The agreement will see the US provide the EU with extra gas, equivalent to around 10% of the gas it currently gets from Russia, by the end of the year.
The bloc has already said it will cut Russian gas use in response to Russia’s invasion of Ukraine.
Russia currently supplies about 40% of the EU’s gas needs.
The new deal will involve the US and other countries supplying an extra 15 billion cubic metres of gas on top of last year’s 22 billion cubic metres.
The new total will represent around 24% of the gas currently imported from Russia.