PIPER 689

Oil · District 14 · Lease #7106

Operator: WHITING PETROLEUM CORPORATION

Cum Oil

914 BBL

Cum Gas

0 MCF

Wells

1

Production

1996-01 — 2006-02

Peak Month

1996-01

Production History

Cum Oil: 914 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

156 BBL/mo

Di (annual)

212.9%

b-factor

0.0

EUR

879 BBL

R-squared

0.847

type

exponential

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1SCARTH OIL & GAS CO.210,4001996-03-15
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