PAISANO RANCH -13-

Oil · District 01 · Lease #14151

Operator: PETRA OLEUM CORP.

Cum Oil

2k BBL

Cum Gas

37k MCF

casinghead

Wells

1

Production

1997-09 — 2002-05

Peak Month

1999-07

Production History

Cum Oil: 2,224 BBL Cum Gas: 36,535 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

140 BBL/mo

Di (annual)

735.6%

b-factor

2.0

EUR

5,966 BBL

R-squared

0.415

type

hyperbolic

Operator History (from monthly production reports)

1999-04 — 2002-08 PETRA OLEUM CORP. 41 mo
1997-09 — 1999-03 COSTILLA ENERGY, INC. 19 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1PETRA OLEUM CORP.112,0001997-04-21