* Brent headed for 22 pct qtrly gain, biggest since Q2 2009
* Coming Up: U.S. weekly initial jobless claims; 1230 GMT
(Updates prices, adds quote, details)
By Jessica Donati
LONDON, March 31 (Reuters) - Brent crude rose over $1 on Thursday to $116.78 a barrel, heading for its biggest quarterly gain in almost 2 years, as Middle East supply worries led concerns.
Traders, analysts and investors see a new floor for prices around $100 a barrel, supported by supply risks and expanding economies after the most turbulent and volatile quarter for the oil market since the end of 2008.
Brent crude for May <LCOc1> were up $1.24 cents to $116.37 barrel at 1034 GMT, less than $4 from a 2-1/2-year high near $120 on Feb. 24. Brent fell below $108 in the aftermath of Japan's earthquake.
U.S. crude <CLc1> was up $1.08 cents to $105.35.
Worries mounted about Syria, where more than 60 people have been killed in protests, as President Bashar al-Assad defied calls to lift a decades-old emergency law despite hundreds marching in Latakia chanting "freedom" on Wednesday. [
]"Friday prayers may be a key issue supporting the market now, and some of the focus is starting to shift back to Japan and the cost of rebuilding the country," said Thorbjoern Bak Jensen, an analyst at Global Risk Management.
Japan's oil product sales rose 0.8 percent in February from a year earlier as improvement in the economy helped boost gasoline demand for a fourth straight month. The outlook for consumption in the aftermath of the earthquake and tsunami remained uncertain. [
]Lost nuclear power and reconstruction efforts could boost Japanese demand for oil to generate electricity. The International Energy Agency has said an additional 200,000 barrels per day will be needed to fill in after Japan's nuclear disaster. But traders say the impact on world supply could be higher. [
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NUCLEAR DEBATE
A parcel bomb attack on a nuclear lobby group in Switzerland highighted the backlash against nuclear development plans in the aftermath of the Japanese disaster at Fukushima. [
]"The nuclear issue in Japan could have quite significant consequences. A lot of countries are now debating nuclear and new building is on hold," a gasoil trader said.
Switzerland has halted the approvals process for three new nuclear power stations, while Germany quickly suspended operations at seven ageing nuclear plants.
Austria has demanded pan-European 'stress tests', Italy announced a one-year moratorium on new plants and Bulgaria tightened restrictions on its Belene nuclear project near a quake zone.
Others argue that lower Japanese output could ultimately weaken imports, balancing against a further drop in oil supply from the Middle East.
"There seems to be a statistical surplus in the system given that Saudi production has more or less offset the Libyan shortfall, while weak Japanese imports will go a long way in further alleviating demand pressures," Edward Meir, senior commodity analyst at MF Global, said in a note.
WAR IN LIBYA
The prospect of a protracted civil war in Libya remained as forces loyal to Libyan leader Muammar Gaddafi regained key oil ports at Ras Lanuf and Brega on Wednesday, highlighting the vulnerability of rebel forces in the absence of Western air strikes. [
]Gaddafi's foreign minister defected and flew to Britain on Wednesday while government sources told Reuters that U.S. President Barack Obama had signed a secret order authorising covert U.S. government support for rebel forces. [
] [ ]The United States is part of a coalition, with NATO members and some Arab states, which is conducting air strikes on Libyan government forces under a U.N. mandate aimed at protecting civilians opposing Gaddafi.
Libyan oil shipments remain at a standstill, with no one attempting to hire tankers due to violence and the impact of sanctions, shipping sources said on Wednesday. [
]<^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ More on Middle East unrest: [
] [ ] Libya graphics http: //link.reuters.com/neg68r Interactive graphic http://link.reuters.com/puk87r ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^>GLOBAL RECOVERY
U.S. private employers added more than 200,000 jobs in March, a report showed on Wednesday, ahead of government data on March non-farm payrolls due on Friday. [
]Weekly U.S. initial jobless claims due at 1230 GMT for the week ending March 26 are likely to drop to their lowest in four weeks and the second lowest since July 2008, according to IFR Markets, a Thomson Reuters news and market analysis service.
"The second quarter is a good period, and oil demand should be increasing," said Tetsu Emori, a Tokyo-based commodities fund manager at Astmax Investments, adding that he expected U.S. crude to end the year close to $120. (Additional reporting by Claire Milhench and Alejandro Barbajosa; editing by Jason Neely)