【摘要】 流行的流动单元识别指数FZI不适于识别非均质性强,孔喉结构复杂的致密砂岩储层流动单元。以大牛地致密气藏储层为例,采用基于岩石孔隙结构和渗流特征的流动单元识别指数FZIm识别效果较好。当胶结指数m不是常量1,而是一个变量时,它对孔隙结构与渗流特征的影响较大。当m为1时,FZIm与FZI相同,即FZI仅是FZIm的特例。研究认为FZIm既适用于常规均质砂岩,也适于致密砂岩储层流动单元的识别。对未测m的流动单元,用本文介绍的预测方法预测m后,即可据FZIm对流动单元进行识别。更多还原

【Abstract】 Popular flow zone index FZI is not suitable for strong heterogeneity and complex pore throat structure reservoir flow units identification of tight sandstone reservoir.Taking Daniudi tight gas reservoir as an example,introducing the cementation exponent m which reflects the rock pore structure into improved Kozeny-Carman equation to calculate FZIm,the recognition results were satisfying.When mis not constant of 1,but a variable,it has bigger influence on the pore structure and seepage characteristics.If m=1,FZImequates FZI,FZIis only special case of FZIm.Research suggests that FZImis not only suitable for conventional homogeneous sandstone,but also for the recognition of tight sandstone reservoir flow unit.For sand sample without cementation exponent,using the method that introduced in this paper to predict m,we could get FZImfor flow unit identification.更多还原