Currently Greece imports gas from Gazprom at a price of between $4.6 and 4.7 /mn Btu, Kitsakos said; from Turkey's Botas at $5.9/mn Btu; and from Algeria's Sonatrach at $6.5/mn Btu. Gas at the Dutch TTF is around $6/mn Btu. However, the price Cheniere will ask for gas is rumoured to be around $7/mn Btu.

The stress test had definitely shown that “we still need additional infrastructure, but not everywhere – we really need to target investment where it's really needed and have the projects of common interest (“PCI's”) and how Europe promotes investments should really be targeted to regions where we do need investments.”

"The practice of filling the market with cheap oil at any cost is wrong -- half a year or a year later it could be sold at twice as high," Leonid Fedun, vice-president of Lukoil, Russia's second largest oil producer, was quoted as saying.

The economy will shrink 1.5 percent this year, Alfa Bank’s Natalia Orlova said in a report on Monday, cutting her previous forecast for an expansion of 0.3 percent.

"Just because I’ve built a pipeline, that doesn't mean that you have to buy my gas, the idea that that somehow it's undermining diversification of sources is just not true."

Nord Stream 2 will be built, according to Gazprom’s chairman of the board, Viktor Zubkov. “This means that customers will receive gas at favorable prices, but for this we need reliable sources of supply and uninterrupted means of transportation,” he said.

Ukraine, once one of Russia’s biggest foreign gas buyers, had a debt of more than $29 billion before Tuesday’s bill, according to Gazprom. Naftogaz has demanded almost $26 billion from Gazprom in Stockholm arbitration, claiming it overpaid for supplies and was paid too little for transit, with a court ruling not expected before the middle of the year.

The country's energy minister, who said in December that the global oil market could return to a balance by the end of 2016, as long as producers do not raise output from current levels, said on Thursday this may not now happen until early 2017.

Nord Stream-2 project would develop rapidly in 2016. The pipeline extension project continues to move ahead, despite opposition to from several European countries

Russia's Gazprom and a group of European companies agreed on the project last year, raising protests mostly among central and southern European countries.