< leases

SHINER RANCH

Oil · District 01 · Lease #12693

Operator: UNION PACIFIC AUSTIN CHALK CO.

Fields: PEARSALL (AUSTIN CHALK)

Cum Oil

871k BBL

Cum Gas

387k MCF

casinghead

Wells

8

Production

1993-01 — 2024-07

Peak Month

1993-02

Production History

Cum Oil: 871,440 BBL Cum Gas: 387,031 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

19,567 BBL/mo

Di (annual)

26.0%

b-factor

0.0

EUR

901,469 BBL

R-squared

0.795

type

exponential

Operator History (from monthly production reports)

2012-05 — 2026-07 BLACKBRUSH O & G, LLC 171 mo
2005-02 — 2012-04 BLACKBRUSH O & G, INC. 87 mo
2001-08 — 2005-01 TRIUMPH PETROLEUM COMPANY,L.L.C. 42 mo
2001-06 — 2001-07 ARCADIA EXPL. & PROD. COMPANY 2 mo
1999-04 — 2001-05 PETRA OLEUM CORP. 26 mo
1997-02 — 1999-03 COSTILLA ENERGY, INC. 26 mo
1997-01 — 1997-01 COSTILLA PETROLEUM CORPORATION 1 mo
1995-05 — 1996-12 UNION PACIFIC AUSTIN CHALK CO. 20 mo
1993-01 — 1995-04 GEMINI EXPLORATION COMPANY 28 mo

Wells (8)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
842-163-33121BLACKBRUSH O & G, LLC28,0002008-06-10
542-163-33105BLACKBRUSH O & G, LLC38,2002008-06-04
642-163-33115BLACKBRUSH O & G LLC48,2002005-12-29
742-163-33134BLACKBRUSH O & G LLC17,5001992-09-16
342-163-33093BLACKBRUSH O & G LLC17,6001991-08-09
242-163-32976BLACKBRUSH O & G LLC47,7001991-01-10
442-163-32975BLACKBRUSH O & G LLC17,6501991-01-10
142-163-32725BLACKBRUSH O & G LLC28,0001990-05-10