Comparison of Dry Gas Seasonal Storage with CO2 Storage and Re-Use Potential

Abstract

To make large-scale CO2 storage economic, many groups have proposed using CO2in EOR projects to create value for CO2 storage. However, CO2 EOR projectsgenerally require a large and variable supply of CO2 and consequently may requiretemporary storage of CO2 in geological formations. In order to store CO2 atoffshore sites as a source for CO2 EOR projects, the CO2 needs to be extractedfrom a storage site to a certain extent. Alternatively, CO2 EOR projects maybe developed alongside saline aquifer CO2 storage with only some of the CO2being used for EOR. The idea of temporary storage of CO2 may therefore be akey part of the solution for today?s climate challenge regarding CO2 emissions.Seasonal storage of dry methane gas is a well-established technique, and based onthis project, it can also work for CO2. This project examines the effectiveness ofgeological storage and re-use of CO2 compared to seasonal dry gas storage. Thecontrols on injection and production of CO2 from an ideal storage geological siteis estimated.