Geochemical mechanisms of water/CO2-rock interactions in EGS and its impacts on reservoir properties: A review

•Reservoir properties and working fluid types for EGS are summarized based on related global projects.•The dissolution or precipitation process of common minerals and its influencing factors are described in details.•Salt precipitation in saline aquifers and its effect on reservoir permeability are illustrated.•The impacts of working fluid-rock interactions on reservoir permeability, mechanical properties and heat extraction capacity are summarized.•The prospects of CO2-EGS and some limitations of current studies have been discussed.