"In 2016, geopolitical challenges will not go away. We have to keep pushing for diversification of energy sources," Sefcovic said, reiterating that the Commission would scrutinize whether the Nord Stream plan complied with EU rules.

The financing problems for the project stems from U.S.-led sanctions against Russia’s oil and natural gas sector over Russia’s invasion of Ukraine in early 2014. Also, in June the EU extended economic sanctions on Russia until January 3, in a move that media said at the time was “keeping up pressure on Moscow to help resolve the Ukraine conflict.”

Gazprom would need to bring spot gas prices below $4 per million British thermal units (mmBtu), versus around $5.65 per mmBtu now, to shut Europe off to U.S. imports - a level Goldman Sachs expects could be reached by 2018/2019.

Gabriel explained that he would ensure that construction of the pipeline would remain legal in the eyes of the German authorities. Gabriel also made it clear that Brussels should have limited involvement with the project.

Tehran has recently strengthened ties with Moscow, which is considering providing two loans worth a total of $7 billion to Iran.

Rosneft, a company led by Igor Sechin, said that in the first nine months of 2015 it produced 45.92 billion cubic metres (bcm) of gas, increased from 40.87 bcm in the same period last year. On Friday, Gazprom reduced its 2015 forecasts to 427 bcm, a significant decrease on its forecasts released six months ago,which expected production for the year to reach 485 bcm.

Russia’s President Vladimir Putin met with Emir of Kuwait Sabah Al-Ahmad Al-Jaber Al-Sabah this week to discuss opportunities for cooperation in the fields of energy and diplomacy. The two countries also signed a memorandum for military technical cooperation.

Saudi Arabia has started shipping crude to traditional Russian markets like Poland and Sweden, but supplies to Europe from the world’s largest exporter won’t increase by enough to reduce prices. In contrast, a surge in Iranian exports after the lifting of sanctions could erode the value of Russian shipments to the region as soon as next year.

“Russia plays a central role in the question of how we Europeans can secure our energy supply,” Schroeder, whose friendship with Russian President Vladimir Putin has been controversial in Germany, said at the Nov. 9 event. “Norway and Russia are the most secure and reliable energy partners for Europe.”

“Russia plays a central role in the question of how we Europeans can secure our energy supply. Norway and Russia are the most secure and reliable energy partners for Europe”, said the former German Chancellor.