Abstract: Aimed at such problems in heavy oil production near shore as low primary and secondary recovery efficiency, high viscosity difference, easy water breakthrough, many producing pays, serious reservoir heterogeneity, high producing pressure difference, severe fine particle migration in the reservoir, severe nearbore plugging caused by organic settlement of colloid and asphalt, the new method of microorganismCO2 compound flooding is suggested. The article separately summarizes the heavy oil development ways and application state of microorganism injection and CO2 flooding, analyzes the feasibility that microorganismCO2 compound flooding develops heavy oil fields and then puts forward the problems that need being solved when using the new method. The method is of very important value and popularization in the development and enhanced oil recovery of heavy oil.

Key words: heavy oil, enhanced oil recovery, CO², microorganism, compound flooding