POWELL "11"

Oil · District 08 · Lease #33508

Operator: VANGUARD PERMIAN, LLC

Fields: COBRA (WOLFCAMP)

Cum Oil

360k BBL

Cum Gas

638k MCF

casinghead

Wells

2

Production

1993-01 — 2018-03

Peak Month

1993-01

Production History

Cum Oil: 360,319 BBL Cum Gas: 637,515 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

11,084 BBL/mo

Di (annual)

51.2%

b-factor

0.2

EUR

324,258 BBL

R-squared

0.919

type

hyperbolic

Operator History (from monthly production reports)

2017-07 — 2020-11 OXY USA INC. 41 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

1993-01 — 1998-03 TREND EXPLORATION COMPANY 63 mo

Wells (2)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
13	42-173-32201	OXY USA INC.	2	8,400	1992-02-26
13D	42-173-32201	OXY USA INC.	2	8,400	1992-02-26