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CO2 EOR已在石油行业应用了40多年。近几年,出于对温室效应的考虑,CO2注入油藏作为一种碳埋存方式引起广泛关注。结合EOR进行CO2储存的潜力巨大,且可达到永久封存的目的。目前,CO2 EOR已经不存在较大的技术问题,大部分项目利用低廉的天然CO2,经济回报较高。但将人类排放源(如发电厂)中的CO2捕集起来并用于EOR和储存,将会受到经济上的限制。本文阐述了CO2EOR原理、油藏储存潜力、油田筛选及经济分析,并对北海一个油田进行了实例分析。
CO2 EOR has been used in the oil industry for more than 40 years. In recent years, due to the consideration of the greenhouse effect, CO2 injection into the reservoir has drawn much attention as a carbon storage method. The potential for CO 2 storage combined with EOR is enormous and can be permanently stored. At present, CO2 EOR has no major technical problems. Most of the projects use low-cost natural CO2 and have high economic returns. However, capturing and using CO2 in human emissions sources (such as power plants) for EOR and storage will be economically constrained. This paper describes the CO2EOR principle, reservoir storage potential, oilfield screening and economic analysis, and an example of a Beihai oilfield.