DEMING-HERBERN SA1

Oil · District 02 · Lease #12918

Operator: MARATHON OIL EF LLC

Cum Oil

184k BBL

Cum Gas

2.0M MCF

casinghead

Wells

1

Production

2024-09 — 2026-04

Peak Month

2024-10

Production History

Cum Oil: 183,585 BBL Cum Gas: 1,976,905 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

25,202 BBL/mo

Di (annual)

284.9%

b-factor

0.5

EUR

209,881 BBL

R-squared

0.986

type

hyperbolic

Operator History (from monthly production reports)

2024-09 — 2026-07 MARATHON OIL EF LLC 23 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1HMARATHON OIL EF LLC122,0002024-05-09