**6. Conclusion**

With the decline of oil production and apparition of global warming problem caused by excessive emission of carbon dioxide during the last decades, it is believed that EOR/EGR-CO2 technologies will play a key role to meet the energy demand and better mitigation of climate change in the years to come. If we investigate at the great number of studies cited in this study, the subject of EOR-CO2 is being very important. Several physical and chemical mechanisms are associated with CO2 injection, and the most important mechanism is the dissolution of carbon dioxide into fluid formation. It has been accepted from previous studies that the dissolution of CO2 increases fluid density, which results in a downward density-driven convection and consequently greatly enhances oil recovery and CO2 potential sequestration.
