FOSTER

Oil · District 11 · Lease #68833

Operator: SCHALK OIL COMPANY, INC.

Cum Oil

153k BBL

Cum Gas

0 MCF

Wells

4

Production

2005-09 — 2026-03

Peak Month

2006-11

Production History

Cum Oil: 152,905 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

3,475 BBL/mo

Di (annual)

54.3%

b-factor

0.4

EUR

124,795 BBL

R-squared

0.901

type

hyperbolic

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1ASCHALK OIL COMPANY, INC.14,2002006-10-04
6SCHALK OIL COMPANY, INC.14,2002006-09-18
5SCHALK OIL COMPANY, INC.14,2002006-08-01
2SCHALK OIL COMPANY, INC.24,1002005-08-24
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