STEWART-GIESE UNIT

Oil · District 01 · Lease #15600

Operator: MARATHON OIL EF LLC

Cum Oil

106k BBL

Cum Gas

140k MCF

casinghead

Wells

1

Production

2011-09 — 2025-08

Peak Month

2012-01

Production History

Cum Oil: 106,014 BBL Cum Gas: 140,118 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

1,865 BBL/mo

Di (annual)

155.8%

b-factor

1.2

EUR

81,473 BBL

R-squared

0.369

type

hyperbolic

Operator History (from monthly production reports)

2011-11 — 2026-07 MARATHON OIL EF LLC 177 mo
2011-09 — 2011-10 HILCORP ENERGY COMPANY 2 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1HMARATHON OIL EF LLC113,5002011-07-22