Dugny-Le Bourget geothermal plant (2024-2026)
Coriance's subsidiary Energie verte de Dugny-Le Bourget drilled a similar doublet to serve Dugny and Le Bourget, including Paris-Le Bourget Airport. The wells reached about 1,700 meters into the Dogger formation in roughly three months, and commissioning is set for spring 2026.
The plant will serve more than 9,000 equivalent dwellings, including the airport, with heating rates about 25% below gas.
It shows Coriance running the same geothermal playbook across several towns at once.
Both projects are Coriance efforts tapping the same aquifer around the same time, so Aulnay-sous-Bois is one node in a wider Paris Basin build-out.
