Three-dimensional particle structure reconstruction method based on rock-core two-dimensional particle image

Abstract

The invention relates to a three-dimensional particle structure reconstruction method based on a rock-core two-dimensional particle image. Aiming at a three-dimensional modeling problem based on the rock-core two-dimensional image, the mineral particle information contained in the two-dimensional image is utilized to deduce three-dimensional particle structure information corresponding to a two-dimensional particle structure. Particularly, a rock-core particle microstructure reconstruction algorithm is proposed based on the combination of a simulated annealing algorithm and a particle growth algorithm, so that the reference images of the reconstructed three-dimensional particle structure and the two-dimensional particle structure have similar morphologic distribution, and the rock-core particle structure characteristics can be captured better; the three-dimensional distribution of mineral particles in the microstructure represents the spatial distribution of the mineral particles, and the influence of different mineral constituents on the structural performance of the three-dimensional particle structure is quantized based on the three-dimensional particle structure; the reconstructed three-dimensional microstructure provides a better explanation for the real rock-core microstructure; and the three-dimensional particle structure reconstruction method can be applicable for research on the electrical characteristics and seepage characteristics of the rock-core microstructure, and has practical values.

Description

technical field [0001] The invention relates to a three-dimensional modeling method based on a two-dimensional image, in particular to a three-dimensional particle structure reconstruction method based on a two-dimensional particle image of a rock core, and belongs to the technical field of three-dimensional image reconstruction. Background technique [0002] In petroleum geology research, the three-dimensional microstructure of rock core is the basis for studying the macroscopic physical properties of rock core. Reconstruction of the 3D grain structure of the core based on the 2D grain image of the core is one of the main means to obtain the information of the 3D grain structure of the core. At present, most of the methods for reconstructing the corresponding 3D structure based on 2D images of cores focus on the 3D reconstruction of pores, while relatively little research has been done on the 3D spatial distribution of mineral particles in cores. In the absence of research...

AI Technical Summary

Problems solved by technology

But its biggest disadvantage is that it requires large-scale calculations, so the reconstruction of the microscopic three-dimensional particle structure is very time-consuming and the reconstruction effect is not ideal.

The application of the maximum entropy principle to study the reconstruction of the microstructure is mainly aimed at the planar microstructure, but there is no report on the reconstruction of the three-dimensional particle structure of the core based on the maximum entropy principle.

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