CO2 Sequestrated EOR

1. If the miscibility pressure is reduced so that the reservoir crude oil and CO2 remain to be miscible, then, could we enhance reservoir recovery significantly?

2. Whether the minimum miscibility pressure (MMP) of crude oil–CO2 remains affected by reservoir temperature, pressure and oil composition?

In other words, in CO2 miscible flooding, whether, the multiple-contact miscibility between the injected gas and oil can be achieved at pressures above the minimum miscibility pressure (MMP) and below the first contact miscibility pressure?

3. Whether, reducing the reservoir temperature could reduce the miscibility pressure?

Whether adding coolant to the reservoir would reduce the local temperature of the reservoir towards reducing the miscibility pressure?

OR

Achieving a miscible phase by increasing the CO2 injection pressure would remain to be wiser?

Won’t it increase the costs?

AND

How about adding alcohols, which can improve the solubility of CO2 in crude oil and the volume expansion rate of crude oil?

Dr Suresh Kumar Govindarajan

Professor [HAG]

IIT–Madras 04-March-2025