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Three-dimensional geological structure modeling method and system based on composite grid

A grid system, three-dimensional geological technology, applied in the field of computational geometry and three-dimensional geological modeling, can solve problems affecting algorithm efficiency, and achieve the effect of fast query and positioning

Active Publication Date: 2013-08-07
BEIJING GOLDENSUN PETROLEUM TECH
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Problems solved by technology

Since the Delaunay grid stores the topological structure of points, lines, surfaces, and volumes, it must rely on loops when searching for a given coordinate position, which will greatly affect the efficiency of the involved algorithms

Method used

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  • Three-dimensional geological structure modeling method and system based on composite grid
  • Three-dimensional geological structure modeling method and system based on composite grid
  • Three-dimensional geological structure modeling method and system based on composite grid

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specific Embodiment 1

[0052] Such as Figure 6 As shown, the three-dimensional geological body structure modeling is taken as a specific example to illustrate the method flow of the present invention for constructing a three-dimensional geological body based on a composite grid.

[0053] In step S601, a hexahedral area to be modeled is given.

[0054] Step S602, select the origin of the hexahedral grid system and the respective grid step sizes and grid numbers in the x, y, and z directions, and generate an initial hexahedral grid system that is large enough to cover this area, such as Figure 7 As shown, and record the origin and the respective grid step size and grid number in the x, y, and z directions.

[0055] Step S603, divide each hexahedral grid unit of the initial hexahedral grid system in step S602 into five tetrahedrons in a unified order, such as Figure 8 shown, and record the number of tetrahedral units contained in each hexahedral grid unit. Figure 9 It is the five tetrahedrons that...

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Abstract

The invention embodiment discloses a three-dimensional geological structure modeling method and system based on a composite grid. The three-dimensional geological structure modeling method includes selecting a grid system area of structure modeling, selecting an origin of the grid system and the grid step size and number on the coordinate direction, and generating an initial hexahedral grid system; dividing each initial hexahedral grid unit into multiple tetrahedral grid units, and generating a tetrahedral grid system; numbering the multiple tetrahedral grid units, recording the number of the multiple tetrahedral grid units contained in each initial hexahedral grid unit, and generating topology relationship of the tetrahedral grid system; adding an actual boundary of a set geological body model, redividing the tetrahedral grid system, and generating a composite grid system; and adding well location data and cross section data of the three-dimensional geological body model into the composite grid system, and performing layer tracking and three-dimensional geological grid construction.

Description

technical field [0001] The present invention relates to the fields of computational geometry and three-dimensional geological modeling, in particular to a method and system for modeling three-dimensional geological body structures based on composite grids, specifically a method and system for generating two complementary grid systems, It can simulate any complex terrain, and can quickly query and locate the grid of the given coordinate position. Background technique [0002] Computational grid generation technology has always been an important branch in the field of petroleum exploration and development, and it has laid the foundation for many works, such as: contour algorithm, three-dimensional geological structure modeling, reservoir numerical simulation, etc. Computational grids are generally divided into two categories: structured grids and unstructured grids. Commonly used structured grids include rectangular grids, hexahedral grids, etc., while commonly used unstructu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/30
Inventor 赵明伟袁钢辉矫树春齐建军
Owner BEIJING GOLDENSUN PETROLEUM TECH
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