74-ATASCOSA SA 1

Oil · District 01 · Lease #20419

Operator: MARATHON OIL EF LLC

Cum Oil

356k BBL

Cum Gas

473k MCF

casinghead

Wells

1

Production

2021-04 — 2026-04

Peak Month

2021-08

Production History

Cum Oil: 355,699 BBL Cum Gas: 473,117 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

30,783 BBL/mo

Di (annual)

370.0%

b-factor

1.0

EUR

522,504 BBL

R-squared

0.913

type

hyperbolic

Operator History (from monthly production reports)

2021-04 — 2026-07 MARATHON OIL EF LLC 64 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1HMARATHON OIL EF LLC122,0002021-01-15