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
Mentioned in: Germany set to miss its own gas target
European Energy MarketsBackground
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.
What kind of gas storage is Uelsen?
Why does Uelsen have a lower gas storage target than other German sites?
When was Uelsen gas storage commissioned?
How safe is Uelsen gas storage's operating record?
Written with AI from Lowdown's published reporting. Not individually reviewed by an editor. Updated 31 July 2026. Editorial standards.