Preprocessing and segmentation threshold value determining method of volcanic CT images

A technology of CT images and volcanic rocks, applied in the field of research on volcanic rock reservoir characteristics, can solve the problems of analyzing volcanic rock reservoir space scale limitations

Inactive Publication Date: 2014-06-18
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a method for preprocessing CT images of volcanic rocks a

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  • Preprocessing and segmentation threshold value determining method of volcanic CT images
  • Preprocessing and segmentation threshold value determining method of volcanic CT images
  • Preprocessing and segmentation threshold value determining method of volcanic CT images

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[0089] Example 1: Taking the deep volcanic rock Yingcheng Formation of Xujiaweizi Fault Depression in Songliao Basin as an example, using the preprocessing method of volcanic CT image and the threshold segmentation method of 3D reconstruction volume to realize 3D reconstruction of volcanic CT image The specific steps of the binarization of the structure are:

[0090] (1) CT sampling of volcanic rocks: Considering the characteristics of various volcanic rocks in the Xujiaweizi fault depression, select representative rock samples (from eruptive facies, eruptive facies, immersion facies, volcanic channel facies and volcanic sedimentary facies Among the five lithofacies, the lithofacies / lithology that has a greater relationship with the distribution of oil and gas is selected. The representative rock samples in this study area are volcanic breccia, rhyolite, andesite, and tuff. The above four kinds of rock samples are used for industrial CT scanning experiments, as shown in Table 1; ...

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Abstract

The invention discloses a preprocessing and segmentation threshold value determining method of volcanic CT images. The method comprises the following steps that volcanic CT sampling is conducted; the volcanic 2D CT images are collected; 2D CT image data are preprocessed; the images are superimposed to form a three-dimensional data body; a three-dimensional reconstruction body binaryzation threshold value method is improved and determined; a three-dimensional reconstruction model of the volcanic CT images is built, and three-dimensional display is conducted. The method resolves the problem of the dimensional restriction of analysis of a volcanic storage space in the prior art, expands the application range of the CT technique, enables a large number of oil field researchers to quantitatively conduct three-dimensional reconstruction of the volcanic CT images more conveniently, and has scientificity and universality.

Description

technical field [0001] The invention belongs to the technical field of research on volcanic rock reservoir characteristics, and in particular relates to a method for preprocessing CT images of volcanic rocks and determining a segmentation threshold. Background technique [0002] Since Roentgen discovered X-rays in 1895, CT technology has developed rapidly. In the following hundred years, many imaging technologies have been developed, such as computed tomography (CT), magnetic resonance imaging (MRI), and positron emission tomography. technology (PET), single photon emission tomography (SPECT), ultrasound imaging. [0003] Computed tomography (CT) is a non-destructive detection technology that can detect changes in the internal structure of rock materials, and has become one of the important experimental methods for observing the internal structure changes and fracture evolution of rock materials. Raynaud (2008), Yang Gengshe (1999), Ge Xiurun (1999) studied the relationship...

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Application Information

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IPC IPC(8): G06T7/00G06T17/00
Inventor 王民王文广卢双舫
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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