Japanese refiners have received notices of crude supply cuts from "some producers" for January loading, following OPEC's November 30 decision to cut production.

Iraq plans to increase crude-oil exports in January, government records show, immediately raising questions about its commitment to slashing production in line with OPEC’s landmark production agreement last month.

Operations have restarted at two key oil fields and a connected pipeline in Western Libya that have been shut down for over two years, Libyan officials said, following an agreement with local tribes.

International Brent crude futures were down 58 cents at $55.14 per barrel at 1054 GMT. U.S. West Texas Intermediate (WTI) crude oil futures were down 61 cents at $52.37 a barrel.

Brent crude, the global oil benchmark, rose 4.27% to $56.67 a barrel on London’s ICE Futures exchange. On the New York Mercantile Exchange, West Texas Intermediate futures were trading up 4.80% at $53.95 a barrel.

Brent crude for February delivery LCOc1 was up 12 cents at $54.01 a barrel by 0752 GMT, after rising 1.7 percent on Thursday. The contract hit its highest since July 2015 at $55.33 on Monday. U.S. crude for January delivery CLc1 was up 32 cents at $51.16 a barrel. Both contracts have lost nearly 1 percent so far this week.

OPEC crude oil production for November rose for the sixth straight month, to a record 33.86 million b/d.

North Sea Brent crude was up 25 cents at $53.25 a barrel by 0940 GMT. U.S. light crude was up 20 cents at $49.97 a barrel.

North Sea Brent crude oil LCOc1 was up 10 cents a barrel at $54.03 by 0950 GMT. U.S. light crude CLc1 was up 15 cents at $51.08 a barrel.

International Brent crude oil futures LCOc1 were trading at $54.83 per barrel at 1127 GMT, down 11 cents from Monday's close. U.S. West Texas Intermediate crude was at $51.50 a barrel, down 29 cents.