DUFFER 'C'

Oil // district 8 // lease#29698

op: GEOSURVEYS, INC.

cum_oil

1k BBL

cum_gas

0 MCF

wells

1

production

2006-03 — 2026-03

peak_month

2006-08

-- production_history

cum_oil: 1,190 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

26 BBL/mo

Di (annual)

130.9%

b-factor

1.0

EUR

759 BBL

R-squared

0.370

type

hyperbolic

-- wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1GEOSURVEYS, INC.34,5002005-05-26
EOF // data source: Texas Railroad Commission // 2026