Three-dimensional stratum modeling method based on geological map tangent section

Abstract

The invention discloses a three-dimensional stratum modeling method based on a geological map-cut profile. The method comprises the steps: S1, editing the map-cut profile, and completing the setting of basic parameters needed by modeling; s2, discrete sampling is conducted on the stratum boundary and the inner and outer areas, and discrete distribution of stratum attributes in space is obtained; s3, performing interpolation calculation on the stratum three-dimensional space discrete points to generate a three-dimensional space stratum attribute data field; s4, contour surface extraction is carried out from the three-dimensional space stratum attribute data field, and a three-dimensional contour surface of the stratum is obtained; s5, repeating the steps S2 to S4 to obtain three-dimensionalcontour surfaces of all stratums; s6, spatial splicing is conducted on the surfaces of the three-dimensional contours of all the stratums, and three-dimensional stratum modeling is completed. According to the method, the problems of complex contour matching, bifurcation, corresponding triangulation network connection and the like in a two-dimensional contour reconstruction method are avoided, anda high-precision three-dimensional vector geologic model can be obtained; the method is suitable for stratum modeling under any complex condition, the modeling efficiency is high, and the applicationrange is wide.

Description

technical field [0001] The invention relates to the fields of geology, mineral resources and engineering, in particular to a three-dimensional stratum modeling method based on cut sections of geological maps. Background technique [0002] 3D geological modeling has always been a technical hotspot and difficult issue in the research of engineering, geology, and mining industries. Restoring the underground geological structure and petrophysical parameters through limited geological data plays a very important role in engineering geological analysis, oil and gas and mineral exploration and development. Due to the diversity and multiple solutions of geological data and the limited means of data acquisition, 3D geological modeling is difficult and the implementation process is complicated. Among them, 3D geological modeling using geological map cut sections is a common modeling method. [0003] Map-cut section modeling is to draw a series of parallel (or nearly parallel) sectio...

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Problems solved by technology

[0043] Aiming at the problems existing in the existing modeling methods, the present invention provides a three-dimensional stratum modeling method based on geological map cut-sections, which combines grid modeling and geological model surface reconstruction, and avoids complex contours Correspondence, triangulation network connection and other issues, and can obtain a high-precision 3D vector geological model; and also solve the sampling accuracy and data volume in the modeling process, the calculation of the 3D data field by the global interpolation method, and the accuracy of isosurface extraction, etc. question

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