Abstract: The experiments and practice demonstrate that the non-linearity of fluids flow and variability of flow states are the main features of fluids flow in the reservoirs composed of complicated media.How to describe the non-linearity and variability is a focus being concerned widely in the field of current percolation flow dynamics, and it is still a pendent problem at present. According to the non-linearity of the flow curve and the differential theory,a generalized description method for fluids flow was proposed.The principle and operation steps of this method,as well as the aspects which should be noticed during the usage are all discussed.This method not only could represent the non-linearity of fluids flow,but also give conveniently the equations for describing the fluids flow at any flow velocity and pressure gradient.Thereby it could efficaciously characterize the variability of the fluids flow state.

Key words: complicated media, fluids flow, differential theory, generalized description method for fluids flow

摘要： 实验研究和现场实践表明,流体渗流的非线性和流态的多变性是复杂介质储层中的主要特征。根据实验渗流曲线的非线性特征,并结合微分原理,提出了一种广义的渗流描述法。文中详细地介绍了该方法的原理和一般步骤,以及使用过程中应当注意的问题。该方法不但可以描述流体渗流的非线性,而且还能方便地确定出流体在任一流速或者任一压力梯度下的渗流方程,从而可以有效地描述渗流过程中流体流态的多变性。

关键词: 复杂介质, 流体渗流, 微分原理, 广义渗流描述法