MARY

Oil · District 14 · Lease #5393

Operator: RIO PETROLEUM, INC.

Cum Oil

843 BBL

Cum Gas

0 MCF

Wells

1

Production

1993-01 — 1998-11

Peak Month

1996-05

Production History

Cum Oil: 843 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

30 BBL/mo

Di (annual)

411.7%

b-factor

0.8

EUR

220 BBL

R-squared

0.458

type

hyperbolic

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1DENALI EXPLORATION, INC.17,2501983-01-25
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