LAMMERTS -A-

Oil · District 01 · Lease #13331

Operator: VIOLA PROD., INC.

Fields: PEARSALL (AUSTIN CHALK)

Cum Oil

22k BBL

Cum Gas

21k MCF

casinghead

Wells

1

Production

1993-01 — 2008-09

Peak Month

1993-03

Production History

Cum Oil: 22,360 BBL Cum Gas: 21,230 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

557 BBL/mo

Di (annual)

43.2%

b-factor

0.0

EUR

15,428 BBL

R-squared

0.654

type

exponential

Operator History (from monthly production reports)

2014-11 — 2018-02 CHESAPEAKE OPERATING, L.L.C. 40 mo

2010-02 — 2014-10 CHESAPEAKE OPERATING, INC. 57 mo

2009-07 — 2010-01 STONEGATE PRODUCTION COMPANY,LLC 7 mo

2008-06 — 2009-06 TRIUS OPERATIONS, LLC 13 mo

2007-10 — 2008-05 STRATCO OPERATING CO., INC. 8 mo

2005-03 — 2007-09 JENEX PETROLEUM CORPORATION 31 mo

2005-01 — 2005-02 MID TEXAS NATURAL GAS 2 mo

2003-10 — 2004-12 TIZA ENERGY, INC. 15 mo

1997-04 — 2003-09 NEWTON CORP.,THE 78 mo

1994-10 — 1997-03 VIOLA PROD., INC. 30 mo

1993-01 — 1994-09 CHESAPEAKE OPERATING, INC. 21 mo

Wells (1)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
2	42-283-31439	CHESAPEAKE OPERATING L.L.C.	1	10,300	1991-05-08

LAMMERTS -A-

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 (1)

Production History