      	
                Price

              	 
      	
                Price

                Method

              	 
      	
                Applicable

                Premium

                or

                (Deduct)

              	 
      	
                Fuel

                Adjust

              	 
      	
                Percent

              	 
      	
                Gravity

              	 
      	
                State

                Lease

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                077481

              	 
      	
                (16)

              	 
      	
                WOODY
      K#1

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5858

              
	
                128517

              	 
      	
                (16)

              	 
      	
                WOODY
      K#2

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MARTIN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5858

              
	
                014148‡

              	 
      	 
      	 
      	
                FLOYD
      "A"

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MIDLAND

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                006610

              
	
                106957

              	 
      	
                (8)

              	 
      	
                MCCLINTIC
      59-1

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MIDLAND

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                4479

              
	
                097583

              	 
      	
                (4)

              	 
      	
                MCCLINTIC
      D

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MIDLAND

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                4419

              
	
                055935

              	 
      	
                (8)

              	 
      	
                MCCLINTIC
      E

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MIDLAND

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                4479

              
	
                064598

              	 
      	
                (22)

              	 
      	
                MCCLINTIC
      E

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MIDLAND

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5030

              
	
                064600

              	 
      	
                (22)

              	 
      	
                MCCLINTIC
      E NCT #30 #53

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MIDLAND

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5030

              
	
                064599

              	 
      	
                (22)

              	 
      	
                MCCLINTIC
      F

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MIDLAND

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                5030

              
	
                064321

              	 
      	
                (8)

              	 
      	
                MCCLINTIC
      G

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MIDLAND

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                4479

              
	
                064316

              	 
      	
                (4)

              	 
      	
                MCCLINTIC
      H

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MIDLAND

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                4419

              
	
                064322

              	 
      	
                (8)

              	 
      	
                MCCLINTIC
      J

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MIDLAND

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                4479

              
	
                054116

              	 
      	 
      	 
      	
                MCCLINTIC
      L

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MIDLAND

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                034621

              
	
                054099

              	 
      	 
      	 
      	
                MCCLINTIC
      M #54

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MIDLAND

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                034738

              
	
                063255

              	 
      	 
      	 
      	
                MIDKIFF
      TRACT 6

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MIDLAND

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                015254

              
	
                553435

              	 
      	 
      	 
      	
                S
      DRIVER U TR 51A

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MIDLAND

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                015400

              
	
                554233

              	 
      	 
      	 
      	
                S
      DRIVER UT TR 52B

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MIDLAND

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                015400

              
	
                553232

              	 
      	 
      	 
      	
                S
      DRIVER UT TR 890

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MIDLAND

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                015400

              
	
                054491

              	 
      	 
      	 
      	
                SDU
      27A

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MIDLAND

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.9000)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                015400

              
	
                554422

              	 
      	 
      	 
      	
                SDU
      48A

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MIDLAND

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.9000)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                015400

              
	
                554430

              	 
      	 
      	 
      	
                SOU
      50A

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MIDLAND

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.9000)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                015400

              
	
                554404

              	 
      	 
      	 
      	
                SDU
      53A

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MIDLAND

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                015400

              
	
                554475

              	 
      	 
      	 
      	
                SDU
      55A

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MIDLAND

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.9000)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                015400

              
	
                064317‡

              	 
      	 
      	 
      	
                TURNER
      J

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN MIDLAND

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                033428

              
	
                128754

              	 
      	 
      	 
      	
                ATKINSON
      B & WHITEHOUSE"

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN REAGAN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                6441

              
	
                128753

              	 
      	 
      	 
      	
                ATKINSON,
      W.B. A

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN REAGAN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                014074

              
	
                128755

              	 
      	 
      	 
      	
                CAUBLE,
      E.G. K

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN REAGAN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                014070

              
	
                128758

              	 
      	 
      	 
      	
                CAUBLE,
      E.G. L

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN REAGAN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                014071

              
	
                059834

              	 
      	 
      	 
      	
                MERCHANT
      39-S

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN REAGAN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004426

              
	
                059660

              	 
      	 
      	 
      	
                MERCHANT
      46S

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN REAGAN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004426

              

      

      
        
           

        

        
           

          
            

          

        

        
           

        

      

      Exhibit
"A"

      

      Sep 04,
2009

      Page 12
of 13

      

      
        	
                Plains
      contract:

              	 
      	
                2582-1013

              	 
      	
                Effective:
      09-01-2009

              	 
      	
                Plains
      Marketing L.P.

              

      

      

      
        	
                
                  
                    PM

                    Lease

                    ‡=inact

                  

                

              	 
      	 
      	 
      	
                Lease

              	 
      	
                Operator

              	 
      	
                County/Parish

              	 
      	 
      	 
      	
                Price

              	 
      	
                Price

                Method

              	 
      	
                Applicable

                Premium

                or

                (Deduct)

              	 
      	
                Fuel

                Adjust

              	 
      	
                Percent

              	 
      	
                Gravity

              	 
      	
                State

                Lease

              
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
                059661

              	 
      	 
      	 
      	
                MERCHANT
      47S

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN REAGAN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004426

              
	
                055425

              	 
      	 
      	 
      	
                MERCHANT
      5502N

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN REAGAN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004426

              
	
                052821

              	 
      	 
      	 
      	
                MERCHANT
      TR 4404A

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN REAGAN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004426

              
	
                054022

              	 
      	 
      	 
      	
                MERCHANT
      TR 53K

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN REAGAN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004426

              
	
                098176

              	 
      	 
      	 
      	
                MERCHANT
      UNIT

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN REAGAN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004426

              
	
                055467

              	 
      	 
      	 
      	
                MERCHANT
      UNIT TR 3702 N

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN REAGAN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004426

              
	
                059645

              	 
      	 
      	 
      	
                MERCHANT
      UT 40-S

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN REAGAN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004426

              
	
                052797

              	 
      	 
      	 
      	
                MERCHANT
      UT TR #3803A

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN REAGAN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004426

              
	
                052796

              	 
      	 
      	 
      	
                MERCHANT
      UT TR #5104A

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN REAGAN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004426

              
	
                052802

              	 
      	 
      	 
      	
                MERCHANT
      UT TR#5202A

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN REAGAN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004426

              
	
                052803

              	 
      	 
      	 
      	
                MERCHANT
      UT TR #6207A

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN REAGAN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004426

              
	
                059542

              	 
      	 
      	 
      	
                MERCHANTS
      63S

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN REAGAN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004426

              
	
                062771

              	 
      	 
      	 
      	
                MERCHANTS
      6403-A

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN REAGAN

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004426

              
	
                092782‡

              	 
      	 
      	 
      	
                CONNELL
      #1 & #2

              	 
      	
                PIONEER
      NATURAL RESOURCE

              	 
      	
                UPTON

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                144253

              
	
                097748

              	 
      	 
      	 
      	
                CONNELL
      B #1, #3, #4

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN UPTON

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004414

              
	
                097752

              	 
      	 
      	 
      	
                COWDEN
      B

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN UPTON

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004382

              
	
                076667

              	 
      	
                (6)

              	 
      	
                HIRSCH
      E #1

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN UPTON

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004223

              
	
                064315

              	 
      	
                (6)

              	 
      	
                HIRSCH
      E #4

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN UPTON

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004223

              
	
                064323

              	 
      	
                (7)

              	 
      	
                HIRSCH
      F #2, 5 & 6

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN UPTON

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004254

              
	
                076668

              	 
      	
                (7)

              	 
      	
                HIRSCH
      F #4

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN UPTON

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004254

              
	
                119109

              	 
      	
                (7)

              	 
      	
                HIRSCH
      F 10

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN UPTON

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004254

              
	
                119107

              	 
      	
                (7)

              	 
      	
                HIRSCH
      F 8

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN UPTON

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004254

              
	
                119108

              	 
      	
                (7)

              	 
      	
                HIRSCH
      F 9

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN UPTON

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004254

              
	
                064319

              	 
      	 
      	 
      	
                LINK
      #8

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN UPTON

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                004039

              
	
                097630

              	 
      	 
      	 
      	
                N
      PEMBROOK SPRA UNIT #79

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN UPTON

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                003913

              
	
                059800

              	 
      	 
      	 
      	
                NPSU
      TRACT 28 A

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN UPTON

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                003913

              
	
                059616

              	 
      	 
      	 
      	
                NPSU
      TRACT 54A

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN UPTON

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                003913

              
	
                059617

              	 
      	 
      	 
      	
                NPSU
      TRACT 55A

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN UPTON

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                003913

              
	
                059615

              	 
      	 
      	 
      	
                NPSU
      TRACT 57A

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN UPTON

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                003913

              
	
                059612

              	 
      	 
      	 
      	
                NPSU
      TRACT 74A

              	 
      	
                PIONEER
      NATURAL RES

              	 
      	
                USA
      IN UPTON

              	 
      	
                TX

              	 
      	
                X1585

              	 
      	
                EDQ

              	 
      	
                ($0.5500)

              	 
      	
                $0.0000

              	 
      	
                100.00000%

              	 
      	
                Flat

              	 
      	
                003913

              

      

       

    

    
      
         

      

      
         

        
          

        

      

      
         

      

    

    

    
      Exhibit
"A"

      

      Sep 04,
2009

      Page 13
of 13

      

      
        	
                Plains
      contract:

              	 
      	
                2582-1013

              	 
      	
                Effective:
      09-01-2009

              	 
      	
                Plains
      Marketing L.P.

              

      

       

    

    
      	
              
                
                  PM

                  Lease

                  ‡=inact

                

              

            	 
      	 
      	 
      	
              Lease

            	 
      	
              Operator

            	 
      	
              County/Parish

            	 
      	 
      	 
      	
              Price

            	 
      	
              Price
      Method

            	 
      	
              Applicable

              Premium

              Or

              (Deduct)

            	 
      	
              Fuel

              Adjust

            	 
      	
              Percent

            	 
      	
              Gravity

            	 
      	
              State

              Lease

            
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	
              059613

            	 
      	 
      	 
      	
              NPSU
      TRACT 75A

            	 
      	
              PIONEER
      NATURAL RES USA IN

            	 
      	
              UPTON

            	 
      	
              TX

            	 
      	
              X1585

            	 
      	
              EDQ

            	 
      	
              ($0.5500)

            	 
      	
              $0.0000

            	 
      	
              100.00000%

            	 
      	
              Flat

            	 
      	
              003913

            
	
              059614

            	 
      	 
      	 
      	
              MPSU
      TRACT 79A

            	 
      	
              PIONEER
      NATURAL RES USA IN

            	 
      	
              UPTON

            	 
      	
              TX

            	 
      	
              X1585

            	 
      	
              EDQ

            	 
      	
              ($0.5500)

            	 
      	
              $0.0000

            	 
      	
              100.00000%

            	 
      	
              Flat

            	 
      	
              003913

            
	
              064447

            	 
      	 
      (21)	 
      	
              PEMBROOK
      UNIT TR 1

            	 
      	
              PIONEER
      NATURAL RES USA IN

            	 
      	
              UPTON

            	 
      	
              TX

            	 
      	
              X1585

            	 
      	
              EDQ

            	 
      	
              ($0.5500)

            	 
      	
              $0.0000

            	 
      	
              4.86624

            	 
      	
              Flat

            	 
      	
              5497

            
	
              064449

            	 
      	(21)	 
      	
              PEMBROOK
      UNIT TR 11

            	 
      	
              PIONEER
      NATURAL RES USA IN

            	 
      	
              UPTON

            	 
      	
              TX

            	 
      	
              X1585

            	 
      	
              EDQ

            	 
      	
              ($0.5500)

            	 
      	
              $0.0000

            	 
      	
              9.73248

            	 
      	
              Flat

            	 
      	
              5497

            
	
              064450

            	 
      	(21)	 
      	
              PEMBROOK
      UNIT TR 12

            	 
      	
              PIONEER
      NATURAL RES USA IN

            	 
      	
              UPTON

            	 
      	
              TX

            	 
      	
              X1585

            	 
      	
              EDQ

            	 
      	
              ($0.5500)

            	 
      	
              $0.0000

            	 
      	
              9.73248

            	 
      	
              Flat

            	 
      	
              5497

            
	
              064448

            	 
      	(21)	 
      	
              PEMBROOK
      UNIT TR 2

            	 
      	
              PIONEER
      NATURAL RES USA IN

            	 
      	
              UPTON

            	 
      	
              TX

            	 
      	
              X1585

            	 
      	
              EDQ

            	 
      	
              ($0.5500)

            	 
      	
              $0.0000

            	 
      	
              9.73248

            	 
      	
              Flat

            	 
      	
              5497

            
	
              064451

            	 
      	(21)	 
      	
              PEMBROOK
      UNIT TR 22

            	 
      	
              PIONEER
      NATURAL RES USA IN

            	 
      	
              UPTON

            	 
      	
              TX

            	 
      	
              X1585

            	 
      	
              EDQ

            	 
      	
              ($0.5500)

            	 
      	
              $0.0000

            	 
      	
              4.86624

            	 
      	
              Flat

            	 
      	
              5497

            
	
              064452

            	 
      	(21)	 
      	
              PEMBROOK
      UNIT TR 28

            	 
      	
              PIONEER
      NATURAL RES USA IN

            	 
      	
              UPTON

            	 
      	
              TX

            	 
      	
              X1585

            	 
      	
              EDQ

            	 
      	
              ($0.5500)

            	 
      	
              $0.0000

            	 
      	
              4.86624

            	 
      	
              Flat

            	 
      	
              5497

            
	
              064453

            	 
      	(21)	 
      	
              PEMBROOK
      UNIT TR 29

            	 
      	
              PIONEER
      NATURAL RES USA IN

            	 
      	
              UPTON

            	 
      	
              TX

            	 
      	
              X1585

            	 
      	
              EDQ

            	 
      	
              ($0.5500)

            	 
      	
              $0.0000

            	 
      	
              4.86624

            	 
      	
              Flat

            	 
      	
              5497

            
	
              064454

            	 
      	(21)	 
      	
              PEMBROOK
      UNIT TR 30

            	 
      	
              PIONEER
      NATURAL RES USA IN

            	 
      	
              UPTON

            	 
      	
              TX

            	 
      	
              X1585

            	 
      	
              EDQ

            	 
      	
              ($0.5500)

            	 
      	
              $0.0000

            	 
      	
              7.29936

            	 
      	
              Flat

            	 
      	
              5497

            
	
              064455

            	 
      	(21)	 
      	
              PEMBROOK
      UNIT TR 31

            	 
      	
              PIONEER
      NATURAL RES USA IN

            	 
      	
              UPTON

            	 
      	
              TX

            	 
      	
              X1585

            	 
      	
              EDQ

            	 
      	
              ($0.5500)

            	 
      	
              $0.0000

            	 
      	
              2.43312

            	 
      	
              Flat

            	 
      	
              5497

            
	
              064456

            	 
      	(21)	 
      	
              PEMBROOK
      UNIT TR 33

            	 
      	
              PIONEER
      NATURAL RES USA IN

            	 
      	
              UPTON

            	 
      	
              TX

            	 
      	
              X1585

            	 
      	
              EDQ

            	 
      	
              ($0.5500)

            	 
      	
              $0.0000

            	 
      	
              2.43491

            	 
      	
              Flat

            	 
      	
              5497

            
	
              064457

            	 
      	(21)	 
      	
              PEMBROOK
      UNIT TR 34

            	 
      	
              PIONEER
      NATURAL RES USA IN

            	 
      	
              UPTON

            	 
      	
              TX

            	 
      	
              X1585

            	 
      	
              EDQ

            	 
      	
              ($0.5500)

            	 
      	
              $0.0000

            	 
      	
              2.43312

            	 
      	
              Flat

            	 
      	
              5497

            
	
              064458

            	 
      	(21)	 
      	
              PEMBROOK
      UNIT TR 36

            	 
      	
              PIONEER
      NATURAL RES USA IN

            	 
      	
              UPTON

            	 
      	
              TX

            	 
      	
              X1585

            	 
      	
              EDQ

            	 
      	
              ($0.5500)

            	 
      	
              $0.0000

            	 
      	
              .24027

            	 
      	
              Flat

            	 
      	
              5497

            
	
              064459

            	 
      	(21)	 
      	
              PEMBROOK
      UNIT TR 59

            	 
      	
              PIONEER
      NATURAL RES USA IN

            	 
      	
              UPTON

            	 
      	
              TX

            	 
      	
              X1585

            	 
      	
              EDQ

            	 
      	
              ($0.5500)

            	 
      	
              $0.0000

            	 
      	
              9.73248

            	 
      	
              Flat

            	 
      	
              5497

            
	
              064460

            	 
      	(21)	 
      	
              PEMBROOK
      UNIT TR 60

            	 
      	
              PIONEER
      NATURAL RES USA IN

            	 
      	
              UPTON

            	 
      	
              TX

            	 
      	
              X1585

            	 
      	
              EDQ

            	 
      	
              ($0.5500)

            	 
      	
              $0.0000

            	 
      	
              1.21656

            	 
      	
              Flat

            	 
      	
              5497

            
	
              064461

            	 
      	(21)	 
      	
              PEMBROOK
      UNIT TR 63

            	 
      	
              PIONEER
      NATURAL RES USA IN

            	 
      	
              UPTON

            	 
      	
              TX

            	 
      	
              X1585

            	 
      	
              EDQ

            	 
      	
              ($0.5500)

            	 
      	
              $0.0000

            	 
      	
              3.64968

            	 
      	
              Flat

            	 
      	
              5497

            
	
              064465

            	 
      	(21)	 
      	
              PEMBROOK
      UNIT TR 64

            	 
      	
              PIONEER
      NATURAL RES USA IN

            	 
      	
              UPTON

            	 
      	
              TX

            	 
      	
              X1585

            	 
      	
              EDQ

            	 
      	
              ($0.5500)

            	 
      	
              $0.0000

            	 
      	
              9.73248

            	 
      	
              Flat

            	 
      	
              5497

            
	
              064462

            	 
      	(21)	 
      	
              PEMBROOK
      UNIT TR 72

            	 
      	
              PIONEER
      NATURAL RES USA IN

            	 
      	
              UPTON

            	 
      	
              TX

            	 
      	
              X1585

            	 
      	
              EDQ

            	 
      	
              ($0.5500)

            	 
      	
              $0.0000

            	 
      	
              4.86624

            	 
      	
              Flat

            	 
      	
              5497

            
	
              064463

            	 
      	(21)	 
      	
              PEMBROOK
      UNIT TR 77

            	 
      	
              PIONEER
      NATURAL RES USA IN

            	 
      	
              UPTON

            	 
      	
              TX

            	 
      	
              X1585

            	 
      	
              EDQ

            	 
      	
              ($0.5500)

            	 
      	
              $0.0000

            	 
      	
              7.29936%

            	 
      	
              Flat

            	 
      	
              5497

            
	
              007395

            	 
      	(5)	 
      	
              WINDHAM
      T #1 & 2

            	 
      	
              PIONEER
      NATURAL RES USA IN

            	 
      	
              UPTON

            	 
      	
              TX

            	 
      	
              X1585

            	 
      	
              EDQ

            	 
      	
              ($0.5500)

            	 
      	
              $0.0000

            	 
      	
              100.00000%

            	 
      	
              Flat

            	 
      	
              003901

            
	
              064314

            	 
      	(5)	 
      	
              WINDHAM
      T #3

            	 
      	
              PIONEER
      NATURAL RES USA IN

            	 
      	
              UPTON

            	 
      	
              TX

            	 
      	
              X1585

            	 
      	
              EDQ

            	 
      	
              ($0.5500)

            	 
      	
              $0.0000

            	 
      	
              100.00000%

            	 
      	
              Flat

            	 
      	
              003901

            
	
              119105

            	 
      	(5)	 
      	
              WINDHAM
      T 4

            	 
      	
              PIONEER
      NATURAL RES USA IN

            	 
      	
              UPTON

            	 
      	
              TX

            	 
      	
              X1585

            	 
      	
              EDQ

            	 
      	
              ($0.5500)

            	 
      	
              $0.0000

            	 
      	
              100.00000%

            	 
      	
              Flat

            	 
      	
              003901

            
	
              119106

            	 
      	(5)	 
      	
              WINDHAM
      T 5

            	 
      	
              PIONEER
      NATURAL RES USA IN

            	 
      	
              UPTON

            	 
      	
              TX

            	 
      	
              X1585

            	 
      	
              EDQ

            	 
      	
              ($0.5500)

            	 
      	
              $0.0000

            	 
      	
              100.00000%

            	 
      	
              Flat

            	 
      	
              003901

            

    

     

    
      
         

      

      
         

        
          

        

      

      
         

      

    

    

    
      
        Exhibit
"A"

        

        Sep 04,
2009

        Page 1
of 1

        
          Plains
Marketing L.P.

        

        
          	
                  Plains
      contract:

                	 
      	
                  2582-1013

                	 
      	
                  Effective:
      09-01-2009

                	 
      	
                   

                

        

         

      

    

    
      
        	
                PM

                Lease

              	 
      	 
      	 
      	
                Lease

              	 
      	
                Operator

              	 
      	
                County/Parish

              	 
      	
                State

              	 
      	
                Price
      Code*

              	 
      	
                Price
      Method**

              	 
      	
                Applicable

                Deduct/

                Premium

              	 
      	
                 

              	 
      	
                Percent

              	 
      	
                Gravity

              	 
      	
                State

                Lease

              
	 	 	 	 	 	 	 
	 
      	 
      	
                (1)

              	 
      	
                Allocated
      under 088859 MABEE K

              	 
      	
                (*)   
      X1585
      SPECIAL POSTING-CNXSSH+RLL+PMID-NETPWTS/MID/14

              
	 
      	 
      	
                (2)

              	 
      	
                Allocated
      under 089029 WELCH G

              	 
      	
                (**) 
      EQUAL
      DAILY QUANTITIES

              
	 
      	 
      	
                (3)

              	 
      	
                Allocated
      under 089054 WELCH & WELCH

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	
                (4)

              	 
      	
                Allocated
      under 890186 MCCLINTIC D & H STORAGE

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	
                (5)

              	 
      	
                Allocated
      under 890195 WINDHAM T #1 & #2

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	
                (6)

              	 
      	
                Allocated
      under 890196 HIRSCH E STORAGE

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	
                (7)

              	 
      	
                Allocated
      under 890199 HIRSCH F STORAGE

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	
                (8)

              	 
      	
                Allocated
      under 994628 MCCLINTIC E, G & J STORAGE

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	
                (9)

              	 
      	
                Allocated
      under 994947 PIONEER CENTRAL LACT

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	
                (10)

              	 
      	
                Allocated
      under 994948 SCHARBAUER C BRY STORAGE

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	
                (11)

              	 
      	
                Allocated
      under 994949 NORTH CURTIS BTY STORAGE

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	
                (12)

              	 
      	
                Allocated
      under 994950 DOVE Z BTY STORAGE

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	
                (13)

              	 
      	
                Allocated
      under 994951 CURTIS RSW BTY STORAGE

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	
                (14)

              	 
      	
                Allocated
      under 994997 MABEE BATTERY STORAGE

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	
                (15)

              	 
      	
                Allocated
      under 995418 DICKENSON STORAGE

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	
                (16)

              	 
      	
                Allocated
      under 995657 WOODY J#1 & #2

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	
                (17)

              	 
      	
                Allocated
      under 995846 GLASS RANCE CONSOLIDATED BATT

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	
                (18)

              	 
      	
                Allocated
      under 995864 ELMA L SLAUGHTER B STORAGE

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	
                (19)

              	 
      	
                Allocated
      under 995991 ASHLEY/LEONARD A STORAGE

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	
                (20)

              	 
      	
                Allocated
      under 995995 DAVENPORT RS A/A/B STORAGE

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	
                (21)

              	 
      	
                Allocated
      under 999514 PEMBROOK UNIT

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      
	 
      	 
      	
                (22)

              	 
      	
                Allocated
      under 999595 MCCLINTIC E & F STORAGEUnassociated Document

    
      
        
          
            
              
                
                  
                    

                  

                

                Exhibit 10.23

                 

                
                  	 	
                           Occidental
      Energy Marketing, Inc.

