ROBERSON

Oil · District 10 · Lease #28513

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

10k BBL

Cum Gas

0 MCF

Wells

1

Production

1993-01 — 2003-10

Peak Month

1996-09

Production History

Cum Oil: 10,142 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

247 BBL/mo

Di (annual)

67.0%

b-factor

2.0

EUR

32,008 BBL

R-squared

0.504

type

hyperbolic

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1PARKER & PARSLEY, INC.19,4501983-09-19
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