弱碱三元复合体系提高采收率效果评价  

Effect Assessment of Improving Oil Recovery by Weak Base Alkali-Surfactant-Polymer Flooding

作　　者：徐思宁[1] 张继红[1] 杨丰源[1] 

机构地区：[1]东北石油大学,黑龙江大庆163318

出　　处：《当代化工》2016年第8期1750-1752,共3页Contemporary Chemical Industry

摘　　要：大庆油田目前已经进入高含水阶段,但油藏中仍残留大量原油,因此针对大庆油田目前的开采状况,为提高大庆油田非主力油层实施弱碱三元复合体系驱油效果,进行室内模拟驱油实验,得到不同注入时段和不同表面活性剂浓度、聚合物浓度的驱油效果。通过实验可得：水驱转注为弱碱三元复合体系的时间越提前,采收率越高;主段塞内注入聚合物和表面活性剂的体积越大,采收率越大;在水驱基础上,采用Mr（相对分子质量）为800×10^4抗盐聚合物和Mr（相对分子质量）为1 500×10^4聚合物的三元复合体系在水驱基础上化学驱采出程度均大于22%。Daqing oilfield has entered high water cut stage at present, but huge quantities of crude oil still remains in reservoirs.In this paper, based on the present production condition of Daqing oil field, in order to improve displacement effect of ASP system in non main oil reservoirs of Daqing oilfield, indoor core displacement experiments were carried out, the influence of injection time, surfactant concentration, polymer concentration and injection pattern on oil displacement effect was investigated. The results show that,the earlier the time of water flooding switching weak base ternary compound flooding, the higher the recovery efficiency is; the higher the concentration of surfactant and polymer concentration in main slug, the higher the recovery rate; the greater the volume of injected polymer and surfactant, the higher the recovery degree; Using relative molecular mass 800×10^4 salt resistant polymer and polymer relative molecular mass 1 500×10^4 ternary compound system on the basis of water flooding, the recovery degree of chemical flooding can be more than 22%.

关 键 词：弱碱 三元复合体系 表活剂浓度 聚合物浓度 

分 类 号：TE357[石油与天然气工程—油气田开发工程]