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Pore and crack identification method and system based on two-dimensional core scanning image

A fracture recognition and scanning image technology, which is applied in image analysis, image data processing, character and pattern recognition, etc., can solve the problems of inability to accurately and efficiently segment pores and fractures, and quantitative analysis of pores and fracture characteristics, etc., to achieve good results. The effect of gas storage capacity and efficient division

Active Publication Date: 2022-03-22
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem that the existing technology cannot accurately and efficiently segment pores and fractures, and cannot perform quantitative analysis on the characteristics of pores and fractures, the present invention provides a two-dimensional core scanning image based Pore ​​and fracture identification method and system

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  • Pore and crack identification method and system based on two-dimensional core scanning image
  • Pore and crack identification method and system based on two-dimensional core scanning image

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[0041] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention.

[0042] The first aspect of the present invention discloses a method for identifying pores and fractures based on two-dimensional core scanning images. The method includes the following steps: Step S100, scanning and obtaining the initial two-dimensional image of the core plane; The image is filtered to obtain a two-dimensional image of the first core plane; step S300, image segmentation is performed on the two-dimensional image of the first core plane, and a second two-dimensional image of the core plane is obtained; step S400, based on the two-dimensional image of the second core plane, Extract the center coordinates of all pixels in each por...

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Abstract

The invention belongs to the technical field of oil and gas reservoir geological exploration, particularly relates to a pore and crack identification method and system based on a two-dimensional core scanning image, and aims to solve the problems that pores and cracks cannot be accurately and efficiently segmented and the characteristics of the pores and the cracks cannot be quantitatively analyzed in the prior art. The method comprises the following steps: scanning to obtain an initial rock core plane two-dimensional image, and filtering the initial rock core plane two-dimensional image to obtain a first rock core plane two-dimensional image; carrying out image segmentation to obtain a second rock core plane two-dimensional image; extracting the center coordinates of all pixel points of each pore space, obtaining the centroid of the corresponding pore space, and establishing a pore seam recognition function; if the numerical value of the aperture recognition function is greater than a preset characterization value, determining that the aperture space is a crack; otherwise, determining that the pore space is a pore; accurate pore and crack distribution information can be obtained, and effective guidance is provided for reservoir oil and gas exploitation.

Description

technical field [0001] The invention belongs to the technical field of geological exploration of oil and gas reservoirs, and in particular relates to a method and system for identifying pores and fractures based on two-dimensional core scanning images. Background technique [0002] The space in the reservoir rock that is not filled by mineral particles, cement or other solid substances is called the pore space of the rock; the pore space includes pores and fractures, etc., and the pores refer to the inter-granular and intra-granular fillers in the rock. Voids; cracks are various cracks formed during rock diagenesis, or under the action of various tectonic stresses to break rocks. [0003] The microscopic pore space of reservoir rocks, including the characteristics of pores and fractures (size, geometry, distribution and interconnection), directly reflects the seepage capacity of the reservoir, and can provide an important basis for reservoir evaluation. The characteristics ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06V20/69G06V10/26G06V10/30G06T7/62G06T7/66G06Q50/02
CPCG06T7/62G06T7/66G06Q50/02G01V1/306G06T7/11G01V1/30G01V2210/646
Inventor 李国梁杨继进吴建国
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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