Oil price up on Mid East turmoil and Japan energy needs
Brent crude futures broke back above $113 a barrel, while US light, sweet crude reached $100 again.
With Libyan production already near zero, markets took fright at the turmoil in Bahrain and the risk it may spread to neighbouring Saudi Arabia.
Meanwhile, with much of Japan's nuclear power sector shut down, the country is set to increase energy imports.
Energy imports
The market had initially taken fright at Japan's earthquake and tsunami on Friday, with crude prices falling from recent highs on fears that Japanese demand would slump.
Brent crude dipped to $107.35 a barrel earlier in the week, while US crude hit $96.21.
Large parts of Japanese manufacturing have been shut down in order to assess damage from the twin disasters, and are likely to operate below capacity for months as the government rations electricity.
Markets had feared this would also affect global production, as many industries - such as cars and computer manufacturers - rely on Japan to produce critical parts.
However, analysts say it is becoming increasingly apparent that with its electricity generating capacity severely limited, Japan will need to significantly step up its energy imports.
Japan's nuclear capacity - which accounts for nearly 30% of electricity generation - has been hardest hit, with 11 of its 54 reactors not operating.
The total loss of generating capacity is estimated at anywhere between 10% and 40%; Kazinform cites BBC News.
See www.bbc.co.uk for full version