HORN -9-

Oil · District 08 · Lease #30757

Operator: NORTHSTAR OPERATING COMPANY

Cum Oil

6k BBL

Cum Gas

318k MCF

casinghead

Wells

1

Production

1993-01 — 2006-05

Peak Month

1993-07

Production History

Cum Oil: 6,278 BBL Cum Gas: 318,330 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

172 BBL/mo

Di (annual)

84.4%

b-factor

0.5

EUR

4,505 BBL

R-squared

0.762

type

hyperbolic

Operator History (from monthly production reports)

2004-01 — 2007-10 NORTHSTAR OPERATING COMPANY 46 mo
1996-02 — 2003-12 LIMARK CORPORATION 95 mo
1993-01 — 1996-01 MWJ PRODUCING COMPANY 37 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1VENCER ENERGY LLC110,5501985-05-28