HALL-MANNING SA8

Oil · District 01 · Lease #20558

Operator: MARATHON OIL EF LLC

Cum Oil

250k BBL

Cum Gas

253k MCF

casinghead

Wells

1

Production

2022-02 — 2026-04

Peak Month

2022-04

Production History

Cum Oil: 250,220 BBL Cum Gas: 253,058 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

33,109 BBL/mo

Di (annual)

432.3%

b-factor

0.7

EUR

271,781 BBL

R-squared

0.951

type

hyperbolic

Operator History (from monthly production reports)

2022-02 — 2026-07 MARATHON OIL EF LLC 54 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
8HMARATHON OIL EF LLC125,0002021-12-13