COWDEN

Oil · District 08 · Lease #35580

Operator: PIEDRA OPERATING, LLC

Fields: VENTEAM (ELLENBURGER)

Cum Oil

259k BBL

Cum Gas

204k MCF

casinghead

Wells

1

Production

1997-11 — 2026-04

Peak Month

1998-01

Production History

Cum Oil: 259,035 BBL Cum Gas: 204,054 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

2,735 BBL/mo

Di (annual)

19.3%

b-factor

0.5

EUR

281,558 BBL

R-squared

0.758

type

hyperbolic

Operator History (from monthly production reports)

2019-12 — 2026-07 OXY USA WTP LP 80 mo

2015-11 — 2019-11 PIEDRA OPERATING, LLC 49 mo

1999-10 — 2015-10 EOG RESOURCES, INC. 193 mo

1997-11 — 1999-09 ENRON OIL & GAS COMPANY 23 mo

Wells (1)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
301	42-003-38299	OXY USA WTP LP	2	13,500	1997-10-15