GARY, J. B. EST. ETAL -B-

Oil · District 03 · Lease #550

Operator: YORK E & P, LLC

Fields: BOLING, SOUTH

Cum Oil

231k BBL

Cum Gas

11k MCF

casinghead

Wells

3

Production

1993-01 — 2025-03

Peak Month

1998-05

Production History

Cum Oil: 230,524 BBL Cum Gas: 11,119 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

2,459 BBL/mo

Di (annual)

19.9%

b-factor

0.1

EUR

164,817 BBL

R-squared

0.668

type

hyperbolic

Operator History (from monthly production reports)

2021-08 — 2026-07 YORK E & P, LLC 60 mo

2019-08 — 2021-07 VICEROY PETROLEUM, LP 24 mo

2016-09 — 2019-07 HILCORP ENERGY COMPANY 35 mo

2012-02 — 2016-08 SAMSON EXPLORATION, LLC 55 mo

2007-07 — 2012-01 SAMSON LONE STAR, LLC 55 mo

1998-11 — 2007-06 SAMSON LONE STAR LP 104 mo

1997-09 — 1998-10 WAGNER, DUER & CO. 14 mo

1993-01 — 1997-08 HALBOUTY, MICHEL T. 56 mo

Wells (3)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
3	42-481-34021	YORK E & P LLC	1	7,000	1998-02-12
1	42-481-00639	YORK E & P LLC	--	--	--
2D	42-481-00668	YORK E & P LLC	--	--	--