GRIFFIN-DEATLEY UNIT A

Oil · District 01 · Lease #15690

Operator: MARATHON OIL EF LLC

Cum Oil

120k BBL

Cum Gas

367k MCF

casinghead

Wells

1

Production

2011-09 — 2025-06

Peak Month

2025-05

Production History

Cum Oil: 119,997 BBL Cum Gas: 367,176 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

5,328 BBL/mo

Di (annual)

165.4%

b-factor

0.8

EUR

125,836 BBL

R-squared

0.823

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 LLC113,5002011-07-11