COOPER 358

Oil · District 14 · Lease #7764

Operator: HIGHMARK ENERGY OPERATING, LLC

Cum Oil

276k BBL

Cum Gas

0 MCF

Wells

4

Production

2007-05 — 2026-03

Peak Month

2008-10

Production History

Cum Oil: 276,282 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

7,165 BBL/mo

Di (annual)

71.6%

b-factor

0.5

EUR

227,628 BBL

R-squared

0.801

type

hyperbolic

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
5HEOG RESOURCES, INC.19,0002009-04-28
3HEOG RESOURCES, INC.19,0002008-04-14
2HEOG RESOURCES, INC.312,5002007-03-02
1HEOG RESOURCES, INC.212,0002006-12-21
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