Rock core fracture extraction method and system

An extraction method and core technology, which are applied in the field of core crack extraction, can solve the problem of low accuracy in extracting core cracks, and achieve the effect of good extraction and improved accuracy.

Active Publication Date: 2018-08-03
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0005] In order to overcome the inaccuracy of extracting core fractures existing in the p

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  • Rock core fracture extraction method and system
  • Rock core fracture extraction method and system
  • Rock core fracture extraction method and system

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[0040] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0041] figure 1 It is a flowchart of a method for extracting core fractures according to an embodiment of the present invention. Such as figure 1 As shown, a core fracture extraction method includes: step S1, segment the core image to be extracted into multiple superpixels; step S2, input the image within the minimum circumscribed rectangle of each superpixel into the pre-acquired fracture recognition model , to obtain the judgment result of whether the images in each minimum circumscribed rectangle contain core fractures; step S3, according to the judgment results of all the images in the minimum circumscribed rectangle, obtain the core fractures in the core image to be...

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Abstract

The invention provides a rock core fracture extraction method and a rock core fracture extraction system. The rock core fracture extraction method comprises the steps of: dividing a rock core image tobe extracted into a plurality of superpixels; inputting an image in a minimum circumscribed rectangle of each superpixel into a pre-obtained fracture identification model, and acquiring a judgment result indicating whether the image in each minimum circumscribed rectangle comprises a rock core fracture; and acquiring the rock core fracture according to the judgment results of the images in all ofthe minimum circumscribed rectangles. The rock core fracture extraction system comprises an image segmentation module, a judgment module and an extraction module, wherein the image segmentation module is configured to segmenting the rock core image to be extracted into the plurality of superpixels; the judgment module is configured to acquire the judgment result indicating whether the image in each of the minimum circumscribed rectangles comprises the rock core crack; and the extraction module is configured to acquire the rock core fracture according to the judgment results of the images in all of the minimum circumscribed rectangles. The rock core fracture extraction method and the rock core fracture extraction system segment the rock core image into superpixels, and extract the rock core fracture by using the fracture identification model, thereby improving the precision of rock core fracture extraction.

Description

technical field [0001] The invention relates to the technical field of geological exploration, and more specifically, to a method and system for extracting rock core fractures. Background technique [0002] In the field of petroleum geology, fracture identification is an important content of reservoir and reservoir heterogeneity research, which is of great significance to oil and gas development and oil recovery improvement. The rock is mechanically damaged under the action of stress, and the fracture structure without obvious displacement is called a crack. Due to the existence of fractures, well-developed fractures and good connectivity, shale and carbonate reservoirs can become valuable reservoirs, and tight reservoirs have better migration channels. [0003] Extracting core fractures can accurately understand the development degree of core fractures. There are mainly two aspects that can be applied. The first aspect is to accurately judge the development degree of rese...

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Application Information

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IPC IPC(8): G06T7/00G06T7/10G01V8/02
CPCG01V8/02G06T7/0002G06T7/10G06T2207/10024G06T2207/20081G06T2207/20084G06T2207/30184
Inventor 董少群曾联波吕文雅徐翔
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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