KOUNTZE & COUCH -A-

Oil · District 03 · Lease #12921

Operator: VALLEY GATHERING COMPANY

Fields: LOUISE, SOUTH (FRIO 5450)

Cum Oil

33k BBL

Cum Gas

32k MCF

casinghead

Wells

1

Production

1993-01 — 2003-10

Peak Month

1993-01

Production History

Cum Oil: 32,803 BBL Cum Gas: 32,117 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

324 BBL/mo

Di (annual)

8.0%

b-factor

0.0

EUR

47,891 BBL

R-squared

0.353

type

exponential

Operator History (from monthly production reports)

1999-04 — 2005-03 PETRA OLEUM CORP. 72 mo

1997-02 — 1999-03 COSTILLA ENERGY, INC. 26 mo

1995-12 — 1997-01 COSTILLA PETROLEUM CORPORATION 14 mo

1995-06 — 1995-11 VALLEY GATHERING COMPANY 6 mo

1995-03 — 1995-05 PARKER & PARSLEY DEVELOPMENT L.P 3 mo

1993-01 — 1995-02 PARKER & PARSLEY DEVELOPMENT CO. 26 mo

Wells (1)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
4	42-481-31934	PETRA OLEUM CORP.	2	5,605	1980-04-18