Non-topological consistent three-dimensional geological block tracking method based on visual observation

Abstract

The invention discloses a non-topological consistent three-dimensional geological block tracking method based on visual observation. The method comprises steps that (1), a three-dimensional ground level triangulation network model is introduced, and grid accuracy for grid division of the three-dimensional geological model space is set by a user; (2), fixed grid division of the three-dimensional ground level triangulation network model is carried out; (3), all the triangle information contained in each grid body is recorded; and (4), a diffusion block tracking method based on visual observationis utilized to acquire an outer surface triangle set corresponding to each block. The method is advantaged in that not only can model block tracking of the three-dimensional ground level triangulation network model having no topological consistency be carried out, but also the accurate result can be acquired on the condition that an original three-dimensional ground level triangulation network model has no topological consistency.

Description

technical field [0001] The invention relates to the technical field of three-dimensional geological modeling, in particular to a non-topologically consistent three-dimensional geological block tracking method based on visual observation. Background technique [0002] In 3D geological modeling, stratigraphic layers are represented by triangulation. Tracking the block refers to finding out a set of triangles in the triangular network that can be used as the surface of the block. When multiple layers intersect, if there is no topological disorder in the triangles of the intersecting parts of multiple layers, then these layers are said to have topological consistency. In order to ensure the topological consistency of the surface model before the traditional block tracking algorithm is executed, surface intersection and clipping operations are required. When the geological model is complex, multiple intersections and clippings make the TIN become dense and uneven near the inter...

AI Technical Summary

Problems solved by technology

When the geological model is complex, multiple intersections and clippings make the TIN become dense and uneven near the intersection line, and the size difference of the TIN becomes larger, making it difficult to obtain a topologically consistent TIN surface

Using the traditional block tracking algorithm to track blocks of this locally non-topologically consistent model will lead to unexpected errors: unclosed blocks may be obtained, and dog teeth may appear at intersections; it may also be completely missing blocks

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