SANFORD GRAY

Oil · District 08 · Lease #37728

Operator: THREE RIVERS OPERATING CO LLC

Fields: DOUBLE "L" (WOLFCAMP)

Cum Oil

525 BBL

Cum Gas

10k MCF

casinghead

Wells

1

Production

2003-12 — 2010-02

Peak Month

2004-01

Production History

Cum Oil: 525 BBL Cum Gas: 10,397 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

77 BBL/mo

Di (annual)

171.2%

b-factor

0.4

EUR

834 BBL

R-squared

0.483

type

hyperbolic

Operator History (from monthly production reports)

2012-08 — 2015-03 COG OPERATING LLC 32 mo

2010-04 — 2012-07 THREE RIVERS OPERATING CO LLC 28 mo

2004-03 — 2010-03 CHESAPEAKE OPERATING, INC. 72 mo

2003-12 — 2004-02 PERMIAN RESOURCES, INC. 3 mo

Wells (1)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
3	42-371-37304	COG OPERATING LLC	2	5,220	2003-07-09