SANDEFUR "A"

Oil · District 10 · Lease #32967

Operator: SOUTHWEST ROYALTIES, INC.

Cum Oil

8k BBL

Cum Gas

0 MCF

Wells

1

Production

1993-01 — 2007-11

Peak Month

1993-01

Production History

Cum Oil: 7,670 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

100 BBL/mo

Di (annual)

13.1%

b-factor

0.0

EUR

9,067 BBL

R-squared

0.895

type

exponential

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1SOUTHWEST ROYALTIES, INC.312,0002010-03-18
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