PRIBYL

Oil · District 02 · Lease #7537

Operator: PETRA OLEUM CORP.

Fields: COLETTO CREEK (2760)

Cum Oil

40k BBL

Cum Gas

59k MCF

casinghead

Wells

1

Production

1993-01 — 2010-06

Peak Month

1993-03

Production History

Cum Oil: 39,871 BBL Cum Gas: 59,107 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

454 BBL/mo

Di (annual)

16.1%

b-factor

0.0

EUR

33,642 BBL

R-squared

0.652

type

exponential

Operator History (from monthly production reports)

1999-04 — 2012-12 PETRA OLEUM CORP. 165 mo

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

1996-06 — 1997-01 COSTILLA PETROLEUM CORPORATION 8 mo

1995-03 — 1996-05 PARKER & PARSLEY DEVELOPMENT L.P 15 mo

1993-11 — 1995-02 MIDPAR L.P. 16 mo

1993-01 — 1993-10 GRAHAM ROYALTY, LTD. 10 mo

Wells (1)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
9	42-469-03087	PETRA OLEUM CORP.	2	2,920	2010-07-09