< leases

MCCOLLUM,F. T. & WIEBUSCH, G. W.

Oil · District 08 · Lease #7825

Operator: ZARVONA ENERGY LLC

Fields: WEMAC (WOLFCAMP)

Cum Oil

97k BBL

Cum Gas

68k MCF

casinghead

Wells

4

Production

1993-01 — 2026-04

Peak Month

1993-10

Production History

Cum Oil: 97,096 BBL Cum Gas: 67,851 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,045 BBL/mo

Di (annual)

68.4%

b-factor

1.2

EUR

79,254 BBL

R-squared

0.690

type

hyperbolic

Operator History (from monthly production reports)

2017-03 — 2026-07 ZARVONA ENERGY LLC 113 mo
2003-12 — 2017-02 CARDWELL OIL CORPORATION 159 mo
1999-07 — 2003-11 OMAR OPERATING COMPANY 53 mo
1996-08 — 1999-06 VISTA RESOURCES, INC. (A) 35 mo
1993-04 — 1996-07 MERIT ENERGY COMPANY 40 mo
1993-01 — 1993-03 CONOCO INC. 3 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
342-003-00950ZARVONA ENERGY LLC311,0002004-04-21
1R42-003-36886ZARVONA ENERGY LLC19,5001991-02-08
542-003-00958ZARVONA ENERGY LLC113,5641990-05-14
10W42-003-00963ZARVONA ENERGY LLC------