COFFIELD B-11 LEASE (T-470)

Oil · District 3 · Lease #12133

Operator: SIERRA MINERALS, INC.

Cum Oil

490 BBL

Cum Gas

0 MCF

Wells

1

Production

1993-01 — 2006-01

Peak Month

1996-09

Production History

Cum Oil: 490 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

26 BBL/mo

Di (annual)

77.1%

b-factor

0.0

EUR

396 BBL

R-squared

0.747

type

exponential

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3CADDO OIL CO.-CALDWELL DIST.13,4001977-12-09
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