WITTE-SPAHN-MILLER SA

Oil · District 02 · Lease #11946

Operator: MARATHON OIL EF LLC

Cum Oil

573k BBL

Cum Gas

991k MCF

casinghead

Wells

1

Production

2020-02 — 2026-02

Peak Month

2020-04

Production History

Cum Oil: 573,450 BBL Cum Gas: 991,226 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

42,535 BBL/mo

Di (annual)

98.1%

b-factor

0.1

EUR

578,096 BBL

R-squared

0.946

type

hyperbolic

Operator History (from monthly production reports)

2020-02 — 2026-07 MARATHON OIL EF LLC 78 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1HMARATHON OIL EF LLC122,0002020-01-15