SHINER RANCH -A-

Oil · District 01 · Lease #4702

Operator: TRIUMPH PETROLEUM COMPANY,L.L.C.

Fields: PEARSALL (AUSTIN CHALK)

Cum Oil

46k BBL

Cum Gas

32 MCF

casinghead

Wells

3

Production

1993-01 — 2006-10

Peak Month

1993-04

Production History

Cum Oil: 46,403 BBL Cum Gas: 32 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

666 BBL/mo

Di (annual)

21.3%

b-factor

0.2

EUR

46,461 BBL

R-squared

0.604

type

hyperbolic

Operator History (from monthly production reports)

2012-05 — 2021-09 BLACKBRUSH O & G, LLC 113 mo

2005-02 — 2012-04 BLACKBRUSH O & G, INC. 87 mo

2002-08 — 2005-01 TRIUMPH PETROLEUM COMPANY,L.L.C. 30 mo

2002-01 — 2002-07 HEC PETROLEUM, INC. 7 mo

1998-11 — 2001-12 HALLWOOD PETROLEUM, INC. 38 mo

1994-12 — 1998-10 ARCADIA EXPL. & PROD. COMPANY 47 mo

1993-01 — 1994-11 HINTON PRODUCTION COMPANY 23 mo

Wells (3)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
A 3	42-163-32872	BLACKBRUSH O & G LLC	1	9,532	1990-10-05
1	42-163-30280	BLACKBRUSH O & G LLC	--	--	--
2	42-163-30518	BLACKBRUSH O & G LLC	--	--	--