Liquefied natural gas (LNG) developer Venture Global LNG Inc. said Thursday it had finalized a deal that would make it the top U.S. supplier of the super-chilled fuel to Poland.

A sale and purchase agreement (SPA) signed Thursday in Warsaw calls for Polish Oil and Gas Co. (PGNiG) to buy 2 million metric tons/year (mmty) from Venture’s two Louisiana facilities for 20 years. That brings the total offtake under contract to PGNiG to 5.5 mmty over 20 years on a free-on-board basis.

“Poland will lower its carbon footprint and diversify its energy mix by incorporating more American natural gas into its portfolio,” Venture CEO Mike Sabel said. “Pivoting toward cleaner natural gas from the United States will not only increase Poland’s energy security but also decrease its carbon...