FRYSAK

Oil · District 10 · Lease #28518

Operator: COSTILLA PETROLEUM CORPORATION

Cum Oil

181 BBL

Cum Gas

0 MCF

Wells

4

Production

1993-01 — 1994-03

Peak Month

1993-02

Production History

Cum Oil: 181 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

53 BBL/mo

Di (annual)

378.3%

b-factor

0.0

EUR

168 BBL

R-squared

0.786

type

exponential

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
6L & B OIL CO. INC.110,1001985-06-28
4L & B OIL CO. INC.110,1001985-02-04
2L & B OIL CO. INC.111,3001984-06-29
1L & B OIL CO. INC.111,0351983-07-13
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