Turkey's relationship with Russia is changing significantly. A domestic economic crisis, low energy prices and European energy diversification efforts have weakened Russia.

Brussels will on Wednesday accuse Russia’s Gazprom of illegal abuse of its dominant position in Europe’s gas market, unveiling antitrust charges that threaten to inflame already difficult relations with Moscow.

The UK is to force Russian billionaire Mikhail Fridman to sell a dozen North Sea gas fields owned by his $10bn energy fund L1 Energy, giving him just three months to comply or lose operating rights.

On December 1 2014, during his official visit to Turkey, Russian President Vladimir Putin announced the suspension of South Stream, blaming the EU for its “unconstructive” position. In fact, the realization of pipeline had become untenable as a result of various legal, political and financial issues, such as the EU’s Third Energy Package, the Ukraine crisis and the ensuing sanctions over companies involved in South Stream (Stroytransgaz and Gazprombank).

Russia will continue to provide competitive natural gas deliveries to Europe until mid-2020 and there is a limited possibility that other sources including LNG supplies, will offset Russian imports significantly, participants at the Flame conference in Amsterdam said Tuesday.

Russia has been holding active, "unprecedented" consultations with the Organization of Petroleum Exporting Countries, a senior official said on Wednesday, a clear signal of Moscow's strive for higher oil prices.

Russia is pushing ahead with plans to build a pipeline to Turkey and further on to Greecevia the Black Sea, in line with its plans to stop exporting gas via Ukraine by 2019.

On March 16, the presidents of Turkey, Azerbaijan and Georgia travelled to Kars in Turkey’s mountainous northeast, and then to a remote worksite near the border with Georgia, to launch construction of the 1,850km Trans-Anatolian gas pipeline (Tanap).

The rebalancing of the global oil market may still be in its early stage with the outlook “only getting murkier”, according to the International Energy Agency, as uncertainties remain about demand and supply responses to the steep drop in prices.

Russia is the main supplier of crude oil and natural gas to the EU, and although diversifying away from Russian gas is not unrealistic in the medium term, several technical and political obstacles must be overcome.