STATE TRACT 470

Oil · District 4 · Lease #12491

Operator: CHAPARRAL (USA) ENERGY, INC.

Cum Oil

151k BBL

Cum Gas

0 MCF

Wells

1

Production

1995-08 — 2013-07

Peak Month

1996-06

Production History

Cum Oil: 150,855 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

2,493 BBL/mo

Di (annual)

18.9%

b-factor

0.0

EUR

158,011 BBL

R-squared

0.722

type

exponential

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
7BRISTOL RESOURCES CORPORATION69,7071993-12-14
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