COOPER "B" 35

Oil · District 08 · Lease #34461

Operator: VANGUARD PERMIAN, LLC

Fields: COBRA (WOLFCAMP)

Cum Oil

185k BBL

Cum Gas

431k MCF

casinghead

Wells

1

Production

1995-04 — 2017-12

Peak Month

1995-05

Production History

Cum Oil: 185,030 BBL Cum Gas: 431,431 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

5,056 BBL/mo

Di (annual)

211.2%

b-factor

0.8

EUR

96,474 BBL

R-squared

0.651

type

hyperbolic

Operator History (from monthly production reports)

2017-07 — 2025-07 OXY USA INC. 97 mo

2015-05 — 2017-06 VANGUARD OPERATING, LLC 26 mo

2013-04 — 2015-04 VANGUARD PERMIAN, LLC 25 mo

1998-09 — 2013-03 RANGE PRODUCTION COMPANY 175 mo

1998-04 — 1998-08 LOMAK PRODUCTION COMPANY 5 mo

1995-04 — 1998-03 TREND EXPLORATION COMPANY 36 mo

Wells (1)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
1	42-173-32498	OXY USA INC.	1	8,600	1995-03-07