ELSA UNIT

Oil · District 1 · Lease #12847

Operator: WILLIS DRILLING CO., INC.

Cum Oil

55k BBL

Cum Gas

0 MCF

Wells

1

Production

1993-01 — 1999-11

Peak Month

1993-01

Production History

Cum Oil: 55,477 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

1,855 BBL/mo

Di (annual)

45.5%

b-factor

0.4

EUR

78,962 BBL

R-squared

0.907

type

hyperbolic

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1HTUSKAR (TEXAS), INC.210,2002007-03-27
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