Multi-point statistical three-dimensional geological model automatic reconstruction method 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 method is characterized by directly using a two-dimensional transverse and longitudinal geological section to reconstruct a three-dimensional geological model, and according to the spatial cross relation of a known section, dividing a three-dimensional modeling space into several subareas, wherein each subarea is surrounded by N (the N is greater than or equal to 1 and is less than or equal to 6) subsections; for a unknown attribute positiondistributed in each subarea, firstly, according to the position, acquiring the N surrounding subsections, and then, according to a set neighborhood parameter and a known data point, customizing dataevents at X, Y and Z directions, using the corresponding data event to scan the subsection at the corresponding direction, and acquiring N condition probability density function; and then, using a reasonable probability fusion strategy to acquire joint probability density distribution, and finally acquiring the attribute value of the position. The method can be popularized and applied in various kinds of three-dimensional geological information systems, geographic information systems and geologic 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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