ESSE-SMITH RANCH UNIT B

Oil · District 01 · Lease #15670

Operator: MARATHON OIL EF LLC

Cum Oil

1.0M BBL

Cum Gas

1.5M MCF

casinghead

Wells

5

Production

2011-08 — 2026-04

Peak Month

2013-10

Production History

Cum Oil: 1,048,670 BBL Cum Gas: 1,476,194 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

32,531 BBL/mo

Di (annual)

49.9%

b-factor

0.1

EUR

869,868 BBL

R-squared

0.689

type

hyperbolic

Operator History (from monthly production reports)

2011-11 — 2026-07 MARATHON OIL EF LLC 177 mo
2011-08 — 2011-10 HILCORP ENERGY COMPANY 3 mo

Wells (5)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2HMARATHON OIL EF LLC117,5002013-05-14
3HMARATHON OIL EF LLC117,5002013-05-14
4HMARATHON OIL EF LLC117,5002013-05-14
5HMARATHON OIL EF LLC117,5002013-05-14
1HMARATHON OIL EF LLC213,5002011-04-21