Browsing by Author "Komarova, Irina"

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    Carbon-dioxide storage in the subsurface : a fully coupled analysis of transport phenomena and solid deformation
    (2012) Komarova, Irina; Ehlers Wolfgang (Prof. Dr.-Ing.)
    Within the scope of carbon-dioxide capture and storage (CCS) problem, the geological storage of CO2 is assumed to be a promising technology for the reduction of atmospheric CO2 emission from human activity. There are different types of geological formations suitable for CO2 disposal. Among many others, deep saline aquifers are taken into consideration in the present contribution. The advantages of this reservoir compared to others are its relatively high capability and world-wide availability. The CO2 distribution over the aquifer depends on many different factors, such as the interaction between the injected CO2 and solid particles in the aquifer, the heterogeneity at different scales, gravity and many others. Researchers and engineers often consider the distribution of CO2 in the reservoir neglecting the thermal, chemical and mechanical coupling of the processes. However, these effects can play a significant role in the CO2 sequestration and are quite complex to describe. In this context, the distinguishing feature of this investigation is that besides studying the processes in the framework of fluid dynamics and multiphase flow, the mechanical effects are also taken into consideration. In particular, the deformation of the solid within the aquifer and the cap-rock layer as well as the phase transformation of the supercritical CO2 are studied here. In order to describe these processes, a multiphasic model in the continuum mechanical framework of the well-founded Theory of Porous Media (TPM) is applied.