低渗透岩心快速饱和油实验方法研究  

The experiment research of low permeability cores fast saturated oil

作　　者：周强[1] 唐海[1] 吕栋梁[1] 郭丰[1] 

机构地区：[1]西南石油大学石油与天然气工程学院,四川成都610500

出　　处：《石油化工应用》2015年第3期95-97,102,共4页Petrochemical Industry Application

基　　金：中海油天津分公司项目"渤中25-1及渤中34-2/4低渗油藏渗流机理及驱油效率研究";项目编号:KF13TSB092

摘　　要：该文自行设计了一套实验装置,用于低渗透岩心快速饱和油实验。实验方法是用CO2气体驱尽岩心中的空气,再用模拟油驱替CO2,利用CO2易溶于油,容易形成混相驱替的原理,油会占据孔隙空间,从而实现低渗透岩心快速饱和油。另外,同时还进行了抽空饱和岩心实验和直接用模拟油驱实验,将实验结果进行对比分析,以气测岩心孔隙体积为基准来对比分析岩心饱和油的程度。实验结果发现:抽空饱和程度最高,但需要时间较长;直接用模拟油驱的饱和程度最差;"CO2+模拟油"混相驱饱和油需要的时间短,且饱和程度相对较高。This paper had designed a set of experimental apparatus for the experiment of low permeability cores quickly saturated oil. Experimental method was to use CO2 to displace the air in the core, and to use simulation oil to displace CO2 in the core, using the principle of CO2 easily dissolving in oil, it was easy to form a miscible displacement and oil would occupy the pore space, so it could realize that low permeability cores were saturated oil quickly.In addition, at the same time we also had done core experiment saturated oil by exhausting air and done core displacement experiment directly with the simulated oil, the experimental results were analyzed compared with above, and we had analyzed the extent of core saturated oil based on gas surveying core pore volume. The results found that core experiment saturated oil by exhausting air had the highest degree of saturation, but needed a long time, the degree of saturation of simulation oil flooding was the worst, ＂CO2＋simulated oil miscible flooding＂ need shorter time, and the degree of saturation was relatively high.

关 键 词：低渗透岩心 CO2驱 混相驱 饱和油 

分 类 号：TE357.45[石油与天然气工程—油气田开发工程]