BROWNLEE-COOK 127

Oil · District 14 · Lease #8428

Operator: HIGHMARK ENERGY OPERATING, LLC

Cum Oil

300k BBL

Cum Gas

0 MCF

Wells

4

Production

2010-09 — 2026-03

Peak Month

2011-01

Production History

Cum Oil: 300,194 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

12,708 BBL/mo

Di (annual)

183.4%

b-factor

0.7

EUR

231,113 BBL

R-squared

0.910

type

hyperbolic

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
5HEOG RESOURCES, INC.19,0002010-06-18
3HEOG RESOURCES, INC.19,0002010-06-17
4HEOG RESOURCES, INC.19,0002010-06-17
2HEOG RESOURCES, INC.19,0002010-03-04
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