SHANKLES, J. M.

Oil · District 09 · Lease #28450

Operator: WHITE MARLIN OPERATING CO, LLC

Fields: PERRIN, N. AFB (BAKER SD)

Cum Oil

99k BBL

Cum Gas

146k MCF

casinghead

Wells

1

Production

1993-01 — 2026-04

Peak Month

1997-04

Production History

Cum Oil: 98,705 BBL Cum Gas: 146,071 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

349 BBL/mo

Di (annual)

3.5%

b-factor

0.7

EUR

115,433 BBL

R-squared

0.413

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

2014-10 — 2018-03 ARROW ROCK ENERGY, LLC 42 mo

2007-07 — 2014-09 SAMSON LONE STAR, LLC 87 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
1	42-181-31012	BKM PRODUCTION	2	12,625	1992-11-16