Research Progress Of CO_2 Flooding To Enhance The Recovery Ratio Technology

With some oil-field development entered the later period,the water-injection development as well as three extraction technology already could not raise the recovery ratio any more,by now CO2 flooding technology to raise the crude oil recovery ratio,which obtained the widespread application in the scene. At present,this technology has already applied in US,Canada maturely.Our country is relatively late to this technology,also needs to be deeply researched to this craft.In China,with the discovery of CO2 source,this technology has been applied more and more in oil field.On investigating and studying massive literature materials in both the domestic and foreign,This article had expounded the mechanism of CO2 raising the crude oil recovery ratio,the irrigation way as well as the research present situation and the progress of CO2 driving to raise the recovery ratio.And summarized the screening standard goal reservoir which suited CO2 to drive.