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Chémery
The Chémery underground natural gas storage site is located 30 kilometres south of Blois in the Loir-et-Cher department. With a capacity of seven billion cubic metres, the Chémery storage site is one of the largest and deepest in Europe. It is the largest storage site in France in terms of capacities and the second largest in Europe.

The location of the Chémery facilities was chosen to reduce the environmental impact. They have a rainwater collection system and a waste sorting and disposal system. The atmospheric emissions and noise pollution have been reduced by improving operation of the compressors as well as their installation in a closed building.

Chémery may supply a volume of natural gas equal to 25 years' consumption of a city like Orléans or the equivalent of five years' consumption of the whole Centre region of France.

Technical characteristics:
Type: aquifer storage
Commissioning: 1968
Type of gas stored: type H (high calorific)
Geological strata: triassic
Reservoir depth: 1,085 metres
Number of operation wells: 67
Number of control wells: 26
Maximum storage volume: 7 billion m³ at STP*

 

Soings-en-Sologne
The Soings-en-Sologne underground natural gas storage site is located 30 kilometres from Blois near the Chémery site from where it is operated.

Designed to blend with its environment, the Soings-en-Sologne site facilities are perfectly integrated into the Sologne region's landscape.
In operation since 1981, the Soings-en-Sologne site features a geological structure composed of two domes each of which contains part of the natural gas stored. This site was mothballed in 2012.

Technical characteristics:
Type: aquifer storage
Commissioning: 1981
Geological strata: triassic
Reservoir depth: 820 metres
Number of operation wells: 10
Number of control wells: 18
Maximum storage volume: 1,138 million m³ at STP*

*m³ at STP = cubic metres at standard temperature and pressure: quantity of natural gas which at 0°C and under atmospheric pressure occupies a volume of one cubic metre.

 

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