The European Union's plans to raise its gas storage levels ahead of winter just a day after agreeing to a deal to reduce usage could be disrupted.
The 20% of the total capacity that was operating was down from the 40% that was operating a month ago.
Russian state-run gas giant Gazprom is facing issues with some of its equipment that have been disrupted by European sanctions, but it is sending as much as needed and possible, according to the Kremlin's spokesman.
The European Union's plans to have at least 80% of its gas storage capacity filled by the start of November could be jeopardized by the drop in supplies.
According to a report by Royal Bank of Canada analysts, Europe will need gas supply from Russia to be 25% of its capacity to meet its storage targets.
The Dutch TTF Gas Futures was up 3% on Wednesday at 206 per megawatt hour, more than double what it was at the beginning of June.
The rate was 67.11%. The official tracker shows the percentage of Europe's total gas storage capacity that is currently full.
On Tuesday, member nations of the European Union agreed to cut their usage of gas by as much as 15% to deal with the current crisis and reduce its dependence on Russia. In August, there will be a voluntary reduction in the use of gas to generate electricity. Some member states that rely on gas to generate electricity are not connected to the EU's grid. Russia has been painted as a form of blackmail by European officials. Europe's energy sector could be in danger of collapsing due to a supply crunch during the winter.
Europe makes savings pleas as Russia cuts gas flows.
The EU finally struck a deal to cut gas demand.