Bidirectional Linear Regression Method for Calculating Critical Point, Framework and Pore Fluid Parameters of Water-saturated Dolomite

Abstract

Abstract:

The critical porosity and relative elastic parameters of the porous media are usually studied by methods of experimental measurements and data analysis, however it is difficult and complicated to calculate elastic parameters by these methods. So in this paper, a numerical calculation approach and some equations of bidirectional linear regression are provided for calculating these elastic parameters. The derived bidirectional linear equations in this paper show that ρ,ρV2S sand ρV2P are functions of, at the same time is a function of ρ,ρV2S and ρV2P. Based on these equations, in accordance with density, compressional and shear velocities of entirety, twelve partial elastic parameters of framework, pore fluid and critical point can be obtained. Correlation coefficients of simulated data and measured data are over 90%, which proves the feasibility of the equations and the availability of this method. In the field of oil and gas exploration, the method can be directly used to calculate elastic parameters of pore fluid, and plays a crucial role in predicating oil and gas reservoirs.

Key words: critical point, pore fluid, framework, elastic parameter, numerical calculation

CLC Number:

P631.4
TE311

LIU Si-Si, NIU Bin-Hua, SUN Chun-Yan, YANG Kui. Bidirectional Linear Regression Method for Calculating Critical Point, Framework and Pore Fluid Parameters of Water-saturated Dolomite[J]. Geoscience, 2011, 25(1): 129-136.

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