ANNA

Oil · District 8 · Lease #28516

Operator: ROBERTSON RESOURCES, INC.

Cum Oil

174 BBL

Cum Gas

0 MCF

Wells

1

Production

1998-04 — 2012-08

Peak Month

1998-04

Production History

Cum Oil: 174 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

54 BBL/mo

Di (annual)

978.0%

b-factor

0.3

EUR

94 BBL

R-squared

0.531

type

hyperbolic

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1ROBERTSON RESOURCES, INC.27,0001998-03-05
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