COOPER ESTATE

Oil · District 08 · Lease #35809

Operator: GREAT WESTERN DRILLING COMPANY

Cum Oil

519k BBL

Cum Gas

1.5M MCF

casinghead

Wells

4

Production

1998-05 — 2026-04

Peak Month

2000-08

Production History

Cum Oil: 519,347 BBL Cum Gas: 1,484,252 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

8,701 BBL/mo

Di (annual)

45.9%

b-factor

0.6

EUR

473,871 BBL

R-squared

0.953

type

hyperbolic

Operator History (from monthly production reports)

2024-11 — 2026-07 BASIN OIL & GAS OPERATING, LLC 21 mo
1998-05 — 2024-10 GREAT WESTERN DRILLING COMPANY 318 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1ABASIN OIL & GAS OPERATING, LLC16,5002000-04-11
2ABASIN OIL & GAS OPERATING, LLC16,5001999-09-16
4ABASIN OIL & GAS OPERATING, LLC16,5001999-09-16
3ABASIN OIL & GAS OPERATING, LLC16,5001998-04-17