Study on the Effect of Gravity on Gas-Water Two-Phase Flow Characteristics in CO2 Geological Storage
CO2 geological storage technology is an effective method to reduce greenhouse gas emis-sions,subcore-scale CO2-water flow experiments within porous media are important to elucidate the residual capture process in CO2 geological storage for prediction of storage potential.In this paper,experiments on CO2 flooding were conducted using a high-pressure microfluidic chip at a capillary number of 2.37x10-5 to investigate the effect of gravity on the flow of gas and water phases.The distribution pattern and flow characteristics of the two phases in the non-homogeneous pores were collected in real time,further quantifying the CO2 saturation and assessing the CO2 storage capacity,and elucidating the effect of gravity on the CO2 residual capture process.
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