PRESTON SPRABERRY UNIT

Oil · District 08 · Lease #18551

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

17.8M BBL

Cum Gas

54.3M MCF

casinghead

Wells

391

Production

1993-01 — 2026-02

Peak Month

2005-03

Production History

Cum Oil: 17,843,145 BBL Cum Gas: 54,323,017 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

103,681 BBL/mo

Di (annual)

7.1%

b-factor

0.0

EUR

16,998,000 BBL

R-squared

0.874

type

exponential

Operator History (from monthly production reports)

1997-09 — 2026-07 PIONEER NATURAL RES. USA, INC. 347 mo
1995-03 — 1997-08 PARKER & PARSLEY DEVELOPMENT L.P 30 mo
1993-01 — 1995-02 PARKER & PARSLEY DEVELOPMENT CO. 26 mo

Wells (391)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
901HPIONEER NATURAL RES. USA, INC.18,5182021-09-16
902HPIONEER NATURAL RES. USA, INC.18,5182021-09-16
27PIONEER NATURAL RES. USA, INC.210,3002015-07-22
12PIONEER NATURAL RES. USA, INC.19,0002015-06-03
3450HPIONEER NATURAL RES. USA, INC.28,6732014-08-20
3451HPIONEER NATURAL RES. USA, INC.28,6732014-08-20
4102DPIONEER NATURAL RES. USA, INC.14,8502014-05-09
1702HPIONEER NATURAL RES. USA, INC.211,5002013-09-16
1701HPIONEER NATURAL RES. USA, INC.18,3902013-07-26
4180APIONEER NATURAL RES. USA, INC.19,1752008-08-28
4022APIONEER NATURAL RES. USA, INC.19,1752008-08-19
4020APIONEER NATURAL RES. USA, INC.19,1752008-08-14
4021APIONEER NATURAL RES. USA, INC.19,1752008-08-14
4179APIONEER NATURAL RES. USA, INC.19,1752008-08-14
3116APIONEER NATURAL RES. USA, INC.19,3752008-07-22
3117APIONEER NATURAL RES. USA, INC.19,3752008-07-22
3118APIONEER NATURAL RES. USA, INC.19,3752008-07-22
4102 APIONEER NATURAL RES. USA, INC.18,8002005-04-06
2612APIONEER NATURAL RES. USA, INC.29,0002005-02-28
3431APIONEER NATURAL RES. USA, INC.19,0002005-02-28
4177 APIONEER NATURAL RES. USA, INC.18,8002005-02-28
2101APIONEER NATURAL RES. USA, INC.18,9002003-07-24
1702APIONEER NATURAL RES. USA, INC.19,0502003-07-23
3430APIONEER NATURAL RES. USA, INC.19,0502003-06-27
4019APIONEER NATURAL RES. USA, INC.18,7502003-06-11
4175APIONEER NATURAL RES. USA, INC.18,7502003-06-05
4172APIONEER NATURAL RES. USA, INC.18,7502003-06-04
4173APIONEER NATURAL RES. USA, INC.18,8002003-06-04
3317APIONEER NATURAL RES. USA, INC.18,9502003-01-27
3315APIONEER NATURAL RES. USA, INC.18,9502003-01-24
3316APIONEER NATURAL RES. USA, INC.18,9002003-01-24
2122APIONEER NATURAL RES. USA, INC.18,9002003-01-23
2504APIONEER NATURAL RES. USA, INC.19,0002003-01-23
2610APIONEER NATURAL RES. USA, INC.19,0502003-01-22
1504APIONEER NATURAL RES. USA, INC.19,0002003-01-02
1808APIONEER NATURAL RES. USA, INC.19,0502003-01-02
1910APIONEER NATURAL RES. USA, INC.18,9502002-08-09
4169APIONEER NATURAL RES. USA, INC.18,9402002-08-09
4170APIONEER NATURAL RES. USA, INC.18,9002002-08-09
4171APIONEER NATURAL RES. USA, INC.19,1002002-08-09
4511APIONEER NATURAL RES. USA, INC.18,9402002-08-09
2120APIONEER NATURAL RES. USA, INC.19,0702002-08-07
2121APIONEER NATURAL RES. USA, INC.19,0002002-08-07
