SIEBER

Oil // district 10 // lease#38054

op: MARSHALL & WINSTON, INC.

cum_oil

38k BBL

cum_gas

0 MCF

wells

1

production

2006-12 — 2026-03

peak_month

2007-07

-- production_history

cum_oil: 37,742 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

782 BBL/mo

Di (annual)

65.9%

b-factor

0.8

EUR

40,076 BBL

R-squared

0.751

type

hyperbolic

-- wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1MARSHALL & WINSTON, INC.26,5002006-07-07
EOF // data source: Texas Railroad Commission // 2026