Skip to content
You can now search across every topic, entity and event.What's new
Uelsen
Nation / PlaceDE

Uelsen

Storengy's largest German pore gas storage site; one of six given a reduced 45% fill target.

Uelsen, near the Dutch border in Lower Saxony, is Storengy Deutschland's largest pore storage site in Germany at some 860 million cubic metres; commissioned in 1997, it has held a reduced 45% fill target since 5 May 2025.

Last refreshed: 31 July 2026 · Appears in 1 active topic

Timeline for Uelsen

View full timeline →
Follow European Energy Markets →

Background

Uelsen draws gas through seven boreholes into Triassic sandstone around 1,490 metres down, a depth and scale that make it the largest pore-type site in Storengy Deutschland's German portfolio, part of the Engie group. It has operated since 1997, with a working gas volume of roughly 860 million cubic metres, sited in Lower Saxony close to the Dutch frontier.

It shares its regulatory tier with five other named sites: the Gasspeicherfüllstandsverordnung sets Uelsen a 45% fill target for 1 November rather than the 80% that applies to most German cavern storage.

Common Questions
What kind of gas storage is Uelsen?
Uelsen is Storengy's largest pore gas storage facility in Germany, in Lower Saxony, with a working gas volume of around 860 million cubic metres.Source: Storengy
Why does Uelsen have a lower gas storage target than other German sites?
It is one of six pore-storage sites named in Germany's Gasspeicherfüllstandsverordnung with a reduced 45% fill requirement for 1 November, instead of the 80% target most cavern sites must meet.Source: Bundeswirtschaftsministerium
When was Uelsen gas storage commissioned?
Storengy Deutschland brought the Uelsen pore store into service in 1997, converting a depleted natural gas field roughly 1,490 metres down in the Grafschaft Bentheim district.Source: Storengy
How safe is Uelsen gas storage's operating record?
Storengy reported over 9,000 accident-free operating days at Uelsen, close to 25 years without a reportable incident at Germany's largest pore storage site.Source: Storengy