SHIELDS UNIT

Oil · District 7B · Lease #26775

Operator: SHIDLER, MARK L., INC.

Fields: NANN (CANYON REEF)

Cum Oil

54k BBL

Cum Gas

25k MCF

casinghead

Wells

1

Production

1993-01 — 2010-11

Peak Month

1993-12

Production History

Cum Oil: 54,039 BBL Cum Gas: 25,397 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

945 BBL/mo

Di (annual)

67.1%

b-factor

0.9

EUR

53,714 BBL

R-squared

0.352

type

hyperbolic

Operator History (from monthly production reports)

2014-01 — 2026-07 RWJ OPERATING LLC 151 mo

2004-12 — 2013-12 SHIDLER, MARK L., INC. 109 mo

1999-09 — 2004-11 OKLAHOMA EA II, L.L.C. 63 mo

1996-08 — 1999-08 ANADARKO MINERALS, INC. 37 mo

1993-01 — 1996-07 HALE OIL & GAS PROPERTIES 43 mo

Wells (1)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
1	42-253-34031	RWJ OPERATING LLC	1	4,999	1992-12-02