GUINN "A"

Oil · District 7C · Lease #9223

Operator: TCS PETROLEUM CO., LLC

Fields: ATKINSON, W. (SAN ANGELO)

Cum Oil

18k BBL

Cum Gas

36 MCF

casinghead

Wells

1

Production

1993-01 — 2026-04

Peak Month

1995-04

Production History

Cum Oil: 18,359 BBL Cum Gas: 36 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

224 BBL/mo

Di (annual)

15.4%

b-factor

0.0

EUR

17,364 BBL

R-squared

0.792

type

exponential

Operator History (from monthly production reports)

2025-09 — 2026-07 CORE PETRO, LLC 11 mo

2022-05 — 2025-08 TCS PETROLEUM CO., LLC 40 mo

2021-06 — 2022-04 CORE PETRO, LLC 11 mo

1996-03 — 2021-05 ARMOR PETROLEUM, INC. 303 mo

1994-08 — 1996-02 EARNEST PRODUCING CORPORATION 19 mo

1994-03 — 1994-07 LAWRENCE, C. F. & ASSOC. INC. 5 mo

1993-09 — 1994-02 SWARTZ OIL COMPANY 6 mo

1993-01 — 1993-08 SWARTZ, GUY A. 8 mo

Wells (1)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
1	42-451-30801	CORE PETRO, LLC	1	1,200	1981-07-27