SPRENCEL-PECK UNIT

Oil · District 02 · Lease #9900

Operator: MARATHON OIL EF LLC

Cum Oil

1.4M BBL

Cum Gas

1.8M MCF

casinghead

Wells

7

Production

2012-01 — 2026-04

Peak Month

2014-05

Production History

Cum Oil: 1,437,007 BBL Cum Gas: 1,781,869 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

88,557 BBL/mo

Di (annual)

190.7%

b-factor

0.7

EUR

1,553,971 BBL

R-squared

0.872

type

hyperbolic

Operator History (from monthly production reports)

2012-01 — 2026-07 MARATHON OIL EF LLC 175 mo

Wells (7)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3HMARATHON OIL EF LLC217,6002026-10-08
6HMARATHON OIL EF LLC117,0002014-05-03
7HMARATHON OIL EF LLC117,0002014-05-03
5HMARATHON OIL EF LLC118,5002014-01-08
4HMARATHON OIL EF LLC118,2002014-01-03
2HMARATHON OIL EF LLC117,6002013-12-27
1HMARATHON OIL EF LLC113,5002011-10-31