3918APIONEER NATURAL RES. USA, INC.19,0302002-08-02
1710APIONEER NATURAL RES. USA, INC.19,2102002-07-08
1711APIONEER NATURAL RES. USA, INC.19,1302002-07-08
3429APIONEER NATURAL RES. USA, INC.19,1002002-07-08
4317APIONEER NATURAL RES. USA, INC.19,0001998-04-09
3427APIONEER NATURAL RES. USA, INC.19,1001998-03-24
3428APIONEER NATURAL RES. USA, INC.19,1001998-03-24
4316APIONEER NATURAL RES. USA, INC.19,0001998-03-24
4202PIONEER NATURAL RES. USA, INC.18,9001998-03-12
1302PIONEER NATURAL RES. USA, INC.19,0001998-03-11
1302APIONEER NATURAL RES. USA, INC.19,0001998-03-11
3105PIONEER NATURAL RES. USA, INC.29,0001998-03-11
3105APIONEER NATURAL RES. USA, INC.29,0001998-03-11
2119APIONEER NATURAL RES. USA, INC.18,9001998-03-04
3205APIONEER NATURAL RES. USA, INC.18,9001998-03-04
4168APIONEER NATURAL RES. USA, INC.18,8001998-03-04
2404APIONEER NATURAL RES. USA, INC.19,0001998-03-03
2704APIONEER NATURAL RES. USA, INC.19,0001998-03-03
2805APIONEER NATURAL RES. USA, INC.18,8001998-02-23
4018APIONEER NATURAL RES. USA, INC.18,8001998-02-23
2304APIONEER NATURAL RES. USA, INC.19,0001998-02-20
3917APIONEER NATURAL RES. USA, INC.19,0001998-02-20
4220APIONEER NATURAL RES. USA, INC.19,0001998-02-20
1807APIONEER NATURAL RES. USA, INC.19,2001998-01-28
1909APIONEER NATURAL RES. USA, INC.18,8501998-01-23
4605APIONEER NATURAL RES. USA, INC.18,9501998-01-23
4164APIONEER NATURAL RES. USA, INC.18,9001998-01-21
4165APIONEER NATURAL RES. USA, INC.18,9001998-01-21
4166APIONEER NATURAL RES. USA, INC.18,8001998-01-07
3115APIONEER NATURAL RES. USA, INC.18,9001997-12-17
3821APIONEER NATURAL RES. USA, INC.19,0001997-12-17
3822APIONEER NATURAL RES. USA, INC.19,0001997-12-17
3916APIONEER NATURAL RES. USA, INC.18,9501997-12-17
3004APIONEER NATURAL RES. USA, INC.18,9001997-12-15
4163APIONEER NATURAL RES. USA, INC.28,9001997-12-15
4017APIONEER NATURAL RES. USA, INC.18,7401997-08-14
2303APIONEER NATURAL RES. USA, INC.18,9901997-07-22
4315APIONEER NATURAL RES. USA, INC.18,9351997-07-16
3314APIONEER NATURAL RES. USA, INC.18,9401997-07-15
708PIONEER NATURAL RES. USA, INC.18,2751997-07-15
2910PIONEER NATURAL RES. USA, INC.18,3801997-07-14
4160APIONEER NATURAL RES. USA, INC.18,7801997-07-14
101PIONEER NATURAL RES. USA, INC.18,3001997-07-10
1608APIONEER NATURAL RES. USA, INC.19,0001997-07-10
202PIONEER NATURAL RES. USA, INC.18,2751997-07-10
2117APIONEER NATURAL RES. USA, INC.18,9501997-07-07
3426APIONEER NATURAL RES. USA, INC.18,9751997-07-07
4413APIONEER NATURAL RES. USA, INC.19,0001997-06-25
4414APIONEER NATURAL RES. USA, INC.19,0001997-06-25
3425APIONEER NATURAL RES. USA, INC.19,0201997-05-23
3424APIONEER NATURAL RES. USA, INC.18,9001997-05-22
4159APIONEER NATURAL RES. USA, INC.18,8001997-05-22
3423APIONEER NATURAL RES. USA, INC.18,9101997-05-21
4158APIONEER NATURAL RES. USA, INC.18,7801997-05-20
2116APIONEER NATURAL RES. USA, INC.19,0001997-05-12
4411APIONEER NATURAL RES. USA, INC.18,9801997-05-05
4412APIONEER NATURAL RES. USA, INC.18,9501997-05-05
3915APIONEER NATURAL RES. USA, INC.18,9101997-04-28
