The Study on Supercritical Multi-Phase Fluid in Carbon Dioxide Sequestration

Based on semi-analytical method, this paper studyies the supercritical CO₂ flowing in aquifer in term of the multi-component and multi-phase property. This paper also analyzes the fluid property, Darcy's law, the mass conservation and the ideal fluids and the elastic materials hypothesis, adjusts multi-phase fluid model mechanism and derived the petrophysical state equation. The result provides a theory evidence for the supercritical CO₂ multi-phase fluid. It is very useful to the research of hydrogeology, geochemistry and physical geography.