< leases

L. FOSTER -8-

Oil · District 08 · Lease #25183

Operator: STANOLIND PRODUCTION LLC

Fields: CONGER (PENN)

Cum Oil

43k BBL

Cum Gas

1.7M MCF

casinghead

Wells

7

Production

1993-01 — 2026-04

Peak Month

1993-09

Production History

Cum Oil: 42,936 BBL Cum Gas: 1,672,207 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

618 BBL/mo

Di (annual)

27.7%

b-factor

0.3

EUR

37,367 BBL

R-squared

0.782

type

hyperbolic

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
1042-431-32885BURK ROYALTY CO., LTD.18,1501997-08-06
1142-431-32886BURK ROYALTY CO., LTD.18,1501997-08-06
942-431-32689BURK ROYALTY CO., LTD.18,5001993-07-21
842-431-32614BURK ROYALTY CO., LTD.18,3001993-02-18
642-431-32166BURK ROYALTY CO., LTD.18,3001990-10-29
242-431-30614BURK ROYALTY CO., LTD.18,4501977-10-20
142-431-30608BURK ROYALTY CO., LTD.18,4501977-09-23