"All the experts in the markets believe that we have an oversupply on the market and next year we will have more oversupply," Iran's Oil Minister Bijan Namdar Zanganeh told reporters.
But Zanganeh said it was not solely up to the Organization of the Petroleum Exporting Countries to tackle the oversupply which is sending crude prices crashing to four-year low points.
"To deal with this situation we need to have a contribution from non-OPEC producers for managing the market," he told reporters on arrival in Vienna, where the cartel is headquartered.
The cartel, which pumps out about one-third of the world's oil, is under pressure from its poorer members like Venezuela and Ecuador to cut output as tumbling prices have slashed their precious revenues.
However the cartel's Gulf members, led by kingpin Saudi Arabia, have rejected calls for a cut unless they are guaranteed market share in the highly competitive arena.
And some analysts believe that the cartel will tomorrow agree to trim such excess rather than cut its official ceiling.
"There remains little prospect of any production cut being agreed at tomorrow's OPEC meeting," Commerzbank analysts said in a note to clients today.
"This was also made clear this morning by Saudi Arabia's Oil Minister (Ali) al-Naimi, who spoke out in Vienna against a production cut, going on to say that the oil market should stabilise itself instead.