Oil prices surged higher on Monday after the United States and China agreed to a 90-day truce in a trade dispute and Canada's Alberta province ordered a production cut, while exporter group OPEC looked set to reduce supply.
Both benchmarks surged by more than 5 percent earlier in the session.
China and the United States agreed during a weekend meeting in Argentina of the Group of 20 leading economies not to impose additional trade tariffs for at least 90 days while they hold talks to resolve existing disputes.
The trade war between the world's two biggest economies has weighed heavily on global trade, sparking concerns of an economic slowdown.
Crude oil has not been included in the list of products facing import tariffs, but traders said the positive sentiment of the truce was also driving crude markets.
Oil also received support from an announcement by the Canadian province of Alberta that it would force producers to cut output by 8.7 percent, or 325,000 barrels per day (bpd), to deal with a pipeline bottleneck that has led to crude building up in storage.
"From Argentina to Alberta, the oil market news is about supply curtailments," said Norbert Rücker, head of commodity research at Swiss bank Julius Baer. "A brightening market mood will likely extend today's price rally in the very near term."
OPEC meets on Dec. 6 to decide output policy. The group, along with non-OPEC member Russia, is expected to announce cuts aimed at reining in a production surplus that has pulled down crude prices by around a third since October.
"Markets are expecting to see a substantial production cut after Russian President Vladimir Putin said his country's cooperation on oil supplies with Saudi Arabia would continue," said Hussein Sayed, chief market strategist at brokerage FXTM.
Within OPEC, Qatar said on Monday it would leave the producer club in January.
Qatar's oil production is only around 600,000 bpd, but it is the world's biggest exporter of liquefied natural gas (LNG). The Gulf state has also been at loggerheads with its much bigger neighbor Saudi Arabia, the de facto OPEC leader.
Outside OPEC, Russian oil output stood at 11.37 million bpd in November, down from a post-Soviet record of 11.41 million bpd it reached in October, Energy Ministry data showed on Sunday.
Russian President Vladimir Putin said on Saturday he had no concrete figures on possible oil output cuts, though his country would continue its contribution to reducing global production.
Meanwhile, oil producers in the United States continue to churn out record amounts of oil, with crude output at an unprecedented level of more than 11.5 million bpd. With drilling activity still high, most analysts expect U.S. oil production to rise further in 2019.
— CNBC's Tom DiChristopher contributed to this report.