In order to help realizing the national "double carbon target", it is necessary to explore oilfield recovery technology in-depth. Yanchang Oilfield has established two pilot test areas, an engineering demonstration site, and determined to start the planning of CCUS（carbon capture, utilization, and storage） project with an annual injection volume of 5 million tons, but there are some limitations and deficiencies in the existing CO2 injection and extraction process. The current situation and characteristics of CO2-driven injection and extraction technology in oilfields were systematically described, the problems in field application were thoroughly discussed. A series of improvements and refinements are proposed in injection and extraction wellheads, tubing columns, ancillary tools and anticorrosion measures, etc., to form an injection and extraction technology that meets the demand of prolonging the 360 000 ton annual injection volume of low-permeability reservoirs. The next direction of CO2 drive injection and extraction technology is proposed in order to provide reference and guidance for the development of the subsequent million-ton CCUS injection and extraction technology and supporting technology of Yanchang.