UNIVERSITY -169-

Oil · District 08 · Lease #20559

Operator: HENRY PETROLEUM LP

Cum Oil

28k BBL

Cum Gas

20k MCF

casinghead

Wells

3

Production

1993-01 — 2001-06

Peak Month

1993-10

Production History

Cum Oil: 28,342 BBL Cum Gas: 19,892 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,082 BBL/mo

Di (annual)

175.5%

b-factor

1.3

EUR

49,059 BBL

R-squared

0.700

type

hyperbolic

Operator History (from monthly production reports)

2001-04 — 2002-01 HENRY PETROLEUM LP 9 mo
1993-01 — 2001-03 HENRY PETROLEUM CORP. 99 mo

Wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
5HIGHMARK ENERGY OPERATING, LLC15,0001993-02-05
342-003-10891HIGHMARK ENERGY OPERATING, LLC------
442-003-10923HIGHMARK ENERGY OPERATING, LLC------