S2: Water Rock Interaction (Special Session)

[S2-02] Effect of microstructural evolution on permeability in polycrystalline aggregates

「発表賞エントリー」

*Wakana Fujita¹, Michihiko Nakamura¹, Gregor Golabek², Marcel Thielmann², Philipp Eichheimer², Kentaro Uesugi³ (1. Tohoku Uni. Sci, 2. Univ. Bayreuth, 3. JASRI)

Keywords:Grain growth, Quartz aggregate, Dihedral angle, Permeability

In order to investigate the effect of microstructural evolution on permeability in polycrystalline rocks, we synthesized quartz aggregates having variable fluid fraction and X_CO2 (CO₂/H₂O+CO₂). Grain scale fluid pools were formed by coalescence of pore fluids during grain growth. By using 3D pore structures obtained with synchrotron X-ray microtomography, numerical computation of permeability was conducted. Computed permeabilities were compared with laboratory measurements and theoretical models.