SPRAGUE "B"

Oil · District 10 · Lease #23667

Operator: UHC PETROLEUM CORPORATION

Cum Oil

5k BBL

Cum Gas

0 MCF

Wells

4

Production

1993-01 — 2012-03

Peak Month

1998-05

Production History

Cum Oil: 5,109 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

190 BBL/mo

Di (annual)

71.5%

b-factor

0.1

EUR

3,504 BBL

R-squared

0.738

type

hyperbolic

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2HRUBETZ OPERATING COMPANY12,7051985-05-22
2WHRUBETZ OPERATING COMPANY12,7051985-05-22
142-227-30789--------
342-173-30315--------
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