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Turning a brownfield site into an innovative project part of a sustainable ecosystem

Case of an undergound gas storage
Life On Land; Industry, Innovation, and Infrastructure; Sustainable Cities and Communities; Climate Action; Responsible Consumption and Production


Storengy, subsidary of Engie, is one of the world leaders in gas storage service with 21 sites in France, UK and Germany including 14 storage sites in France. Storengy supplies 11 millions of gas consumers in France during winter and cold peaks. Storengy is also involved in neutral carbon transition with the development of green gas (biomethane, hydrogen, e-methane), renewable energy (geothermy) and actions for biodiversity protection.

For more than 50 years, the site at Soings-en-Sologne was used to store natural gas underground. During the last decade, demand for gas storage has been decreasing in Europe. The economic situation led to shut down 3 sites in France among which our Soings-en-Sologne site after 50 years of operations. 

Our challenge 

We already stopped storing gas on the site and are now looking at transition alternatives in co-creation with local actors: we do not want to dismantle the site in Soings-en-Sologne and leave it without cany care for future generations. Our challenge is to give a new birth to the site of Soings-en-Sologne by turning it into an asset for its local environment, creating economic and/or environmental value. Strongly engaged into the energy transition, we could give priority to a project such as R&D energy demonstrator, green gas production (biomethan, green hydrogen, e-methane), photovoltaic production, geothermic solutions, etc.. All new ideas will be welcomed if they are useful and acceptable for the local community. The goal is to generate value by using the existing infrastructures of the site as much as possible. 

Expected impact

By turning the site’s use into a new project, the aim is to maintain its value creation for local community: job creation, energy transition, contribution to local taxes etc.

Targeted groups

Public actors (regional and local communities, agriculture and industrial chambers…), private actors (students, farmers, industrials, start-ups, energy clusters…) and civil society (residents, NGOs…) must be involved in this project in one way or another.

Deadline for applications : 2020-12-31