OPEC will decide formally whether to extend the cuts when its ministers meet in Vienna on May 25. The producer group and other major suppliers including Russia agreed last year to cut their collective production by about 1.8 million barrels a day for the first half of 2017 in an effort to reduce bloated global stockpiles and re-balance the market.

North Sea Brent crude oil spot prices averaged $52 per barrel (b) in April, $1/b higher than the March average and the fifth consecutive month that Brent crude oil spot prices averaged between $50/b and $55/b. EIA forecasts Brent prices to average $53/b in 2017 and $57/b in 2018. West Texas Intermediate (WTI) crude oil prices are forecast to average $2/b less than Brent prices in both 2017 and 2018.

Investors cut their bullish bets on the oil price to the lowest level since OPEC reached a deal to cut output last year, amid continued doubts about the effectiveness of that agreement.

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.

Nigeria’s oil production level has recovered to 2 million bopd, Nigerian National Petroleum Corporation (NNPC) Group Managing Director Maikanti Baru said late on Tuesday.

"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 seven major onshore producing regions in the US are expected to collectively increase oil output by 124,000 b/d month-over-month in May to average 5.193 million b/d. Gas production from the seven regions is forecast to gain 501 MMcfd month-over-month in May to 50.089 bcfd. The Permian is expected to rise 159 MMcfd to 8.135 bcfd, while the Eagle Ford is projected to increase 84 MMcfd to 5.936 bcfd.

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.

"Iran needs billions of dollars of investment to boost crude oil production and natural gas capacity," said Mehdi Varzi, a former official at state-run National Iranian Oil Company and now an independent consultant.