POWELL "85"

Oil · District 7C · Lease #11803

Operator: ENDEAVOR ENERGY RESOURCES L.P.

Fields: SPRABERRY (TREND AREA)

Cum Oil

42k BBL

Cum Gas

145k MCF

casinghead

Wells

1

Production

1993-01 — 2025-10

Peak Month

1993-03

Production History

Cum Oil: 41,557 BBL Cum Gas: 144,845 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

221 BBL/mo

Di (annual)

6.7%

b-factor

0.0

EUR

38,266 BBL

R-squared

0.731

type

exponential

Operator History (from monthly production reports)

2020-11 — 2026-07 COG OPERATING LLC 69 mo

2004-03 — 2020-10 ENDEAVOR ENERGY RESOURCES L.P. 200 mo

1999-08 — 2004-02 BRECK OPERATING CORP. 55 mo

1998-01 — 1999-07 CONCHO RESOURCES INC. 19 mo

1997-02 — 1997-12 COSTILLA ENERGY, INC. 11 mo

1993-01 — 1997-01 COSTILLA PETROLEUM CORPORATION 49 mo

Wells (1)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
1	42-461-32503	COG OPERATING LLC	1	9,200	1985-11-05