HIERHOLZER-HEDTKE UNIT

Oil · District 2 · Lease #10307

Operator: MARATHON OIL EF LLC

Cum Oil

658k BBL

Cum Gas

0 MCF

Wells

3

Production

2012-09 — 2026-03

Peak Month

2012-10

Production History

Cum Oil: 658,281 BBL Cum Gas: 0 MCF

Decline Curve Analysis

qi

15,514 BBL/mo

Di (annual)

62.7%

b-factor

0.7

EUR

731,781 BBL

R-squared

0.623

type

hyperbolic

Wells (3)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2HMARATHON OIL EF LLC117,5002013-04-23
3HMARATHON OIL EF LLC117,5002013-04-23
1HMARATHON OIL EF LLC117,5002012-06-14
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