DUKE RANCH

Oil · District 2 · Lease #8315

Operator: GILSTER, RALPH R. III

Cum Oil

4k BBL

Cum Gas

0 MCF

Wells

1

Production

1997-11 — 1999-07

Peak Month

1998-02

Production History

Cum Oil: 4,162 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

713 BBL/mo

Di (annual)

302.3%

b-factor

0.0

EUR

2,840 BBL

R-squared

0.671

type

exponential

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1GILSTER, RALPH R. III56,3002004-03-02
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