MAUCH UNIT

Oil · District 01 · Lease #15455

Operator: MARATHON OIL EF LLC

Cum Oil

803k BBL

Cum Gas

1.1M MCF

casinghead

Wells

4

Production

2010-12 — 2026-04

Peak Month

2015-03

Production History

Cum Oil: 803,240 BBL Cum Gas: 1,056,240 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

84,113 BBL/mo

Di (annual)

670.2%

b-factor

1.0

EUR

879,961 BBL

R-squared

0.807

type

hyperbolic

Operator History (from monthly production reports)

2011-11 — 2026-07 MARATHON OIL EF LLC 177 mo
2010-12 — 2011-10 HILCORP ENERGY COMPANY 11 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2HMARATHON OIL EF LLC117,7002014-10-10
3HMARATHON OIL EF LLC117,7002014-10-10
4HMARATHON OIL EF LLC117,7002014-10-10
1HMARATHON OIL EF LLC313,5002011-11-30