SPAHN-MIKKELSON UNIT

Oil · District 02 · Lease #10060

Operator: MARATHON OIL EF LLC

Cum Oil

1.0M BBL

Cum Gas

1.5M MCF

casinghead

Wells

4

Production

2012-05 — 2026-04

Peak Month

2019-11

Production History

Cum Oil: 1,008,794 BBL Cum Gas: 1,491,083 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

61,432 BBL/mo

Di (annual)

331.5%

b-factor

0.8

EUR

786,306 BBL

R-squared

0.851

type

hyperbolic

Operator History (from monthly production reports)

2012-05 — 2026-07 MARATHON OIL EF LLC 171 mo

Wells (4)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3HMARATHON OIL EF LLC122,0002019-03-19
503HMARATHON OIL EF LLC122,0002019-03-18
2HMARATHON OIL EF LLC214,0002013-02-20
1HMARATHON OIL EF LLC114,5002012-03-27