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Seismic data decomposition method and system

A seismic data and seismic signal technology, applied in the field of seismic exploration and development, can solve the problem that the seismic signal processing technology is difficult to be further improved, etc.

Inactive Publication Date: 2018-03-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The inventor found that it is difficult to further improve the seismic signal processing technology developed based on the traditional linear stationary system theory

Method used

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  • Seismic data decomposition method and system
  • Seismic data decomposition method and system
  • Seismic data decomposition method and system

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Embodiment approach 1

[0018] figure 1 Flowchart for the steps of the seismic data decomposition method. In this embodiment, a seismic data decomposition method according to the present invention may include: 1) performing interpolation based on each local maximum and minimum of the seismic signal, and obtaining the upper envelope sequence value and The lower envelope sequence value of the seismic signal; 2) obtain the instantaneous average value of the seismic signal envelope based on the upper envelope sequence value and the lower envelope sequence value; 3) based on the seismic signal and The instantaneous average value of the envelope of the seismic signal obtains a first eigenmode function sequence; and 4) obtains all eigenmode function sequences based on the first eigenmode function sequence.

[0019] This embodiment can enhance the effective signal of decomposition, and improve the quality of seismic data to provide guarantee for subsequent fine processing and interpretation.

[0020] The s...

Embodiment approach 2

[0053] According to an embodiment of the present invention, a seismic data decomposition system is provided. The system may include: A) performing interpolation based on each local maximum value and minimum value of the seismic signal, and obtaining the upper envelope sequence value of the seismic signal and the unit of the lower envelope sequence value of the seismic signal; B) the unit that obtains the instantaneous average value of the seismic signal envelope based on the upper envelope sequence value and the lower envelope sequence value; C) based on the seismic signal and the instantaneous average value of the seismic signal envelope to obtain the unit of the first eigenmode function sequence; and D) based on the first eigenmode function sequence, obtain all the eigenmode functions Elements of a sequence of modal functions.

[0054] In this embodiment, the decomposed effective signals can be enhanced, and the quality of seismic data can be improved to provide guarantee fo...

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Abstract

The invention discloses a seismic data decomposition method and system. The method includes the following steps that: interpolation is performed on the basis of local maximum values and minimum valuesof seismic signals, so that the upper envelope sequence value and lower envelope sequence value of the seismic signals can be obtained; a seismic signal envelope instantaneous average value is obtained on the basis of the upper envelope sequence value and the lower envelope sequence value; a first intrinsic mode function sequence is obtained on the basis of the seismic signals and the seismic signal envelope instantaneous average value; and all intrinsic mode function sequences are obtained on the basis of the first intrinsic mode function sequence. With the method of the invention adopted, decomposed effective signals can be enhanced, and the improved quality of seismic data can provide a guarantee for subsequent fine processing and interpretation.

Description

technical field [0001] The invention relates to the field of seismic exploration and development, in particular to a seismic data decomposition method and system. Background technique [0002] In the field of seismic exploration and development, with the vigorous development of science and technology, geophysical signal processing has become an interdisciplinary and comprehensive research field, and various new methods and technologies are constantly being applied to the research and development of geophysical signals. deal with. Seismic signal is a complex nonlinear, non-stationary random signal. [0003] The inventors found that it is difficult to further improve the seismic signal processing technology developed based on the traditional linear stationary system theory. Therefore, it is necessary to develop a seismic data decomposition method and system that suppress noise background and highlight effective signals. [0004] The information disclosed in the background o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28
CPCG01V1/28
Inventor 吴永栓陈国金
Owner CHINA PETROLEUM & CHEM CORP