PIWONKA-MATCEK UNIT

Oil · District 3 · Lease #15142

Operator: WILLIAMS, CLAYTON W., JR., INC.

Cum Oil

16k BBL

Cum Gas

0 MCF

Wells

1

Production

1993-01 — 2001-07

Peak Month

1995-10

Production History

Cum Oil: 16,151 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

237 BBL/mo

Di (annual)

24.0%

b-factor

0.0

EUR

11,805 BBL

R-squared

0.458

type

exponential

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1WILLIAMS, CLAYTON W., JR.112,0001981-10-05
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