JOHN UNIT

Oil · District 11 · Lease #67871

Operator: PATTERSON PETROLEUM, INC.

Cum Oil

33k BBL

Cum Gas

0 MCF

Wells

1

Production

1998-02 — 1999-09

Peak Month

1998-03

Production History

Cum Oil: 33,452 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

2,599 BBL/mo

Di (annual)

118.2%

b-factor

2.0

EUR

261,724 BBL

R-squared

0.858

type

hyperbolic

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1PATTERSON PETROLEUM, INC.15,1501998-01-08
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