CALHOUN

Oil · District 13 · Lease #27614

Operator: PRECISION OPERATING INC.

Cum Oil

27k BBL

Cum Gas

0 MCF

Wells

1

Production

1993-01 — 2005-06

Peak Month

1993-03

Production History

Cum Oil: 27,224 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

423 BBL/mo

Di (annual)

21.6%

b-factor

0.4

EUR

35,960 BBL

R-squared

0.817

type

hyperbolic

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1PRECISION OPERATING INC.28,1501989-08-09
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