Brent crude futures gained $1.22, or 1.1%, at $114.34 a barrel by 1647 GMT.
Front-month prices slumped 9.2% last week for the first decline in eight weeks.
U.S. West Texas Intermediate crude climbed 61 cents, or 0.5%, to $110.17 in subdued trade.
Western sanctions have reduced access to oil from Russia after its invasion of Ukraine.
China’s crude oil imports from Russia in May soared 55% from a year earlier to a record high, displacing Saudi Arabia as the world’s top supplier.
Analysts expect limited summer increases from the Organization of the Petroleum Exporting Countries and its allies.
There has been some mitigation for tight supply with the release of strategic petroleum reserves, led by the United States. Weekly crude output in the United States, the world’s top producer, has also returned to pre-pandemic levels as the rig count slowly grows.
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