RADER 251

Oil · District 10 · Lease #8690

Operator: HIGHMARK ENERGY OPERATING, LLC

Cum Oil

184k BBL

Cum Gas

2.6M MCF

casinghead

Wells

3

Production

2012-07 — 2026-04

Peak Month

2012-09

Production History

Cum Oil: 183,508 BBL Cum Gas: 2,635,792 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

21,506 BBL/mo

Di (annual)

686.9%

b-factor

0.7

EUR

114,314 BBL

R-squared

0.905

type

hyperbolic

Operator History (from monthly production reports)

2022-02 — 2026-07 HIGHMARK ENERGY OPERATING, LLC 54 mo
2012-07 — 2022-01 EOG RESOURCES, INC. 115 mo

Wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2HHIGHMARK ENERGY OPERATING, LLC19,0002012-04-13
4HHIGHMARK ENERGY OPERATING, LLC19,0002012-04-13
3HHIGHMARK ENERGY OPERATING, LLC19,0002012-03-29