< leases

CASTON

Oil · District 05 · Lease #3439

Operator: URSUS OIL AND GAS

Fields: PAN WARE (RODESSA)

Cum Oil

32k BBL

Cum Gas

109k MCF

casinghead

Wells

2

Production

1993-01 — 2025-07

Peak Month

1993-04

Production History

Cum Oil: 32,087 BBL Cum Gas: 109,260 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

300 BBL/mo

Di (annual)

11.3%

b-factor

0.0

EUR

31,906 BBL

R-squared

0.629

type

exponential

Operator History (from monthly production reports)

2015-05 — 2026-07 URSUS OIL AND GAS 135 mo
2014-07 — 2015-04 CL&F OPERATING LLC 10 mo
2009-12 — 2014-06 IRONWOOD OIL & GAS LLC 55 mo
2007-07 — 2009-11 SAMSON LONE STAR, LLC 29 mo
2005-03 — 2007-06 SAMSON LONE STAR LP 28 mo
1995-06 — 2005-02 MAP PRODUCTION CO., INC. 117 mo
1993-01 — 1995-05 MARATHON OIL COMPANY 29 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
242-349-33777MAP PRODUCTION CO. INC.411,3001998-05-26
142-349-33050MARATHON OIL COMPANY211,3001992-12-29