JOHNSON, J. L. -31-

Oil · District 08 · Lease #21835

Operator: GREAT WESTERN DRILLING COMPANY

Fields: FOSTER

Cum Oil

2.3M BBL

Cum Gas

488k MCF

casinghead

Wells

29

Production

1993-01 — 2026-04

Peak Month

1994-07

Production History

Cum Oil: 2,293,092 BBL Cum Gas: 487,644 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

8,126 BBL/mo

Di (annual)

2.5%

b-factor

0.0

EUR

2,801,837 BBL

R-squared

0.594

type

exponential

Operator History (from monthly production reports)

2024-11 — 2026-07 BASIN OIL & GAS OPERATING, LLC 21 mo
1993-01 — 2024-10 GREAT WESTERN DRILLING COMPANY 382 mo

Wells (29)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
27BASIN OIL & GAS OPERATING, LLC15,0002004-09-14
27WBASIN OIL & GAS OPERATING, LLC15,0002004-09-14
26BASIN OIL & GAS OPERATING, LLC15,0002004-08-23
25BASIN OIL & GAS OPERATING, LLC14,7502000-11-10
25WBASIN OIL & GAS OPERATING, LLC14,7502000-11-10
24BASIN OIL & GAS OPERATING, LLC39,1002000-01-28
15RBASIN OIL & GAS OPERATING, LLC14,5001997-11-12
22BASIN OIL & GAS OPERATING, LLC14,4001984-08-21
21WBASIN OIL & GAS OPERATING, LLC14,5001979-06-29
142-135-03904BASIN OIL & GAS OPERATING, LLC------
1042-135-04094BASIN OIL & GAS OPERATING, LLC------
10W42-135-04094BASIN OIL & GAS OPERATING, LLC------
11W42-135-04095BASIN OIL & GAS OPERATING, LLC------
1242-135-04096BASIN OIL & GAS OPERATING, LLC------
13W42-135-04097BASIN OIL & GAS OPERATING, LLC------
1442-135-04098BASIN OIL & GAS OPERATING, LLC------
1542-135-30535BASIN OIL & GAS OPERATING, LLC------
1642-135-30932BASIN OIL & GAS OPERATING, LLC------
1742-135-30933BASIN OIL & GAS OPERATING, LLC------
1842-135-31244BASIN OIL & GAS OPERATING, LLC------
19W42-135-31245BASIN OIL & GAS OPERATING, LLC------
242-135-04294BASIN OIL & GAS OPERATING, LLC------
20W42-135-31739BASIN OIL & GAS OPERATING, LLC------
342-135-04295BASIN OIL & GAS OPERATING, LLC------
442-135-04296BASIN OIL & GAS OPERATING, LLC------
542-135-04089BASIN OIL & GAS OPERATING, LLC------
642-135-04090BASIN OIL & GAS OPERATING, LLC------
742-135-04091BASIN OIL & GAS OPERATING, LLC------
942-135-04093BASIN OIL & GAS OPERATING, LLC------