HIERHOLZER RETZLOFF-MCMAHON SA2

Oil · District 01 · Lease #21772

Operator: MARATHON OIL EF LLC

Cum Oil

287k BBL

Cum Gas

395k MCF

casinghead

Wells

1

Production

2025-03 — 2026-04

Peak Month

2025-03

Production History

Cum Oil: 287,149 BBL Cum Gas: 394,727 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

44,441 BBL/mo

Di (annual)

305.3%

b-factor

1.0

EUR

880,459 BBL

R-squared

0.977

type

hyperbolic

Operator History (from monthly production reports)

2025-03 — 2026-07 MARATHON OIL EF LLC 17 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2HMARATHON OIL EF LLC124,0002024-08-01