KEYSTONE CATTLE CO. -19-

Oil · District 10 · Lease #25701

Operator: WHITING OIL AND GAS CORPORATION

Cum Oil

200k BBL

Cum Gas

0 MCF

Wells

3

Production

1993-01 — 2026-03

Peak Month

1993-01

Production History

Cum Oil: 199,907 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

1,960 BBL/mo

Di (annual)

11.4%

b-factor

0.0

EUR

205,784 BBL

R-squared

0.850

type

exponential

Wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3CROWNQUEST OPERATING, LLC18,9992004-02-04
2HSOUTHLAND ROYALTY COMPANY28,4001988-08-22
1SOUTHLAND ROYALTY COMPANY19,8201979-09-21
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