HENKE UNIT B

Oil · District 01 · Lease #15598

Operator: MARATHON OIL EF LLC

Cum Oil

919k BBL

Cum Gas

1.5M MCF

casinghead

Wells

4

Production

2011-05 — 2026-04

Peak Month

2018-03

Production History

Cum Oil: 919,412 BBL Cum Gas: 1,490,481 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

66,835 BBL/mo

Di (annual)

167.6%

b-factor

0.4

EUR

794,452 BBL

R-squared

0.840

type

hyperbolic

Operator History (from monthly production reports)

2011-11 — 2026-07 MARATHON OIL EF LLC 177 mo
2011-05 — 2011-10 HILCORP ENERGY COMPANY 6 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
4HMARATHON OIL EF LLC116,7002017-09-06
5HMARATHON OIL EF LLC116,7002017-09-06
6HMARATHON OIL EF LLC116,7002017-09-06
1HMARATHON OIL EF LLC113,5002011-02-21