(now tracks Dubai First Line (Platts) energy futures as Adnoc phases out Murban.)
Crude oil benchmarks were mixed on Wednesday amid escalating US-Iran hostilities and a plunge in commercial vessel traffic through the Strait of Hormuz.
Brent crude futures gained 1% to $95.61 per barrel, while ICE Dubai First Line (Platts) energy futures were down 0.2% to $85.15/bbl, and eased from a near three months high.
"Crude oil extended gains as fresh US attacks on Iran raised concerns about prolonged disruptions to supply," ANZ analysts said.
According to US Central Command, American forces launched a large-scale wave of strikes against Islamic Revolutionary Guard Corps targets in response to attempted attacks on commercial shipping and failed efforts to deploy sea mines in the Strait of Hormuz.
In retaliation, IRGC officials warned of severe punishment and claimed responsibility for operations targeting US bases in the region, while the US administration maintained a naval blockade aimed at crippling Iranian oil exports.
Geopolitical tensions severely impacted physical logistics, with commercial vessel traffic through the Strait of Hormuz plunging by half to just five crossings on August 31, down from ten a day prior.
However analysts note that while a "dark fleet" of clandestine shuttle movements by Persian Gulf producers has attempted to bypass the bottleneck, overall export volumes continue to decline.
Analysts said that these alternative routes remain insufficient to offset regional flow restrictions, tightening global crude and refined product balances.
On the domestic supply front, American Petroleum Institute data released on Tuesday showed that US crude oil inventories fell by 2.6 million barrels for the week ended August 28, following a 4.2 million-barrel build the previous week.
Markets are now awaiting confirmation from the US Energy Information Administration's inventory report to gauge the trajectory of domestic reserves as ongoing Middle Eastern disruptions keep global inventories under intense pressure.
"Moreover, the oil market is likely to come under significant stress, as disruptions to flows from the Persian Gulf continue to tighten global crude and refined product balances. This will keep inventories under pressure and support elevated prices," ANZ added.