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Generalized S transformation-based Q-value estimation method adopting spectral correlation coefficient

A spectral correlation coefficient, generalized technology, applied in the field of seismic signal processing, which can solve problems such as application limitations and inability to adjust according to actual needs.

Inactive Publication Date: 2017-11-14
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

The window function of the S-transform changes with the frequency in a fixed trend and cannot be adjusted according to actual needs, so its application is limited.

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  • Generalized S transformation-based Q-value estimation method adopting spectral correlation coefficient
  • Generalized S transformation-based Q-value estimation method adopting spectral correlation coefficient
  • Generalized S transformation-based Q-value estimation method adopting spectral correlation coefficient

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[0038] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0039] In recent years, with the development of time-frequency analysis methods, the combination of time-frequency analysis methods and frequency domain Q value estimation methods such as spectral ratio method can estimate the formation Q value. The time-frequency analysis methods such as Gabor transform, wavelet transform, S transform and generalized S transform can be used to obtain the amplitude spectrum by using the spectral correlation ...

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Abstract

The invention relates to a generalized S transformation-based Q-value estimation method adopting a spectral correlation coefficient. The method includes the following steps that: step 1, seismic data are inputted; step 2, generalized S transformation is performed on the seismic data, so that post-transformation seismic data can be obtained; step 3, the estimated amplitude spectrum and actual amplitude spectrum of the post-transformation seismic data are obtained; step 4, a spectral correlation coefficient is constructed based on the estimated amplitude spectrum and actual amplitude spectrum; and step 5, a Q value which appears when the spectral correlation coefficient is minimum is solved. With the method of the invention adopted, the problem of frequency band range selection can be avoided, certain noise resistance can be realized, and the influence of a time-frequency analysis method can be reduced.

Description

technical field [0001] The invention relates to the field of seismic signal processing, in particular to a method for estimating Q value of spectral correlation coefficient based on generalized S transform. Background technique [0002] At present, in the field of seismic signal processing, there are many methods for estimating Q (seismic wave attenuation quality factor) at home and abroad, mainly including time domain estimation methods, frequency domain estimation methods and inversion-like Q value estimation methods. Among them, the Q value estimation method in the frequency domain is a method that is widely used. In the process of Q value estimation, the amplitude spectrum needs to be extracted, and different time-frequency analysis methods can be used to extract the amplitude spectrum. In recent years, a variety of time-frequency analysis methods have been developed, which can be used to extract the amplitude spectrum, mainly including Gabor transform, wavelet transform...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30
CPCG01V1/30
Inventor 余青露居兴国李进邹少峰肖盈刘思思高艳霞祝媛媛
Owner CHINA PETROLEUM & CHEM CORP
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