Numerical modeling of rock dielectric behaviors using micro computerized tomography image

A numerical evaluation of the permittivity of sandstones through the micro Computerized Tomography (micro CT) images is conducted using an image porosity extracting algorithm and an improved Finite Difference Method (FDM). Within the acquired physical properties by 3D micro CT scanning, numerical method is used to model and compute the permittivity of the rock samples. The simulated results of 2 clastic sandstone samples with dry state and saturated state are compared with experimental data for validating the accuracy of the proposed numerical method. The results show great agreement and the error of permittivity evaluation is less than 3%.