HALL-MANNING SA3

Oil · District 01 · Lease #20556

Operator: MARATHON OIL EF LLC

Cum Oil

312k BBL

Cum Gas

274k MCF

casinghead

Wells

1

Production

2022-01 — 2026-04

Peak Month

2022-04

Production History

Cum Oil: 311,816 BBL Cum Gas: 274,389 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

37,242 BBL/mo

Di (annual)

763.2%

b-factor

1.2

EUR

522,249 BBL

R-squared

0.913

type

hyperbolic

Operator History (from monthly production reports)

2022-01 — 2026-07 MARATHON OIL EF LLC 55 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3HMARATHON OIL EF LLC124,0002021-12-13