SUGG "B"

Oil · District 9 · Lease #11403

Operator: KEYSTONE ENERGY OIL & GAS, INC.

Cum Oil

7k BBL

Cum Gas

0 MCF

Wells

4

Production

1993-01 — 1996-09

Peak Month

1993-04

Production History

Cum Oil: 6,581 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

328 BBL/mo

Di (annual)

63.7%

b-factor

0.0

EUR

6,167 BBL

R-squared

0.403

type

exponential

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3USENCO-KEYSTONE18,2001985-01-03
4USENCO-KEYSTONE18,2001985-01-03
1USENCO-KEYSTONE18,2001984-12-17
2USENCO-KEYSTONE18,2001984-12-17
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