JOHNSTON, ANNIE

Oil · District 8 · Lease #4965

Operator: ASHTOLA EXPLORATION COMPANY,INC.

Cum Oil

9k BBL

Cum Gas

0 MCF

Wells

4

Production

1993-01 — 2009-07

Peak Month

1996-06

Production History

Cum Oil: 8,753 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

212 BBL/mo

Di (annual)

264.3%

b-factor

0.5

EUR

1,797 BBL

R-squared

0.393

type

hyperbolic

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
6ASHTOLA EXPLORATION COMPANY,INC.14,9991987-10-22
3ASHTOLA EXPLORATION COMPANY,INC.14,9991985-12-06
4ASHTOLA EXPLORATION COMPANY,INC.14,9991985-12-03
1 T42-447-02781--------
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