CO2 Sequestrated EOR

1. Whether, the extraction effect of CO2 causes the extraction of light components in crude oil into the gas phase, further reducing the interfacial tension (IFT) between oil and gas?

2. Whether the injected CO2 critically displaces oil from the large pores and mixes with it, - and, eventually, forms an oil bank ahead of the miscible zone?

3. In the actual oil flooding process, whether, the reasons for the low efficiency of CO2 immiscible flooding remain to be the large CO2-brine density difference, low capillary force and low sweep efficiency?

4. Whether, the process of miscible flooding remains to be the diffusion and mass transfer of injected CO2 in reservoir porous media?

5. Whether, the two CO2-brine phases dissolve each other until the phase interface disappears?

Dr Suresh Kumar Govindarajan

Professor [HAG]

IIT–Madras

04-March-2025