< leases

COWDEN RANCH "48"

Oil · District 08 · Lease #36606

Operator: VANGUARD OPERATING, LLC

Fields: ROEPKE (UPPER DEVONIAN)

Cum Oil

455k BBL

Cum Gas

506k MCF

casinghead

Wells

2

Production

2001-04 — 2026-04

Peak Month

2001-10

Production History

Cum Oil: 455,121 BBL Cum Gas: 505,695 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

7,356 BBL/mo

Di (annual)

113.3%

b-factor

1.2

EUR

399,290 BBL

R-squared

0.821

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
2001-04 — 2008-04 SOUTHWESTERN ENERGY PROD. CO. 85 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
842-103-34834R3 OPERATING CORPORATION27,7002001-05-14
742-103-34795R3 OPERATING CORPORATION27,8002001-04-02