< leases

BRILLHART, S. L.

Oil · District 10 · Lease #5897

Operator: UNITED OIL & SHALE LLC

Fields: PEERY (CLEVELAND)

Cum Oil

46k BBL

Cum Gas

938k MCF

casinghead

Wells

4

Production

1993-01 — 2016-02

Peak Month

1993-11

Production History

Cum Oil: 45,833 BBL Cum Gas: 938,490 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

448 BBL/mo

Di (annual)

51.9%

b-factor

0.2

EUR

12,841 BBL

R-squared

0.637

type

hyperbolic

Operator History (from monthly production reports)

2026-02 — 2026-07 UNITED OIL & SHALE LLC 6 mo
2019-07 — 2026-01 PRESIDIO PETROLEUM LLC 79 mo
2000-04 — 2019-06 APACHE CORPORATION 231 mo
1997-10 — 2000-03 CRESCENDO RESOURCES, L.P. 30 mo
1995-02 — 1997-09 MIDGARD ENERGY COMPANY 32 mo
1993-01 — 1995-01 MAXUS EXPLORATION COMPANY 25 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
442-357-31576UNITED OIL & SHALE LLC37,5602008-01-09
482342-357-31576UNITED OIL & SHALE LLC37,5602008-01-09
342-357-31244MAXUS EXPLORATION COMPANY29,2501989-09-27
242-357-00383DIAMOND SHAMROCK EXPLORATION CO.19,0001984-12-10