Abstract: By screening and assessment, the C oil field located in Beibu Gulf is chosen as the place for EOR to inject the CO₂ discharged from the terminal of gas field in Hainan Island. According to the oilfield conditions, when the rate of injected CO₂ reaches 1 000 t/d, it is just accordant with the requirement of stable CO₂ injection for 20 years. Although paving 180 km pipeline is expensive, the benefit from EOR by CO₂ injection process will be greater, not only offsetting the cost invested at the early stage, but also gaining a lot of profit. If carbon tax and carbon trade are implemented in China, the CO₂ injection process for EOR will be more promising.

Key words: Beibu Gulf oilfield, Dongfang 1-1 gas field, CO₂ drive, EOR, carbon tax, carbon trade