< leases

H & J SEC. 371

Oil · District 8A · Lease #5491

Operator: WESTPORT OIL AND GAS COMPANY, LP

Fields: SEMINOLE, WEST

Cum Oil

74k BBL

Cum Gas

152k MCF

casinghead

Wells

2

Production

1993-01 — 2026-04

Peak Month

2003-09

Production History

Cum Oil: 74,420 BBL Cum Gas: 152,175 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

703 BBL/mo

Di (annual)

27.8%

b-factor

0.7

EUR

64,561 BBL

R-squared

0.834

type

hyperbolic

Operator History (from monthly production reports)

2024-02 — 2026-07 ROCK FISH OPERATING LLC 30 mo
2016-03 — 2024-01 ENDEAVOR ENERGY RESOURCES L.P. 95 mo
2011-03 — 2016-02 TRINITY BAY OIL & GAS, INC. 60 mo
2010-03 — 2011-02 DELEK ENERGY SYSTEMS US, INC. 12 mo
2003-09 — 2010-02 ARIES OPERATING, LP 78 mo
2002-08 — 2003-08 ARIES OPERATING, LLC 13 mo
2002-03 — 2002-07 WESTPORT OIL AND GAS COMPANY, LP 5 mo
1998-09 — 2002-02 BELCO ENERGY CORP. 42 mo
1993-01 — 1998-08 CODA ENERGY, INC. 68 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
842-165-31805ROCK FISH OPERATING LLC15,5001980-05-13
442-165-01593ROCK FISH OPERATING LLC------