Nüttermoor cavern storage facility:
1.25 thousand million cubic metre of natural gas
At Nüttermoor near Leer in north-western Germany, EWE GASSPEICHER GmbH operates 21 natural gas storage caverns. The caverns are located in a salt dome in the Zechstein formation.
Since the beginning of the project in 1976, KBB (renamed KBB Underground Technologies GmbH after 2004) was responsible for all planning and supervising activities. Until 2005, KBB also took care of the solution mining operations. KBB/KBB UT performed all material planning and supervising activities from constructing the above-ground solution mining and gas facilities and drilling cavern wells (including geological evaluations) to completion including gas tightness testing, initial gas filling and snubbing.
In the course of operations, the project was expanded by additional caverns and operating facilities and modernised. Since 2012, 21 caverns with a working gas volume of approximately 1,250 million cubic metres are available.
Apart from constructing new caverns, KBB UT also re-leaches and upgrades existing caverns according to the latest state-of-the-art.