OPEC lowered its world oil demand growth forecast for 2026 to 580,000 barrels per day in its monthly oil market report.
The International Energy Agency also said it expected a contraction of 1.6 million bpd in consumption this year, versus a drop of 1 million bpd forecast last month, with demand curtailed by higher prices and restricted supply due to the U.S.-Israeli war with Iran.
Prices, however, were pressured after a report from Yemen's Houthi-run Saba news agency said the militant group attacked an Aramco refinery in Saudi Arabia's Jazan with two drones on Thursday.
News of the attacks sent diesel cracks HOc1-CLc1 to an all-time high. According to Saudi Aramco's website, the Jazan refinery has the capacity to produce 250,000 bpd of ultra-low sulfur diesel.
A Houthi military source said the attack was in response to what the group described as Saudi violations of Yemeni airspace and sovereignty in Saada and Hajjah provinces. Saudi Arabia did not immediately comment on the report.
Supply disruptions in the Middle East and the Black Sea region continued to support oil prices, with the U.S. and Iran making competing claims over the Strait of Hormuz, through which about 20% of global oil supply passed before the start of the Iran war.
The strait is "under Iran's control and management", the recently appointed head of Iran's Basij paramilitary unit said on Thursday, a day after U.S. President Donald Trump said the United States had "total control" of the waterway.
Iran and the United States remain at loggerheads over efforts to agree a permanent end to the war in the Gulf, according to a senior Iranian source, who said there had been no progress in talks to revive the interim deal agreed in June and define a time frame to implement it.
U.S. Defense Secretary Pete Hegseth said on Thursday that the United States military could keep a blockade on Iranian ports for as long as needed.
Traders continued to assess the scale of disruption after U.S. Energy Secretary Chris Wright said about 9 million bpd was moving through the strait weekly, while shipping data showed vessel crossings excluding container ships dropped to five on Wednesday, their lowest in three weeks.
Before the war, 125 to 140 vessels passed through the crucial waterway each day.
"Conflicting stories continue to drive the narrative as to who controls the Strait of Hormuz and just how many ships are making passage," said Tim Snyder, chief economist at Matador Economics.
Adding to market tightness, Russia's seaborne oil product exports fell sharply in July after Ukrainian drone attacks led to unplanned maintenance at key domestic refineries, industry sources said and Reuters' calculations showed.
In the Russian city of Orsk, an oil refinery that was hit by a Ukrainian drone strike two days ago has been forced to shut down, and repairs could take up to six months, the regional governor said on Thursday.
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