EOR study of CO_2 injection

Environment protection has drawn great attention in the 21st century.Global climate is getting warmer because of greenhouse gas emission,and something effective must be done.CO2 injection includes WAG injection and gravity-stable injection.This paper studies CO2 injection mechanism and the best way of application to realize optimum CO2 burial and improve oil production.CO2 EOR has been widely applied and will provide theoretical and practical basis to efficient and sustainable development of global oil resources.