摘要
研究显示聚合物注入地层后,经受各种因素的长期作用,产出后其结构和性能较注入前都有很大变化。本试验以渤海锦州9-3油田注聚受益井W7-4产出含聚污水为例,在综合分析储层地质特征、利用环境扫描电镜观察产出聚合物的分子形貌等基础上,定量评价了不同产出聚合物浓度、不同剩余油饱和度对驱油效率的影响程度,为含聚污水的再利用提供实验依据。扫描电镜分析照片显示产出聚合物呈网络状结构;评价实验结果表明普通污水驱替不出油后,转注含聚污水能提高驱油效率1.5%～5%,提高幅度随残余聚合物浓度的增大而增大;剩余油饱和度越高,含聚污水提高驱油效率越高。
Research results show that polymers are subjected to the long-term impacts of various factors after they were injected into the underground,and their structures and properties have changed greatly.In this paper,the producted sewage was exemplified from the production well W7-4 in Bohai Jinzhou 9-3 oil field after polymer flooding.Subsequently,the influences of the produced polymer concentration and remaining oil saturation on oil displacement efficiency were quantitatively evaluated based on the comprehensive analysis of the reservoir geologic characteristics and the observation of polymer molecular morphology with an environmental scanning electron microscope(ESEM),thereby provided guidance for the reutilization of polymer-contained sewage.ESEM photos show that the residual polymer assumes the reticular structure.In addition,evaluation experimental results revealed that polymer-contained sewage flooding can increase the oil displacement efficiency by 1.5%-5% than the common sewage flooding and the efficiency increases with the residual polymer concentration.the higher the remaining oil saturation,the larger the oil displacement efficiency.
出处
《石油与天然气化工》
CAS
CSCD
2011年第6期598-601,606,共5页
Chemical engineering of oil & gas
基金
国家油气重大专项"海上油田注入水综合治理技术研究"(2008ZX05024-002-11)和"多枝导流适度出砂开采过程中储层保护技术研究"(2008ZX05024-003-04)
关键词
含聚污水
残余聚合物
分子形貌
剩余油饱和度
驱油效率
polymer-contained sewage
residual polymer
molecular morphology
remaining oil saturation
oil displacement efficiency
