ZIMMER, JOHN

Oil · District 02 · Lease #4505

Operator: PETRA OLEUM CORP.

Cum Oil

346k BBL

Cum Gas

81k MCF

casinghead

Wells

8

Production

1993-01 — 2026-04

Peak Month

1993-03

Production History

Cum Oil: 345,571 BBL Cum Gas: 81,365 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

2,533 BBL/mo

Di (annual)

30.6%

b-factor

0.8

EUR

236,298 BBL

R-squared

0.650

type

hyperbolic

Operator History (from monthly production reports)

1999-04 — 2026-07 PETRA OLEUM CORP. 328 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 (8)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
12PETRA OLEUM CORP.12,9002018-12-31
7PETRA OLEUM CORP.43,6002008-03-26
1PETRA OLEUM CORP.12,3602006-08-30
6PETRA OLEUM CORP.32,8002005-11-01
2PETRA OLEUM CORP.12,6572003-09-30
11PETRA OLEUM CORP.15,0001984-05-24
342-469-01271PETRA OLEUM CORP.------
442-469-01272PETRA OLEUM CORP.------