                        	
                          5
      Greenways Plaza, Suite 110, Houston, Texas 77046-0521

                          P.O.
      Box 27570, Houston, Texas 77227-7570

                          Phone
      713.215.7000

                        
	 	
                          A
      subsidiary of Occidental Petroleum Corporation

                        	 
      

                

                 

                AMENDMENT

                

                 

                TO:    DEB
STEWART - PIONEER NATURAL RESOURCES USA, INC. - FAX NUMBER (972)
969-3574

                 

                FROM:
MARK HAFNER - OCCIDENTAL ENERGY MARKETING, INC. - FAX NUMBER (713)
985-1815

                 

                
                  	
                          RE: 

                        	
                          OCCIDENTAL
      CONTRACT #0403-PNR-13603-P#1

                        

                

                PIONEER
CONTRACT #OIL-10442

                 

                EFFECTIVE
MAY 1, 2005, OCCIDENTAL AND PIONEER AMEND THE PRICE AND TERM OF THIS CONTRACT
WHEREBY OCCIDENTAL BUYS APPROXIMATELY 1,800 BARRELS PER DAY OF WTI CRUDE OIL
FROM PIONEER TO THE FOLLOWING:

                 

                PRICE: FORMULA PRICE: THE
PRICE HAS THREE COMPONENTS - BASE PRICE PLUS/MINUS ROLL COMPONENT MINUS CUSHING
WTI/MIDLAND WTI SPREAD MINUS LOCATION DIFFERENTIAL.

                 

                BASE PRICE - THE BASE PRICE
SHALL BE THE AVERAGE OF THE MERC SETTLEMENT PRICE DURING THE CALENDAR MONTH OF
THE DELIVERY MONTH. WEEKENDS AND HOLIDAYS SHALL CARRY THE PRICE OF THE PREVIOUS
MERC SETTLEMENT PRICE.

                 

                ROLL COMPONENT - THE
SETTLEMENT PRICES SHALL BE AVERAGED FOR THE ENTIRE MERC TRADE MONTH WHILE
THE DELIVERY MONTH IS THE MERC PROMPT MONTH. THE MONTHS AVERAGED SHALL BE THE
PROMPT (DELIVERY) MONTH AND THE NEXT TWO MONTHS. THE ROLL COMPONENT FOR THE
PROMPT MONTH/SECOND MONTH SHALL BE THE DIFFERENCE BETWEEN THE PROMPT MONTH
AVERAGE MINUS THE SECOND MONTH AVERAGE TIMES A DECIMAL FACTOR DETERMINED BY
DIVIDING THE NUMBER OF CALENDAR DAYS IN THE DELIVERY MONTH THAT THE SECOND MONTH
TRADES ON THE MERC BY THE NUMBER OF CALENDAR DAYS IN THE DELIVERY MONTH. THE
ROLL COMPONENT FOR THE PROMPT MONTH/THIRD MONTH SHALL BE THE DIFFERENCE BETWEEN
THE PROMPT MONTH AVERAGE MINUS THE THIRD MONTH AVERAGE TIMES A DECIMAL FACTOR
THAT IS ONE (1) MINUS THE DECIMAL FACTOR FOR THE PROMPT MONTH/SECOND MONTH. IF
THE SECOND MONTH MERC TRADING IN THE DELIVERY MONTH EXPIRES ON A FRIDAY, THEN
THE WEEKEND AND ANY HOLIDAYS SHALL BE DEEMED AS SECOND MONTH DAYS FOR
DETERMINING THE DECIMAL FACTOR FOR THE PROMPT MONTH/SECOND MONTH.

                 

                CUSHING WTI/MIDLAND WTI SPREAD
- PLATTS DAILY HIGH/LOW AVERAGE FOR WTI CUSHING MINUS PLATTS DAILY
HIGH/LOW AVERAGE FOR MIDLAND WTI IS THE DAILY WTI/WTI SPREAD. NOTE: ALL PLATTS
PRICING IS FOR THE DELIVERY MONTH AS PUBLISHED BY PLATTS DURING THE PERIOD
BEGINNING ON THE 26th OF
THE SECOND MONTH PROCEEDING THE DELIVERY MONTH AND ENDING ON THE 25th OF
THE SECOND MONTH PROCEEDING THE DELIVERY MONTH.

                 

                LOCATION DIFFERENTIAL - THIS
IS THE LOCATION DIFFERENTIAL RATE, WHICH INCLUDES WITHOUT LIMITATION
TRANSPORTATION COSTS AND OTHER APPLICABLE TARIFF RATES, FEES AND COSTS, IN
DOLLARS PER BARREL THAT HAS BEEN ESTABLISHED FOR EACH OF THE INDIVIDUAL
PROPERTIES ON THE CONTRACT EXHIBIT A.

                 

                TERM: MAY 1, 2005 THROUGH
DECEMBER 31, 2012. OCCIDENTAL IN ITS SOLE DISCRETION AND UPON SIXTY (60) DAYS
PRIOR WRITTEN NOTICE TO PIONEER, SHALL HAVE THE RIGHT TO MAKE ADJUSTMENTS TO THE
LOCATION DIFFERENTIAL ONCE EACH CALENDAR YEAR. WITHIN FIFTEEN (15) DAYS AFTER
THE DATE OF SUCH NOTICE PIONEER SHALL PROVIDE WRITTEN CONFIRMATION OF ACCEPTANCE
OR REJECTION OF THE ADJUSTED LOCATION DIFFERENTIAL. IF THE PARTIES DO NOT
MUTUALLY AGREE TO AN ADJUSTED LOCATION DIFFERENTIAL BY THE END OF THE
SIXTY-DAY

                
                  
                     

                  

                  
                     

                    
                      

                    

                  

                  
                     

                  

                

                 

                PERIOD,
EITHER PARTY MAY TERMINATE THIS AGREEMENT UPON SIXTY (60) DAYS PRIOR WRITTEN
NOTICE.

                 

                ENCLOSED
PLEASE FIND THE EXHIBIT "A" TO THE ABOVE-REFERENCED CONTRACT. WE APPRECIATE YOUR
BUSINESS AND LOOK FORWARD TO OTHER BUSINESS IN THE FUTURE.

                 

                 

                
                  	
                          APPROVED
      BY:

                        	
                          /s/
      John t.
      mcwhorter

                        	 
      
	 
      	
                          John
      t. mcwhorter

                        	 
      
	 
      	
                          occidental
      energy marketing, inc.

                        	 
      
	 
      	 
      	 
      
	
                          APPROVED
      BY:

                        	
                          /s/ Hershal K.
      Wolfe

                        	 
      
	 
      	
                          pioneer
      natural resources usa, inc.

                        	 
      
	 
      	
                          Hershal
      K. Wolfe

                        	 
      
	 
      	
                          Director
      of Marketing

                        	 
      

                

                 

                
                  
                     

                  

                  
                     

                    
                      

                    

                  

                  
                     

                  

                

                 

                EXHIBIT
"A"

                
                   
OEMI'S
Contract #0403-PNR-13603-P#1

                

                
                   
Contract

                

                Allegro
Contract #119321 (formerly 114658)

                 

                
                  	
                          Crude
      Type

                        	 
      	
                          Transporter

                        	 
      	
                          Start
      Date

                        	 
      	
                          Carrier

                          Lease
      ID #

                        	 
      	
                          EMOCRC

                        	 
      	
                          RPC

                        	 
      	
                          DO

                        	 
      	
                          Decimal

                        	 
      	
                          Contract
      fl

                        	 
      	
                          Operator

                        	 
      	
                          Lease
      Name

                        	 
      	
                          OXY
      ALLEGO LEASE NAME

                        	 
      	
                          OXY
      Lease #

                        	 
      	
                          County

                        	 
      	
                          State

                        	 
      	
                          B/D

                        	 
      	
                          Differential

                        
	
                          WTI

                        	 
      	
                          Genesis
      Trks

                        	 
      	
                          03/01/2004

                        	 
      	
                          53898

                        	 
      	
                          56377

                        	 
      	
                          56377

                        	 
      	
                          75451

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      SPRABERRY TR 1

                        	 
      	
                          PRESTON
      SPRABERRY TR 1

                        	 
      	
                          742055350001PITS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          1

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Genesis
      Trks

                        	 
      	
                          03/01/2004

                        	 
      	
                          53399

                        	 
      	
                          55583

                        	 
      	
                          76617

                        	 
      	
                          75046

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      SPRABERRY DEAN TR 19 A

                        	 
      	
                          PRESTON
      SPRBY DEAN TR 19 A

                        	 
      	
                          74205535019APITS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          36

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Genesis
      Trks

                        	 
      	
                          03/01/2004

                        	 
      	
                          52546

                        	 
      	
                          55583

                        	 
      	
                          68287

                        	 
      	
                          75068

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      SPRABERRY DEAN TR 41

                        	 
      	
                          PRESTON
      SPRBY DEAN TR 41

                        	 
      	
                          742055350041PITS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          3

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          291036

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 20B

                        	 
      	
                          PRESTON
      SPRABERRY UT

                        	 
      	
                          742055350208PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          7

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          841253

                        	 
      	
                          56377

                        	 
      	
                          65563

                        	 
      	
                          75450

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      SPRABERRY UNIT PSU CB

                        	 
      	
                          PRESTON
      SPRABERRY UT PSU-C.B.

                        	 
      	
                          7420553500CBPIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          57

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200006

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 15

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 15

                        	 
      	
                          742055350015PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          34

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200007

                        	 
      	
                          55563

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 16

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 16

                        	 
      	
                          742055350016PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          27

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          251054

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 28

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 28

                        	 
      	
                          742055350028PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          22

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200031

                        	 
      	
                          56377

                        	 
      	
                          60638

                        	 
      	
                          75453

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 32A

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 32A

                        	 
      	
                          74205535032APIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          23

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200031

                        	 
      	
                          56377

                        	 
      	
                          60638

                        	 
      	
                          75453

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 3

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 32A

                        	 
      	
                          74205535032APIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          6

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200003

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 11

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 11

                        	 
      	
                          742055350011PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          33

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200004

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1
      00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 12A

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 12A

                        	 
      	
                          74205535012APIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          12

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200005

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 14

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 14

                        	 
      	
                          742055350014PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          32

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200006

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 17

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 17

                        	 
      	
                          742055350017PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          77

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200009

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 18

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 18

                        	 
      	
                          742055350018PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          50

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          251057

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 20

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 20

                        	 
      	
                          742055350020PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          25

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200011

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 21

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 21

                        	 
      	
                          742055350021
      PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          100

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200013

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 21B

                        	 
      	
                          PRESTON
      SPRABERRY UTTR21B

                        	 
      	
                          74205535021BPIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          34

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200012

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 22

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 22

                        	 
      	
                          742055350022PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          14

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200014

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 23B

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 23B

                        	 
      	
                          74205535023BPIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          21

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200015

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 24

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 24

                        	 
      	
                          742055350024PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          19

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200016

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 25

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 25

                        	 
      	
                          742055350025PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          47

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200017

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 28

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 26

                        	 
      	
                          742055350026PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          64

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200016

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 27

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 27

                        	 
      	
                          742055350027PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          15

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          251062

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 29

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 29

                        	 
      	
                          742055350029PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          48

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          251066

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 30

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 30

                        	 
      	
                          742055350030PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          33

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          251055

                        	 
      	
                          55583

                        	 
      	
                          55563

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 31

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 31

                        	 
      	
                          742055350031PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          38

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          845316

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 31B

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 31B

                        	 
      	
                          74205535031
      BPIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          39

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200019

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 33

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 33

                        	 
      	
                          742055350033PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          91

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200020

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 33B

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 33B

                        	 
      	
                          74205535033BPIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          26

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200021

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 34

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 34

                        	 
      	
                          742055350034PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          40

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200022

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 34A

                        	 
      	
                          PRESTON
      SPRABERRY UTTR34A

                        	 
      	
                          74205535034APIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          79

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200023

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 34B

                        	 
      	
                          PRESTON
      SPRABERRY UTTR34B

                        	 
      	
                          74205535034BPIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          11

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          845753

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 37-10

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 37A

                        	 
      	
                          74205535037APIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          8

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          251045

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 38

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 38

                        	 
      	
                          742055350038PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          31

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          251046

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 39

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 39

                        	 
      	
                          742055350039PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          83

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          251053

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 40

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 40

                        	 
      	
                          742055350040PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          56

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          845755

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 40B

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 40B

                        	 
      	
                          74205535040BPIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          7

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          251056

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 41

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 41

                        	 
      	
                          742055350041PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          248

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          251043

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 42

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 42

                        	 
      	
                          7420553500034PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          34

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200024

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 43A

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 43A

                        	 
      	
                          74205535043APIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          B4

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200026

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 44

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 44

                        	 
      	
                          742055350C44PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          24

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200027

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 44 B

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 44 B

                        	 
      	
                          74205535044BPIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          7

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200028

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 45

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 45A

                        	 
      	
                          74205535045APIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          42

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200029

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 45B

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 45B

                        	 
      	
                          74205535045BPIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          13

                        	 
      	
                          0.60

                        
	
                          
                            WTI

                          

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200030

                        	 
      	
                          58377

                        	 
      	
                          60838

                        	 
      	
                          75454

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 4 (46A)

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 46A

                        	 
      	
                          74205535046APIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          9

                        	 
      	
                          060

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200002

                        	 
      	
                          58377

                        	 
      	
                          60837

                        	 
      	
                          75452

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC

                        	 
      	
                          PRESTON
      SPRABERRY UNIT TR 7

                        	 
      	
                          PRESTON
      SPRABERRY UT-7

                        	 
      	
                          74205535O0O7PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          4

                        	 
      	
                          0.60

                        
	
                          WTI

                        	 
      	
                          Centurion
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          298808

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC

                        	 
      	
                          PRESTON
      DEAN SPBY UNIT TR 37B

                        	 
      	
                          TXL
      -M- PRESTON SPBY UT 298808

                        	 
      	
                          74205535037BPIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          18
      

                        	 
      	
                          0.60

                        
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 1816	 	 

                

                 

                
                  
                     

                  

                  
                     

                    
                      

                    

                  

                  
                     

                  

                

                 

                
                  	 	
                          Occidental
      Energy Marketing, Inc.

                        	
                          5
      Greenway Plaza, Suite 110, Houston, Texas 77046-0521

                          P.O.
      Box 27570, Houston, Texas 77227-7570

                          Phone
      713.215.7000

                        
	 	
                          A
      subsidiary of Occidental Petroleum Corporation

                        	 
      

                

                

                VIA FAX:
972-969-3574

                 

                
                  	
                        	
                          TO:

                        	
                          DEB
      STEWART - PIONEER NATURAL RESOURCES USA, INC. - PHONE
      972-969-3855

                        

                

                 

                
                  	
                        	
                          FROM:

                        	
                          MARK
      HAFNER- OCCIDENTAL ENERGY MARKETING, INC. - PHONE
    432-685-5884

                        

                

                

                
                  	
                        	
                          REFERENCE: 

                        	
                          OCCIDENTAL CONTRACT NUMBER:
      0403-PNR-13603-P

                        

                

                PIONEER
NATURAL RESOURCES USA, INC. CONTRACT NUMBER:

                 

                THIS FAX
CONFIRMS THE AGREEMENT BETWEEN DEB STEWART OF PIONEER NATURAL RESOURCES USA,
INC. AND MARK HAFNER OF OCCIDENTAL ENERGY MARKETING, INC. ON FEBRUARY 1, 2004.
THE FOLLOWING DETAILS ARE OCCIDENTAL'S UNDERSTANDING:

                 

                
                  	
                        	
                          SELLER:

                        	
                          PIONEER
      NATURAL RESOURCES USA, INC.
("PIONEER")

                        

                

                
                  	
                        	
                          BUYER:

                        	
                          OCCIDENTAL
      ENERGY MARKETING, INC.
("OCCIDENTAL")

                        

                

                 

                
                  
                    	
                          	
                            1.

                          	
                            VOLUME:     APPROXIMATELY
      1,816 BARRELS PER DAY EXACT VOLUME EQUAL TO THE PRODUCTION FROM THE LEASES
      ON ATTACHED EXHIBIT "A"

                          

                  

                

                 

                
                  	
                        	
                          2.

                        	
                          QUALITY/GRADE:     WEST
      TEXAS INTERMEDIATE

                        

                

                 

                
                  	
                        	
                          3. 

                        	
                           DELIVERY
      POINT:     TITLE AND RISK OF LOSS SHALL
      PASS FROM PIONEER TO OCCIDENTAL AS THE CRUDE OIL ENTERS THE FACILITIES OF
      TROJAN PIPELINE AND OCCIDENTAL'S DESIGNATED
  TRUCKER.

                        

                

                 

                
                  	
                        	
                          4.
    

                        	
                          TERM:     MARCH  1-
      31, 2004 AND  CONTINUING MONTH TO MONTH THEREAFTER
      SUBJECT TO A 30 DAY ADVANCE WRITTEN NOTICE OF CANCELLATION BY EITHER
      PARTY.

                        

                

                 

                
                  	
                        	
                          5.
    

                        	
                          PRICE:     OXY
      AGREES TO PAY PIONEER A PRICE PER BARREL EQUAL
  TO

                        

                

                ONE OF
THE THREE PRICING FORMULAS DESCRIBED BELOW. PIONEER SHALL HAVE THE RIGHT TO
ELECT WHICH PRICING FORMULA IS USED ON A QUARTERLY BASIS. PIONEER SHALL NOTIFY
OXY IN WRITING AT LEAST FIVE (5) DAYS PRIOR TO THE BEGINNING OF THE FIRST NYMEX
TRADING MONTH OF ANY QUARTER. THE QUARTERLY PRICING FORMULA WILL DEFAULT TO THE
PRECEDING QUARTER'S PRICING FORMULA IF PIONEER NEGLECTS TO NOTIFY OXY BY FIVE
(5) DAYS PRIOR TO THE BEGINNING OF THE NYMEX TRADING MONTH FOR ANY GIVEN
QUARTER.

                 

                IT IS
HEREBY AGREED THAT PRICING FORMULA 3 WILL BE USED FOR MARCH 2004 AND WILL BE
USED FOR THE REMAINDER OF THE SECOND QUARTER OF 2004.

                 

                FORMULA 1 - PLATT'S TRADING MONTH POSTING PLUS
(MIDLAND)

                 

                PRICE: KOCH PETROLEUM GROUP L.P. MONTHLY EDQ
POSTED PRICE FOR WEST TEXAS/NEW MEXICO INTERMEDIATE DEEMED 40.0 DEGREES FOR THE
MONTH OF DELIVERY, PLUS THE AVERAGE OF THE *PLATTS DAILY ASSESSMENTS OF WTI-P
PLUS LESS THE DIFFERENCE BETWEEN (PLATTS WTI-CUSHING LESS PLATTS WTI-MIDLAND)
PLUS THE DELTA DOLLARS PER BARREL SET OUT ON EXHIBIT "A".

                 

                * NOTE
ALL PLATTS PRICING IS FOR THE DELIVERY MONTH AS PUBLISHED BY PLATTS DURING THE
PERIOD BEGINNING ON THE 26� OF THE SECOND MONTH PROCEEDING THE DELIVERY MONTH
AND ENDING ON THE 25� OF THE MONTH PRECEEDING THE DELIVERY MONTH (CARRIED TO 4
DECIMAL PLACES).

                
                  
                     

                  

                  
                     

                    
                      

                    

                  

                  
                     

                  

                

                 

                FORMULA
2 - PLATT'S TRADING MONTH WT (MIDLAND)

                 

                THE
AVERAGE OF THE MIDPOINTS OF THE ASSESSMENTS FOR PLATT'S TRADING MONTH WTI AT
MIDLAND, THE PLATT'S TRADING MIDLAND WTI VALUE SHALL BE THE MEAN DAILY AVERAGE,
AS PUBLISHED BY PLATTS DURING THE PERIOD BEGINNING ON THE 26� OF THE SECOND
MONTH PROCEEDING THE DELIVERY MONTH AND ENDING ON THE 25� OF THE MONTH
PRECEEDING THE DELIVERY MONTH (CARRIED TO 4 DECIMAL PLACES), PLUS THE DELTA
DOLLARS PER BARREL SET OUT ON EXHIBIT "A".

                 

                FORMULA
3 - NYMEX TRADING MONTH DOMESTIC LIGHT SWEET (MIDLAND)

                 

                THE
AVERAGE OF THE DAILY NYMEX SETTLEMENT PRICE FOR THE NEAR MONTH LIGHT SWEET CRUDE
OIL CONTRACT FOR THE PERIOD THAT THE DELIVERY MONTH TRADES AS THE PROMPT MONTH
(I.E. NYMEX TRADING MONTH), LESS THE DIFFERENCE BETWEEN (PLATTS WTI-CUSHING LESS
PLATTS WTI-MIDLAND) PLUS THE DELTA DOLLARS PER BARREL SET OUT ON EXHIBIT
"A".

                 

                * NOTE
ALL PLATTS PRICING IS FOR THE DELIVERY MONTH AS PUBLISHED BY PLATTS DURING THE
PERIOD BEGINNING ON THE 26TH OF THE SECOND MONTH PROCEEDING THE DELIVERY MONTH
AND ENDING ON THE 25TH OF THE MONTH PRECEEDING THE DELIVERY MONTH (CARRIED TO 4
DECIMAL PLACES).

                 

                
                  	
                        	
                          6.  

                        	
                          PAYMENT: PAYMENT UNDER
      THIS CONTRACT SHALL BE MADE BY WIRE TRANSFER ON THE TWENTIETH (20TH)
      CALENDAR DAY OF THE MONTH FOLLOWING THE MONTH OF DELIVERY LESS APPLICABLE
      TAXES. IF THE PAYMENT DUE DATE FALLS ON A SATURDAY OR BANK HOLIDAY (EXCEPT
      MONDAY), PAYMENT WILL BE MADE ON THE PRECEDING BUSINESS DAY. IF PAYMENT
      DUE DATE FALLS ON A SUNDAY OR MONDAY HOLIDAY, PAYMENT WILL BE MADE ON THE
      FOLLOWING BUSINESS DAY. PAYMENT SHOULD BE MADE TO BANK OF AMERICA, FOR THE
      ACCOUNT OF PIONEER NATURAL RESOURCES USA, INC., ACCOUNT NO. XXXXXXXXXX,
      ABA NO. XXXXXXXXX.

                        

                

                 

                
                  	
                        	
                          7.  

                        	
                          COMMENTS AND SPECIAL
      PROVISIONS: CONOCO'S GENERAL TERMS AND CONDITIONS TO
      APPLY.

                        

                

                 

                
                  	
                          APPROVED
      BY:

                        	
                          /s/
      John t.
      mcwhorter

                        	 
      
	 
      	
                          John
      t. mcwhorter

                        	 
      
	 
      	
                          occidental
      energy marketing, inc.

                        	 
      
	 
      	 
      	 
      
	
                          APPROVED
      BY:

                        	
                          /s/ Hershal K.
      Wolfe

                        	 
      
	 
      	
                          pioneer
      natural resources usa, inc.

