BARNHART (EF) C-E SA 3

Oil · District 01 · Lease #20415

Operator: MARATHON OIL EF LLC

Cum Oil

483k BBL

Cum Gas

1.1M MCF

casinghead

Wells

1

Production

2021-04 — 2026-04

Peak Month

2021-07

Production History

Cum Oil: 483,456 BBL Cum Gas: 1,099,520 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

59,009 BBL/mo

Di (annual)

253.2%

b-factor

0.5

EUR

551,726 BBL

R-squared

0.943

type

hyperbolic

Operator History (from monthly production reports)

2021-04 — 2026-07 MARATHON OIL EF LLC 64 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3HMARATHON OIL EF LLC122,0002021-02-10