ARCO DONAHO

Oil // district 3 // lease#18206

op: SUNDOWN ENERGY LP

cum_oil

137k BBL

cum_gas

0 MCF

wells

2

production

1993-01 — 2026-03

peak_month

1995-08

-- production_history

cum_oil: 137,483 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

2,756 BBL/mo

Di (annual)

67.0%

b-factor

0.5

EUR

93,136 BBL

R-squared

0.713

type

hyperbolic

-- wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1WINTERSHALL OIL & GAS COPORATION48,0002010-01-22
1SWELAND ENERGY, INC.15,9001995-10-03
EOF // data source: Texas Railroad Commission // 2026