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Method for recognizing rock type

A recognition method and rock technology, applied in character and pattern recognition, image data processing, instruments, etc., can solve the problems that it is difficult to express the difference between different rock types, the color features, texture features and shape features are not obvious, and the FMI image has a large amount of information. , to achieve the effect of promoting popularization and promotion

Inactive Publication Date: 2011-01-19
BEIJING DONGFANG BENTENG INFORMATION TECH
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Problems solved by technology

[0010] The present invention proposes a method for identifying rock types to solve the following technical problems in the prior art: FMI images contain a large amount of information, color features, texture features, and shape features are not obvious, and there are certain differences between rock types. similarities, difficulty in expressing distinctions between different rock types, etc.

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Embodiment Construction

[0040] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0041] Such as figure 1 Shown, the identification method of rock type of the present invention specifically comprises the following steps:

[0042] (1) Read the FMI color image of the rock to be identified;

[0043] (2) Perform preprocessing such as filtering, denoising, and smoothing on the read FMI color image to improve the quality of the FMI color image, and convert the FMI color image into Figure 4 (a) FMI grayscale image shown;

[0044] (3) According to the characteristics that the black area, white area and intermediate transition color area shared by the rock FMI gray-scale image are gathered in three gray-scale value intervals, set three thresholds θ for Canny edge detection on the FMI gray-scale image 1 , θ 2 and θ 3 ,

[0045] (4) Set the threshold θ 1 Combined with the Canny operator, the Canny edge detection is performed on the FMI grayscale image, ...

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Abstract

The invention provides a method for recognizing a rock type. The method comprises the following steps of: (1) preprocessing a formation microresistivity imager (FMI) color image of a rock to be recognized and converting the FMI color image into an FMI gray scale image; (2) setting three threshold values for performing Canny edge detection on the FMI gray scale image; (3) performing three times of Canny edge detection on the FMI gray scale image by using the three threshold values; (4) evaluating three box dimension characteristics of the rock to be recognized by a box dimension characteristic computing method; and (5) recognizing the type of the rock to be recognized according to the evaluated box dimension characteristics of the rock to be recognized by using a nearest neighbor classifier. The method has the advantages of laying a basis for the intelligent recognition of the FMI image, promoting the research of an intelligentized high-efficiency FMI image recognition system and indirectly facilitating the popularization of FMI logging technology and can be widely applied to the aspects of oil exploration, FMI image processing, development of intelligent logging instruments and the like.

Description

technical field [0001] The invention provides a method for identifying rock types, which can be applied to fields such as petroleum exploration, FMI image processing, and development of intelligent logging instruments. Background technique [0002] With the increasing complexity of oil and gas exploration objects, in many cases, the use of traditional logging methods will have problems such as difficulty in identifying effective layers in exploration wells and low detection accuracy of reserve parameters, which seriously affects the objective evaluation of oil and gas reserves. FMI imaging technology not only provides rich geological information of fractured reservoirs, but also can be used for qualitative identification and quantitative interpretation of fractured reservoirs, providing an effective means for objective evaluation of reservoirs. [0003] FMI (Formation Microresistivity Imager, micro-resistivity scanning imaging) logging technology is to use the electrode to e...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06T7/00
CPCG06K9/00G06V10/30
Inventor 郝红卫王志彬殷绪成邱晓宁
Owner BEIJING DONGFANG BENTENG INFORMATION TECH
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