STATE TRACT 470

Oil // district 4 // lease#12491

op: CHAPARRAL (USA) ENERGY, INC.

cum_oil

151k BBL

cum_gas

0 MCF

wells

1

production

1995-08 — 2013-07

peak_month

1996-06

-- production_history

cum_oil: 150,855 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

2,493 BBL/mo

Di (annual)

18.9%

b-factor

0.0

EUR

158,011 BBL

R-squared

0.722

type

exponential

-- wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
7BRISTOL RESOURCES CORPORATION69,7071993-12-14
EOF // data source: Texas Railroad Commission // 2026