POWELL "4B"

Oil · District 08 · Lease #33970

Operator: VANGUARD PERMIAN, LLC

Fields: COBRA (WOLFCAMP)

Cum Oil

253k BBL

Cum Gas

592k MCF

casinghead

Wells

1

Production

1993-09 — 2015-04

Peak Month

1994-04

Production History

Cum Oil: 252,767 BBL Cum Gas: 592,247 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

10,310 BBL/mo

Di (annual)

56.8%

b-factor

0.2

EUR

271,962 BBL

R-squared

0.883

type

hyperbolic

Operator History (from monthly production reports)

2017-07 — 2020-07 OXY USA INC. 37 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

1993-09 — 1998-03 TREND EXPLORATION COMPANY 55 mo

Wells (1)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
33D	42-173-32350	OXY USA INC.	2	8,500	1993-08-27