The 12-nation Opec also commented on major oil producer Russia, which is not a member of the cartel. It noted the "big challenge" Russia is facing from slumping oil prices and Western sanctions over Ukraine, which could see it lose US$135 billion ($183 billion) in 2015.
Russia "faces a big challenge due to sanctions, devaluation of the ruble and an oil price drop in 2015 ... if the oil price stays at the current US$55 per barrel for a year, Russia will earn around US$135 billion less in 2015 than in 2014 assuming US$100 per barrel for that year - equivalent to around 10 per cent of its gross domestic product."
Opec's assessment of the global oil market came after the International Energy Agency issued a similar reading on Saturday.
The IEA's warning that the rebound in oil prices is built on flimsy foundations sent crude prices sliding.
Oil prices extended their losses yesterday, with the US benchmark West Texas Intermediate for April delivery dipping as low as US$43.57 a barrel before closing US96c lower at US$43.88, while Brent North Sea crude for April fell US$1.23 to US$53.44 a barrel.AFP