BARNHART (EF) C-E SA 1

Oil · District 01 · Lease #20395

Operator: MARATHON OIL EF LLC

Cum Oil

339k BBL

Cum Gas

622k MCF

casinghead

Wells

1

Production

2021-03 — 2026-04

Peak Month

2021-07

Production History

Cum Oil: 338,862 BBL Cum Gas: 621,508 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

11,482 BBL/mo

Di (annual)

58.0%

b-factor

0.0

EUR

237,650 BBL

R-squared

0.406

type

exponential

Operator History (from monthly production reports)

2021-03 — 2026-07 MARATHON OIL EF LLC 65 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1HMARATHON OIL EF LLC122,0002021-02-23