SHANKLES, D. L. #2

Oil · District 09 · Lease #24545

Operator: WHITE MARLIN OPERATING CO, LLC

Fields: GRACE-MAG (PENN CORDELL)

Cum Oil

9k BBL

Cum Gas

82k MCF

casinghead

Wells

1

Production

1993-01 — 2006-03

Peak Month

1996-12

Production History

Cum Oil: 8,917 BBL Cum Gas: 82,129 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

489 BBL/mo

Di (annual)

434.2%

b-factor

1.1

EUR

8,738 BBL

R-squared

0.481

type

hyperbolic

Operator History (from monthly production reports)

2018-09 — 2026-07 BKM PRODUCTION 95 mo

2018-04 — 2018-08 WHITE MARLIN OPERATING CO, LLC 5 mo

2015-01 — 2018-03 ARROW ROCK ENERGY, LLC 39 mo

2007-07 — 2014-12 SAMSON LONE STAR, LLC 90 mo

1996-08 — 2007-06 SAMSON LONE STAR LP 131 mo

1995-04 — 1996-07 SAMSON HYDROCARBONS COMPANY 16 mo

1993-04 — 1995-03 SAMSON RESOURCES COMPANY 24 mo

1993-01 — 1993-03 GEODYNE OPERATING COMPANY 3 mo

Wells (1)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
2	42-181-31046	BKM PRODUCTION	3	12,000	2008-09-26