Quality Ranking of the Best CO2 Storage Aquifers in the Nordic Countries

Abstract

Ranking of CO2 storage sites in the Nordic countries has previously been reported from the NORDICCS project. The ranking was based on geological characteristics of reservoir and seal, data coverage and safety evaluation of the storage complex. Estimated storage capacity were included but not taken into account in the ranking except if two storage sites were equally ranked. This paper presents a method for evaluating knowledge gaps for a storage site based on characterisation and assessment criteria presented in the EU CCS Directive, and a new updated ranking is presented where knowledge gaps are taken into account.