BARNHART (EF)-J.M. PRESTON SA3

Oil · District 02 · Lease #12714

Operator: MARATHON OIL EF LLC

Cum Oil

324k BBL

Cum Gas

205k MCF

casinghead

Wells

1

Production

2023-10 — 2026-04

Peak Month

2023-11

Production History

Cum Oil: 323,573 BBL Cum Gas: 204,885 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

20,043 BBL/mo

Di (annual)

88.3%

b-factor

0.0

EUR

272,470 BBL

R-squared

0.615

type

exponential

Operator History (from monthly production reports)

2023-10 — 2026-07 MARATHON OIL EF LLC 34 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
119HMARATHON OIL EF LLC224,0002023-12-11