中国油气田注CO_2提高采收率实践  

Practices of CO_2 EOR in China

作　　者：罗二辉 胡永乐 李保柱 朱卫平[2] 

机构地区：[1]中油勘探开发研究院,北京100083 [2]中油吐哈油田分公司,新疆哈密839009

出　　处：《特种油气藏》2013年第2期1-7,42,共8页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项"CO_2驱油与埋存关键技术"(2011ZX05016-006)

摘　　要：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 CO2 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 CO2 flooding are investigated,and comparative analysis is performed for initial reservoir pressure and minimum miscibility pressure.Field cases of CO2 flooding are generalized based on the types of reservoirs such as low permeability,high water cut,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 COflooding is proposed in conjunction with field experience and existing problems.

关 键 词：注CO2 最小混相压力 混相驱 提高采收率 换油率 

分 类 号：TE357.7[石油与天然气工程—油气田开发工程]