EGU General Assembly 2007
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  Information - GMPV11 CO2 Geological Sequestration: bio-mechano-geochemical processes from the pore-scale to the reservoir-scale

Event Information
In the past five years, increasing fundamental researches have focused on the short and long term effects of the massive injection of anthropogenic carbon dioxide in various geological environments. A growing scientific community is now studying the coupling between biological, geochemical, mechanical and hydrodynamical processes arising as a result of the strong thermodynamical disequilibrium caused by the injection of large amount of CO2 and the consecutive modification of the pH of the formation waters. New concepts are now emerging to study the consequences and kinetics of these effects, using well-controlled laboratory experiments and observations of field natural examples aimed to validate and/or improve computer codes for mineral trapping of CO2. In particular, studies are now focusing on the equilibrium and kinetics of carbonate formation, which determine the extent and rate of formation of stable carbonate minerals, as well as the effect of organic or inorganic impurities in the precipitated minerals. In addition, the modification of the deep biosphere metabolism induced by the injected CO2 and the complex kinetics associated with biologically-induced precipitation of carbonates are now thought to represent key aspects of the mineralization processes. Finally, dissolution and precipitation can modify the hydrodynamical and mechanical properties of the reservoir, inducing permanent deformations and eventually failure, strong modifications of the storage volume and of the transport properties.

The aim of this session is to present the most recent advances on the bio-mechano-geochemical coupled processes related to the short and long term effects of carbon dioxide sequestration from the pore to the reservoir. Papers are invited on 1) laboratory and/or field experiments involving the injection of CO2-rich fluid and their effects on biological, geochemical and mechanical processes, 2) case studies of relevant natural analogue CO2 reservoirs, 3) modeling of fluid-rock interactions processes in this context (analytical and numerical solutions from molecular to reservoir scale,).

Preliminary List of Solicited Speakers


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