CUMMINS, H. E. -C-

Oil · District 08 · Lease #11966

Operator: SLANT OPERATING, LLC

Cum Oil

588k BBL

Cum Gas

1.7M MCF

casinghead

Wells

12

Production

1993-01 — 2026-04

Peak Month

2011-01

Production History

Cum Oil: 587,527 BBL Cum Gas: 1,744,091 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

4,922 BBL/mo

Di (annual)

40.1%

b-factor

0.8

EUR

373,710 BBL

R-squared

0.935

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
2007-04 — 2021-06 APACHE CORPORATION 171 mo
1995-05 — 2007-03 ANADARKO PETROLEUM CORPORATION 143 mo
1993-01 — 1995-04 MARATHON OIL COMPANY 28 mo

Wells (12)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
16FORMENTERA OPERATIONS LLC19,0002010-01-29
17FORMENTERA OPERATIONS LLC19,0002010-01-28
15FORMENTERA OPERATIONS LLC19,0002008-07-08
14FORMENTERA OPERATIONS LLC17,0001999-09-20
12FORMENTERA OPERATIONS LLC17,0001998-06-22
13FORMENTERA OPERATIONS LLC17,0001998-06-09
10RFORMENTERA OPERATIONS LLC16,6001996-09-04
8RFORMENTERA OPERATIONS LLC16,6001996-09-04
9RFORMENTERA OPERATIONS LLC16,5001995-07-17
7FORMENTERA OPERATIONS LLC16,3601994-07-13
10 L42-135-00336FORMENTERA OPERATIONS LLC------
8 L42-135-00334FORMENTERA OPERATIONS LLC------