GUAJILLO UNIT 12 NORTH

Oil · District 02 · Lease #11331

Operator: MARATHON OIL EF LLC

Cum Oil

1.0M BBL

Cum Gas

1.3M MCF

casinghead

Wells

4

Production

2017-03 — 2026-04

Peak Month

2017-04

Production History

Cum Oil: 1,000,825 BBL Cum Gas: 1,256,302 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

113,807 BBL/mo

Di (annual)

330.5%

b-factor

0.7

EUR

1,200,784 BBL

R-squared

0.954

type

hyperbolic

Operator History (from monthly production reports)

2017-03 — 2026-07 MARATHON OIL EF LLC 113 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1HMARATHON OIL EF LLC117,8002016-10-07
2HMARATHON OIL EF LLC117,8002016-10-07
3HMARATHON OIL EF LLC117,8002016-10-07
4HMARATHON OIL EF LLC117,8002016-10-07