ROBERTSON -A-

Oil · District 10 · Lease #30850

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

24k BBL

Cum Gas

0 MCF

Wells

1

Production

1993-01 — 2009-10

Peak Month

1993-05

Production History

Cum Oil: 24,004 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

179 BBL/mo

Di (annual)

5.3%

b-factor

0.0

EUR

37,901 BBL

R-squared

0.809

type

exponential

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1PARKER & PARSLEY PETROLEUM CO.19,4751986-06-19
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