BARNHART (EF)-J.M. PRESTON SA9

Oil · District 01 · Lease #21156

Operator: MARATHON OIL EF LLC

Cum Oil

155k BBL

Cum Gas

198k MCF

casinghead

Wells

1

Production

2023-08 — 2026-04

Peak Month

2023-08

Production History

Cum Oil: 155,468 BBL Cum Gas: 198,395 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

22,150 BBL/mo

Di (annual)

489.7%

b-factor

0.9

EUR

245,628 BBL

R-squared

0.942

type

hyperbolic

Operator History (from monthly production reports)

2023-08 — 2026-07 MARATHON OIL EF LLC 36 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
47HMARATHON OIL EF LLC126,0002023-03-09