流线数值模拟中的流线追踪技术

Streamline Tracing Technique of Streamline Simulation

流线模拟已经越来越多的应用于油气田开发的各个领域,相对于传统的有限差分方法,前者因运算速度快及直观地显示驱替前缘等优势受到广泛重视。为摸清利用流体质点如何追踪流线,将饱和度三维模型转化为沿流线的一维模型,推导了油水两相渗流模型,采用IMPES方法给出了流线数值模拟的求解思路;利用目前最为流行的Pollock方法,阐明了流线追踪的具体过程。通过算例,研究了五点法、反七点法、反九点法及不规则井网的流线分布,方便借鉴与应用。

The streamline simulation has been applied increasingly to many areas of oil & gas oilfield development.Compared to traditional finite-difference methods,its advantages of fast speed and better show displacement front is gain more attention.In order to understand how to trace streamlines by particles and three dimension model of saturation transformed to one dimension model along streamlines,two phases flow model of oil and water was derived.The solution procedure of streamline simulation was acquired by IMPES method,the detail steps of streamline tracing was illustrated by current Pollock method.Examples show that the streamline fields of five spot patterns,inverted seven spot patterns,inverted nine spot patterns and irregular well pattern are studied,which is convenient for reference and application.