HALFMANN 4

Oil // district 10 // lease#28427

op: SUNDOWN ENERGY LP

cum_oil

40k BBL

cum_gas

0 MCF

wells

2

production

1993-01 — 2023-12

peak_month

2009-11

-- production_history

cum_oil: 40,171 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

584 BBL/mo

Di (annual)

36.0%

b-factor

0.0

EUR

19,418 BBL

R-squared

0.428

type

exponential

-- wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1SUNDOWN ENERGY LP210,3002009-09-08
2L & B OIL CO. INC.110,2001983-11-23
EOF // data source: Texas Railroad Commission // 2026