二元驱油水界面Marangoni对流启动残余油机理  

The Mobilization Mechanism of Residual Oil by Marangoni Convection Caused by Binary Flooding

作　　者：罗莉涛 刘先贵[3] 廖广志 刘卫东[3] 崔彬[5] 

机构地区：[1]中国科学院渗流流体力学研究所,河北廊坊065007 [2]中国科学院大学,北京石景山100190 [3]中国石油勘探开发研究院廊坊分院,河北廊坊065007 [4]中国石油勘探与生产分公司,北京东城100011 [5]中国石化华东分公司,江苏南京210019

出　　处：《西南石油大学学报（自然科学版）》2015年第4期152-160,共9页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家科技重大专项(2011ZX05031);国家高技术研究发展计划(2013AA064402)

摘　　要：二元驱的Marangoni对流在启动油藏残余油方面有重要作用,研究其微观机理对更好地应用二元驱技术提高采收率具有重大意义。设计了验证Na_2CO_3溶液、KPA表活剂溶液及二者的二元驱溶液与原油接触后产生Marangoni对流效果的实验和利用能产生强Marangoni对流的二元驱进行微观仿真模型驱油的实验,分析了二元驱中油水界面Marangoni对流启动残余油微观机理。结果表明:Na_2CO_3溶液、KPA表活剂溶液及二元混合溶液与原油接触后都能产生Marangoni对流效果,且浓度越大,Marangoni对流效果越好;Na_2CO_3和KPA对于产生Marangoni对流有协同作用;1.2%Na_2CO_3和0.3%KPA二元驱产生的强Marangoni对流引起了界面扰动和自发乳化作用,对启动膜状、岛状和盲端等残余油均有显著效果。建议油田采用能够产生强Marangoni对流的二元驱。Marangoni convection of the binary flooding plays an important role in mobilizing residual oil in reservoir. Researches on the microscopic mechanism will contribute to the application of binary flooding to enhanced oil recovery. In this paper, the authors used Na2CO3 solution, KPS surface active agent solution and mixed solution to contact with crude oil respectively. The experiments verified their marangoni convection effect. Microscopic simulation model ofoil displacement experiment was made with NazCO3 and KPS binary flooding that result in strong Marangoni convection. The results show NazCO3 solution, KPS surface active agent solution and mixed solution could all have marangoni convection effect. The greater the concentration is, the better the effect of marangoni convection is. Na2CO3 and KPS have synergy for marangoni convection.The binary flooding mixed with 1.2% Na2CO3 and 0.3% KPS can cause the interfacial turbulence and spontaneous emulsification. It has a significant effect on mobilizing residual oil in membrane, island and blind side. The binary flooding which can produce strong marangoni convection should be used in the oil field.

关 键 词：二元驱 Marangoni对流 残余油 界面扰动 自发乳化 

分 类 号：TE357[石油与天然气工程—油气田开发工程]