Automatic reconstruction method of multi-point statistical 3D geological model based on local search strategy

Abstract

The invention discloses a multi-point statistical three-dimensional geological model automatic reconstruction method based on a local search strategy. The three-dimensional geological model is directly reconstructed by two-dimensional horizontal and vertical geological sections, and the three-dimensional modeling space is reconstructed according to the spatial interlacing relationship of the known sections. Divided into several sub-regions, each sub-region is surrounded by N (1≤N≤6) sub-sections; for the unknown attribute position distributed in each sub-region, first obtain the surrounding N sub-sections according to its position, and then according to the set Customize the data events in the X, Y, and Z directions with the specified neighborhood parameters and known data points, scan the sub-sections in the corresponding directions with the corresponding data events, and obtain N conditional probability density functions; then use a reasonable probability The fusion strategy obtains the joint probability density distribution, and finally obtains the attribute value of the location. The invention can be popularized and applied in various three-dimensional geological information systems, geographic information systems, geological modeling and simulation systems.

Description

technical field [0001] The invention relates to the fields of three-dimensional geological modeling and geological statistical simulation, in particular to a multi-point statistical three-dimensional geological model automatic reconstruction method based on a local search strategy. Background technique [0002] 3D geological modeling and visualization technology is one of the core technologies in the field of geospatial information science, and also the key and basic technology for the construction of 3D geographic and geological information systems. The three-dimensional visual representation of geological structure can provide a more realistic and intuitive description of underground geological phenomena and structures, and has played an important role in the quantitative evaluation of groundwater, oil and solid mineral resources. Spatial heterogeneity and connectivity of reservoirs play an important controlling role in subsurface fluid migration and accumulation, which is...

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Problems solved by technology

Existing multi-point statistical reconstruction methods for global search and matching of all known data are also limited by their computational efficiency

However, it is difficult to ensure the spatial continuity of the reconstruction results in different directions in the whole space by using multi-point statistical techniques to simulate two-dimensional slices to gradually fill the three-dimensional space domain.

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