HALL-MANNING SA9

Oil · District 01 · Lease #20571

Operator: MARATHON OIL EF LLC

Cum Oil

265k BBL

Cum Gas

262k MCF

casinghead

Wells

1

Production

2022-02 — 2026-04

Peak Month

2022-04

Production History

Cum Oil: 265,017 BBL Cum Gas: 261,921 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

24,094 BBL/mo

Di (annual)

116.4%

b-factor

0.0

EUR

248,482 BBL

R-squared

0.766

type

exponential

Operator History (from monthly production reports)

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

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
9HMARATHON OIL EF LLC125,0002021-12-13