* Brent headed for 22 pct qtrly gain, biggest since Q2 2009
* Coming Up: U.S. weekly initial jobless claims; 1230 GMT
(Changes dateline, updates throughout)
By Jessica Donati
LONDON, March 31 (Reuters) - Brent crude rose over $1 on Thursday to $116.35 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> advanced 65 cents on Thursday to $115.78 barrel at 0941 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> climbed 71 cents to $104.98.
In Syria, where more than 60 people have already been killed in protests, President Bashar al-Assad defied calls to lift a decades-old emergency law as hundreds chanting "freedom" marched in the port city of Latakia 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, although the outlook for consumption in the aftermath of the earthquake 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. [
]"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.
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 in a counter-attack on Wednesday, highlighting the vulnerability of rebel forces in the absence of Western air strikes. [
]Gaddafi's regime took a hit after the country's foreign minister defected in protest against attacks on civilians and flew to Britain. [
]U.S. President Barack Obama has signed a secret order authorising covert U.S. government support for rebel forces seeking to oust Gaddafi, government officials told Reuters on Wednesday. [
]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.
<^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ More on Middle East unrest: [
] [ ] Libya Graphics http: //link.reuters.com/neg68r Interactive graphic http://link.reuters.com/puk87r ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^>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. [
]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.
"The world economy should be quite positive, especially after mid-May, and the downside for crude should be quite limited because of the geopolitical risk of disruption to supply in the Middle East and North Africa." (Reporting by Jessica Donati; editing by Jason Neely)