STEWART-HENKE UNIT

Oil · District 01 · Lease #16385

Operator: MARATHON OIL EF LLC

Cum Oil

125k BBL

Cum Gas

150k MCF

casinghead

Wells

1

Production

2012-11 — 2026-04

Peak Month

2012-12

Production History

Cum Oil: 124,816 BBL Cum Gas: 150,369 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

7,696 BBL/mo

Di (annual)

158.1%

b-factor

0.6

EUR

135,100 BBL

R-squared

0.807

type

hyperbolic

Operator History (from monthly production reports)

2012-11 — 2026-07 MARATHON OIL EF LLC 165 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1HMARATHON OIL EF LLC114,5002012-08-28