OPEC's largest producer Saudi Arabia averaged 9.97 million b/d in April, according to the survey, below its quota under the deal of 10.058 million b/d.

Morgan Stanley analysts say that while Opec has hit its target by cutting as much as 1.4m barrels a day of output to try and support the market, shipping data suggests the group’s exports have declined by less than 1m b/d since the start of the year.

OPEC and non-OPEC oil producers look likely to extend their agreement to limit supplies beyond its June expiry to help clear a glut, three OPEC delegates said on Thursday, downplaying the chance of additional steps such as a bigger cut.

The June crude oil contract on the New York Mercantile Exchange dropped 39¢ on Apr. 24 to close at $49.23/bbl. The July contract decreased 39¢ to $49.58/bbl. The natural gas price for May fell 3.5¢ to a rounded $3.07/MMbtu. The Henry Hub cash gas price was $2.98, down 6¢. The Brent crude contract for June on London’s ICE fell 36¢ to settle at $51.60/bbl. The July contract was down 31¢ to $52.13/bbl. The May gas oil contract declined $1.75 to $465.75/tonne. OPEC’s basket of crudes closed Apr. 24 at $49.64/bbl, down 35¢.

Brent crude futures were at $53.34 per barrel at 0715 GMT (3:15 a.m. ET), up 41 cents, or 0.77 percent, from their last close. U.S. West Texas Intermediate (WTI) crude futures were up 32 cents, or 0.63 percent, to $50.76 a barrel.

"There is consensus building but it's not done yet," he told reporters on the sidelines of a conference in the United Arab Emirates. Asked about non-OPEC producer Russia, Falih replied: "We are talking to all countries. We have not reached an agreement for sure, but the consensus is building."

The crude oil contract for May delivery on the New York Mercantile Exchange fell 53¢ on Apr. 17 to close at $52.65/bbl. The June contract lost 49¢ to $53.11/bbl. The natural gas price for May declined 6.4¢ to a rounded $3.16/MMbtu. The Henry Hub cash gas price closed Apr. 17 at $3.06/MMbtu, up 8¢. The Brent crude contract for June on London’s ICE also declined 53¢, settling at $55.36/bbl. The July contract was down 49¢ to $55.88/bbl. The gas oil contract for May lost 25¢ at $497.75/tonne. The average price for OPEC’s basket of benchmark crudes on Apr. 17 was $52.94/bbl, down 43¢.

OPEC and several other producers including Russia agreed in December to pump less oil in an orchestrated effort to end an oversupply weighing on prices. Compliance with the cuts was more robust in March compared to the previous month, Barkindo said. Brent crude has gained about 19 percent since OPEC decided to pare output, and the benchmark grade was 24 cents higher at $55.13 a barrel at 11:59 a.m. in London.

Iranian Minister of Petroleum Bijan Zangeneh says he believes most members of the Organization of the Petroleum Exporting Countries (OPEC) would endorse extension of the organization's output cut initiative in the upcoming OPEC meeting, adding Iran would also support the cut extension if other members unanimously back it.

The Secretary General reiterated the commendable key role of Iraq, in particular HE Jabbar Al-Luiebi, that was instrumental within OPEC to achieve market stability for both producers and consumers and said Iraq has resumed its leading role in the Organization.