CHAPMAN

Oil · District 4 · Lease #13173

Operator: VENTEX OPERATING CORP.

Cum Oil

18k BBL

Cum Gas

0 MCF

Wells

1

Production

2003-08 — 2008-03

Peak Month

2003-12

Production History

Cum Oil: 17,622 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

828 BBL/mo

Di (annual)

40.4%

b-factor

0.0

EUR

24,537 BBL

R-squared

0.685

type

exponential

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1045VENTEX OPERATING CORP.212,0002003-02-19
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