BLACKTAIL UNIT

Oil · District 3 · Lease #23474

Operator: UNION PACIFIC RESOURCES COMPANY

Cum Oil

64k BBL

Cum Gas

0 MCF

Wells

1

Production

1998-02 — 1998-11

Peak Month

1998-02

Production History

Cum Oil: 64,208 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

18,257 BBL/mo

Di (annual)

416.7%

b-factor

0.0

EUR

53,105 BBL

R-squared

0.675

type

exponential

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1UNION PACIFIC RESOURCES COMPANY18,0001997-11-26
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