2804APIONEER NATURAL RES. USA, INC.18,7701997-04-22
2909APIONEER NATURAL RES. USA, INC.19,0001997-04-17
1503APIONEER NATURAL RES. USA, INC.18,9501997-04-15
1606APIONEER NATURAL RES. USA, INC.18,9301997-04-15
1607APIONEER NATURAL RES. USA, INC.19,0001997-04-15
1908APIONEER NATURAL RES. USA, INC.28,9101997-04-15
3710APIONEER NATURAL RES. USA, INC.18,9201997-04-08
4510BPIONEER NATURAL RES. USA, INC.29,5001997-02-10
2009APIONEER NATURAL RES. USA, INC.18,8901996-09-25
2908APIONEER NATURAL RES. USA, INC.28,8001996-09-17
4219APIONEER NATURAL RES. USA, INC.18,8101996-09-09
4013APIONEER NATURAL RES. USA, INC.28,8101996-09-06
3820PIONEER NATURAL RES. USA, INC.28,8201996-08-29
3113APIONEER NATURAL RES. USA, INC.18,9401996-08-15
3422APIONEER NATURAL RES. USA, INC.18,9351996-08-08
3313APIONEER NATURAL RES. USA, INC.19,0351996-07-29
3114-APIONEER NATURAL RES. USA, INC.18,8851996-07-25
1204 APIONEER NATURAL RES. USA, INC.19,0001996-07-12
3312APIONEER NATURAL RES. USA, INC.18,9751994-12-05
3003APIONEER NATURAL RES. USA, INC.18,8001994-11-18
1806APIONEER NATURAL RES. USA, INC.19,0251994-11-02
4156APIONEER NATURAL RES. USA, INC.18,8251994-09-21
4217APIONEER NATURAL RES. USA, INC.18,8001994-09-21
1709APIONEER NATURAL RES. USA, INC.19,0001994-05-06
1104APIONEER NATURAL RES. USA, INC.18,9001994-04-28
2609APIONEER NATURAL RES. USA, INC.19,0501994-04-26
2703APIONEER NATURAL RES. USA, INC.19,0501994-04-26
4312APIONEER NATURAL RES. USA, INC.18,8501994-04-26
1408APIONEER NATURAL RES. USA, INC.18,9251994-04-20
3417APIONEER NATURAL RES. USA, INC.19,0001993-08-12
4508APIONEER NATURAL RES. USA, INC.18,9001993-08-12
2608APIONEER NATURAL RES. USA, INC.19,0251993-08-11
4146APIONEER NATURAL RES. USA, INC.18,8281993-08-10
4409APIONEER NATURAL RES. USA, INC.19,0501993-08-10
2203APIONEER NATURAL RES. USA, INC.19,0001993-08-02
3420APIONEER NATURAL RES. USA, INC.19,0001993-08-02
2113APIONEER NATURAL RES. USA, INC.19,0001993-07-22
2113AQPIONEER NATURAL RES. USA, INC.19,0001993-07-22
1805APIONEER NATURAL RES. USA, INC.29,0251993-07-08
3419APIONEER NATURAL RES. USA, INC.18,9501993-07-08
1804APIONEER NATURAL RES. USA, INC.19,0251993-07-07
3418APIONEER NATURAL RES. USA, INC.19,0001993-07-07
2606APIONEER NATURAL RES. USA, INC.19,0251993-07-02
4311APIONEER NATURAL RES. USA, INC.18,8751993-06-03
4408APIONEER NATURAL RES. USA, INC.18,9751993-06-03
2403APIONEER NATURAL RES. USA, INC.29,0001993-06-02
3416APIONEER NATURAL RES. USA, INC.18,9751993-06-02
2607APIONEER NATURAL RES. USA, INC.19,0001993-06-01
4144APIONEER NATURAL RES. USA, INC.18,7751993-06-01
4012APIONEER NATURAL RES. USA, INC.18,7501993-05-17
4145APIONEER NATURAL RES. USA, INC.18,8001993-05-14
1803APIONEER NATURAL RES. USA, INC.19,0001993-04-30
3309APIONEER NATURAL RES. USA, INC.18,9751993-03-10
1103APIONEER NATURAL RES. USA, INC.18,9001993-03-09
2007APIONEER NATURAL RES. USA, INC.18,8751993-03-09
4143APIONEER NATURAL RES. USA, INC.18,8001993-03-09
2503APIONEER NATURAL RES. USA, INC.19,0001993-03-08
