BARNSLEY UNIT

Oil · District 08 · Lease #21178

Operator: EXTEX OPERATING COMPANY

Cum Oil

1.5M BBL

Cum Gas

1.2M MCF

casinghead

Wells

47

Production

1993-01 — 2026-04

Peak Month

1997-05

Production History

Cum Oil: 1,452,470 BBL Cum Gas: 1,220,679 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

9,237 BBL/mo

Di (annual)

9.4%

b-factor

0.0

EUR

1,165,502 BBL

R-squared

0.616

type

exponential

Operator History (from monthly production reports)

2021-09 — 2026-07 EXTEX OPERATING COMPANY 59 mo
2003-09 — 2021-08 ENDEAVOR ENERGY RESOURCES L.P. 216 mo
1993-01 — 2003-08 ANADARKO PETROLEUM CORPORATION 128 mo

Wells (47)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2EXTEX OPERATING COMPANY12,3001992-05-26
42EXTEX OPERATING COMPANY14,4001981-07-21
43EXTEX OPERATING COMPANY14,4001981-07-21
41EXTEX OPERATING COMPANY14,4001980-10-01
40EXTEX OPERATING COMPANY14,4001980-01-15
39EXTEX OPERATING COMPANY14,4001978-12-01
1042-103-04649EXTEX OPERATING COMPANY------
11W42-103-04654EXTEX OPERATING COMPANY------
12W42-103-00256EXTEX OPERATING COMPANY------
1342-103-00255EXTEX OPERATING COMPANY------
14W42-103-04650EXTEX OPERATING COMPANY------
1542-103-04651EXTEX OPERATING COMPANY------
1642-103-02962EXTEX OPERATING COMPANY------
17W42-103-02963EXTEX OPERATING COMPANY------
1842-103-82598EXTEX OPERATING COMPANY------
19W42-103-05827EXTEX OPERATING COMPANY------
1W42-103-02960EXTEX OPERATING COMPANY------
2042-103-05274EXTEX OPERATING COMPANY------
21W42-103-02969EXTEX OPERATING COMPANY------
2242-103-02973EXTEX OPERATING COMPANY------
2342-103-05091EXTEX OPERATING COMPANY------
2442-103-04902EXTEX OPERATING COMPANY------
2542-103-05217EXTEX OPERATING COMPANY------
26W42-103-04678EXTEX OPERATING COMPANY------
2742-103-04899EXTEX OPERATING COMPANY------
2842-103-02965EXTEX OPERATING COMPANY------
2942-103-04210EXTEX OPERATING COMPANY------
30W42-103-04215EXTEX OPERATING COMPANY------
31W42-103-02966EXTEX OPERATING COMPANY------
3242-103-02967EXTEX OPERATING COMPANY------
3342-103-10090EXTEX OPERATING COMPANY------
3442-103-05258EXTEX OPERATING COMPANY------
3642-103-30212EXTEX OPERATING COMPANY------
3742-103-31382EXTEX OPERATING COMPANY------
3842-103-31509EXTEX OPERATING COMPANY------
3W42-103-04850EXTEX OPERATING COMPANY------
442-103-04851EXTEX OPERATING COMPANY------
5W42-103-00257EXTEX OPERATING COMPANY------
642-103-00258EXTEX OPERATING COMPANY------
7W42-103-02968EXTEX OPERATING COMPANY------
8 L42-103-05683EXTEX OPERATING COMPANY------
942-103-04903EXTEX OPERATING COMPANY------
I 1W42-103-30142EXTEX OPERATING COMPANY------
I 2W42-103-30143EXTEX OPERATING COMPANY------
I 3W42-103-30144EXTEX OPERATING COMPANY------
I 4W42-103-30145EXTEX OPERATING COMPANY------
I 5W42-103-30146EXTEX OPERATING COMPANY------