CHADBOURNE RANCH 431 -A-

Oil · District 9 · Lease #12984

Operator: WESTPORT OIL AND GAS COMPANY, LP

Cum Oil

24k BBL

Cum Gas

0 MCF

Wells

4

Production

1993-01 — 2006-05

Peak Month

1993-01

Production History

Cum Oil: 24,324 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

2,463 BBL/mo

Di (annual)

345.7%

b-factor

0.4

EUR

14,179 BBL

R-squared

0.694

type

hyperbolic

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
5WAGMAN PETROLEUM, INC.15,9001991-12-18
4WAGMAN PETROLEUM, INC.15,9001991-08-29
2WAGMAN PETROLEUM, INC.15,9001991-03-18
1 HWAGMAN PETROLEUM, INC.35,9001990-10-22
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