GUAJILLO UNIT 9 SOUTH

Oil · District 02 · Lease #11231

Operator: MARATHON OIL EF LLC

Cum Oil

984k BBL

Cum Gas

1.4M MCF

casinghead

Wells

4

Production

2015-12 — 2026-04

Peak Month

2016-01

Production History

Cum Oil: 983,818 BBL Cum Gas: 1,351,371 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

77,985 BBL/mo

Di (annual)

317.5%

b-factor

0.7

EUR

854,144 BBL

R-squared

0.910

type

hyperbolic

Operator History (from monthly production reports)

2015-12 — 2026-07 MARATHON OIL EF LLC 128 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1HMARATHON OIL EF LLC120,0002015-08-27
2HMARATHON OIL EF LLC120,0002015-08-27
3HMARATHON OIL EF LLC120,0002015-08-27
4HMARATHON OIL EF LLC120,0002015-08-27