CHALK, G. O. -A-

Oil · District 10 · Lease #2685

Operator: CONOCOPHILLIPS COMPANY

Cum Oil

43k BBL

Cum Gas

0 MCF

Wells

4

Production

1993-01 — 2012-03

Peak Month

1995-11

Production History

Cum Oil: 43,313 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

693 BBL/mo

Di (annual)

48.5%

b-factor

0.6

EUR

35,981 BBL

R-squared

0.801

type

hyperbolic

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
55CONOCO INC.13,2701993-06-17
12CONOCO INC.23,0501980-08-28
442-227-04238--------
942-227-10054--------
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