SIBLEY, EFFIE POTTS -B-

Oil · District 08 · Lease #25500

Operator: SHELL WESTERN E&P

Fields: COYANOSA, N. (DELAWARE)

Cum Oil

174k BBL

Cum Gas

382k MCF

casinghead

Wells

6

Production

1993-01 — 2026-04

Peak Month

1996-10

Production History

Cum Oil: 173,855 BBL Cum Gas: 382,217 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,055 BBL/mo

Di (annual)

8.4%

b-factor

0.0

EUR

148,452 BBL

R-squared

0.732

type

exponential

Operator History (from monthly production reports)

2022-02 — 2026-07 P.O.&G. OPERATING, LLC 54 mo

2021-07 — 2022-01 MECO IV HOLDCO, LLC 7 mo

2015-09 — 2021-06 MECO IV, LLC 70 mo

2012-10 — 2015-08 SHELL WESTERN E&P 35 mo

2005-01 — 2012-09 CHESAPEAKE OPERATING, INC. 93 mo

2002-11 — 2004-12 PECOS PRODUCTION COMPANY 26 mo

1993-01 — 2002-10 MOBIL PRODUCING TX. & N.M. INC. 118 mo

Wells (6)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
8	42-371-33617	P.O.&G. OPERATING, LLC	1	5,500	1981-10-28
7	42-371-33394	P.O.&G. OPERATING, LLC	1	5,500	1981-04-08
6	42-371-33173	P.O.&G. OPERATING, LLC	1	5,500	1980-07-25
4	42-371-33125	P.O.&G. OPERATING, LLC	1	5,500	1980-06-13
5	42-371-33126	P.O.&G. OPERATING, LLC	1	5,500	1980-06-13
3	42-371-32759	P.O.&G. OPERATING, LLC	1	6,000	1979-05-01