KEYSTONE -4-

Oil · District 10 · Lease #29169

Operator: WHITING OIL AND GAS CORPORATION

Cum Oil

118k BBL

Cum Gas

0 MCF

Wells

1

Production

1993-01 — 2019-08

Peak Month

2002-11

Production History

Cum Oil: 118,044 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

583 BBL/mo

Di (annual)

12.2%

b-factor

0.0

EUR

57,395 BBL

R-squared

0.503

type

exponential

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1SOUTHLAND ROYALTY COMPANY19,0001984-05-07
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