< leases

L. FOSTER -9-

Oil · District 08 · Lease #25398

Operator: STANOLIND PRODUCTION LLC

Fields: CONGER (PENN)

Cum Oil

31k BBL

Cum Gas

1.7M MCF

casinghead

Wells

7

Production

1993-01 — 2026-04

Peak Month

1997-10

Production History

Cum Oil: 30,531 BBL Cum Gas: 1,666,422 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

151 BBL/mo

Di (annual)

11.9%

b-factor

0.0

EUR

15,178 BBL

R-squared

0.388

type

exponential

Operator History (from monthly production reports)

2022-01 — 2026-07 BURK ROYALTY CO., LTD. 55 mo
2021-01 — 2021-12 SLANT OPERATING, LLC 12 mo
2018-07 — 2020-12 STANOLIND PRODUCTION LLC 30 mo
2014-08 — 2018-06 EQT PRODUCTION TEXAS, LLC 47 mo
1998-09 — 2014-07 RANGE PRODUCTION COMPANY 191 mo
1997-03 — 1998-08 LOMAK PRODUCTION COMPANY 18 mo
1993-01 — 1997-02 AMERICAN COMETRA, INC. 50 mo

Wells (7)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
942-431-32884BURK ROYALTY CO., LTD.18,1501997-08-06
742-431-32857BURK ROYALTY CO., LTD.18,1501997-02-19
842-431-32858BURK ROYALTY CO., LTD.18,1501997-02-19
542-431-32256BURK ROYALTY CO., LTD.18,1001991-07-16
442-431-31057BURK ROYALTY CO., LTD.17,8001981-10-28
242-431-30904BURK ROYALTY CO., LTD.18,2001980-09-11
142-431-30692BURK ROYALTY CO., LTD.18,0001978-07-12