TRUST "139" LEASE

Oil · District 8 · Lease #28691

Operator: VAN OPERATING, LTD.

Cum Oil

17k BBL

Cum Gas

0 MCF

Wells

1

Production

1999-10 — 2004-04

Peak Month

2000-03

Production History

Cum Oil: 17,407 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

2,778 BBL/mo

Di (annual)

562.4%

b-factor

0.5

EUR

11,738 BBL

R-squared

0.823

type

hyperbolic

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1VAN OPERATING, LTD.35,0001999-10-21
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