THE BIG "O" UNIT

Oil · District 11 · Lease #67127

Operator: ROCA RESOURCE COMPANY, INC.

Cum Oil

69k BBL

Cum Gas

0 MCF

Wells

1

Production

1993-07 — 2008-04

Peak Month

1993-09

Production History

Cum Oil: 68,823 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

1,442 BBL/mo

Di (annual)

29.6%

b-factor

0.2

EUR

72,745 BBL

R-squared

0.811

type

hyperbolic

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1ROCA RESOURCE COMPANY, INC.19,4001993-06-16
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