                        	 
      
	 
      	
                          Hershal
      K. Wolfe

                        	 
      
	 
      	
                          Director
      of Marketing

                        	 
      

                

                

                  
                    
                       

                    

                    
                       

                      
                        

                      

                    

                    
                       

                    

                  

                

                 

                EXHIBIT
"A"

                OEMI'S
Contract #0403-PNR-13603-P

                Contract
#

                Allegro
Contract #114658

                

                 

                
                  	
                          Crude
      Type

                        	 
      	
                          Transporter

                        	 
      	
                          Start
      Date

                        	 
      	
                          Carrrier
      Lease ID #

                        	 
      	
                          EMOC
      RC

                        	 
      	
                          RPC

                        	 
      	
                          DO

                        	 
      	
                          Decimal

                        	 
      	
                          Old
      XOM Contract*

                        	 
      	
                          Operalor

                        	 
      	
                          Lease
      Name

                        	 
      	
                          OXY
      ALLEGO LEASE NAME

                        	 
      	
                          OXY
      Lease*

                        	 
      	
                          County

                        	 
      	
                          State

                        	 
      	
                          B/D

                        	 
      	
                          Lease
      Delta

                        
	
                          WTI

                        	 
      	
                          Genesis
      Trks

                        	 
      	
                          03/01/2004

                        	 
      	
                          53898

                        	 
      	
                          56377

                        	 
      	
                          56377

                        	 
      	
                          75451

                        	 
      	
                          1
      00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES USA, INC.

                        	 
      	
                          PRESTON
      SPRABERRYTR 1

                        	 
      	
                          PRESTON
      SPRABERRYTR 1

                        	 
      	
                          742055350001
      PITS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          1

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Genesis
      Trks

                        	 
      	
                          03/01/2004

                        	 
      	
                          53399

                        	 
      	
                          55583

                        	 
      	
                          76617

                        	 
      	
                          75046

                        	 
      	
                          1,00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES USA. INC.

                        	 
      	
                          PRESTON
      SPRABERRY DEAN TR 19 A

                        	 
      	
                          PRESTON
      SPRBY DEAN TR 19 A

                        	 
      	
                          74205535019APITS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          38

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Genesis
      Trks

                        	 
      	
                          03/01/2004

                        	 
      	
                          52546

                        	 
      	
                          55583

                        	 
      	
                          68287

                        	 
      	
                          75068

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES USA. INC.

                        	 
      	
                          PRESTON
      SPRABERRY DEAN TR 41

                        	 
      	
                          PRESTON
      SPRBY DEAN TR 41

                        	 
      	
                          74205535004tPITS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          3

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          291036

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 20B

                        	 
      	
                          PRESTON
      SPRABERRY UT

                        	 
      	
                          74205535020BPIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          7

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          841253

                        	 
      	
                          56377

                        	 
      	
                          65563

                        	 
      	
                          75450

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES USA. INC.

                        	 
      	
                          PRESTON
      SPRABERRY UNIT PSUCB

                        	 
      	
                          PRESTON
      SPRABERRY UT PSU-C.B.

                        	 
      	
                          7420553500CBPIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          57

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200006

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 15

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 15

                        	 
      	
                          742055350015PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          34

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200007

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 16

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 16

                        	 
      	
                          742055350016PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          27

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          251054

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 28

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 28

                        	 
      	
                          742055350028PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          22

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200031

                        	 
      	
                          56377

                        	 
      	
                          60638

                        	 
      	
                          75453

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 32A

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 32A

                        	 
      	
                          74205535032APIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          23

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200031

                        	 
      	
                          56377

                        	 
      	
                          60638

                        	 
      	
                          75453

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 3

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 32A

                        	 
      	
                          74205535032APIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          6

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200003

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 11

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 11

                        	 
      	
                          742055350011
      PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          33

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200004

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 12A

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 12A

                        	 
      	
                          74205535012APIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          12

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200005

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 14

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 14

                        	 
      	
                          742055350014PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          32

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200008

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 17

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 17

                        	 
      	
                          742055350017PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          77

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200009

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 18

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 18

                        	 
      	
                          742055350018PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          50

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          251057

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 20

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 20

                        	 
      	
                          742055350020PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          25

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200011

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 21

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 21

                        	 
      	
                          742055350021PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          100

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200013

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 21B

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 21B

                        	 
      	
                          74205535021BPIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          34

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200012

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 22

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 22

                        	 
      	
                          742055350022PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          14

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200014

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 23B

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 23B

                        	 
      	
                          74205535023BPIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          21

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200015

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 24

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 24

                        	 
      	
                          742055350024PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          19

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200016

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 25

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 25

                        	 
      	
                          742055350025PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          47

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200017

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 26

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 26

                        	 
      	
                          742055350026PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          64

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200018

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 27

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 27

                        	 
      	
                          742055350027PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          15

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          251062

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 29

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 29

                        	 
      	
                          742055350029PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          48

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          251066

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 30

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 30

                        	 
      	
                          742055350030PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          33

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          251055

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 31

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 31

                        	 
      	
                          742055350031PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          38

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          845316

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 31B

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 31B

                        	 
      	
                          74205535031BPIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          39

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200019

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 33

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 33

                        	 
      	
                          742055350033PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          9t

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200020

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 33B

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 33B

                        	 
      	
                          74205535033BPIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          28

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200021

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 34

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 34

                        	 
      	
                          742055350034PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          40

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200022

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 34A

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 34A

                        	 
      	
                          74205535034APIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          79

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200023

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 34B

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 34B

                        	 
      	
                          74205535034BPIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          11

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          845753

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 37-10

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 37A

                        	 
      	
                          74205535037APIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          8

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          251045

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 38

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 38

                        	 
      	
                          742055350038PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          31

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          251046

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 39

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 39

                        	 
      	
                          742055350039PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          83

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          251053

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 40

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 40

                        	 
      	
                          742055350040PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          56

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          845755

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 40B

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 40B

                        	 
      	
                          74205535040BPIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          7

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          251056

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 41

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 41

                        	 
      	
                          742055350041PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          248

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          251043

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 42

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 42

                        	 
      	
                          7420553500034PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          34

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200024

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 43A

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 43A

                        	 
      	
                          74205535043APIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          64

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200026

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 44

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 44

                        	 
      	
                          742055350044PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          24

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200027

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 44 B

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 44 B

                        	 
      	
                          74205535044BPIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          7

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200028

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 45

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 45A

                        	 
      	
                          74205535045APIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          42

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200029

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 45B

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 45B

                        	 
      	
                          74205535045BPIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          13

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200030

                        	 
      	
                          56377

                        	 
      	
                          60838

                        	 
      	
                          75454

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA, INC.

                        	 
      	
                          PRESTON
      DEAN SPRABERRY UNIT TR 4 (46A)

                        	 
      	
                          PRESTON
      SPRABERRY UT TR 46A

                        	 
      	
                          74205535046APIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          9

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200002

                        	 
      	
                          56377

                        	 
      	
                          60837

                        	 
      	
                          75452

                        	 
      	
                          1.00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES. USA. INC.

                        	 
      	
                          PRESTON
      SPRABERRY UNIT TR 7

                        	 
      	
                          PRESTON
      SPRABERRY UT-7

                        	 
      	
                          742055350007PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          4

                        	 
      	
                          -0.60

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          298808

                        	 
      	
                          55583

                        	 
      	
                          55583

                        	 
      	
                          75045

                        	 
      	
                          1
      00000000

                        	 
      	
                          B015

                        	 
      	
                          PIONEER
      NATURAL RES USA. INC.

                        	 
      	
                          PRESTON
      DEAN SPBY UNIT TR 37B

                        	 
      	
                          TXL
      -M- PRESTON SPBY UT 298808

                        	 
      	
                          74205535037BPIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          18

                        	 
      	
                          -0.60

                        
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 1816	 	 

                

                 

              

              
                
                   

                

                
                   

                  
                    

                  

                

                
                   

                

              

               

              
                
                  	
                        	
                          Occidental
      Energy Marketing, Inc.

                        	 	
                          5
      Greenway Plaza, Suite 110, Houston, Texas 77046-0521

                        
	 	
                          A
      subsidiary of Occidental Petroleum Corporation

                        	 	
                          P.
      O. Box 27570, Houston, Texas 77227-7570

                        
	 
      	 
      	 
      	
                          Phone
      713.215.7000

                        

                

                

                
                

                
                  CRUDE OIL CONTRACT AMENDMENT No.
3

                   

                

                
                  VIA
FAX:

                   

                

                
                  	
                          TO: 

                        	
                          Pioneer
      Natural Resources USA, Inc.

                        

                

                Attn: Contract Management
Services

                Fax: (972)969-3574

                Trader: Deb Stewart

                

                
                  	
                          FROM: 

                        	
                          Occidental
      Energy Marketing, Inc.

                        

                

                Trader: Marc Abbott

                

                
                  	
                          RE: 

                        	
                          
                            Occidental
      Contract # 0403-PNR-13606-P

                          

                        	
                          Amendment
      #3

                        

                

                 

                This
Amendment Number 3 to the Crude Oil Contract between Occidental Energy
Marketing, Inc. ("OEMI") and Pioneer Natural Resources USA, Inc.
("Counterparty") dated March, 2004 (the "Contract") is entered into as of
December 16, 2009.

                 

                For
good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged and agreed, the Parties agree that the Contract is hereby amended
effective December 1, 2009 as set forth below.

                

                Delete
the Arthur Judkins A lease from the contract and Exhibit "A" due to this lease
being commingled into the Judkins H 1, 2 lease.

                 

                 

                All
other terms of the agreement are unchanged.

                 

                 

                Agreed
to and approved by: 

                OEMI

                 

                 

                /s/ Marc
Abbott

                Marc Abbott

                Manager, Crude Oil Acquisitions

                 

                
                

                Agreed
to and approved by: 

                Pioneer
Natural Resources USA, Inc.

                 

                

                /s/ Hershal K. Wolfe

                Hershal
K. Wolfe

                Vice
President Marketing

                

                 

                12/16/2009

                
                  
                     

                  

                  
                     

                    
                      

                    

                  

                  
                     

                  

                

                 

                Allegro
Contract*     19307

                

                  
                    	
                            Crude
      Type

                          	
                            Transporter

                          	
                            Start
      Date

                          	
                            Carrier
      Lease ID*

                          	
                            EMOC
      RC

                          	
                            RPC

                          	
                            do

                          	
                            Decimal

                          	
                            Old
      XOM Contract #

                          	
                            Operator

                          	
                            Lease
      Name

                          	
                            OXY
      ALLEOO LEASE NAME

                          	
                            OXY Lease
      #

                          	
                            County

                          	
                            State

                          	
                            BVD

                          	
                            Location

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            53261

                          	
                            58525

                          	
                            58525

                          	
                            76928

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            CARLETON
      B

                          	
                            CARLETON
      B

                          	
                            742054790000PITS

                          	
                            Upton

                          	
                            TX

                          	
                            4

                          	
                            0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            57041

                          	
                            56151

                          	
                            58151

                          	
                            75194

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            CARUSS
      JUDKINS

                          	
                            CARLISS
      JUDKINS

                          	
                            742054800000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            16

                          	
                            0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            57050

                          	
                            56129

                          	
                            56129

                          	
                            75184

                          	
                            1.00000000

                          	
                            B008D

                          	
                            POINEER
      NATURAL RES. USA, INC.

                          	
                            E E
      EILAND B

                          	
                            E E
      EILAND B

                          	
                            742054950000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            4

                          	
                            0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            50703

                          	
                            55564

                          	
                            68208

                          	
                            75088

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            GERMANIA
      DEAN TR 1

                          	
                            GERMANIA
      TRACT 1

                          	
                            742054990001PITS

                          	
                            Midland

                          	
                            TX

                          	
                            132

                          	
                            0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            58537

                          	
                            55584

                          	
                            68208

                          	
                            75088

                          	
                            0.44733000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            GERMANIA
      UNIT TR 113

                          	
                            GERMANIA
      UT
      TR 113

                          	
                            742055000000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            95

                          	
                            0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            57045

                          	
                            63359

                          	
                            67195

                          	
                            78066

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            GERMANIA-SPRABERRY
      UT TR
      1

                          	
                            GERMANIA
      UT TR
      113

                          	
                            742055000000RTS

                          	
                            Midland

                          	
                            TX

                          	
                            35

                          	
                            0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            57045

                          	
                            63359

                          	
                            87222

                          	
                            78067

                          	
                            0.13455600

                          	
                            B008D

                          	
                            PIONEER
      NATURAL. RES. USA, INC.

                          	
                            GERMANIA-SPRABERRY
      UT TR
      2

                          	
                            GERMANIA
      UT TR
      113

                          	
                            742055000000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            10

                          	
                            0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            57045

                          	
                            63359

                          	
                            67223

                          	
                            78068

                          	
                            0.23009200

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            GERMANIA-SPRABERRY
      UT TR
      3

                          	
                            GERMANIA
      UT TR
      113

                          	
                            742055000000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            18

                          	
                            0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            57045

                          	
                            63359

                          	
                            67225

                          	
                            78069

                          	
                            0.12876100

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            GERMANIA-SPRABERRY
      UT TR
      4

                          	
                            GERMANIA
      UT TR
      113

                          	
                            742055000000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            10

                          	
                            0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            57045

                          	
                            63359

                          	
                            87227

                          	
                            78070

                          	
                            0.03764500

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            GERMANIA-SPRABERRY
      UT TR
      5

                          	
                            GERMANIA
      UT TR
      113

                          	
                            742055000000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            3

                          	
                            0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            57045

                          	
                            63359

                          	
                            67228

                          	
                            78071

                          	
                            0.02161600

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            GERMANIA-SPRABERRY
      UT TR 6

                          	
                            GERMANIA
      UT TR
      113

                          	
                            742055000000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            1

                          	
                            0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            50499

                          	
                            56033

                          	
                            56033

                          	
                            75148

                          	
                            1
      00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            JUDKINS
      H 1,2

                          	
                            JUDWNS
      H 1,2

                          	
                            742055130000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            11

                          	
                            0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            53259

                          	
                            59466

                          	
                            61707

                          	
                            76895E

                          	
                            1,00000000

                          	
                            B008D

                          	
                            RONEER
      NATURAL RES. USA. INC.

                          	
                            MOBIL
      NEAL 34

                          	
                            MOBIL
      NEAL 34

                          	
                            742055210000PITS

                          	
                            Upton

                          	
                            TX

                          	
                            4

                          	
                            0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	 
      	
                            52571

                          	
                            52571

                          	
                            73911

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            NAIL
      T

                          	
                            NAILT

                          	
                            742055250000PITS

                          	
                            Martin

                          	
                            TX

                          	
                            4

                          	
                            0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            53260

                          	
                            59466

                          	
                            61709

                          	
                            768B5F

                          	
                            1
      00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            NEAL
      34

                          	
                            NEAL
      34

                          	
                            742055260000PITS

                          	
                            Upton

                          	
                            TX

                          	
                            1

                          	
                            0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            57044

                          	
                            56378

                          	
                            56378

                          	
                            75455

                          	
                            1
      00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            O�DANIEL
      COMMINGLED

                          	
                            ODAN1EL
      COMMINGLED

                          	
                            742055330000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            96

                          	
                            0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            57670

                          	
                            56102

                          	
                            56102

                          	
                            75178

                          	
                            1
      00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SNOW
      DEN A 1-5

                          	
                            SNOW
      DEN A 1-5

                          	
                            742055450000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            42

                          	
                            0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            57051

                          	
                            76253

                          	
                            76253

                          	
                            52840

                          	
                            1
      00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            WALTON
      JUDKINS B

                          	
                            WALTON
      JUDWNS B

                          	
                            742055550000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            3

                          	
                            0.60

                          
	
                            WTI

                          	
                            TEPPCO
      PI

                          	
                            03/01/2004

                          	 
      	
                            56063

                          	
                            56063

                          	
                            75161

                          	
                            100000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            DL
      HUTT SEC 26

                          	
                            DL
      HUTT SEC 26

                          	
                            742054860000PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            17

                          	
                            0.60

                          
	
                            WTI

                          	
                            TEPPC
      Pl

                          	
                            03/01/2004

                          	 
      	
                            61387

                          	
                            61387

                          	
                            75182

                          	
                            1.00000000

                          	
                            B008D

                          	
                            RONEER
      NATURAL RES. USA, INC

                          	
                            DL
      HUTT SEC 28

                          	
                            DL
      HUTT SEC 28

                          	
                            742054870000PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            7

                          	
                            0
      60

                          
	
                            WTI

                          	
                            TEPPCO
      PI

                          	
                            03/01/2004

                          	 
      	
                            56147

                          	
                            56147

                          	
                            75192

                          	
                            1.06000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC

                          	
                            JADEE

                          	
                            JADEE

                          	
                            742055100000PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            5

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            295904

                          	
                            56148

                          	
                            56148

                          	
                            75193

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA. INC.

                          	
                            ARTHUR
      JUDKINS

                          	
                            ARTHUR
      JUDWNS

                          	
                            742054720000PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            17

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            294202

                          	
                            26329

                          	
                            26329

                          	
                            75189

                          	
                            1.00000000

                          	
                            B008D

                          	
                            RONEER
      NATURAL RES. USA. INC.

                          	
                            BESSIE
      FREEMAN

                          	
                            BESSIE
      FREEMAN

                          	
                            742054730000PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            8

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            251029

                          	
                            29496

                          	
                            29496

                          	
                            75042

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            FREEMAN
      A

                          	
                            FREEMAN
      A

                          	
                            742054980000PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            19

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845114

                          	
                            56379

                          	
                            60637

                          	
                            75456

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            MIDWFF
      DEAN UNIT TR 17

                          	
                            MIDKIFF
      DEAN UT TR17

                          	
                            742055190017PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            18

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            645102

                          	
                            56379

                          	
                            60631

                          	
                            75467

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            MIDWFF
      DEAN UNIT TR 23

                          	
                            MIDKIFF
      DEAN UT TR
      23

                          	
                            742055190023PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            19

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845131

                          	
                            56379

                          	
                            60636

                          	
                            75460

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            MIDWFF
      DEAN UNIT TR 24

                          	
                            MIDKIFF
      DEAN UT TR
      24

                          	
                            742055190024PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            19

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845101

                          	
                            56379

                          	
                            50630

                          	
                            75468

                          	
                            1.00000000

                          	
                            B008D

                          	
                            RONEER
      NATURAL RES. USA. INC.

                          	
                            MIDWFF
      DEAN UNIT TR 25

                          	
                            MIDKIFF
      DEAN UT TR
      25

                          	
                            742055190025PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            19

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      Pt

                          	
                            03/01/2004

                          	
                            845112

                          	
                            56379

                          	
                            60634

                          	
                            75461

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            MIDWFF
      DEAN UNIT TR 32

                          	
                            MIDKIFF
      DEAN UT TR 32

                          	
                            742055190032PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            31

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845126

                          	
                            56379

                          	
                            60633

                          	
                            75462

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            MIDKIFF
      DEAN UNIT TR 33

                          	
                            MIDKIFF
      DEAN UT TR33

                          	
                            742055190033PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            7

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845127

                          	
                            56379

                          	
                            60632

                          	
                            75463

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            MIDWFF
      DEAN UNIT TR 34

                          	
                            MIDKIFF
      DEAN UT TR
      34

                          	
                            742055190034PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            16

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845118

                          	
                            56379

                          	
                            60635

                          	
                            75457

                          	
                            1.00000000

                          	
                            B008D

                          	
                            RONEER
      NATURAL RES. USA. INC.

                          	
                            MIDKIFF
      DEAN UNIT TR 16

                          	
                            MIDKIFF
      DEAN UT TR
      18

                          	
                            742055190018PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            20

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            297203

                          	
                            63385

                          	
                            67972

                          	
                            78065

                          	
                            0.73567300

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            MIDKIFF
      UNIT

                          	
                            MIDKIFF
      UT

                          	
                            742055190000PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            492

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            298512

                          	
                            56040

                          	
                            56040

                          	
                            75207

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SAM
      R PRESTON SECTION 31

                          	
                            PRESTON
      SPRABERRY UT TR 396

                          	
                            742055410398PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            20

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      R

                          	
                            03/01/2004

                          	
                            298115

                          	
                            56205

                          	
                            56205

                          	
                            75203

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SAM
      R PRESTON SECTION 41

                          	
                            PRESTON
      SPRABERRY UT TR
      42 6

                          	
                            74205539042BPIPS

                          	
                            Midland

                          	
                            TX

                          	
                            44

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            200025

                          	
                            56210

                          	
                            56210

                          	
                            75206

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SAM
      R PRESTON SECTION 42

                          	
                            PRESTON
      SPRABERRY UT TR
      436

                          	
                            742055350438PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            31

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            292011

                          	
                            56110

                          	
                            56110

                          	
                            75180

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            PRESTON
      SPRABERRY UNIT TR 41B DT BOWLES

                          	
                            PRESTON
      SPRBY UT TR41B
      DT BOWLES

                          	
                            742055390418PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            114

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            298114

                          	
                            56193

                          	
                            56193

                          	
                            75202

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SAM
      R PRESTON SECTION 32

                          	
                            PRESTON,
      SAM R. TR 38B

                          	
                            742055380388PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            37

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            298607

                          	
                            56045

                          	
                            56045

                          	
                            75206

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            LOUISE
      SHACKELFORD OIL

                          	
                            SHACKELFORD
      COMMINGLE

                          	
                            742055170000PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            39

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            295905

                          	
                            55586

                          	
                            55566

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 14B

                          	
                            SHACKELFORO
      SPRABERRY UT

                          	
                            742055420000PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            6

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            251076

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            RONEER
      NATURAL RES USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 1

                          	
                            SHACKELFORO
      SPRABERRY UT TR
      1

                          	
                            742055420001PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            356

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845005

                          	
                            55586

                          	
                            55586

                          	
                            79081

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 13

                          	
                            SHACKELFORO
      SPRABERRY UT TR
      13

                          	
                            742055420013PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            45

                          	
                            060

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            545104

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 14

                          	
                            SHACKELFORO
      SPRABERRY UT TR 14

                          	
                            742055420014PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            26

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            645153

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 15

                          	
                            SHACKELFORD
      SPRABERRY UT TR 15

                          	
                            742055420015PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            20

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845167

                          	
                            55586

                          	
                            55590

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 17C

                          	
                            SHACKELFORD
      SPRABERRY UT TR
      17C

                          	
                            74205542017CPIPS

                          	
                            Midland

                          	
                            TX

                          	
                            24

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            645110

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 18

                          	
                            SHACKELFORD
      SPRABERRY UT TR 18

                          	
                            742055420018PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            32

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845094

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 24E

                          	
                            SHACKELFORO
      SPRABERRY UT TR
      24E

                          	
                            74205542024EPIPS

                          	
                            Midland

                          	
                            TX

                          	
                            58

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845248

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            RONEER
      NATURAL RES, USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 24F

                          	
                            SHACKELFORO
      SPRABERRY UTTR24F

                          	
                            74205542024FPIPS

                          	
                            Midland

                          	
                            TX

                          	
                            48

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845152

                          	
                            55586

                          	
                            55566

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 28

                          	
                            SHACKELFORD
      SPRABERRY UT TR
      28

                          	
                            742055420028PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            17

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845271

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 29A

                          	
                            SHACKELFORD
      SPRABERRY UT TR
      29

                          	
                            742055420029PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            8

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            251073

                          	
                            55586

                          	
                            55596

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 3

                          	
                            SHACKELFORD
      SPRABERRY UT TR
      3

                          	
                            742055420003PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            93

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            645185

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 30A

                          	
                            SHACKELFORD
      SPRABERRY UT TR
      30

                          	
                            742056420030PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            11

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            645154

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            RONEER
      NATURAL RES USA, INC

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 32

                          	
                            SHACKELFORD
      SPRABERRY UT TR
      32

                          	
                            742055420032PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            31

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845008

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.,

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 33

                          	
                            SHACKELFORD
      SPRABERRY UT TR
      33

                          	
                            742055420033PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            28

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            645158

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 34

                          	
                            SHACKELFORO
      SPRABERRY UT TR
      34

                          	
                            742055420034PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            21

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            645100

                          	
                            55566

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.,

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 35

                          	
                            SHACKELFORO
      SPRABERRY UT TR
      35

                          	
                            742055420035PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            30

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845630

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 36

                          	
                            SHACKELFORO
      SPRABERRY UT TR
      38

                          	
                            742055420036PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            56

                          	
                            0
      60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            645107

