He did not give any further details on the deal. Russian oil major Rosneft is in talks with several players about participation in Vostok, which according to initial estimates could require an investment of more than 10 trillion roubles ($137 billion). Global commodities trader Trafigura has a 10 per cent stake in Vostok Oil and a consortium of traders Vitol and Mercantile & Maritime have shown interest in taking a 5 per cent stake in the project. Indian Oil Minister Hardeep Singh Puri, who is in Russia for an economic forum, met Russian Energy Minister Nikolai Shulginov and Rosneft chief Igor Sechin. The forum in the Russian Pacific port of Vladivostok was also attended by Russian President Vladimir Putin. "Look forward to further strengthening strategic cooperation across the entire value chain of the energy sector with Russia," the Indian minister said on Twitter after meeting Shulginov. Gupta said Russia was a "preferred destination" for energy investment by India.