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Who we are

Storengy UK is a subsidiary of ENGIE, we developed and now operate the Stublach Natural Gas Storage site in Cheshire, the largest in the UK.


Storengy UK

has operated the Stublach Gas Storage Project, a salt cavern storage facility in Cheshire, Northwich since 2007. Now fully completed, the scheme is the largest storage facility in the country, enhancing the security of supply to the UK gas market. Stublach comprises 20 underground salt caverns, created between 2009 and 2018. Each of these caverns stores natural gas over 500 metres below the surface. The salt caverns are formed by pumping water into the ground (solution mining) to dissolve the salt and to create large underground chambers connected to the surface by a series of metal tubes cemented into the overlying rock. The Cheshire salt plains are an ideal geological location for this type of storage. 

Stored gas is drawn from the national transmission system (the network of underground pipes crossing the UK) and stored in the salt caverns until it is required by our customers. A gas compression station is located on the Stublach site to move the gas in and out of the caverns when demand requires. On cold winter days, over 20% of gas supplied to consumers comes from UK storage facilities.  Storengy UK’s 4.4 TWh storage capacity is equivalent to the energy consumption of 0.6% UK (300,000) households.  

The site provides long term employment for 48 members of staff all with varying levels of qualifications and different expertise, everything from engineering, maintenance to commercial and finance. We also provide work for a number of local contractors and suppliers.


Storengy combines all the expertise necessary for the qualification, development and commercialisation and operation of storage sites. The company designs builds and operates all types of underground gas storage (UGS) facilities, and offers its customers top-quality services based on its extensive know-how. Storengy is one of the few operators in the world to combine skills as varied as market analysis, subsurface sciences, drilling and completion techniques, underground reservoir engineering, operation of surface industrial facilities and industrial safety. Relying on this expertise, Storengy has become one of the world leaders in underground natural gas storage. We provide our customers with innovative products through its experience in offering Sales & Marketing services on various markets and their relevant regulatory environment. Storengy develops and operates underground natural gas storage sites in France, Germany and United Kingdom. Storengy, an internationally recognised partner.



Storengy is a subsidiary of ENGIE, ENGIE is committed to responsible growth of its businesses (power, gas and energy services) to succeed in the central challenges of delivering an energy transition to a low-carbon economy: providing access to sustainably generated energy, combating climate change, reducing its effect and making responsible use of natural resources. The Group is developing high-performance, innovative solutions for personal customers, urban authorities and companies by applying its expertise in four key sectors: natural and renewable gas, renewable electricity, energy efficiency and digital technologies.