DORA ROBERTS RANCH UNIT

Oil · District 10 · Lease #34642

Operator: OXY USA WTP LP

Cum Oil

271k BBL

Cum Gas

0 MCF

Wells

14

Production

1995-10 — 2012-07

Peak Month

2009-05

Production History

Cum Oil: 271,102 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

8,033 BBL/mo

Di (annual)

23.8%

b-factor

0.0

EUR

404,544 BBL

R-squared

0.338

type

exponential

Wells (14)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4508OXY USA WTP LP211,0002011-04-01
4612OXY USA WTP LP111,0002008-12-29
4402OXY USA WTP LP111,0002008-08-09
4401OXY USA WTP LP310,5002008-04-26
4507OXY USA WTP LP111,0002008-04-26
4006OXY USA WTP LP110,5002008-02-25
4504OXY USA WTP LP113,1682007-08-29
4506OXY USA WTP LP413,3182007-02-10
4610OXY USA INC.212,9002000-07-05
4602OXY USA INC.19,7501997-08-25
4501 COXY USA INC.112,3981995-01-26
4001OXY USA INC.113,3221994-04-04
4002 C42-329-00388--------
450242-329-00417--------
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