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES, USA, INC

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 42

                          	
                            SHACKELFORD
      SPRABERRY UT TR 42

                          	
                            742055420O42PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            23

                          	
                            060

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            645012

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES, USA, INC

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 43

                          	
                            SHACKELFORD
      SPRABERRY UT TR
      43

                          	
                            742055420043PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            42

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845637

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 44

                          	
                            SHACKELFORD
      SPRABERRY UT TR
      44

                          	
                            742055420044PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            11

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            645636

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 44B

                          	
                            SHACKELFORD
      SPRABERRY UT TR
      448

                          	
                            74205542044BPIPS

                          	
                            Midland

                          	
                            TX

                          	
                            9

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845639

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC,

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 45

                          	
                            SHACKELFORD
      SPRABERRY UTTR45

                          	
                            742055420045PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            8

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845640

                          	
                            55588

                          	
                            55588

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            RONEER
      NATURAL RES USA, INC

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 46

                          	
                            SHACKELFORD
      SPRABERRY UT TR
      46

                          	
                            742055420046PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            14

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845655

                          	
                            55588

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.,

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 48A

                          	
                            SHACKELFORD
      SPRABERRY UT TR
      48A

                          	
                            74205542048APIPS

                          	
                            Midland

                          	
                            TX

                          	
                            36

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845215

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 50B

                          	
                            SHACKELFORD
      SPRABERRY UT TR
      50B

                          	
                            74205542050BPIPS

                          	
                            Midland

                          	
                            TX

                          	
                            49

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845140

                          	
                            55586

                          	
                            55566

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 54

                          	
                            SHACKELFORD
      SPRABERRY UT TR
      54

                          	
                            742055420054PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            11

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            645144

                          	
                            55588

                          	
                            55566

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 57

                          	
                            SHACKELFORO
      SPRABERRY UT TR
      57

                          	
                            742055420057PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            12

                          	
                            0
      60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845103

                          	
                            55586

                          	
                            55588

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 61

                          	
                            SHACKELFORD
      SPRABERRY UT TR
      61

                          	
                            742055420061PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            55

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            645017

                          	
                            55566

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 62

                          	
                            SHACKELFORD
      SPRABERRY UT TR
      62

                          	
                            742055420062PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            52

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            298651

                          	
                            55586

                          	
                            55615

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 62B

                          	
                            SHACKELFORO
      SPRABERRY LIT TR 626

                          	
                            74205542062BPIPS

                          	
                            Midland

                          	
                            TX

                          	
                            32

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            645227

                          	
                            55566

                          	
                            55566

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 63A

                          	
                            SHACKELFORO
      SPRABERRY UT TR 63A

                          	
                            74205542063APIPS

                          	
                            Midland

                          	
                            TX

                          	
                            10

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845105

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 64

                          	
                            SHACKELFORO
      SPRABERRY UT TR
      64

                          	
                            742055420064PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            16

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845106

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORO
      SPRABERRY UNIT TR 65

                          	
                            SHACKELFORD
      SPRABERRY UT TR 65

                          	
                            742055420065PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            23

                          	
                            0.60

                          
	
                            wti

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845222

                          	
                            55586

                          	
                            55566

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            RONEER
      NATURAL RES, USA, INC

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 68

                          	
                            SHACKELFORD
      SPRABERRY UT TR
      68

                          	
                            742055420068PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            29

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            645228

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 70A

                          	
                            SHACKELFORD
      SPRABERRY UT TR
      70A

                          	
                            74205542070APIPS

                          	
                            Midland

                          	
                            TX

                          	
                            37

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	
                            845281

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 71A

                          	
                            SHACKELFORD
      SPRABERRY UT TR
      71A

                          	
                            74205542071APIPS

                          	
                            Midland

                          	
                            TX

                          	
                            26

                          	
                            0.60

                          
	
                            WTI

                          	
                            Centurion
      PI

                          	
                            03/01/2004

                          	 
      	
                            55594

                          	
                            55594

                          	
                            75549

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC,

                          	
                            SNOW
      DEN A-6

                          	
                            SNOW
      DEN A-6

                          	
                            742058300000PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            1

                          	
                            0.60

                          
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                            2896

                          	 
    

                  

                  

                  
                    
                      
                         

                      

                      
                         

                        
                          

                        

                      

                      
                         

                      

                    

                  

                   

                

                
                  	 	
                           

                        	 	5
      Greenway Plaza, Suite 110, Houston, Texas 77046-0521
	 	
                          
                            Occidental
      Energy Marketing, Inc.

                          

                        	 	
                          P.
      O. Box 27570, Houston, Texas 77227-7570

                        
	 
      	A
      subsidiary of Occidental Petroleum Corporation	 
      	
                          Phone
      713.215.7000

                        

                

                

                

                VIA
FAX: 972-969-3574

                 

                TO:
DEB STEWART - PIONEER NATURAL RESOURCES USA, INC. - PHONE
972-969-3855

                FROM:
MARK HAFNER - OCCIDENTAL ENERGY MARKETING, INC. - PHONE
432-685-5884

                

                
                  	
                          REFERENCE:

                        	
                          OCCIDENTAL
      CONTRACT NUMBER: 0403-PNR-13606-P

                        

                

                PIONEER
NATURAL RESOURCES USA, INC. CONTRACT NUMBER:

                

                THIS
FAX CONFIRMS THE AGREEMENT BETWEEN DEB STEWART OF PIONEER NATURAL RESOURCES USA,
INC. AND MARK HAFNER OF OCCIDENTAL ENERGY MARKETING, INC. ON FEBRUARY 1, 2004.
THE FOLLOWING DETAILS ARE OCCIDENTAL'S UNDERSTANDING:

                

                
                  	
                          SELLER: 

                        	
                          PIONEER
      NATURAL RESOURCES USA, INC.
("PIONEER")

                        

                

                
                  	
                          BUYER: 

                        	
                          OCCIDENTAL
      ENERGY MARKETING, INC.
("OCCIDENTAL")

                        

                

                

                
                  	
                          1.

                        	
                          VOLUME:   APPROXIMATELY 2,912 BARRELS PER DAY EXACT
      VOLUME EQUAL TO THE PRODUCTION FROM THE LEASES ON ATTACHED EXHIBIT
      "A"

                        

                

                

                
                  	
                          2.

                        	
                          QUALITY/GRADE:   WEST TEXAS
  INTERMEDIATE

                        

                

                

                
                  	
                          3.

                        	
                          DELIVERY
      POINT:   TITLE
      AND RISK OF LOSS SHALL PASS FROM PIONEER TO OCCIDENTAL AS THE CRUDE OIL
      ENTERS THE FACILITIES OF TROJAN PIPELINE AND TEPPCO PIPELINE AND
      OCCIDENTAL'S DESIGNATED
TRUCKER.

                        

                

                

                
                  	
                          4.

                        	
                          TERM:   MARCH  1  - 31, 2004 AND
      CONTINUING MONTH TO MONTH THEREAFTER SUBJECT TO A 30 DAY ADVANCE WRITTEN
      NOTICE OF CANCELLATION BY EITHER
PARTY.

                        

                

                

                
                  	
                          5.

                        	
                          PRICE:   KOCH PETROLEUM GROUP L.P. MONTHLY EDQ POSTED
      PRICE FOR WEST TEXAS/NEW MEXICO INTERMEDIATE DEEMED 40.0 DEGREES FOR THE
      MONTH OF DELIVERY, PLUS THE AVERAGE OF THE *PLATTS DAILY ASSESSMENTS OF
      WTI-P PLUS LESS THE DIFFERENCE BETWEEN (PLATTS WTI-CUSHING LESS PLATTS
      WTI-MIDLAND) PLUS DELTA SET OUT ON EXHIBIT
  "A".

                        

                

                

                *NOTE ALL
PLATTS PRICING IS FOR THE DELIVERY MONTH AS PUBLISHED BY PLATTS DURING THE
PERIOD BEGINNING ON THE 26TH OF THE SECOND MONTH PRECEEDING THE DELIVERY MONTH
AND ENDING ON THE 25TH OF THE MONTH PRECEEDING THE DELIVERY
MONTH.

                

                
                  	
                          6.

                        	
                          PAYMENT:      PAYMENT UNDER THIS CONTRACT SHALL BE MADE BY
      WIRE TRANSFER ON THE TWENTIETH (20TH) CALENDAR DAY OF THE MONTH FOLLOWING
      THE MONTH OF DELIVERY LESS APPLICABLE TAXES. IF THE PAYMENT DUE DATE FALLS
      ON A SATURDAY OR BANK HOLIDAY (EXCEPT MONDAY), PAYMENT WILL BE MADE ON THE
      PRECEDING BUSINESS DAY. IF PAYMENT DUE DATE FALLS ON A SUNDAY OR MONDAY
      HOLIDAY, PAYMENT WILL BE MADE ON THE FOLLOWING BUSINESS DAY. PAYMENT
      SHOULD BE MADE TO BANK OF AMERICA, FOR THE ACCOUNT OF PIONEER NATURAL
      RESOURCES USA, INC., ACCOUNT NO. XXXXXXXXXX, ABA NO.
      XXXXXXXXX.

                        

                

                 

                
                  	
                          7.

                        	
                          COMMENTS
      AND SPECIAL PROVISIONS:   CONOCO'S GENERAL TERMS AND CONDITIONS TO
      APPLY.

                        

                

                 

                
                   

                  
                    	APPROVED BY:	 	/s/ John
      T. McWhorter	 
	 	 	JOHN T. MCWHORTER	 
	 	 	OCCIDENTAL ENERGY MARKETING, INC.	 
	 	 	 	 
	APPROVED BY:	 	
                            /s/ Hershal K. Wolfe

                          	 
	 	 	
                            PIONEER
      NATURAL RESOURCES USA, INC.

                          	
                            Hershal
      K. Wolfe 

                          
	 	 	 	Director of
      Marketing

                  

                   

                  
                    
                      
                      

                    

                    
                      
                      

                      
                        

                      

                    

                    
                      
                      

                    

                  

                

                 

                
                  EXHIBIT
"A"

                  OEMI'S
Contract #0403-PNR-13606-P

                  Contracts
#

                  Allegro
Contract #114660

                

                 

                
                  
                    	
                            Crude
      Type

                          	
                            Transporter

                          	
                            Start
      Date

                          	
                            Carrier
      Lease ID*

                          	
                            EMOC
      RC

                          	
                            RPC

                          	
                            DO

                          	
                            Decimal

                          	
                            Old
      XOM Contract #

                          	
                            Operator

                          	
                            Lease
      Name

                          	
                            OXY
      ALLEOO LEASE NAME

                          	
                            OXY
      Lease #

                          	
                            County

                          	
                            State

                          	
                            BVD

                          	
                            Lease
      Delta

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            57043

                          	
                            56154

                          	
                            56154

                          	
                            75195

                          	
                            1
      00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            ARTHUR
      JUDKINS A

                          	
                            ARTHUR
      JUDKINS A

                          	
                            74205472A000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            7

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            53261

                          	
                            58525

                          	
                            59525

                          	
                            76928

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            CARLETON
      B

                          	
                            CARLETON
      B

                          	
                            742054790000PITS

                          	
                            Upton

                          	
                            TX

                          	
                            4

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            57041

                          	
                            56151

                          	
                            58151

                          	
                            75194

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            CARLISS
      JUDKINS

                          	
                            CARLISS
      JUDKINS

                          	
                            742054800000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            16

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            57050

                          	
                            56129

                          	
                            56129

                          	
                            75184

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            E E
      EILAND B

                          	
                            E E
      EILAND B

                          	
                            742054950000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            4

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            50703

                          	
                            55584

                          	
                            68208

                          	
                            75088

                          	
                            1
      00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            GERMANIA
      DEAN TR 1

                          	
                            GERMANIA
      TRACT 1

                          	
                            742054990001PITS

                          	
                            Midland

                          	
                            TX

                          	
                            132

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            58537

                          	
                            55584

                          	
                            68208

                          	
                            75068

                          	
                            044733000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            GERMANIA
      UNIT TR 113

                          	
                            GERMANIA
      UT TR 113

                          	
                            742055000000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            95

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            57045

                          	
                            63359

                          	
                            67195

                          	
                            78066

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            GERMANIA-SPRABERRY
      UT TR 1

                          	
                            GERMANIA
      UT TR 113

                          	
                            742055000000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            35

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            57045

                          	
                            63359

                          	
                            57222

                          	
                            79067

                          	
                            0.13455600

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            GERMANIA-SPRABERRY
      UT TR 2

                          	
                            GERMANIA
      UT TR 113

                          	
                            742055000000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            10

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            57045

                          	
                            63359

                          	
                            67223

                          	
                            78068

                          	
                            0.23009200

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            GERMANIA-SPRABERRY
      UT TR 3

                          	
                            GERMANIA
      UT TR 113

                          	
                            742055000000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            18

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            57045

                          	
                            63359

                          	
                            87225

                          	
                            78069

                          	
                            0
      12876100

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            GERMANIA-SPRA8ERRY
      UT TR 4

                          	
                            GERMANIA
      UT TR 113

                          	
                            742055000000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            10

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            57045

                          	
                            63359

                          	
                            67227

                          	
                            78070

                          	
                            0
      03764500

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            GERMANIA-SPRABERRY
      UT TR 5

                          	
                            GERMANIA
      UT TR 113

                          	
                            742055000000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            3

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            57045

                          	
                            63359

                          	
                            67228

                          	
                            79071

                          	
                            002161600

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            GERMAN
      IA-SPRA8ERRY UT TR 6

                          	
                            GERMANIA
      UT TR 113

                          	
                            742055000000
      PITS

                          	
                            Midland

                          	
                            TX

                          	
                            1

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            57671

                          	
                            55636

                          	
                            55636

                          	
                            75729

                          	
                            1
      00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            JOHN
      SNOWDEN

                          	
                            JOHN
      SNOWDEN

                          	
                            742055110000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            9

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            50499

                          	
                            56033

                          	
                            56033

                          	
                            75148

                          	
                            1
      00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            JUDKINS
      H 1, 2

                          	
                            JUDKINS
      H 1,2

                          	
                            742055130000
      PITS

                          	
                            Midland

                          	
                            TX

                          	
                            11

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            53259

                          	
                            59466

                          	
                            61707

                          	
                            76895E

                          	
                            1
      00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            MOBIL
      NEAL 34

                          	
                            MOBIL
      NEAL 34

                          	
                            742055210000PITS

                          	
                            Upton

                          	
                            TX

                          	
                            4

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	 
      	
                            52571

                          	
                            52571

                          	
                            73911

                          	
                            1.00000000

                          	
                            E006D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            MAILT

                          	
                            NAIL t

                          	
                            742055250000PITS

                          	
                            Martin

                          	
                            TX

                          	
                            4

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            53260

                          	
                            59466

                          	
                            81709

                          	
                            76895F

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            NEAL
      34

                          	
                            NEAL
      34

                          	
                            742055260000PTTS

                          	
                            Upton

                          	
                            TX

                          	
                            1

                          	
                            -0
      60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            57044

                          	
                            56378

                          	
                            56378

                          	
                            75455

                          	
                            1
      00000000

                          	
                            B0080

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            0-DANIEL
      COMMINGLED

                          	
                            OOAMIEL
      COMMINGLED

                          	
                            742055330000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            96

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            57670

                          	
                            56102

                          	
                            56102

                          	
                            75178

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SNOW
      DEN A 1-5

                          	
                            SNOW
      DEN A 1-5

                          	
                            742055450000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            42

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Genesis
      Trks

                          	
                            03/01/2004

                          	
                            57051

                          	
                            76253

                          	
                            76253

                          	
                            52840

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            WALTON
      JUDKINS B

                          	
                            WALTON
      JUDKINS B

                          	
                            742055550000PITS

                          	
                            Midland

                          	
                            TX

                          	
                            3

                          	
                            -0.60

                          
	
                            WTI

                          	
                            TEPPCO
      PI

                          	
                            03/01/2004

                          	 
      	
                            56063

                          	
                            56063

                          	
                            75161

                          	
                            1
      00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            D L
      HUTT SEC 26

                          	
                            D L
      HUTT SEC 26

                          	
                            742054860000PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            17

                          	
                            -0
      60

                          
	
                            WTI

                          	
                            TEPPCO
      PI

                          	
                            03/01/2004

                          	 
      	
                            81387

                          	
                            81387

                          	
                            75182

                          	
                            1
      00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            D L
      HUTT SEC 28

                          	
                            D L
      HUTT SEC 28

                          	
                            742054670000PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            7

                          	
                            -0
      60

                          
	
                            WTI

                          	
                            TEPPCO
      PI

                          	
                            03/01/2004

                          	 
      	
                            56147

                          	
                            56147

                          	
                            75192

                          	
                            100000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            JADEE

                          	
                            JADEE

                          	
                            742055100000PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            5

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            295904

                          	
                            56146

                          	
                            56148

                          	
                            75193

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            ARTHUR
      JUDKINS

                          	
                            ARTHUR
      JUDKINS

                          	
                            742054720000PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            17

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            294202

                          	
                            26329

                          	
                            26329

                          	
                            75189

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            BESSIE
      FREEMAN

                          	
                            BESSIE
      FREEMAN

                          	
                            742054730000PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            8

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            251029

                          	
                            2S496

                          	
                            29496

                          	
                            75042

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            FREEMAN
      A

                          	
                            FREEMAN
      A

                          	
                            742054980000PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            19

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845114

                          	
                            56379

                          	
                            60637

                          	
                            75458

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            MIDKIFF
      DEAN UNIT TR 17

                          	
                            MIDKIFF
      DEAN UT TR 17

                          	
                            742055190017PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            18

                          	
                            -0
      60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            B45102

                          	
                            56379

                          	
                            60631

                          	
                            75467

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            MIDKJFF
      DEAN UNIT TR 23

                          	
                            MIDKIFF
      DEAN UT TR 23

                          	
                            742055190023PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            19

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845131

                          	
                            56379

                          	
                            60636

                          	
                            75460

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            MIDKIFF
      DEAN UNIT TR 24

                          	
                            MIDKIFF
      DEAN UT TR 24

                          	
                            742055190024PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            19

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845101

                          	
                            56379

                          	
                            60630

                          	
                            75466

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            MIDKIFF
      DEAN UNIT TR 25

                          	
                            MIDKIFF
      DEAN UT TR 25

                          	
                            742055190025PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            19

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845112

                          	
                            56379

                          	
                            60634

                          	
                            75461

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            MIDKIFF
      DEAN UNIT TR 32

                          	
                            MIDKIFF
      DEAN UT TR 32

                          	
                            742055190032PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            31

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845126

                          	
                            56379

                          	
                            60633

                          	
                            75462

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            MIDKIFF
      DEAN UNIT TR 33

                          	
                            MIDKIFF
      DEAN UT TR 33

                          	
                            742055190033PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            7

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845127

                          	
                            56379

                          	
                            60632

                          	
                            75463

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            MIDKIFF
      DEAN UNIT TR 34

                          	
                            MIDKIFF
      DEAN UT TR 34

                          	
                            742055190034PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            16

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845118

                          	
                            56379

                          	
                            60635

                          	
                            75457

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            MIDKIFF
      DEAN UNIT TR 18

                          	
                            MIDKIFF
      DEAN UT TR 18

                          	
                            742055190018P1PS

                          	
                            Midland

                          	
                            TX

                          	
                            20

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            297203

                          	
                            63385

                          	
                            67972

                          	
                            78065

                          	
                            0.73567300

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            MIDKIFF
      UNIT

                          	
                            MIDKIFF
      UT

                          	
                            742055190000PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            492

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            298512

                          	
                            56040

                          	
                            56040

                          	
                            75207

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA. IMC.

                          	
                            SAM
      r
      PRESTON SECTION 31

                          	
                            PRESTON
      SPRABERRY UT TR 386

                          	
                            74205541039BPIPS

                          	
                            Midland

                          	
                            TX

                          	
                            20

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      R

                          	
                            03/01/2004

                          	
                            298115

                          	
                            56205

                          	
                            56205

                          	
                            75203

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SAM
      r
      PRESTON SECTION 41

                          	
                            PRESTON
      SPRABERRY UT TR 42 B

                          	
                            74205539042BPIPS

                          	
                            Midland

                          	
                            TX

                          	
                            44

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            200025

                          	
                            56210

                          	
                            56210

                          	
                            75206

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SAM
      r
      PRESTON SECTION 42

                          	
                            PRESTON
      SPRABERRY UT TR 43B

                          	
                            74205535043BPIPS

                          	
                            Midland

                          	
                            TX

                          	
                            31

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      R

                          	
                            03/01/2004

                          	
                            292011

                          	
                            56110

                          	
                            56110

                          	
                            75180

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            PRESTON
      SPRABERRY UNIT TR41B DT BOWLES

                          	
                            PRESTON
      SPRBY UT TR41B.DT BOWLES

                          	
                            74205539041BPIPS

                          	
                            Midland

                          	
                            TX

                          	
                            114

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      R

                          	
                            03/01/2004

                          	
                            298114

                          	
                            56193

                          	
                            56193

                          	
                            75202

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SAM
      r
      PRESTON SECTION 32

                          	
                            PRESTON,
      SAM R. TR 388

                          	
                            74205538038BPIPS

                          	
                            Midland

                          	
                            TX

                          	
                            37

                          	
                            -0
      60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            298607

                          	
                            56045

                          	
                            56045

                          	
                            75208

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            LOUISE
      SHACKELFORD OIL

                          	
                            SHACKELFORD
      COMMINGLE

                          	
                            742055170000PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            39

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            295905

                          	
                            55566

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.,

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 14B

                          	
                            SHACKELFORD
      SPRABERRY UT

                          	
                            742055420000PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            6

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            251076

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            RONEER
      NATURAL RES. USA. INC

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 1

                          	
                            SHACKELFORD
      SPRABERRY UT TR 1

                          	
                            742055420001PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            356

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845005

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 13

                          	
                            SHACKELFORD
      SPRABERRY UT TR 13

                          	
                            742055420013PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            45

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845104

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 14

                          	
                            SHACKELFORD
      SPRABERRY UT TR 14

                          	
                            742055420014PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            26

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      R

                          	
                            03/01/2004

                          	
                            845153

                          	
                            55586

                          	
                            55596

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 15

                          	
                            SHACKELFORD
      SPRABERRY UT TR 15

                          	
                            742055420015PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            20

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      R

                          	
                            03/01/2004

                          	
                            845167

                          	
                            55586

                          	
                            55590

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 17C

                          	
                            SHACKELFORD
      SPRABERRY UT TR 17C

                          	
                            74205542017CPIPS

                          	
                            Midland

                          	
                            TX

                          	
                            24

                          	
                            -0
      60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845110

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 18

                          	
                            SHACKELFORD
      SPRABERRY UT TR 18

                          	
                            742055420018PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            32

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845094

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 24E

                          	
                            SHACKELFORD
      SPRABERRY UT TR 24E

                          	
                            74205542024EPIPS

                          	
                            Midland

                          	
                            TX

                          	
                            58

                          	
                            -0
      60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845248

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 24F

                          	
                            SHACKELFORD
      SPRABERRY UT TR 24F

                          	
                            74205542024FPIPS

                          	
                            Midland

                          	
                            TX

                          	
                            48

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            B45152

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 28

                          	
                            SHACKELFORD
      SPRABERRY UT TR 28

                          	
                            742055420028PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            17

                          	
                            -0
      60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845271

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 29A

                          	
                            SHACKELFORD
      SPRABERRY UT TR 29

                          	
                            742055420029PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            8

                          	
                            -0
      60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            251073

