A HYBRID RECONSTRUCTION METHOD OF SANDSTONE FROM 2D SECTION IMAGE

We present a hybrid algorithm to reconstruct 3D microstructure from 2D section image of sandstone. Utilizing porosity and autocorrelation function of 2D image, truncated Gaussian method based on fast Fourier transformation is used to reconstruct an initial structure rapidly with less accuracy. The initial structure is evolved by simulated annealing method to reconstruct a microstructure with the same statistic characteristics of 2D section image. Permeability of reconstructed microstructure estimated by Kozeny-Carman formula is close to that of tomographic images of sandstone. Experiments and comparisons show that the hybrid reconstruction method is more efficient and effective than simulated annealing algorithm alone.