UNIVERSITY -F-

Oil · District 08 · Lease #19655

Operator: LEGACY RESERVES OPERATING LP

Cum Oil

317k BBL

Cum Gas

125k MCF

casinghead

Wells

3

Production

1993-01 — 2026-04

Peak Month

2001-03

Production History

Cum Oil: 316,768 BBL Cum Gas: 124,667 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

2,578 BBL/mo

Di (annual)

20.0%

b-factor

0.7

EUR

303,747 BBL

R-squared

0.842

type

hyperbolic

Operator History (from monthly production reports)

2023-03 — 2026-07 HIGHMARK ENERGY OPERATING, LLC 41 mo
2013-01 — 2023-02 LEGACY RESERVES OPERATING LP 122 mo
2009-01 — 2012-12 COG OPERATING LLC 48 mo
2001-04 — 2008-12 HENRY PETROLEUM LP 93 mo
2000-07 — 2001-03 HENRY PETROLEUM CORP. 9 mo
2000-03 — 2000-06 3TEC ENERGY CORPORATION 4 mo
1993-01 — 2000-02 FLOYD OPERATING COMPANY 86 mo

Wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3HIGHMARK ENERGY OPERATING, LLC19,9322000-11-16
4LHIGHMARK ENERGY OPERATING, LLC19,6541990-04-11
8 L42-003-10524HIGHMARK ENERGY OPERATING, LLC------