GROSS-ROBERT PSA

Oil · District 02 · Lease #11840

Operator: MARATHON OIL EF LLC

Cum Oil

357k BBL

Cum Gas

1.8M MCF

casinghead

Wells

1

Production

2019-09 — 2026-04

Peak Month

2020-01

Production History

Cum Oil: 356,980 BBL Cum Gas: 1,833,448 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

26,961 BBL/mo

Di (annual)

419.9%

b-factor

0.9

EUR

341,153 BBL

R-squared

0.863

type

hyperbolic

Operator History (from monthly production reports)

2019-09 — 2026-07 MARATHON OIL EF LLC 83 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1HMARATHON OIL EF LLC122,0002019-06-19