WELCH & WELCH

Oil · District 10 · Lease #21859

Operator: PIONEER NATURAL RES. USA, INC.

Cum Oil

33k BBL

Cum Gas

0 MCF

Wells

2

Production

1993-01 — 2013-05

Peak Month

1993-01

Production History

Cum Oil: 32,650 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

372 BBL/mo

Di (annual)

12.5%

b-factor

0.0

EUR

35,581 BBL

R-squared

0.648

type

exponential

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2BROWN, TOM INC.19,4251985-09-27
142-317-30119--------
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