KEMP-DERRICK UNIT

Oil · District 13 · Lease #30070

Operator: WESTERN CHIEF OPERATING, L.L.C.

Fields: MATLOCK

Cum Oil

1k BBL

Cum Gas

0 MCF

Wells

1

Production

2002-08 — 2008-03

Peak Month

2002-08

Production History

Cum Oil: 1,476 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

101 BBL/mo

Di (annual)

107.4%

b-factor

0.4

EUR

1,762 BBL

R-squared

0.710

type

hyperbolic

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1WESTERN CHIEF OIL & GAS COMPANY25,7002025-07-18
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