World oil prices are higher following an attack on a beseiged Algerian gasfield amid fighting in neighbouring Mali.
Brent North Sea crude for delivery in March climbed 73 cents to $US110.41 a barrel in late London trading on Thursday.
AAP reports New York's main contract, light sweet crude for February, gained $US1.05 to $US95.29 a barrel.
Prices were being supported also by indications of rising demand for crude in the United States.
A report by the US Energy Administration on Wednesday said American oil stockpiles dropped by one million barrels in the week to 11 January.