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Seismic data speed spectrum automatic pickup method and device

A seismic data, automatic picking technology, applied in the direction of seismic signal processing, etc., can solve the problem of low accuracy of velocity spectrum picking

Active Publication Date: 2016-12-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the accuracy of velocity spectrum picking is not high in the above-mentioned prior art

Method used

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  • Seismic data speed spectrum automatic pickup method and device
  • Seismic data speed spectrum automatic pickup method and device
  • Seismic data speed spectrum automatic pickup method and device

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Embodiment approach 1

[0017] figure 1 is a block diagram illustrating the steps of a method for automatic picking of seismic data velocity spectra according to an exemplary embodiment of the present invention.

[0018] In this embodiment, the method for automatically picking up the velocity spectrum of seismic data may include the following steps: step 101, performing denoising preprocessing on the velocity spectrum of the common center point seismic data; step 102, obtaining the current time point based on the preprocessed velocity spectrum The position of the maximum amplitude nearby is used as the current pick-up velocity point; step 103, based on the current pick-up velocity point, the velocity spectrum is denoised; position, as the next pick-up speed point; and step 105, judge whether to obtain the required number of pick-up speed points, if not, then use the next pick-up speed point as the current pick-up speed point, and return to execute the above-mentioned pick-up speed point based on the ...

Embodiment approach 2

[0051] In this embodiment, a device for automatically picking up the seismic data velocity spectrum is provided, and the device may include the following components: a component for denoising and preprocessing the velocity spectrum of the common center point seismic data; The velocity spectrum obtains the position of the maximum amplitude near the current time point as the component of the current picked velocity point; the component used to denoise the velocity spectrum based on the currently picked velocity point; it is used to obtain the following velocity spectrum based on the denoised velocity spectrum The position of the maximum amplitude near a time point is used as the next pick-up speed point; and it is used to judge whether to obtain the required number of pick-up speed points. If not, the next pick-up speed point is used as the current pick-up speed point , return to perform the above step of denoising the velocity spectrum based on the current picked-up velocity poi...

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Abstract

The invention discloses a seismic data speed spectrum automatic pickup method and device. The method comprises the following steps: a speed spectrum of seismic data of a common midpoint is subjected to denoising preprocessing operation; based on the pretreated speed spectrum, a position of a maximum vibration amplitude near a current time point is obtained as a current pickup speed point; based on the current pickup speed point, the speed spectrum is subjected to denoising processing operation; based on the post-denoising-processing speed spectrum, a position of a maximum vibration amplitude near a next time point is obtained as a next pickup speed point; whether a required number of pickup speed points are obtained is determined; if the required number of pickup speed points are not obtained, the next pickup speed point is used as the current pickup speed point, and the current step goes back to the previous step of subjecting the speed spectrum to the denoising processing operation based on the current pickup speed point; if the required number of pickup speed points are obtained, all of the pickup speed points are output, and only pickup speed points having speed values that rise over time are kept.

Description

technical field [0001] The invention relates to the field of seismic data processing, in particular to a method and device for automatically picking up seismic data velocity spectrum. Background technique [0002] With the development of seismic exploration in the direction of multi-dimensional, multi-component and high-precision, the data of seismic data increases geometrically. How to improve the efficiency and accuracy of picking up a large number of velocity spectra in the process of seismic data processing has become the main reason that affects the progress of seismic data processing. [0003] At present, picking up the velocity spectrum is mainly realized by manual picking and computer automatic picking. The work efficiency of manual picking up the velocity spectrum is low, but the automatic picking up of the velocity spectrum by the computer can greatly improve the work efficiency. At present, computer automatic picking methods mainly include nonlinear optimization ...

Claims

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Application Information

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IPC IPC(8): G01V1/28
Inventor 杨文广许自龙严尹芳宋志翔亢永敢朱凌燕
Owner CHINA PETROLEUM & CHEM CORP
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