BARNHART (EF) H

Oil · District 01 · Lease #16813

Operator: MARATHON OIL EF LLC

Cum Oil

555k BBL

Cum Gas

375k MCF

casinghead

Wells

2

Production

2013-04 — 2026-04

Peak Month

2025-03

Production History

Cum Oil: 554,681 BBL Cum Gas: 375,122 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

27,130 BBL/mo

Di (annual)

195.4%

b-factor

0.0

EUR

166,973 BBL

R-squared

0.963

type

exponential

Operator History (from monthly production reports)

2013-04 — 2026-07 MARATHON OIL EF LLC 160 mo

Wells (2)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
5HMARATHON OIL EF LLC122,0002024-04-25
1HMARATHON OIL EF LLC118,5002013-02-13