Comprehensive investigations of the subsurface in Nekselø Bugt begin today. The purpose is to map whether CO2 can be stored safely and permanently 1,400 meters below the seabed as part of Denmark's climate efforts. This is stated in a press release by CO2 Storage Kalundborg, which Equinor, Ørsted and Nordsøfonden are jointly behind.
Approximately 2,000 hydrophones have been placed on the water surface, and five ships have been set up to send sound waves into the subsurface. The waves are reflected back to the hydrophones, which enables detailed 3D mapping of the area.
- A precise picture of what it looks like all the way down to a depth of 1,400 meters must be made. With sound waves, the surveys are gentle and take into account both nature and the environment, says project manager at CO2 Storage Kalundborg Ulrik Olbjørn.
The surveys are being carried out by the Polish contractor Geofizyka Torun, which has specialized in mapping the subsurface in more than 50 countries.
The mapping on the water is the first step in the CO2 Storage Kalundborg project. Similar surveys on land using geophones and vibration vehicles will soon begin. The entire survey phase is expected to last four years, after which the authorities will decide whether CO2 storage can be implemented in the area.
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