Automatic crack detection method based on seismic coherence cube slice

An automatic detection and coherent volume technology, which is applied in the field of oil exploration image processing, can solve the problems of information waste, lack of mathematical description in interpretation of seismic coherent volume slices, and inaccurate interpretation results, so as to realize automation, maintain continuity and integrity Sexuality, the effect of saving manpower and material resources

Active Publication Date: 2018-12-07
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0005] The purpose of the present invention is: in order to solve the lack of mathematical description of existing seismic coherent volume slice interpretation, rely on the experience and intuition of seismic interpreters, and only interpr

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  • Automatic crack detection method based on seismic coherence cube slice
  • Automatic crack detection method based on seismic coherence cube slice
  • Automatic crack detection method based on seismic coherence cube slice

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Embodiment 1

[0102] Such as Figure 1 to Figure 12 As shown, this embodiment provides a method for automatic crack detection based on seismic coherent volume slices, including the following steps:

[0103] S1, Median filter denoising

[0104] Input 2D seismic coherent volume slice data, and perform median filtering on the input 2D seismic coherent volume slice data to remove salt and pepper noise caused by insufficient coherence algorithm and data acquisition errors;

[0105] In the S1, a 5×5 two-dimensional template is used to perform median filtering on the input 2D seismic coherent volume slice data;

[0106] S2, normalization processing

[0107] The median-filtered data is normalized using the dispersion standardization method, so that the variation range of the median-filtered 2D seismic coherent volume slice data is between [0,-1];

[0108] In the S2, the standardization method of the deviation is used to normalize the data after the median filter, which specifically includes the ...

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Abstract

The invention discloses an automatic crack detection method based on a seismic coherence cube slice and relates to the technical field of petroleum exploration image processing. The method comprises the following steps of (S1) median filtering and denoising, (S2) normalization processing, (S3) bilateral filtering and Laplace filtering processing, (S4) the removal of isolated noise with connected component marking, (S5) morphological operation processing, (S6) the repair of a 2D seismic coherence cube slice with a flood water filling algorithm, (S7) the extraction of a framework by using an FPAalgorithm, (S8) the enhancement of a crack continuity with a MyPadding function, (S9) the marking of the connected component, (S10) processing by using a least squares straight line fitting method, and (S11) classification display including the step of classifying cracks according to the range of different azimuth angles to obtain a final crack automatic detection result of 2D seismic coherence cube slice data. According to the method, the seismic coherence cube slice data can be directly used to extract crack information, the calculation of the azimuth of the cracks is achieved, the crack interpretation efficiency of the seismic slice is greatly improved, and a lot of manpower and material resource costs are saved.

Description

technical field [0001] The invention relates to the technical field of oil exploration image processing, and more specifically relates to an automatic fracture detection method based on seismic coherent volume slices. Background technique [0002] At present, with the improvement of oil and gas exploration and development technology at home and abroad, people pay more and more attention to the development of complex lithology and fractured oil and gas fields under the background that the large oil and gas fields that are easy to be exploited worldwide have basically been developed. Seismic coherent volume slicing technology is a fine interpretation technology of seismic data developed to adapt to this trend. It refers to the two-dimensional geophysical significance extracted in the form of plane or curved surface along a certain direction of the three-dimensional seismic data volume. Spatial attribute carrier. [0003] The most basic characteristics of fractures in seismic ...

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Application Information

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IPC IPC(8): G01V1/28G01V1/30
Inventor 彭真明廖龙彭凌冰汪春宇张天放李曙吴昊陈颖频曹思颖陶冰洁何艳敏
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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