GRIFFIN-DEATLEY UNIT B

Oil · District 01 · Lease #15606

Operator: MARATHON OIL EF LLC

Cum Oil

110k BBL

Cum Gas

172k MCF

casinghead

Wells

1

Production

2011-09 — 2026-03

Peak Month

2011-11

Production History

Cum Oil: 109,871 BBL Cum Gas: 172,462 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

4,545 BBL/mo

Di (annual)

78.7%

b-factor

0.4

EUR

113,810 BBL

R-squared

0.761

type

hyperbolic

Operator History (from monthly production reports)

2011-11 — 2026-07 MARATHON OIL EF LLC 177 mo
2011-09 — 2011-10 HILCORP ENERGY COMPANY 2 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1HMARATHON OIL EF LLC113,5002011-07-06