Heterogeneous rock core three-dimensional reconstruction method based on super dimension

Abstract

The invention relates to a heterogeneous rock core three-dimensional reconstruction method based on super dimension. The heterogeneous rock core three-dimensional reconstruction method based on superdimension is based on a three-dimensional modeling problem of a porous medium two-dimensional image, utilizes the advantage that the super dimension uses a real rock core to establish a dictionary, and reconstructs a heterogeneous rock core through prior information. The heterogeneous rock core three-dimensional reconstruction method based on super dimension includes the specific steps: bringing forward introduction of a probability-based image block selection mechanism, establishing the corresponding relationship between a two-dimensional image block and the number of 0 element in a three-dimensional image block in the real rock core in the super dimension reconstruction dictionary, and selecting the elements in the dictionary through a probability selection method so as to maintain the heterogeneous information; at the same time, introducing a mechanism of randomly reconstructing an origin to eliminate the phenomenon that the heterogeneous cluster is diffused to the homogeneous cluster when a heterogeneous rock core is established through an original super dimension reconstruction algorithm; and based on the above steps, providing a heterogeneous reconstruction algorithm. The reconstructed three-dimensional heterogeneous rock core structure can preferably maintain the heterogeneous characteristic of the two-dimensional reference image and provide a good explanation for a realrock 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...

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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.

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