CARLINVILLE NATIONAL BANK

Oil · District 08 · Lease #15281

Operator: SLANT OPERATING, LLC

Cum Oil

283k BBL

Cum Gas

396k MCF

casinghead

Wells

5

Production

1993-01 — 2026-04

Peak Month

1996-07

Production History

Cum Oil: 283,179 BBL Cum Gas: 395,568 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,435 BBL/mo

Di (annual)

14.8%

b-factor

2.0

EUR

346,423 BBL

R-squared

0.578

type

hyperbolic

Operator History (from monthly production reports)

2023-11 — 2026-07 FORMENTERA OPERATIONS LLC 33 mo
2021-07 — 2023-10 SLANT OPERATING, LLC 28 mo
2000-07 — 2021-06 APACHE CORPORATION 252 mo
1996-07 — 2000-06 COLLINS & WARE, INC. 48 mo
1993-01 — 1996-06 AMERADA HESS CORPORATION 42 mo

Wells (5)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
8FORMENTERA OPERATIONS LLC110,7051996-10-08
2FORMENTERA OPERATIONS LLC110,1801996-08-30
1FORMENTERA OPERATIONS LLC110,7501978-12-06
12FORMENTERA OPERATIONS LLC18,9201978-08-29
4 U42-135-02455FORMENTERA OPERATIONS LLC------