3D Reconstruction Method of Heterogeneous Core Based on Hyperdimension

Abstract

The invention relates to a method for three-dimensional reconstruction of heterogeneous rock core based on hyperdimension. This method is based on the 3D modeling problem of 2D images of porous media, and utilizes the advantage of using hyperdimensional real cores to build a dictionary, and reconstructs heterogeneous cores through prior information. Specifically, it is proposed to introduce a probability-based image block selection mechanism to establish the corresponding relationship between the two-dimensional image blocks in the hyperdimensional reconstruction dictionary and the number of 0 elements in the corresponding three-dimensional image blocks in the real rock core, and to select the elements in the dictionary by the method of probability selection. to maintain heterogeneous information. At the same time, by introducing the mechanism of random reconstruction starting point, it eliminates the phenomenon that heterogeneous clusters diffuse to homogeneous clusters when the original hyperdimensional reconstruction algorithm builds heterogeneous cores. On this basis, we give a heterogeneous reconstruction algorithm. The reconstructed 3D heterogeneous core structure can well maintain the heterogeneity characteristics of the 2D reference image, providing a good explanation for the real core microstructure.

Description

technical field [0001] The invention relates to a three-dimensional modeling method based on two-dimensional images, in particular to an ultra-dimensional three-dimensional reconstruction method for heterogeneous rock cores, belonging to the technical field of three-dimensional image reconstruction. Background technique [0002] Traditionally, we study the physical properties of porous media through physical property experiments, but the method is too complicated. Recently, the digital three-dimensional structure of porous media has become an important means for people to study the physical properties of porous media. People usually reconstruct its three-dimensional structure by obtaining a single two-dimensional image. At present, many methods have been proposed to reconstruct three-dimensional porous media, including multi-point geostatistical algorithm, simulated annealing algorithm, Gaussian random field reconstruction algorithm and so on. Most of these reconstruction m...

AI Technical Summary

Problems solved by technology

However, the original hyperdimensional reconstruction method can only be used for the reconstruction of homogeneous media, and it is a kind of random heterogeneity for the reconstruction of heterogeneous media.

Images