Case
Carbon capture, storage and utilisation
Energinet is an independent public enterprise owned by the Danish Ministry of Climate, Energy and Utilities. We own, operate and develop the transmission systems for electricity and natural gas in Denmark.
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Photo credit: Gas Storage Denmark
Geological formations in Denmark’s subsurface offer significant potential for safe and permanent storage of captured CO₂. Stenlille is home to one of Denmark’s two underground natural gas storage facilities operated by Gas Storage Denmark
By mid-2025 Gas Storage Denmark launched a maturation project uncovering the technical, regulatory and commercial foundation for a CO₂ storage project at its existing natural gas storage site in Stenlille. The site is based on a sandstone reservoir suitable for gas injection and withdrawal.
A key delivery of the maturation phase is to establish a better understanding of how the potential co-existence of the existing natural gas storage facility and a new CO₂ storage facility is to be investigated further in a CO₂ exploration phase. This is important when designing a CO₂ storage facility in Stenlille that does not compromise the ability to continue operating the existing natural gas storage facility.
Gas Storage Denmark will be in close dialogue with Danish authorities on this subject.
The result of the maturation phase will be a work program for exploring the ability of the Stenlille subsurface for safe and permanent storage of CO₂ .
In the end of the maturation phase the internal stakeholders of Gas Storage Denmark and Energinet will be presented with an updated business case providing the foundation for the decision on whether to continue the efforts towards establishing the onshore CO₂ storage project.
