BLACKARD "A"

Oil // district 11 // lease#65621

op: MARSHALL & WINSTON, INC.

cum_oil

155k BBL

cum_gas

0 MCF

wells

1

production

1993-01 — 2026-03

peak_month

2004-08

-- production_history

cum_oil: 154,966 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

736 BBL/mo

Di (annual)

8.9%

b-factor

0.7

EUR

150,004 BBL

R-squared

0.608

type

hyperbolic

-- wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2MARSHALL & WINSTON, INC.410,0002004-04-23
EOF // data source: Texas Railroad Commission // 2026