BIG CHIEF

Oil · District 10 · Lease #41788

Operator: COG OPERATING LLC

Cum Oil

9k BBL

Cum Gas

0 MCF

Wells

2

Production

2011-06 — 2014-09

Peak Month

2012-02

Production History

Cum Oil: 8,525 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

2,412 BBL/mo

Di (annual)

497.5%

b-factor

0.0

EUR

5,899 BBL

R-squared

0.619

type

exponential

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4801COG OPERATING LLC614,5002015-10-27
4715COG OPERATING LLC312,0002013-04-17
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