Hydrodynamics and Geochemical Modelling of CO2 Injection at the K12B Gas Field

CO2 storage in a depleted gas field: An overview of the CO2CRC Otway Project and initial results

“…These sites provide the advantage of being relatively data-rich and often have demonstrable containment security of the previously held hydrocarbon reserves. The K12B field in the North Sea (Vandeweijer et al, 2009;Audigane et al, 2007) is an early example of this type of storage where not only carbon storage, but also enhanced gas recovery has been examined. The Cooperative Research Centre for Greenhouse Gas Technologies (CO2CRC) Otway Project in Australia is the first heavily monitored pilot site for CO 2 storage in a depleted natural gas reservoir.…”

Reply to discussion on the paper titled “Effect of reactive surface area of minerals on mineralization and carbon dioxide trapping in a depleted gas reservoir”

“…However, as the authors correctly point out, our modeling software has limitations since TOUGHREACT modules which can handle both CO 2 and CH 4 in one geochemical simulation are not (yet) publically available. We do appreciate the suggestion of workarounds by using multiple TOUGH EOS modules, as applied in previous studies (Audigane et al, 2009;Tambach et al, 2014). Audigane et al (2009) found an elegant approach by using two independent modeling scenarios in parallel: in Case A the module TOUGHREACT-ECO2N is applied, considering brine and pure CO 2 only, in order to estimate mineral trapping from geochemical reactions.…”

“…We do appreciate the suggestion of workarounds by using multiple TOUGH EOS modules, as applied in previous studies (Audigane et al, 2009;Tambach et al, 2014). Audigane et al (2009) found an elegant approach by using two independent modeling scenarios in parallel: in Case A the module TOUGHREACT-ECO2N is applied, considering brine and pure CO 2 only, in order to estimate mineral trapping from geochemical reactions. In Case B the module TOUGH2-EOS7C is applied on a mixture of brine, CO 2 and CH 4 in order to model structural and solubility trapping of CO 2 in combination with enhanced gas recovery.…”

Ex Situ Dissolution of CO2: A New Engineering Methodology Based on Mass-Transfer Perspective for Enhancement of CO2 Sequestration

“…Geochemical reactions play important roles when evaluating effects of CO 2 storage long term. The major geochemical reaction identified in some formations is the precipitation of Dawsonite as an aluminum carbonate mineral that can make up to 17% of the reservoir. − Moreover, geochemical interactions between the aqueous solution of CO 2 and rock-forming minerals are very possible to occur, involving both dissolution and precipitation. − Geochemistry probably influences the chemical and physical properties of the wells, the formation, and its surroundings because of the potential corrosive character of CO 2 . , Therefore, it may increase the environmental and financial risks of the CO 2 sequestration projects in deep geological formations.…”