Supplies outside OPEC are expected to contract in 2016 for the first time since 2008, sliding by 200,000 barrels a day, according to the International Energy Agency. With consumption set to grow by 1.4 million barrels a day, OPEC and its de facto leader Saudi Arabia could seize the chance to broaden their market as competitors damaged by the price slump fall off.

Although OPEC's statutes say support from a simple majority of the 12 members can trigger an extraordinary meeting, none will occur without support from Saudi Arabia, which has yet to give its blessing, OPEC delegates say.

Most Middle Eastern stock markets declined amid mounting concern the region’s largest economy will cut spending after oil prices slumped to the lowest since 2009.

China Petroleum & Chemical Corp., Asia’s biggest oil refiner, posted a 22 percent decline in profit for the first half of the year as the slump in prices outweighed the benefit of cheaper crude to its refining business.

Iran will ramp up crude oil production and reclaim its lost share of exports shortly after international sanctions on the OPEC member are lifted, Iran's oil minister Bijan Zanganeh said on Tuesday.

Oil production from the Organization of the Petroleum Exporting Countries (OPEC) totaled 31.4 million barrels per day (b/d) in July, up 120,000 b/d from the June level of 31.28 million b/d

Saudi Arabia is expected to raise prices for crude it sells to Asia in September due to a stronger Dubai benchmark, traders and analysts said on Monday, adding that the top oil exporter will be wary of a hike so big it would threaten its market share.

OPEC and Russia say they expect the global oil market to become more balanced and stable next year after the recent sharp drops.

OPEC pumped 31.28 million barrels per day in June, the fourth straight month since February that the group has added production.

The Organization of the Petroleum Exporting Countries said Monday it revised down the demand for its crude this year, to a level far below its current output, despite higher estimates for global consumption.