Microfluidic study for investigating migration and residual phenomena of supercritical CO2 in porous media

This study aims to observe the displacement pattern and to estimate storage efficiency by using micromodels. A series of scCO2 injection experiments is conducted for visualization of distribution of injecting scCO2 and residual porewater in transparent micromodels under reservoir conditions. To analyze the porewater displacement by scCO2 injection quantitatively, the images of invasion patterns and distribution of CO2 in pore networks are acquired through an microscopic imaging system. The results are applied in investigating the effects of major environmental factors such as CO2 phase and pressure on porewater displacement by scCO2 and storage efficiency in terms of areal displacement efficiency.