TURNBULL UNIT A E-R. GRANDE SA3

Oil · District 02 · Lease #12687

Operator: MARATHON OIL EF LLC

Cum Oil

174k BBL

Cum Gas

463k MCF

casinghead

Wells

1

Production

2023-08 — 2026-04

Peak Month

2024-03

Production History

Cum Oil: 173,737 BBL Cum Gas: 462,565 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

27,988 BBL/mo

Di (annual)

916.3%

b-factor

1.3

EUR

413,482 BBL

R-squared

0.957

type

hyperbolic

Operator History (from monthly production reports)

2023-08 — 2026-07 MARATHON OIL EF LLC 36 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
3HMARATHON OIL EF LLC124,0002023-05-26