Summary
The steady increase in concentration of CO2 in the atmosphere owing to combustion of hydrocarbons is considered a major factor contributing to global warming. Storage of CO2 as subcritical gas in depleted oil and gas reservoirs and deep aquifers is considered a viable mitigation for reducing the impact of global temperature increase as a consequence of increased atmospheric CO2 (Hitcheon 1999, Bachu 2008).
More knowledge is needed to be able to assess:
- the quantity of CO2 trapped as minerals during CO2 storage
- the amounts of major and trace elements which might be mobilized as ions during CO2 storage, and
- how the mechanical strength of different reservoir rocks might be affected during storage of CO2.
