Geological hexahedron mesh smoothing method based on neighborhood acting force

A hexahedron and force technology, used in image data processing, 3D modeling, instrumentation, etc.

Inactive Publication Date: 2017-06-20
CHINA UNIV OF PETROLEUM (EAST CHINA)
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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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  • Geological hexahedron mesh smoothing method based on neighborhood acting force
  • Geological hexahedron mesh smoothing method based on neighborhood acting force
  • Geological hexahedron mesh smoothing method based on neighborhood acting force

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Embodiment Construction

[0073] The present invention is described in detail below in conjunction with accompanying drawing:

[0074] In the Laplacian algorithm for surface smoothing, the mesh vertex v i Smoothly move to its coplanar adjacent vertex v j The average position of , its moving offset where n is v i The number of adjacent vertices, w j Used to measure adjacent vertices v j The weight size in smooth movement, the simplest form is to use the same weight, ie w j =1 / n.

[0075] In the method of the present invention, the above-mentioned smoothing idea is extended, and the eight neighborhood hexahedral grids sharing the vertex around the vertex form a smoothing window, and the neighborhood hexahedral grids in the window are divided into different blocks, and the different volume pairs The size of the vertex repulsion force measures the different weights of the smooth movement of the vertex, and the resultant force of all the block forces determines the distance and direction of the final...

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Abstract

The invention discloses a geological hexahedron mesh smoothing method based on neighborhood acting force. The geological hexahedron mesh smoothing method comprises the following steps that each vertex of a three-dimensional hexahedron model is traversed; whether the vertex requires smoothing is judged; as for the vertex requiring smoothing, a neighborhood hexahedron mesh sharing the vertex is divided into different blocks according to the attribute value, and the mesh of the same attribute value belongs to the same block; each block is regarded as the "homopolarity" of a magnet, each homopolarity has the same repulsive acting force on the vertex, the acting force is measured by a space mutual acting force model based on a gravity model, and the movement direction and distance of the vertex under the independent acting force of each block are calculated; then the movement component of the vertex along the x-axis, the y-axis and the z-axis under the effect of resultant force of all the blocks is calculated; and the final smoothing position of the vertex is acquired. The original three-dimensional topological relation of the mesh is maintained in the smoothing process, and the sawtooth effect of three-dimensional geological region boundary expression can be reduced so that the smoothing result is enabled to meet 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/10G06T5/00
CPCG06T5/002G06T17/10
Inventor 王海起刘玉彭佳琦陈冉桂丽翟文龙费涛闫滨车磊
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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