ZINN & FORMAN

Oil // district 3 // lease#21402

op: VAST OIL TX OPERATING LLC

cum_oil

67k BBL

cum_gas

0 MCF

wells

1

production

1993-01 — 2026-03

peak_month

1998-01

-- production_history

cum_oil: 66,643 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

1,540 BBL/mo

Di (annual)

75.6%

b-factor

0.7

EUR

61,767 BBL

R-squared

0.743

type

hyperbolic

-- wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
19SUN EXPL. & PROD. CO.-LAFAYETTE611,0001991-12-18
EOF // data source: Texas Railroad Commission // 2026