In view of the highly developed industry and agriculture in China coastal cities, the pressure of the greenhouse gas emissions greatly increases, meanwhile, more and more oil and gas reserves with high CO₂ content are found in China offshore oilfields, whose development is facing great challenges. A feasibility study of the offshore CO₂ flooding application in China offshore oilfields "A" is carried out. Firstly, the worldwide researches and applications of offshore CO₂ flooding are reviewed, including the key technology breakthroughs, the field performance and the valuable experience. Secondly, the design and the optimization of CO₂ flooding in China offshore field"W" are made based on the reservoir engineering and the numerical simulation and its potential enhanced recovery and sequestration are evaluated. Finally, the outlook of China offshore CO₂ flooding is evaluated. It is shown that this technology could improve the recovery of offshore oil reservoirs and improve the utilization rate of natural gas resources, which also provides a new way for the reduction of the greenhouse gas emission.

offshore oilfields  /  CO₂ flooding  /  EOR  /  sequestration  /  anti-corrosion