SHEPPARD "CI"

Oil · District 13 · Lease #29613

Operator: CHIEF OIL & GAS LLC *

Cum Oil

7k BBL

Cum Gas

0 MCF

Wells

1

Production

1998-12 — 2004-03

Peak Month

1998-12

Production History

Cum Oil: 6,928 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

1,677 BBL/mo

Di (annual)

985.0%

b-factor

0.6

EUR

4,957 BBL

R-squared

0.903

type

hyperbolic

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3DEVON ENERGY PRODUCTION CO, L.P.46,2002015-11-06
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