Oil rose towards $89 a barrel on Wednesday, within sight of a seven-year high, supported by tight supply and geopolitical tensions in Europe and the Middle East that raise concerns about further disruption.
US President Joe Biden said on Tuesday he would consider personal sanctions on President Vladimir Putin if Russia invades Ukraine. On Monday, Yemen's Houthi movement launched a missile attack on a United Arab Emirates base.
"Anxiety over potential supply disruptions in the Middle East and Russia is providing bullish fodder for the oil market," said Stephen Brennock of oil broker PVM.
Brent crude rose 61 cents, or 0.7 per cent, to $88.81 at 0917 GMT. On Jan. 20 it reached $89.50, the highest since October 2014.
US West Texas Intermediate (WTI) crude was up 25 cents, or 0.3 per cent, to $85.85.
"The market downside is limited due to heightened tensions between Russia and Ukraine and the threat to infrastructure in the UAE," said Hiroyuki Kikukawa, general manager of research at Nissan Securities.
Underlining a tight supply and demand balance, the weekly US inventory report from the American Petroleum Institute on Tuesday showed crude stocks fell by 872,000 barrels, market sources said.
The official Energy Information Administration (EIA) supply report is due at 1530 GMT.
Investors across the markets are also awaiting the update at 19000 GMT from the US Federal Reserve. The Fed is expected to signal plans to raise interest rates in March as it focuses on fighting inflation.
In another key development, the Organization of the Petroleum Exporting Countries and allies, known as Opec+, meets on Feb. 2 to consider another output increase.
Opec+ has been gradually unwinding 2020's record output cuts, raising its monthly target by 400,000 barrels per day, though the actual increase in supply has fallen short of that as some countries struggle to raise production. --Reuters