Venezuela has expressed interest in an Iranian move which seeks to ask buyers to pay for oil in euro rather than US dollars.
The oil-rich nation said it planned to see if a similar scheme could be introduced to its crude exports.
Iran, which is the world's fourth-biggest oil producer, has already asked customers to pay for its oil in euro because of the current weakness of the dollar.
Although the dollar is the currency in which oil is usually traded, it has been falling in value against the euro.
Venezuela and Iran, which have strained political relations with Washington, are both members of the oil producers' cartel, Opec.
