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Oil prices drop as U.S. crude inventories show an increase

Published by Global Banking & Finance Review

Posted on March 18, 2026

4 min read

· Last updated: April 1, 2026

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Oil prices drop as U.S. crude inventories show an increase
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By Sam Li and Lewis Jackson BEIJING, March 18 (Reuters) - Oil prices slightly fell on Wednesday morning after sources citing American Petroleum Institute figures showed an increase in U.S. crude

Oil extends gains to rise 5.6% after Iran attacks Gulf energy facilities

Market Impact and Geopolitical Developments

By Siddharth Cavale

Oil Price Movements and Trading Activity

NEW YORK, March 18 (Reuters) - Oil prices settled higher on Wednesday and climbed further in extended trade after Iran attacked several energy facilities across the Middle East following a strike on its South Pars gas field, a major escalation in its war with the U.S. and Israel.

Brent futures were up 5.6% in post-settlement trading, extending gains after settling up 3.8% at $107.38. U.S. West Texas Intermediate crude extended gains to 4% after closing up 11 cents, or 0.1%, at $96.32.

WTI futures had settled at their widest discount to Brent in 11 years, as the U.S. benchmark was pressured by higher supply through a release from its Strategic Petroleum Reserve and rising freight costs. Brent futures, meanwhile, were buoyed by fresh attacks on Middle Eastern energy facilities. 

Regional Facility Attacks and Responses

Qatar's state oil and gas company said the Ras Laffan Industrial City, an energy-industry hub, had suffered "extensive damage" after it was hit by Iranian missiles. Saudi Arabia said it had intercepted and destroyed multiple ballistic missiles launched toward Riyadh and an attempted drone attack on a gas facility in the east of the country.

Iran has issued an evacuation warning for several energy facilities across Saudi Arabia, the UAE and Qatar, saying they would be targeted by strikes "in the coming hours," Iranian state media reported on Wednesday.

The warning followed an attack on Iran's South Pars gas field, which Israeli media reported was carried out by Israel with U.S. consent. Neither country acknowledged immediate responsibility.

Analyst Insights and Supply Chain Impact

"The attacks on Iran's South Pars field were boosting oil and gas prices, and any further escalations of attacks to energy infrastructure would continue to raise prices," SEB analyst Ole Hvalbye said.

The war has halted shipments via the Strait of Hormuz, which handles 20% of global oil and LNG supply. Total oil output cuts in the Middle East are estimated at 7 million to 10 million barrels per day or 7% to 10% of global demand.   

U.S. Policy Response and Domestic Market Effects

Trump Administration Measures

TRUMP TRIES TO CONTROL RISING U.S. OIL PRICES

U.S. President Donald Trump's administration on Wednesday announced a 60-day waiver of the Jones Act shipping law, temporarily allowing foreign-flagged vessels to move fuel, fertilizer and other goods between U.S. ports.

It will also temporarily lift federal smog-cutting restrictions on summer-blend gasoline, three sources told Reuters, though the moves only marginally impacted gasoline futures contracts.

Market Reaction and Analyst Commentary

Traders and analysts said the measures could help slow the surge in fuel prices in the U.S., but are unlikely to have much of an effect on global energy prices.

Despite the announcements, U.S. diesel futures surged to a nearly $85 per barrel premium to WTI crude, the highest since October 2022.

The U.S. also issued a general license authorizing certain deals involving Venezuela's state oil company PDVSA, while a report said Vice President JD Vance and other key Trump administration officials plan to meet on Thursday with the American Petroleum Institute, the nation’s largest oil trade group.

Global Oil Supply Updates

Iraq and Libya Oil Developments

In Iraq, the North Oil Company said crude exports from Iraq's Kirkuk fields to Turkey's Ceyhan port have resumed via pipeline, after Baghdad and the Kurdistan Regional Government agreed to restart flows on Tuesday. Kirkuk crude exports would resume with an initial capacity of 250,000 bpd, the company said.

Separately, Iraq's state oil company SOMO signed contracts with international carriers and buyers to export crude oil via Turkey, Jordan and Syria, the Iraqi state news agency said on Wednesday.

"Iraq turning the taps back on comes at just the right time, when the world really needs more oil supplies. It also ramps up the pressure on Iran, making it harder for them to use oil as a bargaining chip," said Phil Flynn, senior analyst at Price Futures Group. 

Libya's National Oil Corporation said early on Wednesday that flows from the Sharara oilfield were being gradually redirected through alternative pipelines after a fire broke out.

U.S. Inventory Data

In the U.S., crude stocks rose while gasoline and distillate inventories fell last week, the Energy Information Administration said. Crude inventories rose by 6.2 million barrels to 449.3 million barrels in the week ended March 13, compared with market expectations for a rise of 383,000 barrels.

Reporting Credits

(Reporting by Siddharth Cavale and Shariq Khan in New York, Ahmad Gaddar and Seher Dareen in London, Sam Li in Beijing and Siyi Liu in Singapore; Editing by Bernadette Baum, Jane Merriman, Louise Heavens, Deepa Babington, Nia Williams and David Gregorio)

Key Takeaways

  • U.S. crude stocks surged ~6.56 million barrels versus consensus for only ~380,000 barrels, prompting Brent to fall $1.15 and WTI $1.54 by early GMT on March 18.
  • Iraq and Kurdistan have reached an agreement to restart exports via the Ceyhan pipeline starting March 18, easing long‑standing export bottlenecks.
  • Libya’s Sharara field gradually resumed flows via alternative pipelines after a fire, while Iran‑related geopolitical developments continue to inject volatility into global oil markets.

References

Frequently Asked Questions

Why did oil prices fall on Wednesday?
Oil prices dropped due to an increase in U.S. crude inventories and shifting global supply dynamics.
How much did U.S. crude inventories rise?
U.S. crude inventories rose by 6.56 million barrels in the week ended March 13.
What is the latest on Iraq and Libya's oil supply?
Iraq resumed oil exports to Turkey, while Libya redirected flows from a damaged oilfield without affecting production.
What were the Brent and WTI crude price changes?
Brent dropped $1.15 to $102.27 a barrel, while WTI fell $1.54 to $94.67 a barrel.

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