BARNHART (EF)-J.M. PRESTON SA6

Oil · District 02 · Lease #13129

Operator: MARATHON OIL EF LLC

Cum Oil

66k BBL

Cum Gas

38k MCF

casinghead

Wells

1

Production

2025-04 — 2026-04

Peak Month

2025-10

Production History

Cum Oil: 65,798 BBL Cum Gas: 38,101 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

19,563 BBL/mo

Di (annual)

558.7%

b-factor

0.0

EUR

42,777 BBL

R-squared

0.710

type

exponential

Operator History (from monthly production reports)

2025-04 — 2026-07 MARATHON OIL EF LLC 16 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
123HMARATHON OIL EF LLC122,0002024-12-09