< leases

COWDEN RANCH "49"

Oil · District 08 · Lease #37159

Operator: VANGUARD OPERATING, LLC

Fields: ROEPKE (UPPER DEVONIAN)

Cum Oil

186k BBL

Cum Gas

165k MCF

casinghead

Wells

1

Production

2003-09 — 2026-04

Peak Month

2003-10

Production History

Cum Oil: 185,818 BBL Cum Gas: 164,976 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,936 BBL/mo

Di (annual)

13.4%

b-factor

0.2

EUR

209,117 BBL

R-squared

0.941

type

hyperbolic

Operator History (from monthly production reports)

2025-08 — 2026-07 R3 OPERATING CORPORATION 12 mo
2025-04 — 2025-07 T2 OPERATING CORPORATION 4 mo
2021-02 — 2025-03 BOAZ ENERGY II OPERATING, LLC 50 mo
2019-09 — 2021-01 GRIZZLY OP OF DELAWARE, LLC 17 mo
2015-10 — 2019-08 VANGUARD OPERATING, LLC 47 mo
2011-12 — 2015-09 LRE OPERATING, LLC 46 mo
2008-05 — 2011-11 LIME ROCK RESOURCES A, L.P. 43 mo
2003-09 — 2008-04 SOUTHWESTERN ENERGY PROD. CO. 56 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
242-103-34937R3 OPERATING CORPORATION16,6002003-08-11