COX "B"

Oil · District 10 · Lease #35401

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

14k BBL

Cum Gas

0 MCF

Wells

1

Production

1997-07 — 2012-02

Peak Month

1997-07

Production History

Cum Oil: 14,125 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

1,776 BBL/mo

Di (annual)

173.9%

b-factor

0.2

EUR

15,302 BBL

R-squared

0.745

type

hyperbolic

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3PARKER & PARSLEY DEVELOPMENT L.P17,0051997-07-03
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