[TOKYO] Oil prices climbed on Tuesday (Feb 1), hovering near seven-year highs hit last week, on expectations that a limited production increase by major oil producers and a solid post-pandemic recovery in fuel demand will keep a tight supply condition.

Brent crude for April delivery was up 34 US cents, or 0.4 per cent at US$89.60 a barrel at 0455 GMT.

The front-month contract for March delivery expired on Monday at US$91.21 a barrel, up 1.3 per cent.

US West Texas Intermediate crude rose 32 cents, or 0.4 per cent, to US$88.47 a barrel, having gained 1.5 per cent in the previous day.

The benchmarks hit their highest levels since October 2014 on Friday, at US$91.70 and US$88.84, respectively. They have gained about 17 per cent in January, the biggest monthly gain since February 2021, amid a supply shortage and geopolitical tensions in Eastern Europe and the Middle East.

"The market is maintaining a bullish tone on expectations that supply tightness will continue as demand is picking up, with receding fears over spreading Omicron coronavirus variant," said Hiroyuki Kikukawa, general manager of research at Nissan Securities.

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"All eyes are on Opec+ decision as well as development of the conflict between Russia and the West over Ukraine," he said.

Market analysts and Reuters sources widely expect Opec+, which groups the Organization of the Petroleum Exporting Countries and allies led by Russia, to keep to its policy of gradual production increases when it meets on Wednesday.

Opec's oil output in January has again undershot the rise planned under a deal with allies, a Reuters survey found on Monday, highlighting some producers' struggle to pump more even as prices are high.

"We expect little surprise from the Opec+ meeting, though there is a small chance that Saudi will voluntarily increase output outside the Opec framework to avoid the fall in demand caused by higher prices," said Naohiro Niimura, a partner at Market Risk Advisory, a research and consulting firm.

"If no surprise, Brent is expected to stay between US$85 and US$95 for a while due to concerns over supply shortage amid rising geopolitical tensions," he said.

Tensions between Russia and the West have underpinned crude prices. Russia, the world's second-largest oil producer, and the West have been at loggerheads over Ukraine, fanning fears that energy supplies to Europe could be disrupted.

The United States and Britain are prepared to punish Russian elites close to President Vladimir Putin with asset freezes and travel bans if Russia enters Ukraine, Washington and London said on Monday as tensions also spilled over at the United Nations.

The risk of geopolitical disruptions to oil supply at a time of already tight inventories due to the strong post-pandemic recovery has sent the premium commanded by barrels for prompt delivery soaring, suggesting the current price rally has further to run. REUTERS