(Adds trader comment, updates prices)
By Jane Merriman
LONDON, April 28 (Reuters) - Oil hit a new record near $120 a barrel on Monday, boosted by a string of bullish factors that included big disruptions to Nigeria's output and a UK refinery strike, highlighting anxieties over threats to supply.
Prices retreated from early peaks as the dollar gained versus the euro, reflecting some expectations that the U.S. Federal Reserve may not cut interest rates this week.
U.S. light crude for June delivery <CLc1> was up 37 cents at $118.89 a barrel by 1534 GMT, after a record high of $119.93. Prices are up almost 25 percent since the start of the year.
London Brent crude <LCOc1> was up 43 cents at $116.77.
"Continued attacks in Nigeria and refinery closures in Scotland ... may see the U.S. target $121-122 a barrel this week, with longer-term charts all pointing to $130 or higher," said Ben Coleman, senior commodities trader at TradIndex.
Crude prices have surged more than fivefold since 2002 as global supplies struggle to keep pace with rising demand in emerging economies, such as China.
Years of underinvestment in new oil production means the market could struggle to keep pace with booming China demand. The finely-balanced supply-demand outlook has made prices sensitive to any supply disruptions.
NIGERIA DISRUPTIONS
Exxon Mobil <XOM.N> has had to shut nearly all of its Nigerian oil production, totalling around 770,000 barrels per day, due to a strike. [
]On Sunday, unidentified gunmen killed five policemen and seized several weapons in a raid on a police station in the oil-rich southern Nigerian state of Rivers. [
]Niger Delta rebels have said an April 24 pipeline attack had shut down a further 350,000 barrels per day of production by Royal Dutch Shell <RDSa.L>.
Shell was not available for comment. A previous bombing raid had hit 169,000 barrels per day of Shell's Nigeria output, the company said last week. [
]In Britain the 700,000-barrel-per-day (bpd) Forties North Sea crude oil pipeline remained closed on Monday due to a strike at the 210,000 bpd Grangemouth refinery over pensions [
]Ineos, the owner of the Grangemouth refinery, expects striking employees to return to work on Tuesday. BP has said the Forties pipeline could then be back in operation within 24 hours but might take a few more days to get back to full flow.
The Organization of the Petroleum Exporting Countries (OPEC), that produces more than a third of the world's oil, has refused to pump more, saying the market is adequately supplied.
OPEC President Chakib Khelil blamed the fall in the dollar for high prices and did not rule out prices rising to $200 a barrel.
"Without geopolitical problems and the fall in the dollar, the prices of oil would not be at this level," he was quoted saying in Algerian government newspaper El Moudhajid. [
](Additional reporting by Fayen Wong in Perth; editing by William Hardy)