POWELL -12-

Oil // district 10 // lease#36199

op: SOUTHWEST ROYALTIES, INC.

cum_oil

125k BBL

cum_gas

0 MCF

wells

4

production

2000-02 — 2026-03

peak_month

2001-04

-- production_history

cum_oil: 125,446 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

2,881 BBL/mo

Di (annual)

46.0%

b-factor

0.4

EUR

121,349 BBL

R-squared

0.874

type

hyperbolic

-- wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4SOUTHWEST ROYALTIES, INC.17,9002001-02-20
3SOUTHWEST ROYALTIES, INC.17,9002001-01-18
2MILTEX OIL COMPANY17,9001999-05-05
1MILTEX OIL COMPANY17,9001998-08-04
EOF // data source: Texas Railroad Commission // 2026