描述特低渗透油层两相渗流特征的改进方法A Modified Method for Describing Oil and Water Phase Seepage Flow in Ultra-low Permeable Reservoir
兰玉波,肖鲁川,赵玉珍
LAN Yu bo 1; XIAO Lu chuan 2;ZHAO Yu zhen 3(1.Daqing Petroleum Institut;
摘要(Abstract)：
在室内实验研究的基础上 ,从单项非线性渗流方程出发 ,按一维两相渗流理论 ,导出了描述特低渗透油层油水两相渗流特征的公式 ,用该公式建立了低渗透岩样非稳态油水相对渗透率曲线计算方法。该方法突破传统只在标配系数LμV >1的情况下计算特低渗透岩样油水相对渗透率曲线问题 ,不仅考虑了毛管压力的影响 ,还考虑了油水非达西渗流的影响 ,反映了特低渗透储层岩心的两相非线性渗流特点。利用该公式可以为正确描述特低渗透油田油水两相渗流规律提供可靠的实验资料
Based on laboratory experiment, and starting from single item non linear seepage flow equation, a set of equation for describing oil and water phase seepage flow in ultra low permeable reservoir is set up according to 1D two phase seepage flow theory, from which a method for calculating non stable oil and water relative permeability curve of low permeable sample is deducted. The traditional calculation method is only done when LμV>1, and this new method is a breakthrough of the traditional method, in which not only the capillary pressure, but also the oil water non darcy seepage flow is considered, reflecting correctly the characteristic of two phase non linear seepage flow in ultra low permeable core, providing reliable experimental data for describing oil and water two phase seepage flow regularity in ultra low permeable oil fields.
关键词(KeyWords)：
特低渗透油层;渗流方程;非线性流动
low permeability; seepage flow; oil and water phases
基金项目(Foundation):
作者(Authors):
兰玉波,肖鲁川,赵玉珍
LAN Yu bo 1; XIAO Lu chuan 2;ZHAO Yu zhen 3(1.Daqing Petroleum Institut;