Welcome to Greenstore
- An important step towards achieving Denmark's climate goals
About Project
The area between Randers and Hobro has been selected by the Danish authorities as a potential site for underground CO2 storage. Over the coming years, we will gather detailed information about the subsurface to determine whether the area is suitable for establishing a CO2 storage facility.
By storing CO2 several thousand metres underground, the Greenstore Project could potentially reduce Denmark’s annual CO2 emissions to the atmosphere by up to five million tonnes. The project is an important step towards achieving Denmark’s and the EU’s climate goals.
What’s new
Thorough data collection will determine whether the area is suitable for geological CO2 storage
Before a final decision is made on establishing a CO2 storage site in the Greenstore area, we need to gather more detailed knowledge about the many layers of subsurface between Randers and Hobro.
Over the coming years, we will collect in-depth geological data – including through extensive and advanced seismic surveys – to build an accurate picture of the underground layers down to a depth of 3,500 metres. The first surveys are expected to begin in autumn 2025.
The results of the seismic studies will provide the knowledge needed to assess whether the subsurface is as weel-suited for CO2 storage as the Geological Survey of Denmark and Greenland (GEUS) and our own experienced geologists and geophysicists expect. See more on GEUS’ website here.
“Being trusted with the Greenstore project in the summer of 2024 was a great vote of confidence. We are now taking on a vital task: finding out whether the underground conditions here are in fact suitable for storing CO2. Before we can make any decisions, we need to gather as much knowledge as possible – including through thorough investigations of the many deep geological layers. We approach this work with great respect for both the area and the people who live here,” Steinar Kolstø, Danish Country Manager at Harbour Energy.
Unique Danish underground
In Denmark, we have always used our subsurface for a wide range of purposes – to the benefit of both local communities and the country as a whole.
Dansk Salt in Mariager has been extracting salt from a salt dome 1.5 kilometres underground since the 1950s. The salt dome was formed 250 million years ago, and today, Dansk Salt produces around 600,000 tonnes of salt anually.
Underground gas storage is not a new concept either. To safeguard Denmark’s energy supply, we have stored gas in deep geological formations for over 30 years. Gas Storage Denmark operates natural gas storage facilities both in Zealand and in Northern Jutland, west of Hobro. Denmark’s subsurface is particulary well suited for this purpose – not least because of the thick, dense clay layers that prevent gas from leaking back to the surface.
This extensive knowledge of the geological structures beneath our feet is one of the reasons why the Danish government has decided to explore the potential for establishing CO2 storage sites in Denmark. Our underground conditions are suitable and we already have valuable experience from existing gas storage operations to build on. The goal of permanent CO2 storage is to create a better climate and help meet our ambitious climate goals. A CO2 storage site in the area between Randers and Hobro could play an important role in achieving that.
Learn more about CO2 capture and storage in the video below
CO2 storage is an important technology in the fight against climate change and plays a key role in Denmark’s green transition. If you want to understand how it works – and which solutions are already in use or on the way – you can find more information below:
- www.co2idybden.dk – A directory of public and private companies working with CO2.
- GEUS.dk – The Geological Survey of Denmark and Greenland
- Danish Energy Agency – Information about CO2 capture in the energy sector.
- Danish Ministry of Climate, Energy and Utilities (KEFM) – Overview of political initiatives and legislation.
Frequently asked questions
Carbon Capture and Storage (CCS) is a term for the capture, transport and storage of CO2. In 2021, a broad majority in the Danish Parliament decided that CCS should be a key tool in Danish climate policy to help us reach our ambitious climate targets and contribute to achieving the international goals of the Paris Agreement. If you want to know more about CCS, you can read more on GEUS' website here.
CCS is not a new technology, but has been around for more than 40 years. The technology has proven effective and more than 200 million tonnes of CO2 have been captured in the time it has been in use. In 1996, a capture plant was installed in the Norwegian North Sea, which has since captured and stored 1 million tonnes of CO2 annually.
CO2 storage is regulated by national and international laws, including the Danish Subsoil Act, the EU Directive on Geological Storage of CO2 and the Environmental Assessment Act.
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