A method and system for assigning properties to a three-dimensional geological body

Abstract

The application provides a three-dimensional geological body attribute assignment method and system, relates to the technical field of three-dimensional geological modeling, and solves the problems of judgment failure and assignment failure when a complex structure region is encountered in the prior art. The method comprises the following steps: extracting vertex coordinates and index information of all triangular facets on the surface of a three-dimensional geological body model to calculate an axis-aligned bounding box corresponding to each triangular facet; collecting minimum and maximum values of the axis-aligned bounding box in X, Y and Z directions to generate a plurality of to-be-judged points, and generating a vertical ray along the Z-axis direction for each to-be-judged point; retaining corresponding candidate facets and detecting effective intersection points between the candidate facets and the vertical ray; sorting each effective intersection point, determining the stratigraphic attribution of each to-be-judged point according to stratigraphic information of adjacent effective intersection points after sorting, and assigning corresponding attribute values. The application significantly improves the precision of geological attribute assignment.

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