2702APIONEER NATURAL RES. USA, INC.19,0501993-02-24
3415APIONEER NATURAL RES. USA, INC.18,9501993-02-24
4011APIONEER NATURAL RES. USA, INC.28,8001993-02-24
1605APIONEER NATURAL RES. USA, INC.19,0001993-02-23
1707APIONEER NATURAL RES. USA, INC.19,0001993-02-23
1708APIONEER NATURAL RES. USA, INC.19,0001993-02-23
1717APIONEER NATURAL RES. USA, INC.19,0001993-02-23
2907APIONEER NATURAL RES. USA, INC.18,8501993-02-23
1704APIONEER NATURAL RES. USA, INC.19,0001992-12-04
2605APIONEER NATURAL RES. USA, INC.19,0501992-12-04
4010APIONEER NATURAL RES. USA, INC.18,7501992-12-04
2402APIONEER NATURAL RES. USA, INC.18,9501992-12-02
4142APIONEER NATURAL RES. USA, INC.18,8001992-12-01
3412APIONEER NATURAL RES. USA, INC.19,0001992-11-20
1705APIONEER NATURAL RES. USA, INC.19,0001992-11-17
1706APIONEER NATURAL RES. USA, INC.19,0001992-11-17
2604APIONEER NATURAL RES. USA, INC.19,0001992-11-17
3002APIONEER NATURAL RES. USA, INC.19,1001992-11-16
3308APIONEER NATURAL RES. USA, INC.18,9501992-11-16
4141APIONEER NATURAL RES. USA, INC.18,7501992-11-16
4407APIONEER NATURAL RES. USA, INC.19,0001992-11-16
2906APIONEER NATURAL RES. USA, INC.19,1001992-11-03
3307APIONEER NATURAL RES. USA, INC.18,9501992-11-03
3413APIONEER NATURAL RES. USA, INC.18,9501992-11-03
3414APIONEER NATURAL RES. USA, INC.18,9501992-11-03
4140APIONEER NATURAL RES. USA, INC.18,7501992-11-03
4139APIONEER NATURAL RES. USA, INC.18,7501992-10-23
1502APIONEER NATURAL RES. USA, INC.18,9501992-10-22
2803APIONEER NATURAL RES. USA, INC.18,9751992-08-28
4008APIONEER NATURAL RES. USA, INC.18,7501992-08-28
4009APIONEER NATURAL RES. USA, INC.18,7501992-08-28
4137APIONEER NATURAL RES. USA, INC.18,7501992-08-13
4138APIONEER NATURAL RES. USA, INC.18,7751992-08-13
4309APIONEER NATURAL RES. USA, INC.18,8501992-08-13
4310APIONEER NATURAL RES. USA, INC.18,8501992-08-13
4507APIONEER NATURAL RES. USA, INC.18,7751992-08-13
3109APIONEER NATURAL RES. USA, INC.28,8501992-08-12
4134APIONEER NATURAL RES. USA, INC.18,7501992-08-12
3910APIONEER NATURAL RES. USA, INC.28,8751992-08-11
4135APIONEER NATURAL RES. USA, INC.18,7501992-08-11
4136APIONEER NATURAL RES. USA, INC.18,7751992-08-11
3909APIONEER NATURAL RES. USA, INC.18,8751992-08-10
4213APIONEER NATURAL RES. USA, INC.29,1001992-08-06
3908APIONEER NATURAL RES. USA, INC.19,1001992-08-05
3911APIONEER NATURAL RES. USA, INC.18,8751992-08-05
4212APIONEER NATURAL RES. USA, INC.19,1001992-08-04
2006APIONEER NATURAL RES. USA, INC.18,8001992-07-17
2112APIONEER NATURAL RES. USA, INC.18,9501992-07-17
3411APIONEER NATURAL RES. USA, INC.18,9501992-07-17
2202APIONEER NATURAL RES. USA, INC.18,9501992-07-14
2502APIONEER NATURAL RES. USA, INC.28,9501992-07-14
3815APIONEER NATURAL RES. USA, INC.29,1001992-07-14
3845APIONEER NATURAL RES. USA, INC.29,1001992-07-14
4131APIONEER NATURAL RES. USA, INC.18,7501992-07-14
4132APIONEER NATURAL RES. USA, INC.18,7501992-07-14
1407APIONEER NATURAL RES. USA, INC.18,9501992-07-06
3814APIONEER NATURAL RES. USA, INC.29,1001992-07-06
