CNB "G" 345

Oil · District 10 · Lease #7678

Operator: HIGHMARK ENERGY OPERATING, LLC

Cum Oil

143k BBL

Cum Gas

931k MCF

casinghead

Wells

3

Production

2006-07 — 2026-04

Peak Month

2007-04

Production History

Cum Oil: 142,853 BBL Cum Gas: 931,267 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

2,836 BBL/mo

Di (annual)

59.0%

b-factor

0.6

EUR

123,695 BBL

R-squared

0.689

type

hyperbolic

Operator History (from monthly production reports)

2022-02 — 2026-07 HIGHMARK ENERGY OPERATING, LLC 54 mo
2006-07 — 2022-01 EOG RESOURCES, INC. 187 mo

Wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
12HHIGHMARK ENERGY OPERATING, LLC19,0002007-02-01
11HHIGHMARK ENERGY OPERATING, LLC19,0002006-08-18
10HHIGHMARK ENERGY OPERATING, LLC19,0002006-05-08