                          	
                            55586

                          	
                            55596

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 3

                          	
                            SHACKELFORD
      SPRABERRY UT TR 3

                          	
                            742055420003PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            93

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            645185

                          	
                            55596

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 30A

                          	
                            SHACKELFORD
      SPRABERRY UT TR 30

                          	
                            742055420030PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            11

                          	
                            -0
      60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845154

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 32

                          	
                            SHACKELFORD
      SPRABERRY UT TR 32

                          	
                            742055420032PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            31

                          	
                            -0
      60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845008

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 33

                          	
                            SHACKELFORD
      SPRABERRY UT TR 33

                          	
                            742055420033PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            28

                          	
                            -0
      60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845158

                          	
                            55596

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 34

                          	
                            SHACKELFORD
      SPRABERRY UT TR 34

                          	
                            742055420034PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            21

                          	
                            -0
      60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845100

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008O

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 35

                          	
                            SHACKELFORD
      SPRABERRY UT TR 35

                          	
                            742055420035PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            30

                          	
                            -0
      60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845630

                          	
                            55596

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B006O

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 36

                          	
                            SHACKELFORD
      SPRABERRY UT TR 36

                          	
                            742055420036PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            58

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845107

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 42

                          	
                            SHACKELFORD
      SPRABERRY UT TR 42

                          	
                            742055420042PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            23

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845012

                          	
                            55586

                          	
                            55566

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 43

                          	
                            SHACKELFORD
      SPRABERRY UT TR 43

                          	
                            742055420043PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            42

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845637

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 44

                          	
                            SHACKELFORD
      SPRABERRY UT TR 44

                          	
                            742055420044
      PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            11

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845638

                          	
                            55586

                          	
                            55566

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR44B

                          	
                            SHACKELFORD
      SPRABERRY UT TR 44B

                          	
                            74205542044BPIPS

                          	
                            Midland

                          	
                            TX

                          	
                            9

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845639

                          	
                            55566

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 45

                          	
                            SHACKELFORD
      SPRABERRY UT TR 45

                          	
                            742055420045PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            8

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845640

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 46

                          	
                            SHACKELFORD
      SPRABERRY UT TR 46

                          	
                            742055420046PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            14

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845655

                          	
                            55596

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 48A

                          	
                            SHACKELFORD
      SPRABERRY UT TR 48A

                          	
                            74205542048APIPS

                          	
                            Midland

                          	
                            TX

                          	
                            36

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845215

                          	
                            55596

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 50B

                          	
                            SHACKELFORD
      SPRABERRY UT TR 50B

                          	
                            74205542050BPIPS

                          	
                            Midland

                          	
                            TX

                          	
                            49

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845140

                          	
                            55596

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 54

                          	
                            SHACKELFORD
      SPRABERRY UT TR 54

                          	
                            742055420054PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            11

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845144

                          	
                            55566

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 57

                          	
                            SHACKELFORD
      SPRABERRY UT TR 57

                          	
                            742055420057PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            12

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845103

                          	
                            55596

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 61

                          	
                            SHACKELFORD
      SPRABERRY UT TR 61

                          	
                            742055420061PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            55

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845017

                          	
                            55596

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 62

                          	
                            SHACKELFORD
      SPRABERRY UT TR 62

                          	
                            742055420062PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            52

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            298651

                          	
                            55586

                          	
                            55615

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 62B

                          	
                            SHACKELFORD
      SPRABERRY UT TR 62B

                          	
                            74205542062BPIPS

                          	
                            Midland

                          	
                            TX

                          	
                            32

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845227

                          	
                            55566

                          	
                            55596

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 63A

                          	
                            SHACKELFORD
      SPRABERRY UT TR 63A

                          	
                            74205542063APIPS

                          	
                            Midland

                          	
                            TX

                          	
                            10

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845105

                          	
                            55566

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            8008O

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 64

                          	
                            SHACKELFORD
      SPRABERRY UT TR 64

                          	
                            742055420064PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            16

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845106

                          	
                            55566

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 65

                          	
                            SHACKELFORD
      SPRABERRY UT TR 65

                          	
                            742055420065PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            23

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845222

                          	
                            55566

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 6S

                          	
                            SHACKELFORD
      SPRABERRY UT TR 6B

                          	
                            74205542006BPIPS

                          	
                            Midland

                          	
                            TX

                          	
                            29

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	
                            845228

                          	
                            55586

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 70A

                          	
                            SHACKELFORD
      SPRABERRY UTTR 70A

                          	
                            74205542070APIPS

                          	
                            Midland

                          	
                            TX

                          	
                            37

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trepan
      PI

                          	
                            03/01/2004

                          	
                            8452S1

                          	
                            55566

                          	
                            55586

                          	
                            75091

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SHACKELFORD
      SPRABERRY UNIT TR 71A

                          	
                            SHACKELFORD
      SPRABERRY UT TR 71A

                          	
                            74205542071APIPS

                          	
                            Midland

                          	
                            TX

                          	
                            26

                          	
                            -0.60

                          
	
                            WTI

                          	
                            Trojan
      PI

                          	
                            03/01/2004

                          	 
      	
                            55594

                          	
                            55594

                          	
                            75549

                          	
                            1.00000000

                          	
                            B008D

                          	
                            PIONEER
      NATURAL RES. USA, INC.

                          	
                            SNOWDENA-6

                          	
                            SNOW
      DEN A-6

                          	
                            742058300000PIPS

                          	
                            Midland

                          	
                            TX

                          	
                            1

                          	
                            -0.60

                          
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                            2912

                          	 
    

                  

                

                 

                 

                  
                    

                  

                

              

               

              
                
                  
                  

                

                
                  
                  

                  
                    

                  

                

                
                  
                  

                

              

               

              
                	
                         

                      	 
      	 
      
	 
      	
                        Occidental
      Energy Marketing, Inc.

                      	
                        5
      Greenway Plaza, Suite 110, Houston, Texas 77046-0521

                      
	 
      	
                        A
      subsidiary of Occidental Petroleum Corporation

                      	
                        P.
      O. Box 27570, Houston, Texas 77227-7570

                      
	 
      	 
      	
                        Phone
      713.215.7000

                      

              

              

              

              CRUDE
OIL CONTRACT AMENDMENT No. 5

              

              VIA
FAX:

              

              
                	
                        TO:

                      	
                        Pioneer
      Natural Resources USA, Inc.

                      

              

              
                	
                         
      

                      	
                        Attn:
      Contract Management Services

                      

              

              
                	
                         
      

                      	
                        Fax:
      (972)969-3574

                      

              

              
                	
                         
      

                      	
                        Trader:
      Deb Stewart

                      

              

              

              
                	
                        FROM:

                      	
                        Occidental
      Energy Marketing, Inc.

                      

              

              
                	
                         
      

                      	
                        Trader:
      Mark Hafner

                      

              

              

              
                	
                        RE:

                      	
                        Occidental
      Contract # 0403-PNR-13604-P

                      	
                        Amendment
      #5

                      

              

              

              This
Amendment Number 5 to the Crude Oil Contract between Occidental Energy
Marketing, Inc. ("OEMI") and Pioneer Natural Resources USA, Inc.
("Counterparty") dated March, 2004 (the "Contract") is entered into as of
September 18, 2008.

              

              For good
and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged and agreed, the Parties agree that the Contract is hereby amended
effective September 1, 2008 as set forth below.

              

              Add
the following leases to the contract and Exhibit "A":

              

              Lease
Name

              W.H.
Wilde

              

              

              All other
terms of the agreement are unchanged.

              

              

              Agreed to
and approved by:

              OEMI

               

               

              
                
                  	
                          /s/
      Mark Hafner

                        	 
      
	
                          Mark
      Hafner

                        
	
                          Director,
      Crude Oil Acquisitions

                        

                

              

               

              Agreed to
and approved by:

              Pioneer
Natural Resources USA, Inc.

              

              

              
                	
                        /s/
      Hershal K. Wolfe

                      	 
      
	
                        Hershal
      K. Wolfe

                      	 
      
	
                        Vice
      President Marketing

                      	 
      

              

              
                
                   

                

                
                   

                  
                    

                  

                

                
                   

                

              

              EXHIBIT
"A"

              

              OEMI's
CONTRACT: 0403-PNR-13604-P#5

              Counter
Party Name:    Pioneer Natural Resources

              Counter
Party Contract Number: OII-10444

              Allegro
Contract Number:    119314

              

              
                	
                        INTERFACE

                      	 	
                        PRODUCT

                      	 	
                        OPERATOR

                      	 	
                        LEASE
      NAME

                      	 	
                        LEASE
      EFFECTIVE DATE

                      	 	
                        CONTROLLED
      %

                      	 	
                        COUNTY

                      	 	
                        STATE

                      	 	
                        TRANSPORTER

                      	 	
                        DELTA

                      	 	
                        DELTA
      EFFECTIVE DATE

                      	 	
                        CONTRACT

                      	 	
                        PRICE
      INDEX

                      
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 
	
                        742054710000PITS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        ALLEEN
      OBRIEN 6, 43, BK BOONE

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Midland

                      	 	
                        TX

                      	 	
                        OET
      Trucks

                      	 	
                        $0.30

                      	 	
                        3/1/2006

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742054820000PIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        COX
      B

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Glasscock

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742054830000PIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        CUNNINGHAM
      16

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Midland

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742054840000PIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        CUNNINGHAM
      16-A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Midland

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742054850000PIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        CUNNINGHAM
      B

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Midland

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742065260000PITS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        Davison
      #2

                      	 	
                        2/1/2006

                      	 	
                        100.00000000

                      	 	
                        UPTON

                      	 	
                        TX

                      	 	
                        OET
      Trucks

                      	 	
                        $0.30

                      	 	
                        7/1/2006

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742055040000PITS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        H L
      MCCLINTE

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Midland

                      	 	
                        TX

                      	 	
                        OET
      Trucks

                      	 	
                        $0.30

                      	 	
                        3/1/2006

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205530001APITS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 1 A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        OET
      Trucks

                      	 	
                        $0.60

                      	 	
                        3/1/2006

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205530019APITS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 19 A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        OET
      Trucks

                      	 	
                        $0.60

                      	 	
                        3/1/2006

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205530020APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 20A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74206530021APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 21A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205530022APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 22A

                      	 	
                        5/1/2005

                      	 	
                        100
      00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205530002APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 2A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742055300039PITS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 39

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        OET
      Trucks

                      	 	
                        $0.60

                      	 	
                        3/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205530039APITS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 39 A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        OET
      Trucks

                      	 	
                        $0.60

                      	 	
                        3/1/2006

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205530003APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 3A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205530040APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 40A

                      	 	
                        5/1/2005

                      	 	
                        100
      00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205530042APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 42A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205530043APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 43A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        7420653045APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 45A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205530048APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 48A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742055300052PITS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 5-2

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        OET
      Trucks

                      	 	
                        $0.60

                      	 	
                        3/1/2006

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742055300054PITS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 5-4

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        OET
      Trucks

                      	 	
                        $0.60

                      	 	
                        3/1/2006

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742055300542PITS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 5-42

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        OET
      Trucks

                      	 	
                        $0.60

                      	 	
                        3/1/2006

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205530051APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 51A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205530052APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 52A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205630053APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 53A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205530068APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 68A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205530069APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 69A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205530006APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 6A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205530070APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 70A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205530071APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 71A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205530007APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 7A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205530085APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 85A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205530086APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 86A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2006

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205530088APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 88A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205530069APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 89A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205530090APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRABERRY UT TR 90A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742055240000PIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        N.
      PEMBROOK SPRBY UT TR 6/67/85

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742058290000PITS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        OBRIEN
      A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Midland

                      	 	
                        TX

                      	 	
                        OET
      Trucks

                      	 	
                        $0.30

                      	 	
                        3/1/2006

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742055430000PIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SHERROO
      44

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Upton

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742055460000PIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPBY
      ORIVER-PION PL

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547101
      APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      OR VER UT TR 101A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2006

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547102APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 102A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2006

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547105APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UTTR 105A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547011APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 11A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Glasscock

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547012APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 12A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547130APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 130A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547131APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 131A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        6/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742055470014PIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Nature! Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 14

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Glasscock

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2006

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547151APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 151A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547152APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 152A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547153APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 153A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547154APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 154A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        REAGAN

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        6/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547160APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DR VER UT TR 160A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547161APITS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UTTR 161 A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        OET
      Trucks

                      	 	
                        $0.60

                      	 	
                        3/1/2006

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547162APITS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 162 A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        OET
      Trucks

                      	 	
                        $0.60

                      	 	
                        3/1/2006

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547163APITS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 163 A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        OET
      Trucks

                      	 	
                        $0.60

                      	 	
                        3/1/2006

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742055470017PIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 17

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        REAGAN

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        6/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547017APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 17A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        REAGAN

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547185APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 185A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547167APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 187A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742055471SSAPIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 188A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Glasscock

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547169APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 169A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547018APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 18A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Glasscock

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547190APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 190A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547191APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 191A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547192APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 192A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547193APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 193A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547194APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 194A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        6/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547195APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 195A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205647199APITS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 199 A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        REAGAN

                      	 	
                        TX

                      	 	
                        OET
      Trucks

                      	 	
                        $0.60

                      	 	
                        3/1/2006

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547200APITS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 200 A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        REAGAN

                      	 	
                        TX

                      	 	
                        OET
      Trucks

                      	 	
                        $0.60

                      	 	
                        3/1/2008

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547201APITS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 201 A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        REAGAN

                      	 	
                        TX

                      	 	
                        OET
      Trucks

                      	 	
                        $0.60

                      	 	
                        3/1/2006

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547214APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UTTR 214A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        6/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547215APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 215A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      

                 

                
                  
                    
                    

                  

                  
                    
                    

                    
                      

                    

                  

                  
                    
                    

                  

                

                 

                	
                        74205547220APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 220A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0
      30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547221APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 221A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0
      30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547222APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 222A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0
      30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547226APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 226A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0
      30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742065470229PIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 229

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0
      30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547230APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 230A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74206547232APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 232A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0
      30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547047APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 47A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742055470062PIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 62

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Glasscock

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547062APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 62A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Glasscock

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0
      30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547067APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 67A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        REAGAN

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742054660MULPIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR 72

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Midland

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $030

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        74205547104APIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT TR104A

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        REAGAN

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0
      30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742055470001PIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT-1

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0
      30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742055470002PIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT-2

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        REAGAN

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742055470003PIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT-3

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Reagan

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0.30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742055470004PIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        SPRABERRY
      DRIVER UT-4

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Midland

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0
      30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742O64740000PIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        TANK
      FARM BATTERY

                      	 	
                        11/1/2005

                      	 	
                        100.00000000

                      	 	
                        MIDLAND

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        ($0.00)

                      	 	
                        11/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742055510000PIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        TIPPETT
      D

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Midland

                      	 	
                        TX

                      	 	
                        Centunon
      Pipeline

                      	 	
                        $0
      30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742089600000PIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        W
      H.WILDE

                      	 	
                        9/1/2008

                      	 	
                        100.00000000

                      	 	
                        REAGAN

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0
      30

                      	 	
                        9/1/2008

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      
	
                        742055630000PIPS

                      	 	
                        WTI

                      	 	
                        Pioneer
      Natural Resources

                      	 	
                        WINDHAM
      J

                      	 	
                        5/1/2005

                      	 	
                        100.00000000

                      	 	
                        Midland

                      	 	
                        TX

                      	 	
                        Centurion
      Pipeline

                      	 	
                        $0
      30

                      	 	
                        5/1/2005

                      	 	
                        119314

                      	 	
                        XP
      - Midland Sweet

                      

              

              

                
                  
                     

                  

                  
                     

                    
                      

                    

                  

                  
                     

                  

                

              

               

            

          

          
            
              	 
      	 
      	 
      	
                      5
      Greenway Plaza, Suite 110, Houston, Texas 77046-0521

                    
	
                      Occidental
      Energy Marketing, Inc.

                    	 
      	
                      P.O.
      Box 27570, Houston,
      Texas77227-7570

                    
	
                      A
      subsidiary of Occidental Petroleum
      Corporation

                    	 
      	
                      Phone
      713.215.7000

                    

            

          

           

          VIA FAX:
972-969-3574

          

          
            	
                    TO:

                  	
                    DEB
      STEWART - PIONEER NATURAL RESOURCES USA, INC. - PHONE
      972-969-3855

                  

          

          
            	
                    FROM:

                  	
                    MARK
      HAFNER- OCCIDENTAL ENERGY MARKETING, INC. - PHONE
    432-685-5884

                  

          

          

          
            	
                    REFERENCE:

                  	
                    OCCIDENTAL
      CONTRACT NUMBER: 0403-PNR-13604-P

                  

          

          
            	
                     
      

                  	
                    PIONEER
      NATURAL RESOURCES USA, INC. CONTRACT
NUMBER:

                  

          

          

          THIS FAX
CONFIRMS THE AGREEMENT BETWEEN DEB STEWART OF PIONEER NATURAL RESOURCES USA,
INC. AND MARK HAFNER OF OCCIDENTAL ENERGY MARKETING, INC. ON FEBRUARY 1, 2004.
THE FOLLOWING DETAILS ARE OCCIDENTAL'S UNDERSTANDING:

          

          
            	
                    SELLER:

                  	
                    PIONEER
      NATURAL RESOURCES USA, INC.
("PIONEER")

                  

          

          
            	
                    BUYER:

                  	
                    OCCIDENTAL
      ENERGY MARKETING, INC.
("OCCIDENTAL")

                  

          

           

          
            
              	
                      1.

                    	
                      VOLUME:     
      APPROXIMATELY 2,760 BARRELS PER DAY EXACT VOLUME EQUAL TO THE PRODUCTION
      FROM THE LEASES ON ATTACHED EXHIBIT
"A"

                    

            

            

            
              	
                      2.

                    	
                      QUALITY/GRADE:    
      WEST TEXAS INTERMEDIATE

                    

            

            

            
              	
                      3.

                    	
                      DELIVERY
      POINT:     TITLE AND RISK OF LOSS SHALL PASS
      FROM PIONEER TO OCCIDENTAL AS THE CRUDE OIL ENTERS THE FACILITIES OF
      TROJAN PIPELINE AND OCCIDENTAL'S DESIGNATED
  TRUCKER.

                    

            

            

            
              	
                      4.

                    	
                      TERM:     
      MARCH 1 - 31, 2004 AND CONTINUING MONTH TO MONTH THEREAFTER SUBJECT
      TO A 30 DAY ADVANCE WRITTEN NOTICE OF CANCELLATION BY EITHER
      PARTY.

                    

            

             

            
              	
                      5.

                    	
                      PRICE:     
      PRICE: OXY AGREES TO PAY PIONEER A PRICE PER BARREL EQUAL TO ONE OF
      THE THREE PRICING FORMULAS DESCRIBED BELOW. PIONEER SHALL HAVE THE RIGHT
      TO ELECT WHICH PRICING FORMULA IS USED ON A QUARTERLY BASIS. PIONEER SHALL
      NOTIFY OXY IN WRITING AT LEAST FIVE (5) DAYS PRIOR TO THE BEGINNING OF THE
      FIRST NYMEX TRADING MONTH OF ANY QUARTER. THE QUARTERLY PRICING FORMULA
      WILL DEFAULT TO THE PRECEDING QUARTER'S PRICING FORMULA IF PIONEER
      NEGLECTS TO NOTIFY OXY BY FIVE (5) DAYS PRIOR TO THE BEGINNING OF THE
      NYMEX TRADING MONTH FOR ANY GIYEN
QUARTER.

                    

            

             

          

          IT IS
HEREBY AGREED THAT PRICING FORMULA 3 WILL BE USED FOR MARCH 2004 AND WILL BE
USED FOR THE REMAINDER OF THE SECOND QUARTER OF 2004.

          

          FORMULA 1
- PLATT'S TRADING MONTH POSTING PLUS (MIDLAND)

          

          PRICE: KOCH PETROLEUM GROUP
L.P. MONTHLY EDQ POSTED PRICE FOR WEST TEXAS/NEW MEXICO INTERMEDIATE DEEMED 40.0
DEGREES FOR THE MONTH OF DELIVERY, PLUS THE AVERAGE OF THE *PLATTS DAILY
ASSESSMENTS OF WTI-P PLUS LESS THE DIFFERENCE BETWEEN (PLATTS WTI-CUSHING LESS
PLATTS WTI-MIDLAND) PLUS THE DELTA DOLLARS PER BARREL SET OUT ON EXHIBIT
"A".

          

          * NOTE
ALL PLATTS PRICING IS FOR THE DELIVERY MONTH AS PUBLISHED BY PLATTS DURING THE
PERIOD BEGINNING ON THE 26TH OF
THE SECOND MONTH PROCEEDING THE DELIVERY MONTH AND ENDING ON THE 25TH OF
THE MONTH PRECEEDING THE DELIVERY MONTH (CARRIED TO 4 DECIMAL
PLACES).

           

          
            
              
              

            

            
              
              

              
                

              

            

            
              
              

            

          

           

          
            
              FORMULA 2
- PLATT'S TRADING MONTH WT (MIDLAND)

              

              THE
AVERAGE OF THE MIDPOINTS OF THE ASSESSMENTS FOR PLATT'S TRADING MONTH WTI AT
MIDLAND, THE PLATT'S TRADING MIDLAND WTI VALUE SHALL BE THE MEAN DAILY AVERAGE,
AS PUBLISHED BY PLATTS DURING THE PERIOD BEGINNING ON THE 26th OF THE SECOND
MONTH PROCEEDING THE DELIVERY MONTH AND ENDING ON THE 25th OF THE MONTH
PRECEEDING THE DELIVERY MONTH (CARRIED TO 4 DECIMAL PLACES), PLUS THE DELTA
DOLLARS PER BARREL SET OUT ON EXHIBIT "A".

              

              FORMULA 3
- NYMEX TRADING MONTH DOMESTIC LIGHT SWEET (MIDLAND)

              

              THE
AVERAGE OF THE DAILY NYMEX SETTLEMENT PRICE FOR THE NEAR MONTH LIGHT SWEET CRUDE
OIL CONTRACT FOR THE PERIOD THAT THE DELIVERY MONTH TRADES AS THE PROMPT MONTH
(I.E. NYMEX TRADING MONTH), LESS THE DIFFERENCE BETWEEN (PLATTS WTI-CUSHING LESS
PLATTS WTI-MIDLAND) PLUS THE DELTA DOLLARS PER BARREL SET OUT ON EXHIBIT
"A".

              

              * NOTE ALL PLATTS PRICING IS
FOR THE DELIVERY MONTH AS PUBLISHED BY PLATTS DURING THE PERIOD BEGINNING ON THE
26th OF THE SECOND MONTH PROCEEDING THE DELIVERY MONTH AND ENDING ON THE 25th OF
THE MONTH PRECEEDING THE DELIVERY MONTH (CARRIED TO 4 DECIMAL
PLACES).

              

              
                	
                        6.

                      	
                        PAYMENT: PAYMENT UNDER
      THIS CONTRACT SHALL BE MADE BY WIRE TRANSFER ON THE TWENTIETH (20�)
      CALENDAR DAY OF THE MONTH FOLLOWING THE MONTH OF DELIVERY LESS APPLICABLE
      TAXES. IF THE PAYMENT DUE DATE FALLS ON A SATURDAY OR BANK HOLIDAY (EXCEPT
      MONDAY), PAYMENT WILL BE MADE ON THE PRECEDING BUSINESS DAY. IF PAYMENT
      DUE DATE FALLS ON A SUNDAY OR MONDAY HOLIDAY, PAYMENT WILL BE MADE ON THE
      FOLLOWING BUSINESS DAY. PAYMENT SHOULD BE MADE TO BANK OF AMERICA, FOR THE
      ACCOUNT OF PIONEER NATURAL RESOURCES USA, INC., ACCOUNT NO. 1290159897,
      ABA NO. 111000012.

