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

A crack identification and scanning image technology, applied in image analysis, image data processing, character and pattern recognition, etc., can solve the problems of inability to quantitatively analyze pores, crack features, and inability to accurately and efficiently segment pores and cracks, and achieve good results. The effect of gas storage capacity and efficient segmentation

Active Publication Date: 2022-04-26
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 fracture identification method and system based on two-dimensional core scanning image
  • Pore ​​and fracture identification method and system based on two-dimensional core scanning image
  • Pore ​​and fracture 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 geological exploration of oil and gas reservoirs, and specifically relates to a method and system for identifying pores and fractures based on two-dimensional core scanning images, aiming to solve the problem that existing technologies cannot accurately and efficiently segment pores and fractures, and cannot identify pores, The problem of quantitative analysis of fracture characteristics; the method includes scanning to obtain the initial two-dimensional image of the core plane, filtering it to obtain the first two-dimensional image of the core plane; and then performing image segmentation to obtain the second two-dimensional image of the core plane; Extract the center coordinates of all pixels in each pore space, obtain the centroid of the corresponding pore space, and establish a pore identification function; if the value of the pore identification function is greater than the preset characteristic value, it is determined that the pore space is a crack; otherwise, it is determined The pore space is a pore; the invention can obtain accurate pore and fracture distribution information, and provide effective guidance 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 Patents(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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