SINGAPORE, Feb 24 (Reuters) - Oil prices hit a fresh 2-1/2 year peak on Thursday on concern the bloody unrest in OPEC-member Libya could spread to other major producers in the region including Saudi Arabia.
Disruption stemming from the revolt in Libya has cut more than a quarter of output from the world's No. 12 exporter. At least 400,000 barrels per day of the country's 1.6 million output is shut, according to Reuters calculations.
Brent crude touched $113 a barrel for the first time since Sept. 1, 2008. The contract later trimmed gains and was up $1.53 at $112.78 a barrel at 0310 GMT.
U.S. crude for April delivery rose $1.01 to $99.11 per barrel, after touching $100 for the first time since October 2008 on Wednesday.
The cuts from Libya represent the first disruption to supply as a wave of protests swept through the oil producing regions of North Africa and the Middle East.
The concern for oil markets is how the protests affect Saudi Arabia, which not only pumps around 10 percent of the world's oil but is also the only holder of significant spare crude production capacity that could be used to plug supply outages elsewhere.
Without Saudi Arabia's 4 million bpd of spare capacity, there is little margin in the global oil system to deal with supply shortages.
To date, the kingdom has escaped the popular protests against poverty, corruption and oppression that have raged across the Arab world, toppling the long-time leaders of Egypt and Tunisia and spreading as far as Saudi neighbour Bahrain.
"You can't ignore it, if you have trouble in Bahrain, there is a fear that this could spread into Saudi Arabia," said Tony Nunan, a risk manager with Tokyo-based Mitsubishi Corp.
"No one expected Egypt's (Hosni) Mubarak to go, now anything is possible and that is why everyone is watching this closely."
Saudi King Abdullah returned home on Wednesday from a three-month medical absence and unveiled benefits for Saudis worth some $37 billion in an apparent bid to insulate the world's top oil exporter from the protests across the Arab world.
Hundreds of people on Wednesday backed a Facebook page campaigning for a "day of rage" across the kingdom on March 11 to demand an elected ruler, greater freedom for women and the release of political prisoners.
LIBYA
Eastern areas holding much of Libya's oil have slipped from the control of Muammar Gaddafi, who has unleashed a bloody crackdown on protesters to keep his 41-year grip on power. The death toll may already be as high as 1,000 people, Italy's Foreign Minister said.
President Barack Obama broke his silence on Libya late on Wednesday, calling for international unity to end the violence but did not call for Gaddafi to go. .
Staff from international oil firms are among the many leaving the country as governments around the world scramble to send planes and ships to evacuate their citizens from the North African producer.
Top Chinese oil and gas company China National Petroleum Corp (CNPC) said on Thursday it had evacuated some of its employees.
The unrest has added as much as $20 to oil as investors price in the potential for further disruptions, but for now supply was plentiful, Nunan said.
"There is about a $10-$20 risk premium on oil prices at the moment, but fundamentals show that the market is still well supplied for now even with disruptions to production in Libya," he said.
Weekly U.S. oil inventory data from industry group API showed on Wednesday that petroleum stocks had risen 163,000 barrels last week, after analysts polled by Reuters had forecast a bigger rise of 1.2 million barrels.
Distillate inventories fell a less-than-expected 534,000 barrels and gasoline supplies fell by 1.6 million barrels, API data showed, bucking analyst expectations for a rise.
U.S. Energy Information Administration's weekly inventory figures are due to be released later today.
Brent traded at a $13.65 spread to U.S WTI at 0311 GMT, wider than the $13.28 close on Wednesday. (Reporting by Luke Pachymuthu; Editing by Simon Webb)