LOCKHART BANK OIL UNIT #3

Oil · District 03 · Lease #16117

Operator: SHERIDAN ENERGY,INC.

Fields: ALVIN, SOUTH (#39)

Cum Oil

230k BBL

Cum Gas

338k MCF

casinghead

Wells

2

Production

1993-01 — 2014-05

Peak Month

1998-06

Production History

Cum Oil: 229,682 BBL Cum Gas: 337,644 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

2,386 BBL/mo

Di (annual)

11.7%

b-factor

0.0

EUR

244,608 BBL

R-squared

0.657

type

exponential

Operator History (from monthly production reports)

2014-09 — 2026-07 HOCKLEY ENERGY, INC. 143 mo

2013-11 — 2014-08 DRILLMAR ENERGY, INC. 10 mo

2011-09 — 2013-10 CASKIDS OPERATING COMPANY 26 mo

2008-02 — 2011-08 DRILLMAR OPERATING COMPANY 43 mo

2003-11 — 2008-01 CORNERSTONE ENERGY, INC. 51 mo

2002-08 — 2003-10 CALPINE NATURAL GAS L.P. 15 mo

2002-05 — 2002-07 CALPINE NATURAL GAS COMPANY L.P. 3 mo

2000-03 — 2002-04 CALPINE NATURAL GAS COMPANY 26 mo

1997-12 — 2000-02 SHERIDAN ENERGY,INC. 27 mo

1997-11 — 1997-11 PIONEER RESOURCES PRODUCING, L.P 1 mo

1995-02 — 1997-10 PARKER & PARSLEY PRODUCING L.P. 33 mo

1994-10 — 1995-01 PARKER & PARSLEY DEVELOPMENT L.P 4 mo

1993-01 — 1994-09 BRIDGE OIL COMPANY, L. P. 21 mo

Wells (2)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
1	42-039-31826	DRILLMAR ENERGY, INC.	6	12,500	2002-11-01
2	42-039-01172	DRILLMAR ENERGY, INC.	4	11,191	1983-12-05

LOCKHART BANK OIL UNIT #3

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 (2)

Production History