Brent crude oil prices hit their lowest in more than 11 years on Monday, while U.S. crude flirted with seven-year lows on more signs that swelling global supply looked set to outpace tepid demand again next year.
Global oil production is running close to record highs and, with more barrels poised to enter the market from nations such as Iran and Libya, the price of crude is set for its largest monthly percentage decline in seven years.
Brent's premium over U.S. crude narrowed further as the market braced for the end of a 40-year ban on U.S. crude exports. President Obama signed a law on Friday that will end the ban.
U.S. crude futures for January delivery — which expired Monday —settled up 1 cent, or 0.03 percent, at $34.74 a barrel, after bouncing off an intraday low of $33.98.
Brent futures were down 68 cents at $36.20, after falling as much as 2 percent during the session to a low of $36.04 a barrel, its weakest since July 2004.