A day after Europe laid out plans to cut its reliance on Russian energy by diversifying its supplies, leading U.S. liquefied natural gas (LNG) exporter Cheniere Energy Inc. said French utility Engie SA would buy more of the super-chilled fuel under an expanded agreement.

Cheniere said Engie agreed to increase the volumes and extend the duration of a supply contract signed last June. Under the amended sales and purchase agreement, Engie would purchase 0.9 million metric tons/year of LNG from Cheniere for a term of 20 years. 

Engie agreed in June to purchase 0.4-1.2 mmty for an 11-year period, according to documents filed with the U.S. Department of Energy. 

“This SPA reflects the importance of a diverse and reliable long-term supply of natural gas for Europe and reinforces...