REVIEW OF CO2 MULTIPHASE FLOW IN TWO-DIMENSION POROUS MICROMODELS
In order to mitigate the green house effect, CCS(carbon capture and sequestration) as the most efficient way has been investigated by many scientists recently. Many findings about this process have been reported, however, there is a lack of fundamental understanding about the flow mechanisms in porous media. During the past decades, micromodels have been increasingly used to study the behavior of fluids inside microstructures in various research areas. In this study, we reviewed the experiments and simulations about CO2 multiphase flow in porous micromodels. The experiments were focused on the effect of injected velocity, structure of pore network and experimental conditions by using microscope and camera recording the flow of CO2 and another fluid temporally. Based on the captured pictures, the distribution of phases in micromodels can be visualized and quantized to study the process of two-phase displacement, characteristics of interfacial area, and dynamic changes of some physical properties such as velocity field, saturation, relative permeability, and solubility. Numerical simulation can verify the experimental results well, and it won't be restricted like experiment by some technology. There are four main approaches used to solve multiphase flow problems at the pore scale: pore-network models, Lattice-Boltzmann simulations, Lagrangian mesh-free methods and grid-based computational fluid dynamics. The combination of experiment and numerical simulation on the pore scale will provide sufficient evidence for the achievement of CCS.