4133APIONEER NATURAL RES. USA, INC.18,7501992-07-06
1406APIONEER NATURAL RES. USA, INC.18,9501992-07-03
3410PIONEER NATURAL RES. USA, INC.29,2001990-11-28
30PIONEER NATURAL RES. USA, INC.19,0001989-10-23
4155BPIONEER NATURAL RES. USA, INC.19,0001989-10-23
3914BPIONEER NATURAL RES. USA, INC.19,0001989-10-06
2118BPIONEER NATURAL RES. USA, INC.19,2001987-06-18
3310BPIONEER NATURAL RES. USA, INC.110,2001987-06-18
3311BPIONEER NATURAL RES. USA, INC.110,2001987-06-18
6PIONEER NATURAL RES. USA, INC.110,2001987-06-18
2008BPIONEER NATURAL RES. USA, INC.19,2001987-06-10
38PIONEER NATURAL RES. USA, INC.19,1501987-02-13
3819BPIONEER NATURAL RES. USA, INC.19,1501987-02-13
4509BPIONEER NATURAL RES. USA, INC.110,2001987-01-29
29PIONEER NATURAL RES. USA, INC.110,7001987-01-13
4154BPIONEER NATURAL RES. USA, INC.110,7001987-01-13
2302BPIONEER NATURAL RES. USA, INC.110,2001987-01-02
2114BPIONEER NATURAL RES. USA, INC.110,2001986-12-31
2144BPIONEER NATURAL RES. USA, INC.110,2001986-12-31
2115BPIONEER NATURAL RES. USA, INC.110,0001986-09-29
3112BPIONEER NATURAL RES. USA, INC.110,2001986-09-29
3913BPIONEER NATURAL RES. USA, INC.19,5001986-06-18
4314BPIONEER NATURAL RES. USA, INC.19,5001986-06-18
26PIONEER NATURAL RES. USA, INC.19,5001986-06-17
4152BPIONEER NATURAL RES. USA, INC.19,5001986-06-17
4153BPIONEER NATURAL RES. USA, INC.19,5001986-06-17
3110BPIONEER NATURAL RES. USA, INC.19,3001986-02-18
3111BPIONEER NATURAL RES. USA, INC.19,3001986-02-18
3421BPIONEER NATURAL RES. USA, INC.19,2001985-11-18
3912BPIONEER NATURAL RES. USA, INC.19,2001985-11-01
4313BPIONEER NATURAL RES. USA, INC.19,2001985-11-01
4215BPIONEER NATURAL RES. USA, INC.19,2001985-10-31
4216BPIONEER NATURAL RES. USA, INC.19,2001985-10-31
4410BPIONEER NATURAL RES. USA, INC.19,2001985-10-29
3708BPIONEER NATURAL RES. USA, INC.19,2001985-10-25
25PIONEER NATURAL RES. USA, INC.19,2001985-10-18
4150BPIONEER NATURAL RES. USA, INC.19,2001985-10-18
4151BPIONEER NATURAL RES. USA, INC.19,2001985-10-18
3709BPIONEER NATURAL RES. USA, INC.19,2001985-06-12
3818BPIONEER NATURAL RES. USA, INC.19,2001985-06-04
22PIONEER NATURAL RES. USA, INC.19,2001985-05-16
23PIONEER NATURAL RES. USA, INC.19,2001985-05-16
3817BPIONEER NATURAL RES. USA, INC.19,2001985-05-16
4149BPIONEER NATURAL RES. USA, INC.19,2001985-05-16
4162BPIONEER NATURAL RES. USA, INC.19,2001985-05-16
20PIONEER NATURAL RES. USA, INC.111,8001984-12-27
4147BPIONEER NATURAL RES. USA, INC.111,8001984-12-27
4148BPIONEER NATURAL RES. USA, INC.19,2001984-12-27
4214BPIONEER NATURAL RES. USA, INC.112,4001984-08-28
2PIONEER NATURAL RES. USA, INC.19,0001984-07-25
4015BPIONEER NATURAL RES. USA, INC.19,0001984-07-25
4014BPIONEER NATURAL RES. USA, INC.29,2001983-12-29
2905PIONEER NATURAL RES. USA, INC.18,0001981-05-08
1907PIONEER NATURAL RES. USA, INC.18,0001981-04-27
2108PIONEER NATURAL RES. USA, INC.18,1001979-10-16
2004PIONEER NATURAL RES. USA, INC.18,1001979-02-20
100142-329-01751PIONEER NATURAL RES. USA, INC.------
10WS42-329-80883PIONEER NATURAL RES. USA, INC.------
