SHINER RANCH

Oil · District 01 · Lease #13057

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

Fields: PEARSALL (AUSTIN CHALK)

Cum Oil

168k BBL

Cum Gas

110k MCF

casinghead

Wells

1

Production

1993-01 — 2006-04

Peak Month

1993-06

Production History

Cum Oil: 168,173 BBL Cum Gas: 110,101 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

4,645 BBL/mo

Di (annual)

47.4%

b-factor

0.4

EUR

190,302 BBL

R-squared

0.696

type

hyperbolic

Operator History (from monthly production reports)

2012-05 — 2016-08 BLACKBRUSH O & G, LLC 52 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 (1)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
208	42-163-32955	BLACKBRUSH O & G LLC	4	13,200	2005-12-19