CHALK, G. O. -E-

Oil · District 10 · Lease #18991

Operator: CONOCOPHILLIPS COMPANY

Cum Oil

310k BBL

Cum Gas

0 MCF

Wells

11

Production

1993-01 — 2012-04

Peak Month

1993-12

Production History

Cum Oil: 309,915 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

1,995 BBL/mo

Di (annual)

6.1%

b-factor

0.0

EUR

372,110 BBL

R-squared

0.575

type

exponential

Wells (11)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
24CONOCO INC.23,2501988-04-26
24LCONOCO INC.23,2501988-04-26
7CONOCO INC.23,2151984-03-14
21CONOCO INC.23,2501982-07-23
19CONOCO INC.13,1501980-06-05
10W42-227-10074--------
1142-227-10075--------
1742-227-30492--------
442-227-02518--------
842-227-00508--------
9 L42-227-00504--------
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