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Method for detecting seismic data of controllable seismic sources on basis of multistage threshold median filtering

A detection method and seismic data technology, applied in seismic signal processing and other directions, can solve the problem of loss of signal details and other issues

Inactive Publication Date: 2015-04-08
JILIN UNIV
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Problems solved by technology

However, median filtering also has the problem of losing signal details

Method used

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  • Method for detecting seismic data of controllable seismic sources on basis of multistage threshold median filtering
  • Method for detecting seismic data of controllable seismic sources on basis of multistage threshold median filtering
  • Method for detecting seismic data of controllable seismic sources on basis of multistage threshold median filtering

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Embodiment Construction

[0030] Below in conjunction with accompanying drawing and embodiment do further detailed description:

[0031] A detection method for vibroseis seismic data based on threshold multi-level median filtering, comprising the following steps:

[0032] a. Input the non-correlated original single-shot record S of the vibrator, S=[s 1 s 2 … s 152 ];

[0033] b. Take the first channel data s of S 1 ;

[0034] c. According to the formula E ( s i ) = 1 k Σ j = 1 k | x i ( j ) | , average E ( s 1 ) = 1 17001 ...

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Abstract

The invention relates to a method for detecting seismic data of controllable seismic sources on the basis of multistage threshold median filtering. The method includes defining strong-impulse noise thresholds according to mathematical and statistical characteristics of original uncorrelated seismic data of the controllable seismic sources; carrying out multistage median filtering on the original uncorrelated seismic data of the controllable seismic sources in imported multistage median filtering processing procedures to effectively suppress impulse noise, and ultimately effectively detecting the seismic data of the controllable seismic sources by the aid of mutual correlation detection processes on the basis of the suppressed impulse noise. The method has the advantages that the high-signal-to-noise-ratio method for detecting the data is provided for seismic prospecting on the controllable seismic sources near urban districts without increasing the construction costs, and obvious suppression effects can be realized for various types of human noise and random noise; the method not only is applicable to monitoring the seismic data of the conventional controllable seismic sources, but also is particularly effective for the seismic data of the controllable seismic sources under the condition of severe impulse noise interference; the method further can be applied to seismic prospecting conditions with loud background noise, which includes various types of traffic noise and electric noise, near the urban districts.

Description

Technical field: [0001] The invention relates to a method for preprocessing seismic prospecting data. It is especially suitable for the effective detection of the original non-correlated seismic data of the vibrator under the condition of impulse noise. Background technique: [0002] Impulse noise refers to the noise with short duration. The impulsive noise contained in seismic data is mainly composed of electromagnetic impulse noise inside the vibroseis system, in the background, and vibration noise of the surrounding environment. According to the difference between impulse noise and effective signal strength, it can be divided into strong, medium and weak impulse noise. Impulse noise is ubiquitous in the process of field seismic exploration data acquisition. [0003] At present, the traditional vibrator data adopts cross-correlation detection technology. When strong or medium pulse noise occurs during the acquisition process, the noise level will increase in a relativel...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/36
Inventor 姜弢陈振振贾海青徐学纯林君
Owner JILIN UNIV
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