Application of multiphase generation process in a CO2 flood for high temperature reservoirs

摘要

A high temperature reservoir is preconditioned by injection of cold water until a zone around the injection well reaches a temperature suitable for multiphase generation conditions. A subsequent carbon dioxide injection creates a multiphase slug near the wellbore region. The multiphase slug is propagated through the reservoir by continued injection of CO2 or water alternating with gaseous CO2.