GARY 36-A

Oil · District 10 · Lease #35351

Operator: COSTILLA ENERGY, INC.

Cum Oil

708 BBL

Cum Gas

0 MCF

Wells

1

Production

1997-04 — 1999-06

Peak Month

1997-04

Production History

Cum Oil: 708 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

157 BBL/mo

Di (annual)

481.0%

b-factor

0.4

EUR

625 BBL

R-squared

0.615

type

hyperbolic

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2COSTILLA ENERGY, INC.110,5001997-02-14
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