A Smoothing Method of Geological Hexahedral Mesh Based on Neighborhood Force

Abstract

The invention discloses a geological hexahedral mesh smoothing method based on neighborhood forces, which includes the following steps: traversing each vertex of a three-dimensional hexahedral model; judging whether the vertex needs to be smoothed; for the vertex that needs to be smoothed, the vertices that share the vertex are The neighborhood hexahedral grid is divided into different blocks according to the attribute values. Grids with the same attribute values ​​belong to the same block; each block is regarded as the "same pole" of the magnet, and the same poles have repulsive forces on the vertices. , the force is measured using the spatial interaction force model based on the gravity model, and the movement direction and distance of the vertex under the individual force of each block are calculated; and then the movement direction and distance of the vertex along the x-axis, y-axis, and z-axis are calculated under the combined force of all blocks. The movement components in the three directions of the axis; thereby obtaining the final smooth position of the vertex. During the smoothing process, the invention not only maintains the original three-dimensional topological relationship of the grid, but also reduces the sawtooth effect expressed by the three-dimensional geological area boundary, so that the smoothing result conforms to the actual geological phenomenon.

Description

technical field [0001] The invention relates to the field of three-dimensional geological body grid smoothing methods, in particular to a geological hexahedral grid smoothing method based on neighborhood forces. Background technique [0002] The model voxels of true 3D geological body modeling usually adopt hexahedron, tetrahedron, prism, etc. Among them, the hexahedral grid has the advantages of regular organizational form, less number of grid cells and redivision times, and high calculation efficiency. It is widely used in body and reservoir modeling, and is supported by most commercial geological modeling, reservoir modeling and numerical simulation software. However, such voxels derived from rectangular grids have jagged effects when discretizing the 3D region boundaries. A high-precision fine geological model can reduce the influence of the sawtooth effect and improve the characterization accuracy, but even for a medium-scale geological body or oil reservoir, the fine ...

AI Technical Summary

Problems solved by technology

The above methods have their own advantages and disadvantages, and many scholars have made a lot of optimization and improvement on this basis, but for the 3D geological grid model, these smoothing methods will cause some problems when applied

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