Numerical Calculation Method for Critical Point, Pore Fluid and Framework Parameters of Gas‐Bearing Media

The mostly used methods for studying critical porosity and porous media are experimental measurement and analysis of testing data, and how to determine the porosity at the critical point and the constituents' properties are topics of great concern. In this article, we propose a method for calculation of these elastic parameters. Firstly, we derive three linear equations for numerical calculation. By combining regression coefficients of the equations, we propose equations for calculating constituents' parameters. Then we present the steps for calculation and give some notes. We use this method to analyze gas-bearing sandstone samples. Using the entire densities, P-velocities and S-velocities as input data, we calculate related properties about porous fluid, framework and critical point. In the end, by comparing our results with test data of experimental measurements, we test our method and prove that this method is correct and effective.