MCKENNEY -A-

Oil · District 08 · Lease #27871

Operator: SWJN OIL COMPANY

Fields: WESTBROOK, EAST (CLEAR FORK)

Cum Oil

13k BBL

Cum Gas

22 MCF

casinghead

Wells

4

Production

1993-01 — 2026-04

Peak Month

1996-08

Production History

Cum Oil: 13,190 BBL Cum Gas: 22 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

140 BBL/mo

Di (annual)

16.6%

b-factor

0.0

EUR

10,061 BBL

R-squared

0.379

type

exponential

Operator History (from monthly production reports)

2025-11 — 2026-07 ROYAL ORYX OG LLC 9 mo

2024-04 — 2025-10 ONE NICKEL OPERATING LLC 19 mo

2013-07 — 2024-03 SWJN OIL COMPANY 129 mo

2012-03 — 2013-06 MARTINEAU PETROLEUM, INC. 16 mo

2008-02 — 2012-02 NRPC OPERATING, LLC 49 mo

2006-04 — 2008-01 MIDLAND OPERATING, INC. 22 mo

2003-11 — 2006-03 CHAMBERS OPERATING, INC. 29 mo

1993-01 — 2003-10 MCKENNEY & CHAMBERS OIL COMPANY 130 mo

Wells (4)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
2A	42-335-32491	ROYAL ORYX OG LLC	1	3,500	1983-03-08
3	42-335-32484	ROYAL ORYX OG LLC	1	3,300	1983-02-18
2	42-335-32458	ROYAL ORYX OG LLC	1	3,500	1982-12-31
1	42-335-32447	ROYAL ORYX OG LLC	2	3,600	1982-12-30