Tri-dimensional geologic body automatic reconfiguration method based on discrete point set

A technology of automatic reconstruction and geological body, applied in the field of geoscience information processing, to achieve the effect of simple data structure, avoiding strong interaction and wide application

Inactive Publication Date: 2008-01-16
CHINA UNIV OF GEOSCIENCES (WUHAN)
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Therefore, such methods are rarely used in geological modeling software

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  • Tri-dimensional geologic body automatic reconfiguration method based on discrete point set

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Embodiment

[0025] 1. Data discrete interpolation processing to obtain a d-dimensional scatter set V d R d , R is a d-dimensional Euclidean space, d=3;

[0026] 2. Divide the scattered point set V into m categories (V0, V1, Vt, ..., Vm-1), each type of point set corresponds to the corresponding geological age, and make the geological age of Vt-1 earlier than Geological age of Vt;

[0027] 3. Cyclic calculation of the minimum Convex Hull (convex hull) Ct of Vt (0≤t≤m) to generate a closed set of Fecets (facets) Ft;

[0028] 4. Loop cutting operation, use Ft to cut Ft-1 to get new Ft-1;

[0029] 5. Cyclic subdivision operation, with Vt point set, with Ft as limiting condition, subdivision obtains d+1-dimensional single grid set Mt (if d=3, then Mt is a tetrahedral grid);

[0030] 6. The geological entity St in EB-Rep is composed of Ft and Mt;

[0031] 7. Establish the topological relationship between S0,..., St,..., Sm according to the shared situation of Facet (facet) in F0,..., Ft,....

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Abstract

The invention is an automatic restructuring algorithm of three-dimensional geological body based on definite scattered point collection, which carries out data storage management with compound data structure of grid model and E-Rep model. Through EB-Rep compound model, the invention combines B-Rep model's advantages such as simple structure and small data volume with the automatic restructuring property of TEN model, thus realizing the preliminary automatic model establishment of geological body through TEN's restriction of automatic segmentation, and then makes BOOL algorithm on TEN grid collection according to the sequence of geological years so as to obtain the preliminary grid model of geological body, and eventually obtains the compound geological body model through the surface extracting and simplification of grid model. The invention effectively solves the problem that surface model does not support automatic model establishment, and body segmentation model supporting automatic model establishment is impractical because of the huge data volume; the algorithm can adapt to a plurality of data sources and find wide application in a variety of professional software.

Description

technical field [0001] The invention relates to the technical field of geoscience information processing, in particular to three-dimensional graphics, three-dimensional geological modeling and grid simplification methods. Background technique [0002] Automatic reconstruction of 3D geological bodies is a geospatial dynamic modeling technology, a key technology in geological information systems, and one of the hot and difficult issues in geospatial modeling research. Geospatial modeling is divided into five stages according to the technical level, namely, model visualization stage, model measurement stage, model analysis stage, model update stage and temporal modeling stage; the first three stages belong to static modeling, and the last two stages belong to Dynamic modeling phase. Due to the complexity of geological conditions, most of the current geological modeling systems at home and abroad use static interactive modeling methods. [0003] The earliest geospatial modelin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/50G06T17/05
Inventor 何珍文吴冲龙田宜平刘刚张夏林翁正平毛小平汪新庆刘军旗孔春芳李伟忠李新川张志庭綦广
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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