弹性微球在岩石孔隙表面沉积和二次运移机理及实验研究  

Mechanism and Experimental Study of the Deposition and Secondary Migration of Elastic Microspheres on the Surface of Rock Pores

作　　者：李建晔 鞠野[1] 王晓龙 徐国瑞[1] 刘丰钢[1] 刘光普[1] LI Jian-ye;JU Ye;WANG Xiao-long;XU Guo-rui;LIU Feng-gang;LIU Guang-pu(China Oilfield Services Limited,Tianjin 30450,China)

机构地区：[1]中海油田服务股份有限公司,天津300400

出　　处：《辽宁化工》2020年第12期1472-1474,1478,共4页Liaoning Chemical Industry

摘　　要：为了深入地了解孔喉尺度下弹性微球在孔隙表面的沉积机理,在现有微尺度微球的实验和理论基础上,通过查阅有关微球微观尺度的受力分析有关文献,总结了微球在岩石孔隙沉积中的受力情况,从受力的角度上分析了微球在岩石孔隙表面的沉积机理。通过范德华力以及静电力公式定性地分析了矿化度和速度的变化对微球在岩石孔隙表面沉积现象的影响。结果表明:矿化度减少和流速的增加均会导致微球的释放,并且会引起微球的二次运移。In order to understand the deposition mechanism of elastic nanospheres on the pore surface at the pore throat scale,on the basis of the existing experiments and theories of micro-scale microspheres,by consulting the related literature on micro-scale stress analysis of microspheres,the stress situation of microspheres in rock pore sediments was summarized,and deposition mechanism of microspheres on rock pore surface was analyzed from the perspective of stress.The effect of mineralization and velocity changes on the deposition of nanospheres on the pore surface of rock was qualitatively analyzed by van der Waals force and electrostatic force formula.The results showed that the decrease of salinity and the increase of flow rate could lead to the release of microspheres to cause secondary migration of the microspheres.

关 键 词：微球 表面沉积 范德华力 静电力 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]