By combining CO₂ emission reduction in the coal chemical industry with CO₂ resources utilization，Yanchang Oilfield created a linkage development model of the low-carbon development of the coal chemical industry and the green and efficient development in low-permeability tight reservoirs in the northern Shaanxi Province. This study systematically presented the whole-process integration technology of carbon capture，utilization，and storage（CCUS）and field tests. For CO₂ capture，the low-temperature methanol washing technology in the coal chemical industry was formed，which had low costs.For CO₂ flooding，a new theory of“corrosion increasing permeability，wetting promoting permeability”was proposed for CO₂ immiscible flooding in low-permeability tight reservoirs. In addition，the efficient CO₂ flooding technology was developed to improve CO₂ miscibility and recovery the reservoirs by CO₂ flooding in a three-dimensional and balanced manner. For CO₂ storage，the sealing mechanism of overlying layers was clarified，and the evaluation methods for the capping capacity of cap layers and CO₂ storage potential and the CO₂ safety monitoring system of reservoirs were improved. Field practice shows that the application prospects of CO₂ flooding and storage technologies are broad in low-permeability tight reservoirs.