CO2 Sequestrated EOR

1. Whether CO2 at its critical temperature and pressure would have a higher density?

If so, then, with increase in temperature, whether, the diffusion coefficient of CO2 would gradually increase – even though, the viscosity gets reduced with increase in temperature?

2. With increasing reservoir pressure, whether, the diffusion coefficient of CO2 would gradually decrease – even though - the viscosity of CO2 gets increased?

3. Compared to other gases, whether, CO2 has a relatively lower critical temperature and critical pressure, generating a more favourable miscibility with crude oil?

4. Even without miscibility, whether, CO2 could still exhibit an excellent oil displacement effect?

5. After dissolving in crude oil, whether, CO2 would cause the oil to expand?

And in turn, whether, CO2 would reduce oil-viscosity and thereby making the crude-oil easier to transport?

6. Under certain pressure conditions, whether, CO2 could extract both light and heavy components?

And in turn, would it cause the composition of the crude oil to approach equilibrium?

Dr Suresh Kumar Govindarajan

Professor [HAG]

IIT–Madras

04-March-2025