                      

              

              

              
                	
                        7.

                      	
                        COMMENTS AND SPECIAL
      PROVISIONS: CONOCO'S GENERAL TERMS AND CONDITIONS TO
      APPLY.

                      

              

              

              
                	
                        APPROVED
      BY:

                      	
                        /S/ JOHN T. MCWHORTER

                      	 
	 
      	
                        JOHN
      T. MCWHORTER

                      	 
	 
      	
                        OCCIDENTAL
      ENERGY MARKETING, INC.

                      	 
	 
      	 
      	 
	
                        APPROVED
      BY:

                      	
                        /S/ HERSHAL K. WOLFE

                      	 
	 
      	
                        PIONEER
      NATURAL RESOURCES USA, INC.

                      	 
	 
      	
                        HERSHAL
      K. WOLFE

                      	 
	 
      	
                        DIRECTOR
      - MARKETING

                      	 

              

              
                
                   

                

                
                   

                  
                    

                  

                

                
                   

                

              

              EXHIBIT
"A"

              

              OEMI'S
Contract #0403-PNR-13604-P

              Contract
#

              Allegro
Contract #114666

              

              
                	
                        Crude
      Type

                      	 
      	
                        Transporter

                      	 
      	
                        Start
      Date

                      	 
      	
                        Carrrier

                        Lease
      ID

                        #

                      	 
      	
                        EMOC

                        RC

                      	 
      	
                        RPC

                         

                      	 
      	
                        DO

                         

                      	 
      	
                        Decimal

                      	 
      	
                        Old
      XOM

                        Contract
      #

                      	 
      	
                        Operator

                         

                      	 
      	
                        Lease
      Name

                      	 
      	
                        ALLEGO
      LEASE NAME

                      	 
      	
                        OXY
      Lease #

                         

                      	 
      	
                        County

                         

                      	 
      	
                        State

                         

                      	 
      	
                        B/D

                         

                      	 
      	
                        Lease

                        Delta

                      
	
                        WTI

                      	 
      	
                        Genesis
      Trks

                      	 
      	
                        03/01/2004

                      	 
      	
                        51455

                      	 
      	
                        56107

                      	 
      	
                        56107

                      	 
      	
                        75179

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        ALLEEN
      O'BRIEN 6, 43, BK BOONE

                      	 
      	
                        ALLEEN
      OBRIEN 6,43, BK BOONE

                      	 
      	
                        742054710000PITS

                      	 
      	
                        Midland

                      	 
      	
                        TX

                      	 
      	
                        53

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Genesis
      Trks

                      	 
      	
                        03/01/2004

                      	 
      	
                        51457

                      	 
      	
                        55916

                      	 
      	
                        55916

                      	 
      	
                        75026

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        H L
      MCCLINTE

                      	 
      	
                        H L
      MCCLINTE

                      	 
      	
                        742055040000PITS

                      	 
      	
                        Midland

                      	 
      	
                        TX

                      	 
      	
                        56

                      	 
      	
                        -0.60

                      
	
                        WTI

                      	 
      	
                        Genesis
      Trks

                      	 
      	
                        03/01/2004

                      	 
      	
                        57251

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75564

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 1 A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 1 A

                      	 
      	
                        74205530001APITS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        1

                      	 
      	
                        -0.60

                      
	
                        WTI

                      	 
      	
                        Genesis
      Trks

                      	 
      	
                        03/01/2004

                      	 
      	
                        57027

                      	 
      	
                        55598

                      	 
      	
                        68286

                      	 
      	
                        75564

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UN IT TR 19 A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 19 A

                      	 
      	
                        7420553001SAPITS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        1

                      	 
      	
                        -0.60

                      
	
                        WTI

                      	 
      	
                        Genesis
      Trks

                      	 
      	
                        03/01/2004

                      	 
      	
                        57040

                      	 
      	
                        55598

                      	 
      	
                        76621

                      	 
      	
                        75551

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 39

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 39

                      	 
      	
                        742055300039PITS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        1

                      	 
      	
                        -0.60

                      
	
                        WTI

                      	 
      	
                        Genesis
      Trks

                      	 
      	
                        03/01/2004

                      	 
      	
                        52782

                      	 
      	
                        55598

                      	 
      	
                        68286

                      	 
      	
                        75564

                      	 
      	
                        1.00000000

                      	 
      	
                        BOH

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR39 A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 39 A

                      	 
      	
                        74205530039APITS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        66

                      	 
      	
                        -0.60

                      
	
                        WTI

                      	 
      	
                        Genesis
      Trks

                      	 
      	
                        03/01/2004

                      	 
      	
                        57248

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75564

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 5-2

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 5-2

                      	 
      	
                        742055300052PITS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        1

                      	 
      	
                        -0.60

                      
	
                        WTI

                      	 
      	
                        Genesis
      Trks

                      	 
      	
                        03/01/2004

                      	 
      	
                        57249

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75564

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 5-4

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 5-4

                      	 
      	
                        742055300054PITS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        1

                      	 
      	
                        -0.60

                      
	
                        WTI

                      	 
      	
                        Genesis
      Trks

                      	 
      	
                        03/01/2004

                      	 
      	
                        57250

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75564

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 5-42

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 5-42

                      	 
      	
                        742055300542PITS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        1

                      	 
      	
                        -0.60

                      
	
                        WTI

                      	 
      	
                        Genesis
      Trks

                      	 
      	
                        03/01/2004

                      	 
      	
                        51456

                      	 
      	
                        56107

                      	 
      	
                        56107

                      	 
      	
                        75179

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        ALLEEN
      OBREN 6, 43, BK BOONE

                      	 
      	
                        OBRIEN
      A

                      	 
      	
                        742058290000PITS

                      	 
      	
                        Midland

                      	 
      	
                        TX

                      	 
      	
                        53

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Genesis
      Trks

                      	 
      	
                        03/01/2004

                      	 
      	
                        53001

                      	 
      	
                        55671

                      	 
      	
                        74595

                      	 
      	
                        74654

                      	 
      	
                        0.96217683

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SPRABERRY
      DRIVER UNIT TR 161 A

                      	 
      	
                        SPRABERRY
      DRIVER UT TR 161 A

                      	 
      	
                        74205547161APITS

                      	 
      	
                        Reagan

                      	 
      	
                        TX

                      	 
      	
                        1

                      	 
      	
                        -0.60

                      
	
                        WTI

                      	 
      	
                        Genesis
      Trks

                      	 
      	
                        03/01/2004

                      	 
      	
                        53079

                      	 
      	
                        55671

                      	 
      	
                        74575

                      	 
      	
                        74654

                      	 
      	
                        0.96217683

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SPRABERRY
      DRIVER UNIT TR 162 A

                      	 
      	
                        SPRABERRY
      DRIVER UT TR 162 A

                      	 
      	
                        74205547162APITS

                      	 
      	
                        Reagan

                      	 
      	
                        TX

                      	 
      	
                        68

                      	 
      	
                        -0.60

                      
	
                        WTI

                      	 
      	
                        Genesis
      Trks

                      	 
      	
                        03/01/2004

                      	 
      	
                        53088

                      	 
      	
                        55671

                      	 
      	
                        74575

                      	 
      	
                        74654

                      	 
      	
                        0.96217683

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SPRABERRY
      DRIVER UNIT TR 163 A

                      	 
      	
                        SPRABERRY
      DRIVER UT TR 163 A

                      	 
      	
                        74205547163APITS

                      	 
      	
                        Reagan

                      	 
      	
                        TX

                      	 
      	
                        1

                      	 
      	
                        -0.60

                      
	
                        WTI

                      	 
      	
                        Genesis
      Trks

                      	 
      	
                        03/01/2004

                      	 
      	
                        53113

                      	 
      	
                        55671

                      	 
      	
                        76570

                      	 
      	
                        74655

                      	 
      	
                        0.96217683

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SPRABERRY
      DRIVER UNIT TR 199 A

                      	 
      	
                        SPRABERRY
      DRIVER UT TR 199 A

                      	 
      	
                        74205547199APITS

                      	 
      	
                        Reagan

                      	 
      	
                        TX

                      	 
      	
                        1

                      	 
      	
                        -0.60

                      
	
                        WTI

                      	 
      	
                        Genesis
      Trks

                      	 
      	
                        03/01/2004

                      	 
      	
                        52988

                      	 
      	
                        55671

                      	 
      	
                        76570

                      	 
      	
                        74655

                      	 
      	
                        0.96217683

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SPRABERRY
      DRIVER UNIT TR 200 A

                      	 
      	
                        SPRABERRY
      DRIVER UT TR 200 A

                      	 
      	
                        74205547200APITS

                      	 
      	
                        Reagan

                      	 
      	
                        TX

                      	 
      	
                        60

                      	 
      	
                        -0.60

                      
	
                        WTI

                      	 
      	
                        Genesis
      Trks

                      	 
      	
                        03/01/2004

                      	 
      	
                        53006

                      	 
      	
                        55671

                      	 
      	
                        76570

                      	 
      	
                        74655

                      	 
      	
                        0.96217683

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SPRABERRY
      DRIVER UNIT TR 201 A

                      	 
      	
                        SPRABERRY
      DRIVER UT TR 201 A

                      	 
      	
                        74205547201APITS

                      	 
      	
                        Reagan

                      	 
      	
                        TX

                      	 
      	
                        1

                      	 
      	
                        -0.60

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845807

                      	 
      	
                        55939

                      	 
      	
                        55939

                      	 
      	
                        75593

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        COX
      B

                      	 
      	
                        COX
      B

                      	 
      	
                        742054820000PIPS

                      	 
      	
                        Glasscock

                      	 
      	
                        TX

                      	 
      	
                        1

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845587

                      	 
      	
                        55933

                      	 
      	
                        55933

                      	 
      	
                        75540

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        CUNNINGHAM
      16

                      	 
      	
                        CUNNINGHAM
      16

                      	 
      	
                        742054830000PIPS

                      	 
      	
                        Midland

                      	 
      	
                        TX

                      	 
      	
                        2

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845588

                      	 
      	
                        55936

                      	 
      	
                        55936

                      	 
      	
                        75541

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        CUNNINGHAM
      16-A

                      	 
      	
                        CUNNINGHAM
      16-A

                      	 
      	
                        742054S40000PIPS

                      	 
      	
                        Midland

                      	 
      	
                        TX

                      	 
      	
                        8

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845642

                      	 
      	
                        55591

                      	 
      	
                        55591

                      	 
      	
                        75546

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        CUNNINGHAM
      B

                      	 
      	
                        CUNNINGHAM
      B

                      	 
      	
                        742054850000PIPS

                      	 
      	
                        Midland

                      	 
      	
                        TX

                      	 
      	
                        26

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845672

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR21A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 21A

                      	 
      	
                        74205530021APPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        119

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845684

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR86A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 86A

                      	 
      	
                        74205530086APIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        14

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845691

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR88A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 88A

                      	 
      	
                        74205530088APIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        11

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845671

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 20A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 20A

                      	 
      	
                        74205530020APIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        41

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845673

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 22A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UTTR22A

                      	 
      	
                        74205530022APIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        70

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845675

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 2A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 2A

                      	 
      	
                        74205530002APIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        14

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845676

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 3A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 3A

                      	 
      	
                        74205530003APIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        47

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845688

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 40A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 40A

                      	 
      	
                        74205530040APIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        32

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845689

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 42A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 42A

                      	 
      	
                        74205530042APIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        6

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845754

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 43A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 43A

                      	 
      	
                        74205530043APIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        10

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845674

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 45A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 45A

                      	 
      	
                        7420553045APIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        24

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845690

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 48A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 48A

                      	 
      	
                        7420553004SAPIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        12

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845694

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 51A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 51A

                      	 
      	
                        74205530051APIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        11

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845679

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 52A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 52A

                      	 
      	
                        74205530052APIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        14

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845698

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 53A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 53A

                      	 
      	
                        74205530053APIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        20

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845695

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 68A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 68A

                      	 
      	
                        7420553006SAPIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        7

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845696

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 69A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 69A

                      	 
      	
                        74205530069APIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        10

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845677

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 6A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 6A

                      	 
      	
                        74205530006APIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        35

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845680

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR70A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 70A

                      	 
      	
                        74205530070APIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        43

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845697

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 71A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 71A

                      	 
      	
                        74205530071APIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        21

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845678

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 7A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 7A

                      	 
      	
                        74205530007APIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        52

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845683

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 85A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 85A

                      	 
      	
                        74205530085APIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        33

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845692

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 89A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT T R89A

                      	 
      	
                        74205530089APIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        30

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845693

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR90A

                      	 
      	
                        N.
      PEMBROOK SPRABERRY UT TR 90A

                      	 
      	
                        74205530090APIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        45

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        251018

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 6

                      	 
      	
                        N.
      PEMBROOK SPRBY UT TR 6/67/85

                      	 
      	
                        742055240000PIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        11

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        251018

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 67

                      	 
      	
                        N.
      PEMBROOK SPRBY UT TR 6/67/85

                      	 
      	
                        742055240000PIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        4

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        251016

                      	 
      	
                        55598

                      	 
      	
                        55598

                      	 
      	
                        75550

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        NORTH
      PEMBROOK SPRABERRY UNIT TR 85

                      	 
      	
                        N.
      PEMBROOK SPRBY UT TR 6/67/85

                      	 
      	
                        742055240000PIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        15

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845894

                      	 
      	
                        55968

                      	 
      	
                        55968

                      	 
      	
                        75605

                      	 
      	
                        1.00000000

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SHERROD
      44

                      	 
      	
                        SHERROD
      44

                      	 
      	
                        742055430000PIPS

                      	 
      	
                        Upton

                      	 
      	
                        TX

                      	 
      	
                        2

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        291058

                      	 
      	
                        55671

                      	 
      	
                        60639

                      	 
      	
                        74650

                      	 
      	
                        0.94445940

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SPBY
      DRIVER 101/105/153/159/193/215/221

                      	 
      	
                        SPBY
      DRIVER-PON PL

                      	 
      	
                        742055460000PIPS

                      	 
      	
                        Reagan

                      	 
      	
                        TX

                      	 
      	
                        86

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845366

                      	 
      	
                        55671

                      	 
      	
                        60640

                      	 
      	
                        74652

                      	 
      	
                        0.96217680

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SPRABERRY
      DRIVER UNIT TR 12A

                      	 
      	
                        SPRABERRY
      DRIVER UT- TR 12A

                      	 
      	
                        74205547012APIPS

                      	 
      	
                        Reagan

                      	 
      	
                        TX

                      	 
      	
                        55

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845452

                      	 
      	
                        55671

                      	 
      	
                        55671

                      	 
      	
                        74653

                      	 
      	
                        0.96217600

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SPRABERRY
      DRIVER UNIT TR 160A

                      	 
      	
                        SPRABERRY
      DRIVER UT- TR 160A

                      	 
      	
                        74205547160APIPS

                      	 
      	
                        Reagan

                      	 
      	
                        TX

                      	 
      	
                        28

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845713

                      	 
      	
                        55671

                      	 
      	
                        55671

                      	 
      	
                        74653

                      	 
      	
                        0.96217600

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SPRABERRY
      DRIVER UNIT TR 185A

                      	 
      	
                        SPRABERRY
      DRIVER UT- TR 185A

                      	 
      	
                        74205547185APIPS

                      	 
      	
                        Reagan

                      	 
      	
                        TX

                      	 
      	
                        11

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845369

                      	 
      	
                        55671

                      	 
      	
                        55671

                      	 
      	
                        74653

                      	 
      	
                        0.96217600

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SPRABERRY
      DRIVER UNIT TR 188A

                      	 
      	
                        SPRABERRY
      DRIVER UT- TR 188A

                      	 
      	
                        74205547188APIPS

                      	 
      	
                        Glasscock

                      	 
      	
                        TX

                      	 
      	
                        12

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845373

                      	 
      	
                        55671

                      	 
      	
                        55671

                      	 
      	
                        74653

                      	 
      	
                        0.96217600

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SPRABERRY
      DRIVER UNIT TR 194A

                      	 
      	
                        SPRABERRY
      DRIVER UT- TR 194A

                      	 
      	
                        74205547194APIPS

                      	 
      	
                        Reagan

                      	 
      	
                        TX

                      	 
      	
                        21

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845469

                      	 
      	
                        55671

                      	 
      	
                        55671

                      	 
      	
                        74653

                      	 
      	
                        0.96217600

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SPRABERRY
      DRIVER UNIT TR 195A

                      	 
      	
                        SPRABERRY
      DRIVER UT- TR 195A

                      	 
      	
                        74205547195APIPS

                      	 
      	
                        Reagan

                      	 
      	
                        TX

                      	 
      	
                        88

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845368

                      	 
      	
                        55671

                      	 
      	
                        55671

                      	 
      	
                        74653

                      	 
      	
                        0.96217600

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SPRABERRY
      DRIVER UNIT TR 215A

                      	 
      	
                        SPRABERRY
      DRIVER UT- TR 215A

                      	 
      	
                        74205547215APIPS

                      	 
      	
                        Reagan

                      	 
      	
                        TX

                      	 
      	
                        14

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845905

                      	 
      	
                        55671

                      	 
      	
                        55671

                      	 
      	
                        74653

                      	 
      	
                        0.96217600

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SPRABERRY
      DRIVER UNIT TR 222A

                      	 
      	
                        SPRABERRY
      DRIVER UT- TR 222A

                      	 
      	
                        74205547222APIPS

                      	 
      	
                        Reagan

                      	 
      	
                        TX

                      	 
      	
                        4

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845708

                      	 
      	
                        55671

                      	 
      	
                        55671

                      	 
      	
                        74653

                      	 
      	
                        0.96217600

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SPRABERRY
      DRIVER UNIT TR 232A

                      	 
      	
                        SPRABERRY
      DRIVER UT- TR 232A

                      	 
      	
                        74205547232APIPS

                      	 
      	
                        Reagan

                      	 
      	
                        TX

                      	 
      	
                        40

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845904

                      	 
      	
                        55671

                      	 
      	
                        55671

                      	 
      	
                        74653

                      	 
      	
                        0.96217600

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SPRABERRY
      DRIVER UNIT TR 221A

                      	 
      	
                        SPRABERRY
      DRIVER UT-TR 221A

                      	 
      	
                        74205547221APIPS

                      	 
      	
                        Reagan

                      	 
      	
                        TX

                      	 
      	
                        19

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845829

                      	 
      	
                        55671

                      	 
      	
                        55671

                      	 
      	
                        74653

                      	 
      	
                        0.96217600

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SPRABERRY
      DRIVER UNITTR 101A

                      	 
      	
                        SPRABERRY
      DRIVER UT- TR 101A

                      	 
      	
                        74205547101APIPS

                      	 
      	
                        Reagan

                      	 
      	
                        TX

                      	 
      	
                        180

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845492

                      	 
      	
                        55671

                      	 
      	
                        55671

                      	 
      	
                        74653

                      	 
      	
                        0.96217600

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SPRABERRY
      DRIVER UNIT TR 102A

                      	 
      	
                        SPRABERRY
      DRIVER UT- TR 102A

                      	 
      	
                        74205547102APIPS

                      	 
      	
                        Reagan

                      	 
      	
                        TX

                      	 
      	
                        70

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845700

                      	 
      	
                        55671

                      	 
      	
                        55671

                      	 
      	
                        74653

                      	 
      	
                        0.96217600

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SPRABERRY
      DRIVER UNIT TR 105A

                      	 
      	
                        SPRABERRY
      DRIVER UT- TR 105A

                      	 
      	
                        74205547105APIPS

                      	 
      	
                        Reagan

                      	 
      	
                        TX

                      	 
      	
                        19

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845847

                      	 
      	
                        55671

                      	 
      	
                        60640

                      	 
      	
                        74652

                      	 
      	
                        0.96217680

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SPRABERRY
      DRIVER UNIT TR 11A

                      	 
      	
                        SPRABERRY
      DRIVER UT- TR 11A

                      	 
      	
                        74205547011APIPS

                      	 
      	
                        Reagan

                      	 
      	
                        TX

                      	 
      	
                        15

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845494

                      	 
      	
                        55671

                      	 
      	
                        55671

                      	 
      	
                        74653

                      	 
      	
                        0.96217600

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SPRABERRY
      DRIVER UNITTR 130A

                      	 
      	
                        SPRABERRY
      DRIVER UT-TR 130A

                      	 
      	
                        74205547130APIPS

                      	 
      	
                        Reagan

                      	 
      	
                        TX

                      	 
      	
                        23

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845709

                      	 
      	
                        55671

                      	 
      	
                        55671

                      	 
      	
                        74653

                      	 
      	
                        0.96217600

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SPRABERRY
      DRIVER UNITTR 131A

                      	 
      	
                        SPRABERRY
      DRIVER UT- TR 131A

                      	 
      	
                        74205547131APIPS

                      	 
      	
                        Reagan

                      	 
      	
                        TX

                      	 
      	
                        38

                      	 
      	
                        -0.30

                      
	
                        WTI

                      	 
      	
                        Trojan
      Pl

                      	 
      	
                        03/01/2004

                      	 
      	
                        845962

                      	 
      	
                        55671

                      	 
      	
                        60641

                      	 
      	
                        74699

                      	 
      	
                        0.94445940

                      	 
      	
                        B014

                      	 
      	
                        PIONEER
      NATURAL RES. USA, INC.

