SIMPSON-MANN "C"

Oil · District 7C · Lease #12217

Operator: LAWRENCE, C. F. & ASSOC. INC.

Fields: ATKINSON, W. (SAN ANGELO)

Cum Oil

811 BBL

Cum Gas

32 MCF

casinghead

Wells

1

Production

1993-01 — 2026-04

Peak Month

1993-01

Production History

Cum Oil: 811 BBL Cum Gas: 32 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

23 BBL/mo

Di (annual)

8.0%

b-factor

0.0

EUR

3,289 BBL

R-squared

0.544

type

exponential

Operator History (from monthly production reports)

2021-06 — 2026-07 CORE PETRO, LLC 62 mo

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

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

1993-01 — 1994-07 LAWRENCE, C. F. & ASSOC. INC. 19 mo

Wells (1)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
11	42-451-31772	CORE PETRO, LLC	1	1,250	1987-04-27