在后续注水过程中，存在于大孔道的弱凝胶迫使后续注入水改向进入未被注入水波及的小孔隙，驱替的残余油滴聚集并形成油墙。
In the post-water flooding process, WG in the larger channels diverts the injected water entering the smaller pores and displacing residual oil to form oil bank in the front of the displacing water.
在注水开发或强化采油过程中从储层中驱替出的油量与在此过程之前该储层中存在的油量之比。
A ratio of the volume of oil from a zone by a waterflood or enhanced oil recovery process to the volume of oil present in the zone prior to the process.
通过长岩心驱替实验和数值模拟研究，对葡北油田在注水、水气交替、气水交替、注气驱替方式下的开发效果进行了对比研究。
By long core displacement experiment and numerical simulation, has made comparative analysis of development effect for injection water, WAG, GAW, and injection gas in PuBei oil field.
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