                      	 
      	
                        SPRABERRY
      DRIVER UNITTR 14

                      	 
      	
                        SPRABERRY
      DRIVER UT- TR 14

                      	 
      	
                        742055470014PIPS

                      	 
      	
                        Reagan

                      	 
      	
                        TX

                      	 
      	
                        18

                      	 
      	
                        -0.30

                      

              

               

              
                
                  
                  

                

                
                  
                  

                  
                    

                  

                

                
                  
                  

                

              

               

              
                
                  	
                          Crude
      Type

                        	 
      	
                          Transporter

                        	 
      	
                          Start
      Data

                        	 
      	
                          Carrier
      Lease ID #

                        	 
      	
                          EMOC
      RC

                        	 
      	
                          RPC

                        	 
      	
                          DO

                        	 
      	
                          Decimal

                        	 
      	
                          Old
      XOM Contract #

                        	 
      	
                          Operator

                        	 
      	
                          Lease
      Name

                        	 
      	
                          ALLEGO
      LEASE NAME

                        	 
      	
                          0XY
      Lease #

                        	 
      	
                          County

                        	 
      	
                          State

                        	 
      	
                          B7D

                        	 
      	
                          Lease
      Delta

                        
	
                          WTI

                        	 
      	
                          Trojan pi

                        	 
      	
                          03/01/2004

                        	 
      	
                          845699

                        	 
      	
                          55671

                        	 
      	
                          55671

                        	 
      	
                          74653

                        	 
      	
                          0.96217600

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNrT
      TR 151A

                        	 
      	
                          SPRABERRY
      DRIVER UT- TR 151A

                        	 
      	
                          74205547151APIPS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          25

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan pi

                        	 
      	
                          03/01/2004

                        	 
      	
                          845498

                        	 
      	
                          55671

                        	 
      	
                          55671

                        	 
      	
                          74653

                        	 
      	
                          0.96217600

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNIT TR 152A

                        	 
      	
                          SPRABERRY
      DRIVER UT-TR
      152A

                        	 
      	
                          74205547152AP1PS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          21

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan
      R

                        	 
      	
                          03701/2004

                        	 
      	
                          845592

                        	 
      	
                          55671

                        	 
      	
                          55671

                        	 
      	
                          74653

                        	 
      	
                          0.96217600

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNrT
      TR 153A

                        	 
      	
                          SPRABERRY
      DRIVER UT-TR
      153A

                        	 
      	
                          74205547153APIPS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          73

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          845714

                        	 
      	
                          55671

                        	 
      	
                          55671

                        	 
      	
                          74653

                        	 
      	
                          0.96217600

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNrT
      TR 187A

                        	 
      	
                          SPRABERRY
      DRIVER UT- TR 187A

                        	 
      	
                          74205547187APIPS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          71

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan pi

                        	 
      	
                          03/01/2004

                        	 
      	
                          645372

                        	 
      	
                          55671

                        	 
      	
                          55671

                        	 
      	
                          74653

                        	 
      	
                          0.96217600

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNIT TR 189A

                        	 
      	
                          SPRABERRY
      DRIVER UT- TR 189A

                        	 
      	
                          74205547189APIPS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          16

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          845820

                        	 
      	
                          55671

                        	 
      	
                          60640

                        	 
      	
                          74652

                        	 
      	
                          0.96217680

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNIT TR 18

                        	 
      	
                          SPRABERRY
      DRIVER UT-TR 18A

                        	 
      	
                          74205547018APIPS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          15

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan pi

                        	 
      	
                          03/01/2004

                        	 
      	
                          845371

                        	 
      	
                          55671

                        	 
      	
                          55671

                        	 
      	
                          74653

                        	 
      	
                          0.96217600

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNITTR 190A

                        	 
      	
                          SPRABERRY
      DRIVER UT-TR 190A

                        	 
      	
                          74205547190APPS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          30

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          645370

                        	 
      	
                          55671

                        	 
      	
                          55671

                        	 
      	
                          74653

                        	 
      	
                          0.96217600

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNIT TR 191A

                        	 
      	
                          SPRABERRY
      DRIVER UT- TR 191A

                        	 
      	
                          74205547191APIPS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          16

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan pi

                        	 
      	
                          03/01/2004

                        	 
      	
                          845702

                        	 
      	
                          55671

                        	 
      	
                          55671

                        	 
      	
                          74653

                        	 
      	
                          0.98217600

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNIT TR 192A

                        	 
      	
                          SPRABERRY
      DRIVER UT- TR 192A

                        	 
      	
                          74205547192APPS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          11

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan pi

                        	 
      	
                          03/01/2004

                        	 
      	
                          845703

                        	 
      	
                          55671

                        	 
      	
                          55671

                        	 
      	
                          74653

                        	 
      	
                          0.96217600

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNIT TR 193A

                        	 
      	
                          SPRABERRY
      DRIVER UT-TR 193A

                        	 
      	
                          74205547193APIPS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          34

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan pi

                        	 
      	
                          03/01/2004

                        	 
      	
                          845383

                        	 
      	
                          55671

                        	 
      	
                          55671

                        	 
      	
                          74653

                        	 
      	
                          0.96217600

                        	 
      	
                          B0H

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNrT TR 220A

                        	 
      	
                          SPRABERRY
      DRIVER UT- TR 220A

                        	 
      	
                          74205547220APIPS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          50

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan pi

                        	 
      	
                          03/01/2004

                        	 
      	
                          845794

                        	 
      	
                          55671

                        	 
      	
                          55671

                        	 
      	
                          74653

                        	 
      	
                          0.96217600

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNrT
      TR 226A

                        	 
      	
                          SPRABERRY
      DRIVER UT- TR 226A

                        	 
      	
                          74205547226APIPS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          94

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan pi

                        	 
      	
                          03/01/2004

                        	 
      	
                          845729

                        	 
      	
                          55671

                        	 
      	
                          55671

                        	 
      	
                          74653

                        	 
      	
                          0.96217600

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNrT
      TR 229

                        	 
      	
                          SPRABERRY
      DRIVER UT- TR 229

                        	 
      	
                          742055470229PIPS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          41

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan pi

                        	 
      	
                          03/01/2004

                        	 
      	
                          845930

                        	 
      	
                          55671

                        	 
      	
                          55671

                        	 
      	
                          74653

                        	 
      	
                          0.96217600

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNIT TR 230A

                        	 
      	
                          SPRABERRY
      DRIVER UT- TR 230A

                        	 
      	
                          74205547230APIPS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          19

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          845451

                        	 
      	
                          55671

                        	 
      	
                          55671

                        	 
      	
                          74653

                        	 
      	
                          0.96217600

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNrT
      TR 47A

                        	 
      	
                          SPRABERRY
      DRIVER UT- TR
      47A

                        	 
      	
                          74205547047AP1PS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          32

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          845965

                        	 
      	
                          55671

                        	 
      	
                          60641

                        	 
      	
                          74699

                        	 
      	
                          0.94445940

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNIT TR 62

                        	 
      	
                          SPRABERRY
      DRIVER UT- TR 62

                        	 
      	
                          742055470062PIPS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          19

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          845966

                        	 
      	
                          55671

                        	 
      	
                          60640

                        	 
      	
                          74652

                        	 
      	
                          0.96217680

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNIT TR 62A

                        	 
      	
                          SPRABERRY
      DRIVER UT-TR 62A

                        	 
      	
                          74205547062APIPS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          18

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          845503

                        	 
      	
                          55671

                        	 
      	
                          55671

                        	 
      	
                          74653

                        	 
      	
                          0.96217600

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNIT TR 154A

                        	 
      	
                          SPRABERRY
      DRIVER UT TR 154A

                        	 
      	
                          74205547154APIPS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          17

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          845314

                        	 
      	
                          55671

                        	 
      	
                          60184

                        	 
      	
                          74651

                        	 
      	
                          0.96217680

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNIT TR 214A

                        	 
      	
                          SPRABERRY
      DRIVER UT TR 214A

                        	 
      	
                          74205547214APIPS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          31

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          845963

                        	 
      	
                          55671

                        	 
      	
                          60640

                        	 
      	
                          74652

                        	 
      	
                          0.96217680

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNIT TR 17

                        	 
      	
                          SPRABERRY
      DRIVER UT TR 17

                        	 
      	
                          742055470017PIPS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          7

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          B45964

                        	 
      	
                          55671

                        	 
      	
                          60641

                        	 
      	
                          74699

                        	 
      	
                          0.94445940

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNIT TR 17A

                        	 
      	
                          SPRABERRY
      DRIVER UT TR 17A

                        	 
      	
                          74205547017APIPS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          11

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          845812

                        	 
      	
                          55671

                        	 
      	
                          60184

                        	 
      	
                          74651

                        	 
      	
                          0.96217680

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNIT TR 67A

                        	 
      	
                          SPRABERRY
      DRIVER UT TR 87A

                        	 
      	
                          74205547087APIPS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          24

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          845507

                        	 
      	
                          55671

                        	 
      	
                          55671

                        	 
      	
                          74653

                        	 
      	
                          0.96217600

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNIT TR 104A

                        	 
      	
                          SPRABERRY
      DRIVER UTTR104A

                        	 
      	
                          74205547104APIPS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          15

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          845382

                        	 
      	
                          55671

                        	 
      	
                          55671

                        	 
      	
                          74653

                        	 
      	
                          0.96217600

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNIT TR219A

                        	 
      	
                          SPRABERRY
      DRIVER UT-1

                        	 
      	
                          742055470001PIPS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          4

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          845508

                        	 
      	
                          55671

                        	 
      	
                          55671

                        	 
      	
                          74653

                        	 
      	
                          0.96217600

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNIT TR 159A

                        	 
      	
                          SPRABERRY
      DRIVER UT-2

                        	 
      	
                          742055470002PIPS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          15

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          845832

                        	 
      	
                          55671

                        	 
      	
                          55671

                        	 
      	
                          74653

                        	 
      	
                          0.96217600

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNIT TR 129A

                        	 
      	
                          SPRABERRY
      DRIVER UT-3

                        	 
      	
                          742055470003PIPS

                        	 
      	
                          Reagan

                        	 
      	
                          TX

                        	 
      	
                          7

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          845914

                        	 
      	
                          55671

                        	 
      	
                          60184

                        	 
      	
                          74651

                        	 
      	
                          0.96217680

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          SPRABERRY
      DRIVER UNIT TR72A

                        	 
      	
                          SPRABERRY
      DRIVER UT-4

                        	 
      	
                          742055470004PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          6

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          845600

                        	 
      	
                          55589

                        	 
      	
                          55590

                        	 
      	
                          75544

                        	 
      	
                          1.00000000

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          TIPPETT
      D

                        	 
      	
                          TIPPETT
      D

                        	 
      	
                          742055510000PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          150

                        	 
      	
                          -0.30

                        
	
                          WTI

                        	 
      	
                          Trojan
      PI

                        	 
      	
                          03/01/2004

                        	 
      	
                          200001

                        	 
      	
                          55935

                        	 
      	
                          55935

                        	 
      	
                          75736

                        	 
      	
                          1.00000000

                        	 
      	
                          B014

                        	 
      	
                          PIONEER
      NATURAL RES.

                          USA,
      INC.

                        	 
      	
                          WINDHAM
      J

                        	 
      	
                          WINDHAM
      J

                        	 
      	
                          742055630000PIPS

                        	 
      	
                          Midland

                        	 
      	
                          TX

                        	 
      	
                          11

                        	 
      	
                          -0.30

                        
	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                          2760

                        	 
      	 

                

                 

              

            

          

          
            
              
              

            

            
              
              

              
                

              

            

            
              
              

            

          

           

        

      

      
        	 	
                Occidental
      Energy Marketing, Inc.

              	
                5
      Greenways Plaza, Suite 110, Houston, Texas 77046-0521

                P.O.
      Box 27570, Houston, Texas 77227-7570

                Phone
      713.215.7000

              
	
                A
      subsidiary of Occidental Petroleum Corporation

              	 
      

      

       

       

      CRUDE
OIL CONTRACT AMENDMENT No. 5

       

      VIA FAX:

       

      

      
        	
                TO:

              	
                Pioneer
      Natural Resources USA, Inc.

              	 
      
	 
      	
                Attn:
      Contract Management Services

              	
                                                 

              
	 
      	
                Fax:
      (972)969-3574

              	 
      
	 
      	
                Trader:
      Deb Stewart

              	 
      
	 
      	 
      	 
      
	
                FROM:

              	
                Occidental
      Energy Marketing, Inc.

              	 
      
	 
      	
                Trader:
      Marc Abbott

              	 
      
	 
      	 
      	 
      
	
                RE:

              	
                Occidental
      Contract # 0403-PNR-13605-P

              	
                Amendment
      #5

              

      

       

      This
Amendment Number 5 to the Crude Oil Contract between Occidental Energy
Marketing, Inc. ("OEMI") and Pioneer Natural Resources USA, Inc. ("Counterparty)
dated March, 2004 (the "Contract") is entered into as of December 16,
2009.

       

      For good
and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged and agreed, the Parties agree that the Contract is hereby amended
effective December 1, 2009 as set forth below.

       

      Delete
the O Neal and J W Driver #7 leases off the contract and Exhibit "A" due to
these leases being commingled into other leases.

       

      All other
terms of the agreement are unchanged.

       

      Agreed to
and approved by: OEMI

       

      
        	 
      	 
      
	
                /s/
      Marc Abbott

              	 
      
	
                Marc
      Abbott

              	 
      
	
                Manager,
      Crude Oil Acquisitions

              	 
      
	 
      	 
      
	
                Agreed
      to and approved by:

              	 
      
	
                PioneepNatural
      Resources USA, Inc.

              	 
      
	 	 
	/s/
      Hershal
      K. Wolfe 	 
      
	
                Hershal
      K. Wolfe

              	 
      
	
                Vice
      President Marketing

              	 
      

      

       

      
        
           

        

        
           

          
            

          

        

        
           

        

      

       

      EXHIBIT
"A"

      OEMI'S
Contract #0403-PNR-13605-P#4 

      Contract
# 

      Allegro
Contract #119309

       

      
        	
                Crude
      Type

              	 
      	
                Transporter

              	 
      	
                Start
      Date

              	 
      	
                Carrrler
      Lease ID#

              	 
      	
                EMOC
      RC

              	 
      	
                RPC

              	 
      	
                DO

              	 
      	
                Decimal

              	 
      	
                Old
      XOM Contract #

              	 
      	
                Operator

              	 
      	
                Lease
      Name

              	 
      	
                OXY
      ALLEGO LEASE NAME

              	 
      	
                OXY
      Lease #

              	 
      	
                County

              	 
      	
                State

              	 
      	
                Location
      Differential

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                08/01/2007

              	 
      	
                60015

              	 
      	 
      	 
      	 
      	 
      	 
      	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA. INC

              	 
      	
                EISNER
      CHRISTY

              	 
      	
                EISNER
      CHRISTY

              	 
      	
                742074790000PITS

              	 
      	
                Reagan

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Tries

              	 
      	
                03/01/2004

              	 
      	
                46451

              	 
      	
                56059

              	 
      	
                56059

              	 
      	
                75159

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                BIZZELL
      A

              	 
      	
                BIZZELL
      A

              	 
      	
                742054740000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                46681

              	 
      	
                59211

              	 
      	
                78015

              	 
      	
                76706

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                BIZZELLE
      B UNIT

              	 
      	
                BIZZELLE
      B UT

              	 
      	
                742054750000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                46290

              	 
      	
                59209

              	 
      	
                78014

              	 
      	
                76703

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                BIZZELLE
      UNIT#1

              	 
      	
                BIZZELLE
      UT #1

              	 
      	
                742054760000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                46990

              	 
      	
                59198

              	 
      	
                59198

              	 
      	
                76552

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                BONNIE
      UNIT

              	 
      	
                BONNIE
      UT

              	 
      	
                742054770000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                46402

              	 
      	
                59195

              	 
      	
                59195

              	 
      	
                76548

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                BUD

              	 
      	
                BUD

              	 
      	
                742054780000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                47484

              	 
      	
                59225

              	 
      	
                59225

              	 
      	
                76908

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                DICKENSON
      OLTON

              	 
      	
                DICKENSON
      OLTON

              	 
      	
                742054890000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                45927

              	 
      	
                59225

              	 
      	
                60709

              	 
      	
                76908B

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                DICKENSON
      OLTON B

              	 
      	
                DICKENSON
      OLTON B

              	 
      	
                742054900000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                44727

              	 
      	
                59225

              	 
      	
                60710

              	 
      	
                78908C

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                DICKENSON
      OLTON C

              	 
      	
                DICKENSON
      OLTON C

              	 
      	
                742054910000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                45990

              	 
      	
                56117

              	 
      	
                56117

              	 
      	
                75183

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                DORIS

              	 
      	
                DORIS

              	 
      	
                742054920000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                50512

              	 
      	
                55581

              	 
      	
                55581

              	 
      	
                75043

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                DRIVER
      A 1.2.3

              	 
      	
                DRIVER
      A 1.2,3

              	 
      	
                742054930000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                47375

              	 
      	
                59213

              	 
      	
                59213

              	 
      	
                76725

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                DUSEK

              	 
      	
                DUSEK

              	 
      	
                742054940000PITS

              	 
      	
                Upton

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                52862

              	 
      	
                55914

              	 
      	
                55914

              	 
      	
                75531

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES, USA, INC.

              	 
      	
                E T
      O'DANIEL #37

              	 
      	
                E T
      ODANIEL #37

              	 
      	
                742054960000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                50495

              	 
      	
                55995

              	 
      	
                55995

              	 
      	
                75038

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC,

              	 
      	
                EILAND
      A

              	 
      	
                EILAND
      A

              	 
      	
                742054970000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                50538

              	 
      	
                55582

              	 
      	
                55582

              	 
      	
                75044

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                GERMANIA
      DEAN TR 2

              	 
      	
                GERMANIA
      205 A DEAN

              	 
      	
                742054990205PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                50750

              	 
      	
                63382

              	 
      	
                63382

              	 
      	
                78055

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES, USA, INC.

              	 
      	
                GERMANIA
      DEAN TR 3

              	 
      	
                GERMANIA
      TRACT 3

              	 
      	
                742054990003PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                50751

              	 
      	
                55584

              	 
      	
                59821

              	 
      	
                75039

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES USA, INC

              	 
      	
                GERMANIA
      DEAN TR 4

              	 
      	
                GERMANIA
      TRACT 4

              	 
      	
                742054990004PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                50837

              	 
      	
                63383

              	 
      	
                63383

              	 
      	
                78056

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES USA. INC

              	 
      	
                GERMANIA
      DEAN TR 5

              	 
      	
                GERMANIA
      TRACT 5

              	 
      	
                742054990005PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                50677

              	 
      	
                55584

              	 
      	
                55584

              	 
      	
                75087

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES USA, INC

              	 
      	
                GERMANIA
      DEAN TR 6

              	 
      	
                GERMANIA
      TRACT 6 DEAN

              	 
      	
                742054890006PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                47967

              	 
      	
                59219

              	 
      	
                60840

              	 
      	
                76773B

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES USA. INC

              	 
      	
                GREATHOUSE

              	 
      	
                GREATHOUSE

              	 
      	
                742055010000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                47561

              	 
      	
                59219

              	 
      	
                59219

              	 
      	
                76773

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC

              	 
      	
                GREATHOUSE
      C

              	 
      	
                GREATHOUSE
      C

              	 
      	
                742055030000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                47488

              	 
      	
                56144

              	 
      	
                56144

              	 
      	
                75191

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC

              	 
      	
                HARVARDC

              	 
      	
                HARVARD
      C

              	 
      	
                742055050000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                46412

              	 
      	
                59196

              	 
      	
                78016

              	 
      	
                78549

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                IRENE

              	 
      	
                IRENE

              	 
      	
                742055060000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                47431

              	 
      	
                59002

              	 
      	
                59002

              	 
      	
                76723

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC

              	 
      	
                IRVIN
      UNIT

              	 
      	
                IRVIN
      UT

              	 
      	
                742055070000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                53258

              	 
      	
                55885

              	 
      	
                55885

              	 
      	
                75707

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                J W
      DRIVER #6

              	 
      	
                J W
      DRIVER #6

              	 
      	
                742055080000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                50479

              	 
      	
                56004

              	 
      	
                56004

              	 
      	
                75039

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                JUDKINS
      G 1. 2, 3

              	 
      	
                JUDKINS
      G 1.2, 3

              	 
      	
                742055120000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                54768

              	 
      	
                09796

              	 
      	
                09796

              	 
      	
                75196

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA. INC.

              	 
      	
                JULIETTE

              	 
      	
                JULIETTE

              	 
      	
                742055140000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                50862

              	 
      	
                56159

              	 
      	
                56159

              	 
      	
                75197

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                KELLY
      STEPHENS

              	 
      	
                KELLY
      STEPHENS

              	 
      	
                742055150000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                45522

              	 
      	
                73539

              	 
      	
                73539

              	 
      	
                76901B

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES- USA, INC.

              	 
      	
                LINDSEY

              	 
      	
                LINDSEY

              	 
      	
                742055160000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                47977

              	 
      	
                65505

              	 
      	
                65505

              	 
      	
                77804

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                MCBRENDA
      NO 1 UNIT

              	 
      	
                MCBRENDA
      NO 1 UT

              	 
      	
                742055180000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                46510

              	 
      	
                59461

              	 
      	
                59461

              	 
      	
                76702

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                MCMORRIES
      A

              	 
      	
                MCMORRIES
      A

              	 
      	
                742054700000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                51104

              	 
      	
                56379

              	 
      	
                56379

              	 
      	
                75458

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                MIDKIFF
      DEAN UNIT TRACT 21

              	 
      	
                MIDKIFF
      DEAN UT TRACT 21

              	 
      	
                742055190021PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                53400

              	 
      	
                56379

              	 
      	
                62752

              	 
      	
                75459

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                MIDKIFF
      DEAN UNIT TRACT 22A

              	 
      	
                MIDKIFF
      DEAN UT TRACT 22A

              	 
      	
                74205519022APITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                51256

              	 
      	
                56379

              	 
      	
                60730

              	 
      	
                75464

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                MIDKIFF
      DEAN UNIT TRACT 47

              	 
      	
                MIDKIFF
      DEAN UT TRACT 47

              	 
      	
                742055190047PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                51281

              	 
      	
                56379

              	 
      	
                60626

              	 
      	
                75465

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA. INC.

              	 
      	
                MIDKIFF
      DEAN UNIT TRACT 48

              	 
      	
                MIDKIFF
      DEAN UT TRACT 48

              	 
      	
                742055190048PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                51282

              	 
      	
                56379

              	 
      	
                60627

              	 
      	
                75466

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                MIDKIFF
      DEAN UNrT TRACT 61

              	 
      	
                MIDKIFF
      DEAN UT TRACT 61

              	 
      	
                742055190061PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                50713

              	 
      	
                56379

              	 
      	
                60626

              	 
      	
                75469

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                MIDKIFF
      DEAN UNIT TRACT 67

              	 
      	
                MIDKIFF
      DEAN UT TRACT 67

              	 
      	
                742055190067PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                50714

              	 
      	
                56379

              	 
      	
                60629

              	 
      	
                75470

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                MIDKIFF
      DEAN UNIT TRACT 68

              	 
      	
                MIDKIFF
      DEAN UT TRACT 68

              	 
      	
                742055190068PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0,53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                46969

              	 
      	
                60944

              	 
      	
                60944

              	 
      	
                77772

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                MO
      MAC A

              	 
      	
                MO
      MAC A

              	 
      	
                742055200000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                50056

              	 
      	
                65504

              	 
      	
                65504

              	 
      	
                77803

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                MO-MCB

              	 
      	
                MO-MCB

              	 
      	
                742055220000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                47590

              	 
      	
                59466

              	 
      	
                60737

              	 
      	
                76895

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                NEALF

              	 
      	
                NEALF

              	 
      	
                742055270000PITS

              	 
      	
                Upton

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                46764

              	 
      	
                59197

              	 
      	
                59197

              	 
      	
                76551

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                NEILL

              	 
      	
                NEILL

              	 
      	
                742055280000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                50386

              	 
      	
                56099

              	 
      	
                56099

              	 
      	
                75177

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA. INC

              	 
      	
                O'DANIEL
      C, D

              	 
      	
                ODANIEL
      C, D

              	 
      	
                742055320000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                50071

              	 
      	
                56095

              	 
      	
                56095

              	 
      	
                75175

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA. INC.

              	 
      	
                ORSON
      0

              	 
      	
                ORSON
      0

              	 
      	
                742055340000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                47485

              	 
      	
                56207

              	 
      	
                56207

              	 
      	
                75204

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                RAYFORD-MCALISTER

              	 
      	
                RAYFORD-MCALISTER

              	 
      	
                742055360000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                45944

              	 
      	
                56209

              	 
      	
                56209

              	 
      	
                75205

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                ROBERTSON

              	 
      	
                ROBERTSON

              	 
      	
                742055370000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                45701

              	 
      	
                56106

              	 
      	
                56106

              	 
      	
                75212

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                STIMSON-BURLEY
      J

              	 
      	
                STIMSON-BURLEY
      J

              	 
      	
                742055480000PrTS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                45702

              	 
      	
                56062

              	 
      	
                56062

              	 
      	
                75211

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                STIMSON-BURLEY
      K

              	 
      	
                STIMSON-BURLEY
      K

              	 
      	
                742055490000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                45703

              	 
      	
                56060

              	 
      	
                56060

              	 
      	
                75210

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                STIMSON-BURLEY
      L

              	 
      	
                STIMSON-BURLEY
      L

              	 
      	
                742055500000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                57042

              	 
      	
                56093

              	 
      	
                56093

              	 
      	
                75174

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                TXL
      G #1

              	 
      	
                TXLG#1

              	 
      	
                742055520000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                45926

              	 
      	
                56115

              	 
      	
                56115

              	 
      	
                75214

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES USA, INC

              	 
      	
                ULMER

              	 
      	
                ULMER

              	 
      	
                742055540000PITS

              	 
      	
                Upton

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                46941

              	 
      	
                59226

              	 
      	
                59226

              	 
      	
                78914

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES USA, INC.

