CO2 Storage

Locations for CO2 Geological Storage

CO2 storage can be the end result of capturing the CO2 as a by-product in energy production operations and/or disposal operations.  The most suitable sites for cost-effective long-term emissions storage in Canada include:

  • oil reservoirs in enhanced hydrocarbon recovery
  • coal beds in enhanced coalbed methane recovery (ECBM)
  • depleted oil and gas reservoirs
  • deep saline aquifers
  • salt caverns (mainly as a buffer in CO2 collection and distribution systems)

Prior to injection, each individual storage site is carefully examined to analyze the geological characteristics of the site, including all layers of the subsurface up to ground level. Multiple layers of dense, non-porous rock ensure CO2 remains in the storage formation. This image to the right, drawn to scale, shows the injection site of CO2 2,000m below the surface.  (Images © University of Regina, 2009)

CO2 becomes trapped in tiny pores, often undetectable by the human eye, in the rock formation 1,500 m or deeper in the subsurface.
(Images © University of Regina, 2009)



  • Once CO2 is captured and compressed, the CO2 is transported by pipeline or tanker to a storage site, often to be injected into an underground storage site (or geological formation), where it will be safely stored for the long-term. 
  • by injecting CO2 into depleting wells it can enhance the recovery of oil, gas and coalbed methane.
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