HALFMANN LEASE 21

Oil // district 10 // lease#40338

op: ATROPOS EXPLORATION COMPANY

cum_oil

56k BBL

cum_gas

0 MCF

wells

1

production

2010-03 — 2026-03

peak_month

2010-03

-- production_history

cum_oil: 55,572 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

539 BBL/mo

Di (annual)

10.3%

b-factor

0.0

EUR

62,636 BBL

R-squared

0.361

type

exponential

-- wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1COSTILLA PETROLEUM CORPORATION28,7002009-10-27
EOF // multi-state drilling data platform // 2026