KEYSTONE "A"

Oil · District 01 · Lease #13872

Operator: PENROD OIL COMPANY OF TEXAS, INC

Cum Oil

16k BBL

Cum Gas

134k MCF

casinghead

Wells

4

Production

1994-06 — 1998-10

Peak Month

1997-01

Production History

Cum Oil: 15,935 BBL Cum Gas: 133,820 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

757 BBL/mo

Di (annual)

97.5%

b-factor

0.2

EUR

11,600 BBL

R-squared

0.633

type

hyperbolic

Operator History (from monthly production reports)

1996-03 — 1999-01 LIGHT RESOURCES 35 mo
1995-03 — 1996-02 GINCO OPERATING CO. 12 mo
1994-11 — 1995-02 PEARSALL ENERGY GROUP, INC. 4 mo
1994-10 — 1994-10 MOBILE PRODUCTION SYSTEMS, INC. 1 mo
1994-06 — 1994-09 PENROD OIL COMPANY OF TEXAS, INC 4 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
5LIGHT RESOURCES16,9001978-10-03
4OILFIELD CLEANTECH WATER REC LLC26,9001978-06-20
3AOILFIELD CLEANTECH WATER REC LLC16,9501977-10-31
1LIGHT RESOURCES16,8001977-07-08