SHAFFER, W. S. -C-

Oil · District 7B · Lease #11495

Operator: TCS PETROLEUM CO., LLC

Fields: TAYLOR COUNTY REGULAR

Cum Oil

65k BBL

Cum Gas

231 MCF

casinghead

Wells

3

Production

1993-01 — 2026-04

Peak Month

2021-12

Production History

Cum Oil: 64,964 BBL Cum Gas: 231 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

583 BBL/mo

Di (annual)

37.2%

b-factor

0.0

EUR

18,754 BBL

R-squared

0.460

type

exponential

Operator History (from monthly production reports)

2020-08 — 2026-07 PRESLEY PROD INVESTMENTS, LLC 72 mo

2019-05 — 2020-07 TCS PETROLEUM CO., LLC 15 mo

2018-05 — 2019-04 OGOG OPERATING, LLC 12 mo

2017-11 — 2018-04 MOSAIC EXPLORATION OPERATING LLC 6 mo

2015-10 — 2017-10 OGOG OPERATING, LLC 25 mo

2010-06 — 2015-09 BARON ENERGY INC. 64 mo

2007-08 — 2010-05 PERMIAN LEGEND LLC 34 mo

2006-04 — 2007-07 GREASEWOOD OPERATING, LTD. 16 mo

2001-02 — 2006-03 GREASEWOOD OIL COMPANY 62 mo

1993-01 — 2001-01 KORMAN EXPLORATION, INC. 97 mo

Wells (3)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
2	42-441-30297	PRESLEY PROD INVESTMENTS, LLC	1	2,950	2020-08-25
2RE	42-441-30297	PRESLEY PROD INVESTMENTS, LLC	1	2,950	2020-08-25
1	42-441-30235	PRESLEY PROD INVESTMENTS, LLC	--	--	--

SHAFFER, W. S. -C-

Production HistoryBeta Production data is a work in progress — still being validated against RRC filings. Spot something off or have questions? [email protected]

Decline Curve Analysis

Operator History (from monthly production reports)

Wells (3)

Production History