MARY K. SHIRK

Oil · District 7C · Lease #17651

Operator: OPAL RESOURCES OPERATING CO.,LLC

Fields: SPRABERRY (TREND AREA)

Cum Oil

74k BBL

Cum Gas

298k MCF

casinghead

Wells

2

Production

2011-08 — 2026-04

Peak Month

2013-09

Production History

Cum Oil: 73,935 BBL Cum Gas: 297,969 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

720 BBL/mo

Di (annual)

11.1%

b-factor

0.0

EUR

77,580 BBL

R-squared

0.388

type

exponential

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

2011-08 — 2013-01 OPAL RESOURCES OPERATING CO.,LLC 18 mo

Wells (2)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
8	42-461-38714	BCP RESOURCES, LLC	1	10,600	2013-04-08
5	42-461-36993	BCP RESOURCES, LLC	2	12,000	2011-08-16