London Brent crude for February delivery LCOc1 was down 1 cents at $55.15 a barrel by 0335 GMT (10.35 p.m. ET) after settling up 11 cents on Friday. Oil markets were closed on Monday after Christmas at the weekend. NYMEX crude for February delivery CLc1 was up 10 cents at $53.12 a barrel, after closing at a 17-month high on Friday.

Russia's output of oil products is expected to fall by about 2.5 percent in 2017 due to further work on a massive refinery modernisation programme aimed at boosting fuel quality, a deputy energy minister said.

Iraq is fully committed to delivering on OPEC’s Nov. 30 agreement to reduce supplies, Oil Minister Jabbar al-Luaibi said Thursday in Cairo at a meeting of the Organization of Arab Petroleum Exporting Countries, known as OAPEC.

Benchmark Brent crude oil futures LCOc1 were trading up 56 cents, or 1 percent, at $55.48 a barrel at 1329 GMT. U.S. West Texas Intermediate (WTI) crude futures CLc1 were up 29 cents at $52.41 a barrel, not far off a one-week high of $52.52.

Россия сегодня добывает больше 11 млн барр. в сутки, мы очень крупный игрок среди стран-производителей, поэтому без нас сегодня практически невозможен процесс регулирования нефтяных рынков. Мы пошли на договоренности по снижению добычи, потому что это даст положительный результат и для бюджета, и для нефтяных компаний, поможет стабилизировать ситуацию в целом. Раньше они балансировали рынок самостоятельно, но в настоящий момент вряд ли страны ОПЕК приняли бы решение о сокращении добычи без нас. В этот раз для ОПЕК было важно участие в сокращении добычи и других стран-производителей, чтобы достичь желаемого эффекта.

Brent crude futures were trading at $54.02 per barrel at 0808 GMT, flat from its last settlement. U.S. West Texas Intermediate (WTI) crude was down 2 cents at $50.88 per barrel.

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

Средняя цена на нефть Urals за период мониторинга с 15 ноября по 14 декабря 2016 года составила $47,82068 за баррель, или $349,1 за тонну.

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.

Iran's crude oil exports in December are set to fall 8 percent from November to a five-month low, a source with knowledge of its preliminary tanker schedule said, as lower shipments to China and others in Asia offset bumper exports to Europe.

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.

The first global crude supply pact in 15 years has underlined the growing energy alliance between Saudi Arabia and Russia, as the depth of the two-year oil slump forces co-operation between once unlikely partners.

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.