DORA ROBERTS RANCH UNIT

Oil · District 10 · Lease #15873

Operator: OXY USA INC.

Cum Oil

24k BBL

Cum Gas

0 MCF

Wells

20

Production

1993-01 — 1996-09

Peak Month

1994-11

Production History

Cum Oil: 24,165 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

1,153 BBL/mo

Di (annual)

60.2%

b-factor

2.0

EUR

156,782 BBL

R-squared

0.434

type

hyperbolic

Wells (20)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2201 COXY USA WTP LP112,5002016-09-02
1004OXY USA WTP LP213,1932002-12-12
1701OXY USA INC.113,2181997-07-22
1514OXY USA INC.213,2921995-02-13
2801OXY USA INC.212,6951994-04-04
1602OXY USA INC.113,2091993-03-09
906OXY USA INC.112,2971991-07-24
1605CITIES SERVICE OIL & GAS CORP.113,2301985-12-09
2213CITIES SERVICE OIL & GAS CORP.110,7501984-09-20
1612CITIES SERVICE OIL & GAS CORP.112,2651984-06-21
2107CITIES SERVICE OIL & GAS CORP.110,7751984-04-13
2205CITIES SERVICE OIL & GAS CORP.113,3001984-02-10
1005 C42-329-00403--------
1512 C42-329-00422--------
1609 C42-329-00438--------
1614 C42-329-00394--------
200142-329-00409--------
2103 C42-329-00423--------
210442-329-00193--------
2105 C42-329-00431--------
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