A comparative analysis of risk assessment methodologies for the geologic storage of carbon dioxide

Abstract

This paper offers a broad summary of the most common risk assessment methodologies for the geologic storage of carbon dioxide. We believe it is valuable to compare these methodologies, particularly in the areas where they lead to similar conclusions. The objective of this paper is to provide a better understanding of the current similarities and differences of these proposed methodologies. Since CCS was proposed as a mitigation option for reducing anthropogenic CO2 emissions, several attempts have been made to study the potential risks of long-term storage of CO2 in geological formations. Various worldwide projects have tried different industrial methods adapted to GSC. In spite of these efforts, currently there is no standardised method or set of methods for evaluating risk and/or uncertainty for GSC projects. Application or adaptation of advanced industrial quantitative risk assessment methods seems not convenient at this point because of lack of specific data. The development of frameworks and qualitative methods looks the most trustable for current projects.