RUTHERFORD, W. Z.

Oil · District 7B · Lease #4289

Operator: PETRA OLEUM CORP.

Cum Oil

13k BBL

Cum Gas

12k MCF

casinghead

Wells

5

Production

1993-01 — 2000-12

Peak Month

1993-03

Production History

Cum Oil: 12,855 BBL Cum Gas: 11,779 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

327 BBL/mo

Di (annual)

30.7%

b-factor

0.1

EUR

14,117 BBL

R-squared

0.889

type

hyperbolic

Operator History (from monthly production reports)

1997-05 — 2008-03 PETRA OLEUM CORP. 131 mo
1997-02 — 1997-04 COSTILLA ENERGY, INC. 3 mo
1993-01 — 1997-01 COSTILLA PETROLEUM CORPORATION 49 mo

Wells (5)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3PETRA OLEUM CORP.14,4272015-01-09
5PETRA OLEUM CORP.14,4751989-02-23
142-433-00225PETRA OLEUM CORP.------
242-433-00226PETRA OLEUM CORP.------
442-433-00228PETRA OLEUM CORP.------