WITCHER, J. E. -7-

Oil · District 08 · Lease #1558

Operator: OCCIDENTAL PERMIAN LTD.

Fields: FOSTER

Cum Oil

514k BBL

Cum Gas

125k MCF

casinghead

Wells

15

Production

1993-01 — 2026-03

Peak Month

2002-01

Production History

Cum Oil: 513,654 BBL Cum Gas: 125,223 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

6,795 BBL/mo

Di (annual)

19.9%

b-factor

0.2

EUR

504,830 BBL

R-squared

0.844

type

hyperbolic

Operator History (from monthly production reports)

2000-05 — 2026-07 OCCIDENTAL PERMIAN LTD. 315 mo
1997-03 — 2000-04 ALTURA ENERGY LTD. 38 mo
1993-01 — 1997-02 AMOCO PRODUCTION COMPANY 50 mo

Wells (15)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
16OCCIDENTAL PERMIAN LTD.14,6002011-06-24
10OCCIDENTAL PERMIAN LTD.14,6002001-08-30
11OCCIDENTAL PERMIAN LTD.14,6002001-08-30
12OCCIDENTAL PERMIAN LTD.14,6002001-08-30
13OCCIDENTAL PERMIAN LTD.14,6002001-08-30
14OCCIDENTAL PERMIAN LTD.24,6002001-08-30
15OCCIDENTAL PERMIAN LTD.14,6002001-08-30
8OCCIDENTAL PERMIAN LTD.14,6002001-08-30
9OCCIDENTAL PERMIAN LTD.14,6002001-08-30
6OCCIDENTAL PERMIAN LTD.14,2151987-05-12
142-135-06825OCCIDENTAL PERMIAN LTD.------
2W42-135-06823OCCIDENTAL PERMIAN LTD.------
4W42-135-06827OCCIDENTAL PERMIAN LTD.------
542-135-06828OCCIDENTAL PERMIAN LTD.------
C 2W42-135-08981OCCIDENTAL PERMIAN LTD.------