The funds, equivalent to about $3.2 billion, will be used "to implement measures aimed at ensuring the stability of the economy in the face of external sanctions," the Russian government said in a statement. It will fund the boost in reserves via "additional oil and gas revenues received in the first quarter of 2022," the statement continued.

The Russian government's reserve fund was set up to finance unforeseen expenses and significant measures that were not factored into the national budget, according to the Kremlin's statement.

Russia is an energy powerhouse. The country accounts for 45% of the European Union's gas imports, according to the International Energy Agency. Energy prices have soared this year on the back of the Ukraine war amid fears of trade disruptions over infrastructure damage and sanctions against Russia.

The EU is trying to wean itself off Russian energy — it's banning Russian coal and is considering an oil embargo — but hasn't mentioned a ban on natural gas. Germany, Europe's biggest economy, is particularly reliant on Russian gas.

The EU has paid $38 billion for Russian energy, a top EU official said Wednesday. That has helped contribute to Russia's foreign-exchange reserves, which rose marginally for the week that ended April 1, the Russian central bank announced Thursday.

The ratings agency S&P Global on Saturday downgraded Russia's foreign-currency payments to a "selective default" after Moscow paid a dollar-denominated debt in rubles last week. 

The Russian economy is still expected to contract 11.2% in 2022, the World Bank said in a report released Sunday. The country's March oil and gas revenue was also 38% lower than Russia's finance ministry forecast on March 3, according to data from the ministry, published Tuesday.

Russian President Vladimir Putin's former chief economic advisor recently told the BBC that Russia would end the war in Ukraine within a month or two if Western countries imposed "a real embargo on oil and gas exports from Russia."

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