SHAFFER, W. S. -B-

Oil · District 7B · Lease #11127

Operator: TCS PETROLEUM CO., LLC

Cum Oil

111k BBL

Cum Gas

276 MCF

casinghead

Wells

6

Production

1993-01 — 2026-04

Peak Month

1993-03

Production History

Cum Oil: 111,018 BBL Cum Gas: 276 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

979 BBL/mo

Di (annual)

12.8%

b-factor

0.0

EUR

91,632 BBL

R-squared

0.477

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 (6)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
6PRESLEY PROD INVESTMENTS, LLC12,9202021-07-23
1PRESLEY PROD INVESTMENTS, LLC12,9022021-04-30
9PRESLEY PROD INVESTMENTS, LLC12,9901977-06-20
342-441-30150PRESLEY PROD INVESTMENTS, LLC------
442-441-30166PRESLEY PROD INVESTMENTS, LLC------
542-441-30180PRESLEY PROD INVESTMENTS, LLC------