Rosneft's access to Western money has been restricted by the sanctions imposed in response to Moscow's role in the Ukrainian conflict. Rosneft has asked the government for $42 billion support from a fund earmarked for Russian pensions to help it weather the sanctions.

Dvorkovich said that Rosneft had yet to apply formally for help from the National Wealth Fund and that it must define the projects for which it needs money from the fund.

"Everyone has the right to apply to the Economy Ministry and to define its projects (for help from the fund). Rosneft has not applied to us about such projects. There have been only general proposals," he said.

"We will look at (Rosneft's request) seriously," he said.

Last year, Rosneft's Chief Executive Igor Sechin said Rosneft needed $0.5 trillion to develop Russian Arctic fields. Analysts from Merrill Lynch said the Arctic program had long been seen as one of the bright spots of Russia's future economic development.

Dvorkovich declined to reveal the details of Rosneft's investment program, which stood at around 600 billion roubles ($15.5 billion) in 2013 and which had been expected to rise to 730 billion roubles for 2014.

"Rosneft's investment program was discussed during prime minister's meeting. On the whole, it was approved. There are some nuances on timing of the program," Dvorkovich said.

(Reporting by Darya Korsunskaya; writing by Vladimir Soldatkin, editing by Thomas Grove and Jane Merriman)

By Darya Korsunskaya