74-ATASCOSA SA 2

Oil · District 01 · Lease #20398

Operator: MARATHON OIL EF LLC

Cum Oil

276k BBL

Cum Gas

417k MCF

casinghead

Wells

1

Production

2021-03 — 2026-04

Peak Month

2021-08

Production History

Cum Oil: 276,079 BBL Cum Gas: 417,439 MCF

RRC production reported through Apr 2026 · recent months incomplete

Decline Curve Analysis

qi

19,421 BBL/mo

Di (annual)

488.6%

b-factor

1.3

EUR

442,893 BBL

R-squared

0.748

type

hyperbolic

Operator History (from monthly production reports)

2021-03 — 2026-07 MARATHON OIL EF LLC 65 mo

Wells (1)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
2HMARATHON OIL EF LLC122,0002021-01-15