About Greenstore
Greenstore is a CO2 storage project awarded in June 2024 by the Danish authorities to Harbour Energy, INEOS Energy and the state-owned subsurface company, Nordsøfonden. The purpose of the project is to investigate whether the subsurface between Randers and Hobro is suitable for geological CO2 storage.
Greenstore is backed by three experienced players in the energy sector.
Harbour Energy is the project operator and holds 40% stake in Greenstore. With many years of experience in onshore energy production, Habour Energy is also the largest CO2 storage operator in Europe.
INEOS Energy also owns 40% of Greenstore. INEOS has extensive experience with offshore energy production and is leading Project Greensand, which focuses on CO2 storage in the Danish North Sea.
Nordsøfonden owns the remaining 20% of Greenstore. As the Danish state’s subsurface company, its role includes ensuring that the project creates value for society.
The consortium brings together strong expertise – from geology and seismology to advanced modelling and monitoring. This knowledge is essential for assessing and developing CO2 storage solutions that are both safe and long-lasting.
Potential for Danish business
Opportunities for local business
Throughout the course of the project – from the initial studies to potential construction and operation – there will be opportunities for local businesses to supply goods and services. Harbour Energy is comitted to strengthening its dialogue with the local business community by providing regular updates and participating in local networking events.
Local CO2 storage is an advantage for Jutland-based industries
Jutland is home to a large share of Denmark’s heavy industry, including cement factories, power plants and waste-to-energy facilities. These are essential businesses that we depend on. Like all other companies, they must reduce their CO2 emissions, but the nature of their production makes it particulary difficult. For them, CO2 capture and storage is critical. Having a local CO2 storage site would make it far more affordable for these companies to store captured CO2, compared to the high cost of transporting it abroad. This can help strengthen the competitiveness of Danish manufactures and secure local jobs.
About the project
Safe underground
Safety is the number one priority
In 2023, the Geological Survey of Denmark and Greenland (GEUS) conducted a comprehensive survey of Denmark’s subsurface to assess the potential for CO2 storage. The survey identified five suitable areas, including the area between Randers and Hobro. The Greenstore project has been granted permission to investigate the area further to evaluate the potential for establishing a CO2 storage site.
Storage at a depth of 2.5 kilometres
Optimal underground conditions
The area between Randers and Hobro has particularly suitable geological conditions for CO2 storage. At depths between 2,000 and 3,000 metres, there are two distinct sandstone formations capable of holding CO2. A 900-metre-thick layer of shale and claystone encloses the stored CO2 and acts as a natural, impermeable seal that prevents it from migrating to the surface.
Large storage capacity
An important part of the green transition
GEUS estimates that the subsurface in the Greenstore licence area may have a total storage capacity of up to 250 million tonnes of CO2. This corresponds to Denmark’s entire CO2 emissions over the past 10 years, making the area an important part of the green transition.
The phases of the project
Harbour Energy has committed to a comprehensive work programme approved by the Danish Energy Agency. You can read more about the different phases of the project below.
2025
May-June
Landowners will be notified via e-Boks
June-September
3D Seismic: Planning
September-December
3D Seismic: Data collection
2026
January-March
Drilling rig setup and first exploratory drilling
April-June
Second and third exploratory drilling
October-December
Assessment of whether the project can be carried out
2027
January-March
Apply for storage permit or cancel the project
2028
Second half of the year
Approval by authorities
2029
First half of the year
Possible first CO2 injection if approved by authorities