110142-329-00118PIONEER NATURAL RES. USA, INC.------
11WS42-329-80911PIONEER NATURAL RES. USA, INC.------
120242-329-00339PIONEER NATURAL RES. USA, INC.------
120342-329-00348PIONEER NATURAL RES. USA, INC.------
12WS42-329-80884PIONEER NATURAL RES. USA, INC.------
130142-329-01581PIONEER NATURAL RES. USA, INC.------
130342-329-01557PIONEER NATURAL RES. USA, INC.------
130442-329-01638PIONEER NATURAL RES. USA, INC.------
13WS42-329-80885PIONEER NATURAL RES. USA, INC.------
140142-329-01065PIONEER NATURAL RES. USA, INC.------
140242-329-01073PIONEER NATURAL RES. USA, INC.------
140342-329-01083PIONEER NATURAL RES. USA, INC.------
140542-329-00993PIONEER NATURAL RES. USA, INC.------
14WS42-329-80912PIONEER NATURAL RES. USA, INC.------
150142-329-01664PIONEER NATURAL RES. USA, INC.------
15WS42-329-80886PIONEER NATURAL RES. USA, INC.------
1601D42-329-01761PIONEER NATURAL RES. USA, INC.------
1601W42-329-01761PIONEER NATURAL RES. USA, INC.------
160342-329-01757PIONEER NATURAL RES. USA, INC.------
16WS42-329-80887PIONEER NATURAL RES. USA, INC.------
1742-329-00863PIONEER NATURAL RES. USA, INC.------
17WS42-329-80888PIONEER NATURAL RES. USA, INC.------
180242-329-00125PIONEER NATURAL RES. USA, INC.------
18WS42-329-80906PIONEER NATURAL RES. USA, INC.------
190442-329-00350PIONEER NATURAL RES. USA, INC.------
1WS42-329-80879PIONEER NATURAL RES. USA, INC.------
2001W42-329-01064PIONEER NATURAL RES. USA, INC.------
200342-329-01082PIONEER NATURAL RES. USA, INC.------
20WS42-329-80890PIONEER NATURAL RES. USA, INC.------
210142-329-01177PIONEER NATURAL RES. USA, INC.------
210242-329-01168PIONEER NATURAL RES. USA, INC.------
210342-329-01172PIONEER NATURAL RES. USA, INC.------
210442-329-01173PIONEER NATURAL RES. USA, INC.------
220142-329-01178PIONEER NATURAL RES. USA, INC.------
230142-329-01181PIONEER NATURAL RES. USA, INC.------
250142-329-00512PIONEER NATURAL RES. USA, INC.------
260242-329-00444PIONEER NATURAL RES. USA, INC.------
2701W42-329-00852PIONEER NATURAL RES. USA, INC.------
2801W42-329-00882PIONEER NATURAL RES. USA, INC.------
290342-329-00097PIONEER NATURAL RES. USA, INC.------
2903D42-329-00097PIONEER NATURAL RES. USA, INC.------
290442-329-00094PIONEER NATURAL RES. USA, INC.------
2WS42-329-80907PIONEER NATURAL RES. USA, INC.------
300142-329-00144PIONEER NATURAL RES. USA, INC.------
304W42-329-01886PIONEER NATURAL RES. USA, INC.------
310242-329-01075PIONEER NATURAL RES. USA, INC.------
310442-329-00990PIONEER NATURAL RES. USA, INC.------
320142-329-01511PIONEER NATURAL RES. USA, INC.------
330142-329-01180PIONEER NATURAL RES. USA, INC.------
330242-329-01169PIONEER NATURAL RES. USA, INC.------
330342-329-01171PIONEER NATURAL RES. USA, INC.------
330442-329-01174PIONEER NATURAL RES. USA, INC.------
340142-329-00943PIONEER NATURAL RES. USA, INC.------
340242-329-00944PIONEER NATURAL RES. USA, INC.------
340342-329-00945PIONEER NATURAL RES. USA, INC.------
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