How much Gulf of America oil output has Hurricane Isaias shut in?

It depends on the source and date. Rigzone relayed a Marine Minerals Administration estimate of about 71.51% of oil output as of 11 a.m. CDT on 9 October 2026. The U.S. Energy Information Administration cited about 1.3 million barrels per day shut in as of 8 October.

Why do the shut-in figures differ?

They are dated a day apart and are expressed differently: a percentage of output in one case, absolute volumes in the other. The sources reviewed do not state the base used for the percentage, so the two are not directly comparable.

Does this mean lasting damage to Gulf output?

Not on current evidence. The sources describe precautionary shut-ins and evacuations and report no damage assessment. Restart timing has not been confirmed. This is analysis, not trading advice.

Isaias Shut-Ins Hit Gulf Oil, but Counts Differ

Agency estimates put Gulf of America oil shut-ins from Isaias at 1.3 million b/d on 8 Oct; Rigzone cites 71.5% on 9 Oct. Damage is unreported.

Hurricane Isaias has shut in a large share of Gulf of America offshore output, but sources measure it differently. The Marine Minerals Administration estimate relayed by Rigzone put oil at 71.51% on 9 October; the U.S. Energy Information Administration cited about 1.3 million barrels per day on 8 October. Damage and restart timing remain unconfirmed.

The Gulf Barrel Desk October 11, 2026 Updated October 11, 2026 · 3 min read

Per Rigzone's 9 October 2026 report, the Marine Minerals Administration estimated about 71.51% of Gulf oil output and 58.84% of gas output was shut in as of 11 a.m. CDT that day.
The U.S. Energy Information Administration, citing the same agency, reported 130 platforms and rigs evacuated or moved and about 1.3 million b/d of crude and 1.1 Bcf/d of gas shut in as of 8 October.
The two sets of figures differ in date and presentation (a percentage against an absolute volume), so they should not be treated as one series.
Rigzone reported 129 platforms evacuated, 34.77% of the 371 manned platforms, and no platform damage assessment.
Restart timing is unconfirmed; it depends on post-storm inspections that the sources do not report.

Hurricane Isaias has forced a large precautionary shut-in of Gulf of America output, but the published counts do not line up. Rigzone's 9 October 2026 report relays a Marine Minerals Administration estimate that roughly seven in ten barrels of daily oil production were offline. The U.S. Energy Information Administration, a day earlier, gave an absolute figure of about 1.3 million barrels per day. These are agency estimates from operator reports, not metered volumes, and the reporting here is as of 8 and 9 October only.

What Rigzone reported on 9 October

Rigzone, relaying Marine Minerals Administration data, reported that about 71.51% of daily oil production and 58.84% of daily natural gas production was shut in as of 11 a.m. CDT on 9 October 2026. It said 129 production platforms, or 34.77% of the 371 manned platforms, had been evacuated, along with 8 of the 11 operating non-dynamically positioned rigs. Rigzone also reported Isaias at Category 3 with 120 mph winds per the National Hurricane Center.

What the EIA reported a day earlier

The U.S. Energy Information Administration, in a Today in Energy note citing the Marine Minerals Administration, reported 130 production platforms and rigs evacuated or moved as of 8 October 2026. That shut in about 1.3 million barrels per day of crude oil and 1.1 billion cubic feet per day of natural gas. This is an absolute volume, which is the more useful unit for measuring supply impact than a percentage whose base the sources do not specify.

Why the numbers should not be merged

The two readings differ in date, in unit and in platform count, so they describe the same event at different moments rather than one confirmed series. Shut-ins typically expand as a storm approaches, which could explain the higher percentage on 9 October, but neither source states that, and the sources reviewed do not convert the percentage into barrels. Treat both as estimates and look for the agency's later updates.

What remains unconfirmed

The sources describe precautionary shut-ins and evacuations and report no platform damage assessment. How quickly production returns depends on post-storm inspections of facilities and export infrastructure, and no restart timeline appears in the material reviewed. Earth Science Associates' GOMsmart model, as relayed by Rigzone, projected a mean loss of 7.23 million barrels of oil on 9 October, down from 11.17 million projected on 7 October; that is a modelled estimate, not an outcome. This is analysis, not trading advice.

How much Gulf of America oil output has Hurricane Isaias shut in?: It depends on the source and date. Rigzone relayed a Marine Minerals Administration estimate of about 71.51% of oil output as of 11 a.m. CDT on 9 October 2026. The U.S. Energy Information Administration cited about 1.3 million barrels per day shut in as of 8 October.
Why do the shut-in figures differ?: They are dated a day apart and are expressed differently: a percentage of output in one case, absolute volumes in the other. The sources reviewed do not state the base used for the percentage, so the two are not directly comparable.
Does this mean lasting damage to Gulf output?: Not on current evidence. The sources describe precautionary shut-ins and evacuations and report no damage assessment. Restart timing has not been confirmed. This is analysis, not trading advice.

129 Gulf Platforms Evacuated as Isaias Gets Stronger — Rigzone
Today in Energy: Gulf of America hurricane shut-ins — U.S. Energy Information Administration