CO2 Storage in old Danish oil and gas fields

DHRTC is initiating a new CO2 storage research programme with a vision to develop cost effective and low risk CO2 storage in depleted oil and gas reservoirs, tailored for offshore Denmark.

Denmark has an ambition of reducing carbon emissions by 70% in 2030. One of the tools to help deliver on this goal is access to CO2 storage capacity. The old oil and gas fields could be an opportunity to accelerate the permanent storage of CO2 thanks to:

  • A significant well described storage capacity
  • Decades of accumulated knowledge of subsurface behaviour
  • A reservoir seal which has been proven gas tight over geological time
  • Existing infrastructures that may be re-utilised
  • Distance to shore and inhabited areas

DHRTC finalized a CO2 storage State-of-the-Art study in early 2021, identifying knowledge and technology gaps. This gap analysis has been a starting point for defining the scope for the new research programme. The CO2 storage State-of-the-Art study also highlighted that the technology already is mature enough to start up CCS projects, however, research is needed to improve the cost efficiency of storage projects and to focus on specific Danish challenges.

It is expected that the CO2 storage programme will focus on three main topics:

  1. Is chalk suitable as a storage reservoir for CO2?
  2. Cost effective and reliable CO2 monitoring methods
  3. Well barriers in CO2 environment and reuse of existing wells for CO2 injection


Charlotte Nørgaard Larsen
Programme Manager
Centre for Oil and Gas - DTU
+45 93 51 15 36