              	 
      	
                WELCH
      E

              	 
      	
                WELCH
      E

              	 
      	
                742055560000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                50046

              	 
      	
                59226

              	 
      	
                60712

              	 
      	
                78914B

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                WELCH
      F

              	 
      	
                WELCH
      F

              	 
      	
                742055570000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                47577

              	 
      	
                54709

              	 
      	
                54709

              	 
      	
                73879B

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                WETSEL
      A

              	 
      	
                WETSEL
      A

              	 
      	
                742055580000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                44878

              	 
      	
                60973

              	 
      	
                60973

              	 
      	
                77919

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                WINDHAM
      D

              	 
      	
                WINDHAM
      D

              	 
      	
                742055590000PITS

              	 
      	
                Upton

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                45705

              	 
      	
                60973

              	 
      	
                87224

              	 
      	
                77919B

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA. INC.

              	 
      	
                WINDHAM
      E

              	 
      	
                WINDHAM
      E

              	 
      	
                742055600000PITS

              	 
      	
                Upton

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                46401

              	 
      	
                60942

              	 
      	
                60942

              	 
      	
                77787

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                WINDHAM
      F

              	 
      	
                WINDHAM
      F

              	 
      	
                742055610000PITS

              	 
      	
                Upton

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                46632

              	 
      	
                56061

              	 
      	
                56061

              	 
      	
                75160

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                WINDHAM
      G

              	 
      	
                WINDHAM
      G

              	 
      	
                742055620000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                0.53

              
	
                WTI

              	 
      	
                OET
      Trks

              	 
      	
                03/01/2004

              	 
      	
                50226

              	 
      	
                60928

              	 
      	
                80928

              	 
      	
                77228

              	 
      	
                
                  1.00000000

                

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES USA, INC.

              	 
      	
                WINDHAM
      S

              	 
      	
                WINDHAM
      S

              	 
      	
                742055640000PITS

              	 
      	
                Upton

              	 
      	
                TX

              	 
      	
                0.53

              

      

       

      
        
           

        

        
           

          
            

          

        

        
           

        

      

       

      
        	 	
                Occidental
      Energy Marketing, Inc.

              	
                5
      Greenway Plaza, Suite 110, Houston, Texas 77046-0521

                P.O.
      Box 27570, Houston, Texas 77227-7570

                Phone
      713.215.7000

              
	
                A
      subsidiary of Occidental Petroleum Corporation

              	 
      

      

       

      

       

      VIA FAX:
972-969-3574

       

      TO:                DEB
STEWART - PIONEER NATURAL RESOURCES USA, INC. - PHONE 972-969-3855 

      FROM:   
MARK HAFNER- OCCIDENTAL ENERGY
MARKETING, INC. - PHONE 432-685-5884

       

      REFERENCE:  
OCCIDENTAL CONTRACT NUMBER: 0403-PNR-13605-P

      PIONEER
NATURAL RESOURCES USA, INC. CONTRACT NUMBER:

       

      THIS FAX
CONFIRMS THE AGREEMENT BETWEEN DEB STEWART OF PIONEER NATURAL RESOURCES USA,
INC. AND MARK HAFNER OF OCCIDENTAL ENERGY MARKETING, INC. ON FEBRUARY 1, 2004.
THE FOLLOWING DETAILS ARE OCCIDENTAL'S UNDERSTANDING:

       

      SELLER:              
PIONEER NATURAL RESOURCES USA, INC. ("PIONEER")

      BUYER:               
 OCCIDENTAL ENERGY MARKETING, INC. ("OCCIDENTAL")

       

      
        	
              	
                1.  

              	
                VOLUME:    APPROXIMATELY 638 BARRELS PER DAY
      EXACT VOLUME EQUAL TO THE PRODUCTION FROM THE LEASES ON ATTACHED EXHIBIT
      "A"

              

      

       

      
        
          	
                	
                  2.

                	
                  QUALITY/GRADE:   WEST
      TEXAS INTERMEDIATE

                

        

      

       

      
        	
              	
                3.  

              	
                DELIVERY POINT:    TITLE
      AND RISK OF LOSS SHALL PASS FROM PIONEER TO OCCIDENTAL AS THE CRUDE OIL
      ENTERS THE FACILITIES OF OCCIDENTAL'S DESIGNATED
  TRUCKER.

              

      

       

      
        	
                 
      

              	
                4.

              	
                
                  TERM:   MARCH  1 - 31,
      2004 AND CONTINUING MONTH TO MONTH THEREAFTER
      SUBJECT TO A 30 DAY ADVANCE WRITTEN NOTICE OF CANCELLATION BY EITHER
      PARTY.

                

              

      

       

      
        	
                 
      

              	
                5.

              	
                
                  PRICE:   KOCH PETROLEUM GROUP L.P.
      MONTHLY EDQ POSTED PRICE FORWEST TEXAS/NEW MEXICO INTERMEDIATE DEEMED 40.0
      DEGREES FOR THE MONTH OF DELIVERY, PLUS THE AVERAGE OF THE *PLATTS DAILY
      ASSESSMENTS OF WTI-P PLUS LESS THE DIFFERENCE BETWEEN (PLATTS WTI-CUSHING
      LESS PLATTS WTI-MEDLAND) PLUS DELTA DOLLARS PER BARREL SET OUT ON EXHIBIT
      "A".

                

              

      

       

      * NOTE
ALL PLATTS PRICING IS FOR THE DELIVERY MONTH AS PUBLISHED BY PLATTS DURING THE
PERIOD BEGINNING ON THE 26TH OF THE SECOND MONTH PRECEEDING THE DELIVERY MONTH
AND ENDING ON THE 25TH OF THE MONTH PRECEEDING THE DELIVERY MONTH.

       

      
        	
                 
      

              	
                6.

              	
                
                  PAYMENT:   PAYMENT UNDER THIS CONTRACT
      SHALL BE MADE BY WIRE TRANSFER ON THE TWENTIETH (20TH) CALENDAR DAY OF THE
      MONTH FOLLOWING THE MONTH OF DELIVERY LESS APPLICABLE TAXES. IF THE
      PAYMENT DUE DATE FALLS ON A SATURDAY OR BANK HOLIDAY (EXCEPT MONDAY),
      PAYMENT WILL BE MADE ON THE PRECEDING BUSINESS DAY. IF PAYMENT DUE DATE
      FALLS ON A SUNDAY OR MONDAY HOLIDAY, PAYMENT WILL BE MADE ON THE FOLLOWING
      BUSINESS DAY. PAYMENT SHOULD BE MADE TO BANK OF AMERICA, FOR THE ACCOUNT
      OF PIONEER NATURAL RESOURCES USA, INC., ACCOUNT NO. XXXXXXXXXX, ABA NO.
      XXXXXXXXX.

                

              

      

       

      
        	
              	
                7.

              	
                COMMENTS AND SPECIAL
      PROVISIONS:CONOCO'S GENERAL TERMS AND CONDITIONS TO
      APPLY.

              

      

       

      

      
        	
                APPROVED
      BY:

              	
                /s/ john t.
      mcwhorter

              	 
      
	 
      	
                john t.
      mcwhorter

              	 
      
	 
      	
                occidental energy
      marketing, inc.

              	 
      
	 
      	 
      	 
      
	
                APPROVED
      BY:

              	
                /s/
      Hershal K. Wolfe

              	 
      
	 
      	
                pioneer
      natural resources usa, inc.

              	 
      

      

      

        
          
             

          

          
             

            
              

            

          

          
             

          

        

      

       

      EXHIBIT
"A"

       

      OEMI'S
Contract #0403-PNR-13605-P Contract# Allegro Contract #114659

      

       

      
        	
                Crude
      Type

              	 
      	
                Transporter

              	 
      	
                Start
      Date

              	 	
                Carrier 
      Lease to ID #

              	 
      	
                EMOCRC

              	 
      	
                RPC

              	 
      	
                DO

              	 
      	
                Decimal

              	 
      	
                Old
      XOM Contract #

              	 
      	
                Operator

              	 
      	
                Lease
      Name

              	 
      	
                OXY
      ALLEGO LEASE NAME

              	 
      	
                OXY
      Lease*

              	 
      	
                County

              	 
      	
                State

              	 
      	
                BID

              	 
      	
                Lease
      Delta

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                46451

              	 
      	
                56059

              	 
      	
                56059

              	 
      	
                75159

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                BIZZELLA

              	 
      	
                BIZZELLA

              	 
      	
                742054740000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                7

              	 
      	
                -0.53

              
	
                wn

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                46681

              	 
      	
                59211

              	 
      	
                78015

              	 
      	
                78706

              	 
      	
                1.00000000

              	 
      	
                B0I2D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                BIZZELLE
      B UNIT

              	 
      	
                BIZZELLE
      B UT

              	 
      	
                742054750000PrrS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                11

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                46290

              	 
      	
                59209

              	 
      	
                76014

              	 
      	
                76703

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                BIZZELLE
      UNrTf/1

              	 
      	
                BIZZELLE
      UT #1

              	 
      	
                742054760000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                5

              	 
      	
                -053

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                46990

              	 
      	
                59196

              	 
      	
                59198

              	 
      	
                76552

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                BONNE
      UNrT

              	 
      	
                BONNIE
      UT

              	 
      	
                742054770000PrTS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                7

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                46402

              	 
      	
                59195

              	 
      	
                59195

              	 
      	
                76548

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                BUD

              	 
      	
                BUD

              	 
      	
                742054780000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                6

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                47484

              	 
      	
                59225

              	 
      	
                59225

              	 
      	
                76908

              	 
      	
                1
      00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                DICKENSON
      OLTON

              	 
      	
                DICKENSON
      OLTON

              	 
      	
                742054890000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                1

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                45927

              	 
      	
                59225

              	 
      	
                60709

              	 
      	
                76908B

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                DICKENSON
      OLTON B

              	 
      	
                DICKENSON
      OLTON B

              	 
      	
                742054900000PrrS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                4

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                44727

              	 
      	
                59225

              	 
      	
                60710

              	 
      	
                76908C

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA. INC.

              	 
      	
                DICKENSON
      OLTON C

              	 
      	
                DICKENSON
      OLTON C

              	 
      	
                742054910000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                5

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                45990

              	 
      	
                56117

              	 
      	
                56117

              	 
      	
                75183

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                DORIS

              	 
      	
                DORIS

              	 
      	
                742054920000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                9

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                50512

              	 
      	
                55581

              	 
      	
                55581

              	 
      	
                75043

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                DRIVER
      A 1,2,3

              	 
      	
                DRIVER
      A 1,2,3

              	 
      	
                742054930000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                21

              	 
      	
                -053

              
	
                WTI

              	 
      	
                Genesis
      Trik

              	 
      	
                03/01/2004

              	 	
                47375

              	 
      	
                59213

              	 
      	
                59213

              	 
      	
                76725

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                DUSEK

              	 
      	
                DUSEK

              	 
      	
                742054940000PITS

              	 
      	
                Upton

              	 
      	
                TX

              	 
      	
                6

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                52862

              	 
      	
                55914

              	 
      	
                55914

              	 
      	
                75531

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                E T
      O'DANIEL #37

              	 
      	
                E T
      ODANEL #37

              	 
      	
                742054960000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                20

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                50495

              	 
      	
                55995

              	 
      	
                55995

              	 
      	
                75038

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                EILAND
      A

              	 
      	
                EILAND
      A

              	 
      	
                742054970000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                20

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                50538

              	 
      	
                55562

              	 
      	
                55582

              	 
      	
                75044

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA. INC.

              	 
      	
                GERMAN
      IA DEAN TR 2

              	 
      	
                GERMANIA
      205 A DEAN

              	 
      	
                742054990205PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                26

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                50750

              	 
      	
                63382

              	 
      	
                63382

              	 
      	
                78055

              	 
      	
                1.00000000

              	 
      	
                B0120

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                GERMAN
      IA DEAN TR 3

              	 
      	
                GERMANIA
      TRACT 3

              	 
      	
                742054990003PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                145

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                50751

              	 
      	
                55584

              	 
      	
                59821

              	 
      	
                75089

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                GERMAN
      IA DEAN TR 4

              	 
      	
                GERMANIA
      TRACT 4

              	 
      	
                742054990004PrTS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                26

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                50837

              	 
      	
                83383

              	 
      	
                63383

              	 
      	
                78056

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                GERMANIA
      DEANTR5

              	 
      	
                GERMANIA
      TRACT 5

              	 
      	
                742054990005PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                7

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                50677

              	 
      	
                55584

              	 
      	
                55584

              	 
      	
                75087

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                GERMAN
      IA DEAN TR 8

              	 
      	
                GERMANIA
      TRACT 6 DEAN

              	 
      	
                742054990006PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                8

              	 
      	
                �033

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                47967

              	 
      	
                59219

              	 
      	
                60S40

              	 
      	
                76773B

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                GREATHOUSE

              	 
      	
                GREATHOUSE

              	 
      	
                742055010000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                9

              	 
      	
                �053

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                47561

              	 
      	
                59219

              	 
      	
                59219

              	 
      	
                76773

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                GREATHOUSE
      C

              	 
      	
                GREATHOUSE
      C

              	 
      	
                742055030000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                1

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                47488

              	 
      	
                56144

              	 
      	
                56144

              	 
      	
                75191

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                HARVARDC

              	 
      	
                HARVARD
      C

              	 
      	
                742055050000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                4

              	 
      	
                -053

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                46412

              	 
      	
                59196

              	 
      	
                78016

              	 
      	
                76549

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                IRENE

              	 
      	
                IRENE

              	 
      	
                742055060000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                10

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                47431

              	 
      	
                59002

              	 
      	
                59002

              	 
      	
                76723

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                IRVIN
      UNIT

              	 
      	
                IRVIN
      UT

              	 
      	
                742055070000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                6

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                53258

              	 
      	
                55885

              	 
      	
                55885

              	 
      	
                75707

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                J W
      DRIVER #6

              	 
      	
                J W
      DRIVER #6

              	 
      	
                742055080000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                4

              	 
      	
                -0.53

              
	
                wn

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                53258

              	 
      	
                55615

              	 
      	
                55615

              	 
      	
                75695

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                J W
      DRIVER #7

              	 
      	
                J W
      DRIVER #7

              	 
      	
                742055090000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                4

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                50479

              	 
      	
                56004

              	 
      	
                56004

              	 
      	
                75039

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                JUDKINS
      G 1,2,3

              	 
      	
                JUDKINS
      G 1,2. 3

              	 
      	
                742055120000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                17

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                54766

              	 
      	
                09796

              	 
      	
                09796

              	 
      	
                75196

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                JULIETTE

              	 
      	
                JULIETTE

              	 
      	
                742055140000PITS

              	 
      	
                Mart*

              	 
      	
                TX

              	 
      	
                6

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                50862

              	 
      	
                56159

              	 
      	
                56159

              	 
      	
                75197

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                KELLY
      STEPHENS

              	 
      	
                KELLY
      STEPHENS

              	 
      	
                742055150000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                7

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                45522

              	 
      	
                73539

              	 
      	
                73539

              	 
      	
                76901B

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                LINDSEY

              	 
      	
                LINDSEY

              	 
      	
                742055160000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                5

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                47977

              	 
      	
                65505

              	 
      	
                65505

              	 
      	
                77804

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                MCBRENDA
      NO 1 UNrT

              	 
      	
                MCBRENDA
      NO 1 UT

              	 
      	
                742055180000PrTS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                10

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                46510

              	 
      	
                59461

              	 
      	
                59461

              	 
      	
                76702

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                MCMORRIES
      A

              	 
      	
                MCMORRES
      A

              	 
      	
                742054700000PrTS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                6

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                51104

              	 
      	
                56379

              	 
      	
                56379

              	 
      	
                75458

              	 
      	
                1.00000000

              	 
      	
                BC112D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                MIDKFF
      DEAN UNIT TRACT 21

              	 
      	
                MIOKFF
      DEAN UT TRACT 21

              	 
      	
                742055190021
      PrrS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                7

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                53400

              	 
      	
                56379

              	 
      	
                62752

              	 
      	
                75459

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                MIDKIFF
      DEAN UNIT TRACT 22A

              	 
      	
                MIDKIFF
      DEAN UT TRACT 22A

              	 
      	
                74205519022APITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                6

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                51256

              	 
      	
                56379

              	 
      	
                60730

              	 
      	
                75464

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                MIDKIFF
      DEAN UNIT TRACT 47

              	 
      	
                MIDKIFF
      DEAN UT TRACT 47

              	 
      	
                742055190047PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                13

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                51281

              	 
      	
                56379

              	 
      	
                60626

              	 
      	
                75465

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                MIDKIFF
      DEAN UNIT TRACT 48

              	 
      	
                MIDKFF
      DEAN UT TRACT 48

              	 
      	
                742055190048PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                6

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                51282

              	 
      	
                56379

              	 
      	
                60627

              	 
      	
                75466

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                MIDKFF
      DEAN UNIT TRACT 61

              	 
      	
                MIDKFF
      DEAN UT TRACT 61

              	 
      	
                7420S5190061PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                9

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                50713

              	 
      	
                56379

              	 
      	
                60628

              	 
      	
                75469

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                MIDKFF
      DEAN UNIT TRACT 67

              	 
      	
                MIDKFF
      DEAN UT TRACT 67

              	 
      	
                742055190067PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                7

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                50714

              	 
      	
                56379

              	 
      	
                60629

              	 
      	
                75470

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                MIDKFF
      DEAN UNrT TRACT 68

              	 
      	
                MIDKIFF
      DEAN UT TRACT 66

              	 
      	
                742055190068PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                6

              	 
      	
                -0.53

              
	
                wn

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                46969

              	 
      	
                60944

              	 
      	
                60944

              	 
      	
                77772

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                MO
      MAC A

              	 
      	
                MO
      MAC A

              	 
      	
                742055200000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                6

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                50056

              	 
      	
                65504

              	 
      	
                65504

              	 
      	
                77803

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                MO-MCB

              	 
      	
                MO-MCB

              	 
      	
                742055220000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                16

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                47590

              	 
      	
                59466

              	 
      	
                60737

              	 
      	
                76895

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                NEALF

              	 
      	
                NEALF

              	 
      	
                742055270000PITS

              	 
      	
                Upton

              	 
      	
                TX

              	 
      	
                3

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                46764

              	 
      	
                59197

              	 
      	
                59197

              	 
      	
                76551

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                NELL

              	 
      	
                NEILL

              	 
      	
                742055260000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                6

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                45991

              	 
      	
                56165

              	 
      	
                56165

              	 
      	
                75199

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                NELSON
      A

              	 
      	
                NELSON
      A

              	 
      	
                742055290000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                7

              	 
      	
                �0.53

              
	
                wn

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                46452

              	 
      	
                59210

              	 
      	
                59210

              	 
      	
                76704

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                ONEAL

              	 
      	
                ONEAL

              	 
      	
                74205531
      0000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                4

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                50386

              	 
      	
                56099

              	 
      	
                56099

              	 
      	
                75177

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                O'DANIEL
      C, D

              	 
      	
                ODANIELC,
      D

              	 
      	
                742055320000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                15

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                50071

              	 
      	
                56095

              	 
      	
                56095

              	 
      	
                75175

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                ORSON
      O

              	 
      	
                ORSON
      O

              	 
      	
                742055340000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                4

              	 
      	
                �053

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                50038

              	 
      	
                59472

              	 
      	
                60711

              	 
      	
                76610B

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                ORSONP

              	 
      	
                ORSONP

              	 
      	
                742055660000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                4

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                50039

              	 
      	
                59472

              	 
      	
                60711

              	 
      	
                76910

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                ORSON
      0

              	 
      	
                ORSON
      Q

              	 
      	
                742055670000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                3

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                47485

              	 
      	
                56207

              	 
      	
                56207

              	 
      	
                75204

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                RAYFORD-MCALISTER

              	 
      	
                RAYFORD-MCALISTER

              	 
      	
                742055360000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                6

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                45944

              	 
      	
                56209

              	 
      	
                56209

              	 
      	
                75205

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA. INC.

              	 
      	
                ROBERTSON

              	 
      	
                ROBERTSON

              	 
      	
                742055370000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                3

              	 
      	
                �0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                45701

              	 
      	
                56106

              	 
      	
                56106

              	 
      	
                75212

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                STIMSON-BURLEYJ

              	 
      	
                STIMSON-BURLEYJ

              	 
      	
                742055480000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                3

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                45702

              	 
      	
                56062

              	 
      	
                56062

              	 
      	
                75211

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                STIMSON-BURLEY
      K

              	 
      	
                STIMSON-BURLEY
      K

              	 
      	
                742055490000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                6

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                45703

              	 
      	
                56060

              	 
      	
                56060

              	 
      	
                75210

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                STIMSON-BURLEY
      L

              	 
      	
                STIMSON-BURLEY
      L

              	 
      	
                742055500000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                4

              	 
      	
                -053

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                57042

              	 
      	
                56093

              	 
      	
                56093

              	 
      	
                75174

              	 
      	
                1.00000000

              	 
      	
                B0120

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                TXLG#1

              	 
      	
                TXLG#1

              	 
      	
                742055520000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                9

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                45926

              	 
      	
                56115

              	 
      	
                56115

              	 
      	
                75214

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                ULMER

              	 
      	
                ULMER

              	 
      	
                742055540000PITS

              	 
      	
                Upton

              	 
      	
                TX

              	 
      	
                10

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                46941

              	 
      	
                59226

              	 
      	
                59226

              	 
      	
                76914

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA. INC.

              	 
      	
                WELCH
      E

              	 
      	
                WELCH
      E

              	 
      	
                74205S560000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                4

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                50046

              	 
      	
                59226

              	 
      	
                60712

              	 
      	
                76914B

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                WELCH
      F

              	 
      	
                WELCH
      F

              	 
      	
                742055570000PrrS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                3

              	 
      	
                -053

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                47577

              	 
      	
                54709

              	 
      	
                54709

              	 
      	
                73879B

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                WETSELA

              	 
      	
                WETSELA

              	 
      	
                7420S5580000PITS

              	 
      	
                Martin

              	 
      	
                TX

              	 
      	
                4

              	 
      	
                -053

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                44878

              	 
      	
                60973

              	 
      	
                60973

              	 
      	
                77919

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                WINDHAM
      D

              	 
      	
                WINDHAM
      D

              	 
      	
                742055590000PITS

              	 
      	
                Upton

              	 
      	
                TX

              	 
      	
                4

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                45705

              	 
      	
                60973

              	 
      	
                67224

              	 
      	
                77919B

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                WINDHAM
      E

              	 
      	
                WINDHAM
      E

              	 
      	
                742055600000PITS

              	 
      	
                Upton

              	 
      	
                TX

              	 
      	
                10

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                46401

              	 
      	
                60942

              	 
      	
                60942

              	 
      	
                77767

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                WINDHAM
      F

              	 
      	
                WINDHAM
      F

              	 
      	
                742055610000PrrS

              	 
      	
                Upton

              	 
      	
                TX

              	 
      	
                11

              	 
      	
                -0.53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                46632

              	 
      	
                56061

              	 
      	
                56061

              	 
      	
                75160

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA. INC.

              	 
      	
                WINDHAM
      G

              	 
      	
                WINDHAM
      G

              	 
      	
                742055620000PITS

              	 
      	
                Midland

              	 
      	
                TX

              	 
      	
                10

              	 
      	
                -0
      53

              
	
                WTI

              	 
      	
                Genesis
      Trks

              	 
      	
                03/01/2004

              	 	
                50226

              	 
      	
                60928

              	 
      	
                60928

              	 
      	
                77228

              	 
      	
                1.00000000

              	 
      	
                B012D

              	 
      	
                PIONEER
      NATURAL RES. USA, INC.

              	 
      	
                WINDHAM
      S

              	 
      	
                WINDHAM
      S

              	 
      	
                742055640000PITS

              	 
      	
                Upton

              	 
      	
                TX

              	 
      	
                6

              	 
      	
                -0.53

              
	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	 	638

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00169-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00169-of-00352.parquet"}]]