SANDEFUR "A"

Oil // district 10 // lease#32967

op: 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
EOF // data source: Texas Railroad Commission // 2026