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Delaunay triangulation network subdividing method based on space curved surface constraint

A technology of surface constraint and triangulation, applied in the field of data visualization, can solve the problems of not being a geological exploration method and not considering multiple faults, and achieving the effect of good compatibility and good adaptability

Inactive Publication Date: 2012-12-19
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0017] Insufficiency of the above methods: the above schemes are all aimed at a specific application, or for a specific geological structure, and are not a geological exploration method suitable for various geology and various applications
[0018] At present, there are many constrained Delaunay segmentation methods at home and abroad, but these methods have their limitations for petroleum geological exploration: most of them are aimed at layers without faults, or take normal faults and reverse faults into account, but the situation of multiple faults is not considered ; Existing methods are not true triangulation based on spatial constraints, but triangulation based on the spatial topological relationship of the original point set itself

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  • Delaunay triangulation network subdividing method based on space curved surface constraint
  • Delaunay triangulation network subdividing method based on space curved surface constraint
  • Delaunay triangulation network subdividing method based on space curved surface constraint

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Embodiment Construction

[0039] First define some basic geological structures and scheme terms:

[0040] Strata: For the convenience of research, geological bodies are often divided into several strata. In order to simplify the model, it is generally considered that the geological properties of the same stratum are exactly the same. Different formations often have different properties.

[0041] Fault plane: It is called cross-section, which is the surface formed by the fracture of the formation due to excessive pulling or extrusion. Faults can be divided into global faults and local faults.

[0042] Horizon: It refers to a specific position in the stratigraphic sequence. The stratigraphic horizon can be the boundary of a stratigraphic unit, or it can be a marker layer belonging to a specific era, etc.

[0043] A Delaunay triangulation method based on spatial surface constraints, such as figure 1 shown, including the following steps:

[0044] Step 1. Import horizon data and fault data:

[0045] The...

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Abstract

The invention discloses a Delaunay triangulation network subdividing method based on space curved surface constraint. The method comprises the following steps of: rebuilding a space fractured layer curved surface by fractured layer data; initially rebuilding layer positions to acquire a space triangular curved surface; finding out a space triangle which crosses over the fracture surface in the area in which a reverse fracture layer exits and deleting the space triangle; filling a hole or a gap formed by deleting the triangle to ensure that a boundary of the space triangulation network is a convex shell or the edge generated by filling the edge of the area concave at random cannot cross over the fracture surface. The method has the active effects that a triangular part of the three-dimensional curved surface under the space curved surface constraint is proposed, so that the ground layer rebuilding problem under a complicated geologic structure condition is solved, and a technical support is provided for interpolation of layer positions, drawing of contour lines and the like.

Description

technical field [0001] The invention belongs to the technical field of data visualization, in particular to a Delaunay triangulation method based on spatial surface constraints. Background technique [0002] Modern data visualization technology refers to the related theories, methods and technologies that use computer graphics and image processing technologies to convert data into graphics or images and display them on the screen, and perform interactive processing. Triangulation is a proven method and tool for data visualization. [0003] According to the category of the object to be divided, the triangulation problem can be divided into the triangulation of the specified area and the triangulation of the given point set. According to the dimension of the subdivision object, the triangulation problem can be divided into plane triangulation, three-dimensional triangulation and high-dimensional triangulation. The subdivision object of the triangulation of the surface point ...

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Application Information

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IPC IPC(8): G06T17/20
Inventor 鲁才廖家志胡光岷
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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