TEXAS TEN -D-

Oil · District 10 · Lease #31234

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

36k BBL

Cum Gas

0 MCF

Wells

1

Production

1993-01 — 2011-12

Peak Month

1999-12

Production History

Cum Oil: 35,625 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

261 BBL/mo

Di (annual)

10.6%

b-factor

0.0

EUR

29,424 BBL

R-squared

0.449

type

exponential

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1PARKER & PARSLEY PETROLEUM CO.311,6001987-05-04
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