OPEC President Algeria has proposed bringing forward the next meeting of the oil producing group and its allies, known as OPEC+, to June 4 from an earlier plan to hold it on June 9-10, according to a letter from Algeria to OPEC+ members seen by Reuters.
Algeria's energy minister, Mohamed Arkab, said in the letter that he had held discussions with "some ministers" about bringing forward the dates, which would help "facilitate nominations".
The term "nominations" is used by OPEC's de facto leader Saudi Arabia as well as Iraq and Kuwait to allocate crude to traditional buyers depending on demand. The nominations take place around the 10th of every month.
In April, OPEC+ decided to cut its production by a record 9.7 million barrels per day, or 10 per cent of global output, to lift prices battered by a drop in demand because of lockdown measures to stop the spread of the coronavirus.
A drop in OPEC+ production combined with a record decline in output from non-members such as the US and Canada helped lift oil prices towards $35 per barrel, although they remain at only half the levels seen at the start of the year.
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Sources have told Reuters that Saudi Arabia is proposing to extend record cuts from May and June until the end of the year but it has yet to win support from Russia, which believes curbs could be gradually eased.
On Friday, a monthly survey by Reuters showed OPEC's oil output hit its lowest in two decades in May as Saudi Arabia and other members delivered record supply cuts.
However, the survey showed the overall compliance was around 75 per cent because Nigeria and Iraq failed to fully comply with their share of reductions.
Arkab said in his letter the low compliance rates "may have an adverse impact as soon as markets are open on Monday".
"The initiative of some esteemed ministers to correct these figures shall be praised. It is very constructive if positive messages could be shared by all with regards to the commitments made," the letter said.