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简单来说,二氧化碳驱油技术就是把二氧化碳注入油层中以提高采油率。国际能源机构评估认为,全世界适合二氧化碳驱油开发的资源约为3000×108～6000×108bbl。由于二氧化碳是一种在油和水中溶解度都很高的气体,当它大量溶解于原油中时,可使原油体积膨胀、黏度下降,还可降低油水间的界面张力。与其他驱油技术相比,二氧化碳驱油具有适用范围大、驱油成本低、采油率提高显著等优点。二氧化碳驱油技术是石油公司发展碳封存的重要技术路径,是实现二氧化碳资源利用和封存的最佳结合点之一。大
Simply put, carbon dioxide flooding technology is the injection of carbon dioxide into the reservoir to increase oil recovery. According to the assessment of the International Energy Agency, the resources for the development of carbon dioxide displacement in the world are about 3000 × 108 ~ 6000 × 108bbl. Since carbon dioxide is a highly soluble gas in both oil and water, it can cause the volume of crude oil to expand, decrease its viscosity and reduce the interfacial tension between oil and water when it is dissolved in a large amount in crude oil. Compared with other flooding technologies, carbon dioxide flooding has the advantages of large applicable range, low flooding cost and remarkable oil recovery rate. Carbon dioxide flooding technology is an important technological path for oil companies to develop carbon sequestration and is one of the best integration points for realizing the utilization and sequestration of carbon dioxide resources. Big