Authors: Binhua Niu Chunyan Sun Guoying Yan Wei Yang Chang Liu
Publish Date: 2009/12/29
Volume: 6, Issue: 4, Pages: 319-
Abstract
Up to now the primary method for studying critical porosity and porous media are experimental measurements and data analysis There are few references on how to numerically calculate porosity at the critical point pore fluidrelated parameters or frameworkrelated parameters So in this article we provide a method for calculating these elastic parameters and use this method to analyze gasbearing samples We first derive three linear equations for numerical calculations They are the equation of density ρ versus porosity ϕ density times the square of compressional wave velocity ρV p 2 versus porosity and density times the square of shear wave velocity ρV S 2 versus porosity Here porosity is viewed as an independent variable and the other parameters are dependent variables We elaborate on the calculation steps and provide some notes Then we use our method to analyze gasbearing sandstone samples In the calculations density and P and Svelocities are input data and we calculate eleven relative parameters for porous fluid framework and critical point In the end by comparing our results with experiment measurements we prove the viability of the method
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