The talks will be Opec's second attempt since the oil market crash to agree a deal to freeze supply. But negotiations are complicated by the defiance of Iran, which is eager to reclaim its share within the global oil market after years of sanctions that hindered its growth.
Mr Putin has come out in defence of Iran, saying the country should be allowed to boost its oil output - but that a deal for the rest of the cartel should be possible with Russia’s co-operation.
“Iran is starting from a very low position, connected with the well-known sanctions in relation to this country. It would be unfair to leave it on this sanctioned level,” he said.
“From the viewpoint of economic sense and logic, then it would be correct to find some sort of compromise.
“I am confident that everyone understands that. We believe that this is the right decision for world energy,” he added.
Mr Putin also hinted that without a deal Russia’s oil output could rise.
“The oil companies, they are continuing to invest. Our oil output is increasing,” he said.