GLASS 308

Oil · District 10 · Lease #8486

Operator: HIGHMARK ENERGY OPERATING, LLC

Cum Oil

214k BBL

Cum Gas

1.5M MCF

casinghead

Wells

2

Production

2011-02 — 2026-04

Peak Month

2011-03

Production History

Cum Oil: 213,714 BBL Cum Gas: 1,521,056 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

9,584 BBL/mo

Di (annual)

258.7%

b-factor

0.9

EUR

182,910 BBL

R-squared

0.763

type

hyperbolic

Operator History (from monthly production reports)

2022-02 — 2026-07 HIGHMARK ENERGY OPERATING, LLC 54 mo
2011-02 — 2022-01 EOG RESOURCES, INC. 132 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2HHIGHMARK ENERGY OPERATING, LLC19,0002010-11-16
1HHIGHMARK ENERGY OPERATING, LLC39,0002010-09-03