MARY K. SHIRK

Oil · District 7C · Lease #17939

Operator: OPAL RESOURCES OPERATING CO.,LLC

Fields: SHEEP MOUNTAIN (CONSOLIDATED)

Cum Oil

51k BBL

Cum Gas

188k MCF

casinghead

Wells

2

Production

2012-06 — 2025-12

Peak Month

2012-08

Production History

Cum Oil: 50,956 BBL Cum Gas: 188,182 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

817 BBL/mo

Di (annual)

24.3%

b-factor

0.1

EUR

44,660 BBL

R-squared

0.408

type

hyperbolic

Operator History (from monthly production reports)

2022-10 — 2026-07 BCP RESOURCES, LLC 46 mo

2018-02 — 2022-09 CAMBRIAN MANAGEMENT, LTD. 56 mo

2013-02 — 2018-01 HUNT OIL COMPANY 60 mo

2012-06 — 2013-01 OPAL RESOURCES OPERATING CO.,LLC 8 mo

Wells (2)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
7	42-461-37666	BCP RESOURCES LLC	2	13,000	2011-09-27
6	42-461-37554	BCP RESOURCES LLC	2	13,000	2011-07-25