Core Skeleton Extraction Method Based on Spatial Ball Outlink

Abstract

The invention relates to a method for extracting a core framework with an outlined space ball. The method comprises the following steps: (1) obtaining a core tetrahedron structure model, (2) simplifying the core tetrahedron structure model, and (3) extracting a core framework structure. According to the method provided by the invention, the core framework is extracted according to a tetrahedron outlined ball topological relation with the core tetrahedron structure model as the foundation, in combination with the features of the core model, so the topological consistency of the core framework structure and the core structure can be guaranteed, and compared with the prior art, the method is better in connectivity, free of the influence generated by the boundary quality of the model, high in accuracy, low in robustness, applicable to complex core structures and high in extraction efficiency of the core framework, and the method can be used for quickly extracting the core framework.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploration, and in particular relates to a method for extracting a core framework of petroleum reservoirs. Background technique [0002] Many macroscopic properties of petroleum reservoir media (such as permeability, capillary pressure, etc.) depend on the microstructure of rocks and the solid and solid pore structures that make up rocks. In terms of digital cores, the pore network model is widely used and can be used for model parametric analysis, such as the analysis of the pore shape and spatial distribution of the core and the study of microscopic seepage theory, etc., while the core skeleton is the basis for establishing the pore network model , which is helpful to build a core pore model, further analyze the pore shape and spatial distribution of the core, and improve the study of rock seepage law, thereby effectively improving oil recovery. [0003] At present, sand body skeleton models...

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Problems solved by technology

[0008] It can be seen from Table 1 that the existing skeleton extraction methods have the problems of poor skeleton connectivity, high robustness, low accuracy and low extraction efficiency when extracting core skeletons.

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