LA GRANGE

Oil · District 01 · Lease #1632

Operator: UNDERBRINK OIL

Fields: SOMERSET

Cum Oil

4k BBL

Cum Gas

20 MCF

casinghead

Wells

9

Production

1993-01 — 2026-04

Peak Month

1996-09

Production History

Cum Oil: 4,255 BBL Cum Gas: 20 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

73 BBL/mo

Di (annual)

111.2%

b-factor

0.9

EUR

2,733 BBL

R-squared

0.369

type

hyperbolic

Operator History (from monthly production reports)

2021-05 — 2026-07 CALFAS OIL, LLC 63 mo
2007-07 — 2021-04 UNDERBRINK OIL 166 mo
1995-02 — 2007-06 AMINEX USA, INC. 149 mo
1993-10 — 1995-01 CASPEN OPERATING COMPANY 16 mo
1993-01 — 1993-09 DEVON ENERGY CORPORATION(NEVADA) 9 mo

Wells (9)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
5ACALFAS OIL, LLC11,6401982-02-09
4ACALFAS OIL, LLC11,6251981-03-27
3ACALFAS OIL, LLC11,6601980-10-23
1042-013-80874CALFAS OIL, LLC------
1142-013-80875CALFAS OIL, LLC------
1A42-013-00216CALFAS OIL, LLC------
2A42-013-00175CALFAS OIL, LLC------
542-013-80275CALFAS OIL, LLC------
942-013-80276CALFAS OIL, LLC------