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World faces largest-ever oil supply disruption on Middle East war, IEA says

Published by Global Banking & Finance Review

Posted on March 12, 2026

4 min read

· Last updated: April 1, 2026

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World faces largest-ever oil supply disruption on Middle East war, IEA says
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By Alex Lawler LONDON, March 12 (Reuters) - The war in the Middle East is creating the biggest oil supply disruption in history, the International Energy Agency said on Thursday, a day after it agreed

World faces largest-ever oil supply disruption on Middle East war, IEA says

IEA Reports Historic Oil Supply Disruption Amid Middle East Conflict

By Alex Lawler

LONDON, March 12 (Reuters) - The war in the Middle East is creating the biggest oil supply disruption in history, the International Energy Agency said on Thursday, a day after it agreed to release a record volume from strategic stockpiles to offset shortages and a spike in prices.

Global Oil Supply Impact and IEA's Response

Global supply is expected to drop by 8 million barrels per day in March, the IEA said in its latest monthly oil market report - a volume equal to almost 8% of world demand - due to the blocking of the Strait of Hormuz, a narrow channel along the Iranian coast, since the U.S. and Israel began airstrikes on Iran on February 28. 

The outlook from the IEA, which advises industrialised countries, contrasts with its earlier warnings of a sizeable surplus on the market for the first quarter of 2026.

It added, however, that supply could rise in April as some Middle East Gulf producers use alternative export routes to bypass the Strait of Hormuz, and said that, for the year, production would still expand more quickly than global demand.

Gulf Production and Regional Impact

GULF PRODUCTION SLASHED AMID CONFLICT

Oil prices rose on Thursday, as Iran stepped up attacks on oil and transport facilities across the Middle East, raising fears of a prolonged conflict and continued oil-flow disruptions through the Strait. [O/R]

Brent crude, which hit $119.50 a barrel on Monday, its highest since mid-2022, was up 5% on Thursday at just below $97 a barrel.

Middle East Gulf countries including Iraq, Qatar, Kuwait, the United Arab Emirates and Saudi Arabia have cut total oil production by at least 10 million barrels per day as a result of the conflict, the IEA said, adding that without a rapid restart of shipping flows these losses were set to increase. 

"Shut-in upstream production will take weeks and, in some cases, months to return to pre-crisis levels depending on the degree of field complexity and the timing for workers, equipment and resources to return to the region," the agency said.

Market Reactions and Strategic Stockpile Release

MARKETS ARE IN CRITICAL PERIOD

The IEA on Wednesday agreed to release a record 400 million barrels of oil from strategic stockpiles held by member nations to combat a spike in prices since the start of the war on Iran.

IEA Executive Director Fatih Birol, speaking in Istanbul, said the agency's decision had already had a "strong impact" on energy markets, which were in an "extremely critical period." He declined to respond to a question on the daily pace of release from stockpiles.

The Middle East crisis was also curbing oil demand as airlines cancel flights, the IEA said, while a more precarious economic outlook and higher prices were posing a risk to the demand forecast.

World demand was expected to be around 1 million bpd lower than earlier estimates during March and April, the IEA said. For the year, world demand in 2026 was expected to rise by 640,000 bpd, down 210,000 bpd from the previous forecast, and about half the rate forecast by producer group OPEC on Wednesday.

Future Outlook for Oil Supply and Demand

WORLD SUPPLY STILL EXPECTED TO RISE IN 2026

Despite the cuts in March production, the agency still expected oil supply to rise faster than world demand, on average, in 2026.

World supply would rise by 1.1 million bpd, the IEA said, down from 2.4 million bpd expected last month.

Overall, the IEA forecasts imply that supply will be higher than demand by 2.46 million bpd in 2026, a reduction from a 3.73 million bpd surplus in last month's report.

Alternative Export Routes and Mitigation Efforts

Efforts by Saudi Arabia and the UAE to use export routes that bypass the Strait of Hormuz were steadily ramping up, the IEA said, and were among plans that could help partially offset losses and provide a rise in global oil supplies from April through June.

(Reporting by Alex Lawler; additional reporting by Ezgi Erkoyun. Editing by Alex Richardson)

Key Takeaways

  • IEA forecasts a staggering 8 million barrels per day shortfall in global oil supply for March due to the Strait of Hormuz blockade and Gulf producers shutting in roughly 10 million bpd, nearly 10% of world demand. (iea.org)
  • In response, the IEA’s 32 member countries agreed on March 11, 2026, to release a record 400 million barrels from emergency reserves—the largest coordinated release in its history. (iea.org)
  • The U.S. will contribute heavily—around 172 million barrels over approximately 120 days—while other nations like Japan and European countries also pledge their share. (axios.com)

References

Frequently Asked Questions

How much has global oil supply dropped due to the Middle East war?
The IEA reports global oil supply is expected to drop by 8 million barrels per day in March due to the conflict.
What is causing the current oil supply disruption?
The supply disruption is caused by the blocking of the Strait of Hormuz after U.S. and Israeli airstrikes on Iran and production cuts by Middle East Gulf countries.
How are countries responding to the spike in oil prices?
IEA member nations agreed to release a record 400 million barrels of oil from strategic reserves, with the U.S. contributing the bulk.
Which Middle East countries have cut oil production?
Iraq, Qatar, Kuwait, the United Arab Emirates, and Saudi Arabia have cut oil production by at least 10 million barrels per day.
What has happened to oil prices since the conflict began?
Oil prices rose sharply, with Brent crude reaching $119.50 a barrel, its highest since mid-2022, before settling just below $98.

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