* OPEC President says group could cut more supply if needed
* OPEC may consider new 1 million bpd cut in March-source
* Reuters poll shows OPEC makes 67 pct of pledged cut in Jan
* Nigeria oil union threatens strike from Feb. 9
* U.S. crude stocks seen up for sixth straight time (Updates throughout)
LONDON, Feb 3 (Reuters) - Oil climbed towards $41 a barrel on Tuesday after OPEC signalled it might cut even more supply in addition to record curbs in order to help boost prices and drain bloated stockpiles.
OPEC's president told Reuters the group could take more action when it meets on March 15. An OPEC source said later in the day that the 12-member group may discuss a further cut of about 1 million barrels per day (bpd).
U.S. light crude for March delivery <CLc1> rose 73 cents to $40.81 by 1631 GMT, having fallen to $39.83 on Monday, the first time below $40 a barrel in three weeks. London Brent <LCOc1> was 40 cents higher at $44.22.
"Prices do seem to have bottomed for now," said Kevin Norrish of Barclays Capital. "OPEC has probably taken more than enough off the market and there's a risk of over-tightening, in which case prices would go back up fairly swiftly."
Despite softening world energy demand, oil has held above the $40 mark in recent weeks, buoyed partly by OPEC's pact to remove more than 4 million bpd of output since September to rebalance world markets.
A Reuters survey showed the group, which pumps a third of the world's oil, had carried out about 67 percent of its record curb in January.
Oil fell sharply on Monday as the worsening global financial crisis led to grim forecasts for fuel demand and U.S. refinery workers averted a strike that would have cut output. [
]While protests ended in the U.S. energy sector, they could be about to start in OPEC producer Nigeria.
Nigeria's senior oil workers' union threatened to begin an indefinite strike from Monday unless the government improved security in the Niger Delta, its restive oil heartland.
Nigeria pumped about 1.75 million barrels per day (bpd) in January, versus its OPEC supply target of 1.67 million bpd, according to the Reuters survey. [
]Lead OPEC producer Saudi Arabia and neighbouring Gulf members virtually met their supply targets, which analysts said would go some way in removing excess oil.
"OPEC cuts will begin to take effect on inventories in a few months and the market is pricing that in. The caveat is the economy," said Anthony Nunan, risk management executive at Tokyo-based Mitsubishi Corp.
OPEC President Jose Botelho de Vasconcelos, also Angola's oil minister, said on Tuesday the group could cut more.
Slowing economic growth in the United States, Japan and other major consumers has dampened fuel use, swelled stocks and knocked more than $100 a barrel off the price of crude since its July 2008 peak near $150.
In addition, inventories in top consumer the United States were expected to grow yet higher.
U.S. crude inventory data were likely to show stocks rose for the sixth time in a row as refinery utilisation remained curbed by seasonal maintenance and imports rose, according to a Reuters poll of analysts. [
].Analysts issued their forecasts ahead of weekly inventory data to be released on Wednesday by the U.S. Energy Information Administration. Industry group American Petroleum Institute will release its data on Tuesday. (Reporting by Peg Mackey in London, Annika Breidthardt in Singapore; editing by William Hardy/Alex Lawler)