Brent crude futures were down 39 cents, or 0.5 percent, at $71.79 at barrel. WTI crude futures for July delivery were down 59 cents, or 0.9 percent, at $62.54.

Brent crude futures, the international benchmark for oil prices, were at $72.31 per barrel at 1030 GMT, up 34 cents, or 0.5 percent, from their last close. U.S. West Texas Intermediate (WTI) crude futures were up 42 cents, or 0.7 percent, at $63.52 per barrel.

Following its 14th Meeting, which took place on 19 May 2019, in Jeddah, the Kingdom of Saudi Arabia, the Joint Ministerial Monitoring Committee (JMMC) has reaffirmed its commitment to achieving a balanced market and working towards oil market stability on a sustainable basis with solid fundamentals.

"We want to bring inventories down to a more normal levels," Falih said. "We need to stay the course and do that in the weeks and months to come."

Russia sees a range of options that would allow OPEC+ to continue output cooperation until year-end, from easing the limits to ending the extreme throttling-back that has seen some countries exceed original cutback targets.

"Work to increase production to full capacity will continue, and in early June Kashagan should reach production levels of 370,000-400,000 b/d due to the work carried out during the maintenance," it said.

Brent crude was up by 90 cents, or 1.3%, at $73.11 a barrel, U.S. West Texas Intermediate crude was up 71 cents, or 1.1% higher, at $63.47 a barrel.

OPEC+ would take action to offset losses of Iranian supply if market fundamentals justified it. However, no policy changes will be made until the next full OPEC+ meeting in Vienna, in June.

Crudes are being priced at Dated Brent discounts between $15/b and $17/b, FOB, according to a PDVSA report.

Iran has sent abroad between 250,000 bpd and 500,000 bpd of oil so far in May, according to two industry sources who track the flows. Data from Refinitiv Eikon put crude shipments at about 250,000 bpd and exports of crude and condensate, a light oil, at about 400,000 bpd.