NAIL -33-

Oil · District 10 · Lease #29780

Operator: VENCER ENERGY, LLC

Cum Oil

286k BBL

Cum Gas

0 MCF

Wells

7

Production

1993-01 — 2026-03

Peak Month

1997-01

Production History

Cum Oil: 285,851 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

1,477 BBL/mo

Di (annual)

6.8%

b-factor

0.0

EUR

250,684 BBL

R-squared

0.792

type

exponential

Wells (7)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
8CONCHO RESOURCES INC.19,5001999-05-05
7COSTILLA PETROLEUM CORPORATION110,0001996-10-15
4COSTEX RESOURCES, INC.19,7001985-12-06
3COSTEX RESOURCES, INC.19,7501985-09-24
6COSTEX RESOURCES, INC.19,7501985-09-24
5XCOSTEX RESOURCES, INC.19,7001985-02-21
1COSTEX RESOURCES, INC.19,7001985-01-08
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