< leases

KEYSTONE/KEYSTONE RANCH

Oil · District 01 · Lease #13870

Operator: PENROD OIL COMPANY OF TEXAS, INC

Fields: PEARSALL (AUSTIN CHALK)

Cum Oil

42k BBL

Cum Gas

27k MCF

casinghead

Wells

3

Production

1994-06 — 2014-08

Peak Month

2000-08

Production History

Cum Oil: 42,360 BBL Cum Gas: 27,049 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,201 BBL/mo

Di (annual)

53.0%

b-factor

0.0

EUR

27,181 BBL

R-squared

0.487

type

exponential

Operator History (from monthly production reports)

2013-09 — 2026-07 OILFIELD CLEANTECH WATER REC LLC 155 mo
1996-03 — 2013-08 LIGHT RESOURCES 210 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 (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
242-163-31680OILFIELD CLEANTECH WATER REC LLC26,8502013-10-26
442-163-31740ORYX ENERGY COMPANY26,9002000-04-20
142-163-31787ORYX ENERGY COMPANY16,9501980-05-27