Global crude oil prices edged higher on Thursday as investors anticipated upbeat US stockpiles data and grew more optimistic about the world's top economy, analysts said.
Brent North Sea crude for February added 30 cents to $111.10 a barrel nearing midday in London.
New York's main contract, West Texas Intermediate for delivery in February, won just 29 cents to $98.71 per barrel.
Sanjeev Gupta, head of the Asia-Pacific oil and gas practice at consultancy firm EY, said prices were buoyed by "signs of revival in the US economy".
Kelly Teoh, market strategist at IG Markets in Singapore, said investors were looking ahead to the release of US stockpiles data on Friday, with thin Asian trade due to the closure of Japanese financial markets.
The report, usually released on Wednesday, has been postponed due to the New Year's Day holiday.
According to analysts polled by Dow Jones Newswires, the average forecast is that crude oil supplies fell 2.2 million barrels last week.
"Everyone's just looking at the inventories... I don’t think, in terms of fundamentals, anything has changed which is why the movement is very subdued," Teoh told AFP.
Investors are also monitoring the situation in crude producer Iran after the IRNA news agency on Wednesday said experts from Tehran and world powers have chosen January 20 to begin implementing a deal on Tehran's nuclear programme.
Iran and the so-called P5+1 nations -- the United States, Britain, France, Russia and China plus Germany -- have been holding technical talks on implementing a deal reached in November on Iran's controversial nuclear ambitions.
Tehran's crude exports have been halved to 1.2 million barrels per day following crippling international sanctions imposed on it for allegedly covertly pursuing a nuclear weapons capability alongside its civilian programme.
The Islamic republic, a member of the OPEC cartel, insists its uranium enrichment is for purely peaceful purposes.