HALFMANN LEASE 21

Oil · District 08 · Lease #40338

Operator: ATROPOS EXPLORATION COMPANY

Cum Oil

56k BBL

Cum Gas

96k MCF

casinghead

Wells

1

Production

2010-03 — 2026-04

Peak Month

2010-05

Production History

Cum Oil: 56,311 BBL Cum Gas: 96,136 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

528 BBL/mo

Di (annual)

9.9%

b-factor

0.0

EUR

63,690 BBL

R-squared

0.365

type

exponential

Operator History (from monthly production reports)

2010-03 — 2026-07 ATROPOS EXPLORATION COMPANY 197 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1ATROPOS EXPLORATION COMPANY28,7002009-10-27