CO2 Sequestrated EOR

1. If CO2 vaporizes the light components in crude oil, then, whether, the surface tension at the oil–brine interface would get reduced?

In turn, whether, the remaining oil saturation would also get reduced?

In turn, would it improve the oil recovery?

2. If injected CO2 occupies a fraction of pore space in the oil reservoir, then, would it increase the ‘pressure’ of the oil reservoir?

In turn, would it enhance the crude-oil production?

3. During the production process, whether, the pressure drop would cause the CO2 dissolved in the crude oil to escape?

Such CO2 escape – would have the effect of ‘dissolved gas flooding’?

In turn, would it improve the oil displacement effect?

4. Whether, CO2 remains dissolved in crude oil to expand the volume while reducing the viscosity and increasing the oil–brine mobility ratio?

5. Does ‘Solubility of CO2 in Oil’ ‘increase with pressure’?

Then, why does ‘Rate of Increase’ in ‘Solubility of CO2 in Oil’ get reduced @ Pressures, greater than Extraction Pressure?

Dr Suresh Kumar Govindarajan Professor [HAG]

IIT–Madras 04-March-2025