Construction Method of Reservoir Core Multi-tissue Model Based on Micro-CT Technology

Abstract

The invention relates to a method for constructing a multi-tissue model of reservoir rock core based on Micro-CT technology. The method is based on the Micro-CT scanning image of the rock core, and reconstructs a Tetrahedral model of the core, and then build a model of the multi-tissue core. The multi-tissue model constructed by the present invention can effectively restore the structure of the reservoir core, improve the accuracy of the construction results of the multi-tissue model of the reservoir core, and lay the foundation for the next numerical analysis and simulation of the multi-tissue structure of the reservoir core, and is suitable for Construction of multi-tissue models for reservoir cores with complex structures and many details.

Description

technical field

[0001] The invention relates to model construction technology, in particular to a method for establishing a three-dimensional solid model based on the real structure of reservoir rock cores. Background technique

[0002] Reservoir rock is a natural heterogeneous material, which can be regarded as a heterogeneous multi-organization composite material composed of different mineral particles, mica and cracks with complex geometric shapes. There are great differences in the physical and mechanical properties of various tissues, and the interaction between various tissues directly affects the macroscopic mechanical properties and stress distribution characteristics of reservoir rocks. During ordinary petrophysical tests, it is difficult for researchers to observe and study the expansion of cracks inside rocks and determine the stress between various tissues. By constructing multi-tissue models of reservoir rocks, it is helpful for researchers to have a more in-de...

Examples

Embodiment Construction

[0058] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0059] Such as figure 1 Shown is a flowchart of a method for constructing a multi-tissue model of a reservoir rock core based on Micro-CT technology provided by an embodiment of the present invention. The method first performs image processing on the Micro-CT image of the rock core, and the image processing includes noise reduction and segmentation. Obtain the extracted data of the multi-tissue core, then use the Marching Cubes algorithm to build the core surface model, and finally calculate the core tetrahedron model through the constrained Delaunay tetrahedron subdivision algorithm. The size, position, relative positional relationship between each organization and the digital parameter information of each organization, divide the boundaries of each organization, accurately find the tetrahedral grid of each organization, and establish its multi-organiza...

technical field

[0001] The invention relates to model construction technology, in particular to a method for establishing a three-dimensional solid model based on the real structure of reservoir rock cores. Background technique

[0002] Reservoir rock is a natural heterogeneous material, which can be regarded as a heterogeneous multi-organization composite material composed of different mineral particles, mica and cracks with complex geometric shapes. There are great differences in the physical and mechanical properties of various tissues, and the interaction between various tissues directly affects the macroscopic mechanical properties and stress distribution characteristics of reservoir rocks. During ordinary petrophysical tests, it is difficult for researchers to observe and study the expansion of cracks inside rocks and determine the stress between various tissues. By constructing multi-tissue models of reservoir rocks, it is helpful for researchers to have a more in-de...

Examples

Embodiment Construction

[0058] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0059] Such as figure 1 Shown is a flowchart of a method for constructing a multi-tissue model of a reservoir rock core based on Micro-CT technology provided by an embodiment of the present invention. The method first performs image processing on the Micro-CT image of the rock core, and the image processing includes noise reduction and segmentation. Obtain the extracted data of the multi-tissue core, then use the Marching Cubes algorithm to build the core surface model, and finally calculate the core tetrahedron model through the constrained Delaunay tetrahedron subdivision algorithm. The size, position, relative positional relationship between each organization and the digital parameter information of each organization, divide the boundaries of each organization, accurately find the tetrahedral grid of each organization, and establish its multi-organiza...

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