在调研大量相关文献的基础上,详细综述了中国油气田50多年的注CO2提高采收率实践.首先依据中国各大油区公开发表的文献实验数据,从室内机理实验统计CO2驱油关键技术参数,对比分析原始地层压力与最小混相压力.其次,根据不同储层类型,总结了国内在低渗透油藏、高含水油田、复杂断块、稠油油藏、碳酸盐岩油藏及煤层气等储集层开展的注CO2矿场项目.现场试验结果显示,提高采收率幅度为1.07％～6.00％,换油率为0.98 ～2.49 t/t.最后结合矿场已有经验及存在问题,提出CO2驱油技术攻关方向.%Practices of CO, EOR over the past 50 years in China have been investigated extensively. Based on data of laboratory experiments from various oilfields, the key technical parameters of CO, flooding are investigated, and comparative analysis is performed for initial reservoir pressure and minimum miscibility pressure. Field cases of CO, flooding are generalized based on the types of reservoirs such as low permeability, high water cul, complex fault block, heavy oil, carbonate and coal bed methane. The result indicates that the recovery factor is increased by 1. 07% ~6. 00% , and the utilization factor is 0. 98 ~2. 49 t/t. Finally, the direction of research on CO, flooding is proposed in conjunction with field experience and existing problems.
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