BARNHART (EF)-J.M. PRESTON SA7

Oil · District 01 · Lease #21158

Operator: MARATHON OIL EF LLC

Cum Oil

170k BBL

Cum Gas

252k MCF

casinghead

Wells

1

Production

2023-08 — 2026-04

Peak Month

2023-08

Production History

Cum Oil: 170,478 BBL Cum Gas: 252,083 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

23,029 BBL/mo

Di (annual)

231.1%

b-factor

0.3

EUR

171,038 BBL

R-squared

0.902

type

hyperbolic

Operator History (from monthly production reports)

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

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
45HMARATHON OIL EF LLC126,0002023-03-09