CO2 Miscible Flooding

Whether, CO2 Miscible Flooding ‘remains ruled out’ in a sandstone or a limestone reservoir, if

(A)Formation is not deep enough to have fracturing pressures greater than MMP;

(B) Reservoir depth remains shallower than 3000 ft;

(C) Viscosity of crude oil exceeding 10 cP;

(D) API Gravity of crude oil remaining less than 30 degrees;

(E) Oil saturation not exceeding 20%

How exactly to enhance the oil recovery?

(A)From lower portions of the formation, where, low density of high-pressure scCO2 (relative to oil) keeps promoting gravity override of CO2?; &

(B)From Adverse Mobility Ratio associated with low viscosity scCO2 (relative to oil & brine viscosity)?

Dr Suresh Kumar Govindarajan

Professor [HAG] IIT-Madras 24-Feb-2025