OLDHAM

Oil · District 09 · Lease #186

Operator: CHEK OIL CO., LLC

Cum Oil

78k BBL

Cum Gas

21 MCF

casinghead

Wells

15

Production

1993-01 — 2026-04

Peak Month

2006-10

Production History

Cum Oil: 77,569 BBL Cum Gas: 21 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

330 BBL/mo

Di (annual)

17.0%

b-factor

0.6

EUR

40,884 BBL

R-squared

0.638

type

hyperbolic

Operator History (from monthly production reports)

2019-06 — 2026-07 CHEK OIL CO., LLC 86 mo
1993-01 — 2019-05 CHEK OIL CO. 317 mo

Wells (15)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
11CHEK OIL CO., LLC11,4002003-09-25
10CHEK OIL CO., LLC11,5002001-08-07
6CHEK OIL CO., LLC11,5001997-03-14
8 ACHEK OIL CO., LLC11,5001996-09-18
7 ACHEK OIL CO., LLC11,4501993-03-24
2CHEK OIL CO., LLC11,6001990-11-30
3 ACHEK OIL CO., LLC11,6001990-11-03
3-ACHEK OIL CO., LLC11,6001990-11-03
1CHEK OIL CO., LLC11,6001990-01-04
6 ACHEK OIL CO., LLC11,6001989-02-14
5CHEK OIL CO., LLC11,6001988-01-18
442-009-80725CHEK OIL CO., LLC------
742-009-80728CHEK OIL CO., LLC------
842-009-80729CHEK OIL CO., LLC------
942-009-80730CHEK OIL CO., LLC------