SHARES of China National Petroleum Corp and Sinopec rebounded during the week on reforms that are set to transform the two oil and gas giants into more competitive and market-focused entities.

Russia and 10 other non-OPEC nations joined forces with the Organization of Petroleum Exporting Countries on Dec. 10 to end a global glut that’s crashed oil prices and shaken energy-rich economies. The pact — the first between the two sides in 15 years — involves a reduction of 558,000 barrels a day from non-OPEC countries starting in January.

Saudi Arabia has cut its crude-oil production by at least 486,000 barrels a day since October, said a person familiar with the kingdom’s output, bringing the world’s largest exporter of petroleum swiftly into line with OPEC’s deal to raise prices.

Russia cut its oil production in early January by around 100,000 barrels per day (bpd) from the previous month after an agreement with OPEC to cap global crude output, two sources from the energy sector told Reuters on Monday.

The decline in December comes as OPEC, which controls around 40 percent of global supply, is planning to curb output in a bid to boost oil prices. The organization reached a historic deal last month with Russia and other non-members to cut global production by almost 1.8 million barrels a day starting this month.

В 2017 году цена на нефть будет в диапазоне 55 - долларов за баррель.

U.S. benchmark West Texas intermediate (WTI) crude futures were up 23 cents to $54.00 at 0746 GMT. Brent front-month March crude oil futures rose 31 cents to $57.16.

U.S. light crude was down 20 cents at $53.86 by 0930 GMT (4:30 a.m. ET), while North Sea Brent crude was up 5 cents at $56.27 a barrel.

The analysts predicting that Brent will average $58 a barrel next year expect $53 in the first quarter and $56 in the second. West Texas Intermediate will be about $1.40 cheaper than Brent in 2017, the estimates show. WTI settled at $53.90 in New York on Tuesday.

International Brent LCOc1 crude futures were trading down 7 cents, or 0.12 percent, at $56.02 a barrel at 0722 GMT (2.22 a.m. ET) after closing the previous session up 93 cents. U.S. benchmark West Texas Intermediate (WTI) crude oil prices CLc1 were down 8 cents at $53.82 per barrel after settling up 88 cents at $53.90 a barrel in the previous session.