气水交替注入提高采收率机理研究进展

气水交替注入综合了气驱和水驱各自特点,可以很好的控制流度及稳定驱替前缘从而大大提高宏观驱油效率,已广泛应用于油田生产实践.总结了国内外有关气水交替注入的历史,研究了气水交替注入的技术分类,区分了根据混相状态的分类、注入气体的分类及其它分类等.另外,文章还进行了气水交替提高采收率研究小结,提出了气水交替注入技术的今后研究方向,对三次采油及油田实行早期气水交替注入具有一定意义.

Development of the Research on EOR Mechanism by WAG

WAG integrates the respective characteristic of gas drive and water drive, it can effectively control mobility ratio and stabilize displacement front to raise macroscopic sweep efficiency, and has been put in extensive use in oil field production practice. This paper summarizes the history of WAG both home and abroad, studies the technical classification of WAG and distinguishes the different methods of partition by WAG which include mixed phase state, injected gas and some other way. Moreover, the research of IOR mechanisms by WAG is summerized, the direction in research for the future is put forward, good sense in tertiary recovery and early stage WAG in oil field is made.