4K BLACK HILLS UNIT B

Oil // district 1 // lease#21646

op: PILLAR EFS, LLC

cum_oil

137k BBL

cum_gas

0 MCF

wells

2

production

2024-12 — 2026-03

peak_month

2024-12

-- production_history

cum_oil: 136,766 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

24,798 BBL/mo

Di (annual)

476.2%

b-factor

1.2

EUR

490,694 BBL

R-squared

0.918

type

hyperbolic

-- wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1HPILLAR EFS, LLC29,0002023-08-30
2HPILLAR EFS, LLC29,0002023-08-29
EOF // data source: Texas Railroad Commission // 2026