Low porosity and high heterogeneity in carbonate reservoir make the conventional logging method invalid which USES the resistivity to identify fluid property.
碳酸盐岩储层由于其孔隙度低、非均质性强等原因，使得以电阻率高低来识别储层流体性质的常规方法失效。
In this paper, we offer the theories of hide periods and covariance matrix and use them to identify the fluid property of reservoir.
本文还介绍了隐周期和协方差阵理论以及用它们来分析测井信号。
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