气驱已经成为提高低渗透油藏采收率的主要方法，在所有气驱中，二氧化碳和烃类气体混相驱的效果是最好的，但由于资源的限制。在中国东部油田难以大规模推广应用。-Gas drive has been improved in reservoirs with low permeability in all the main method, gas injection, carbon dioxide and hydrocarbon gas miscible flooding effect is the best, but due to resource constraints. In the eastern part of China Oilfield is difficult to be popularized and applied on a large scale.