BARNHART (EF)-J.M. PRESTON SA10

Oil · District 02 · Lease #13131

Operator: MARATHON OIL EF LLC

Cum Oil

80k BBL

Cum Gas

44k MCF

casinghead

Wells

1

Production

2025-03 — 2026-04

Peak Month

2025-10

Production History

Cum Oil: 79,745 BBL Cum Gas: 44,405 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

16,381 BBL/mo

Di (annual)

333.2%

b-factor

0.0

EUR

59,372 BBL

R-squared

0.325

type

exponential

Operator History (from monthly production reports)

2025-03 — 2026-07 MARATHON OIL EF LLC 17 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
125HMARATHON OIL EF LLC122,0002024-12-09