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Seismic wave field separation method

A wave field separation and seismic wave technology, which is applied in the field of multi-wave seismic exploration data processing, can solve problems such as unsatisfactory multi-wave field separation, and achieve the effects of easy implementation, improved accuracy and reliability, and improved separation accuracy

Active Publication Date: 2017-09-08
CHINA MERCHANTS CHONGQING COMM RES & DESIGN INST
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Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies existing in the prior art, the purpose of the present invention is to provide a seismic wave field separation method, which solves the problem that the prior art cannot meet the needs of multi-wave field separation, and separates the seismic wave signal into direct wave, surface wave, reflection waves, refracted waves, to meet the needs of wave field separation of seismic waves in practical applications

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Embodiment Construction

[0021] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] like figure 1 Described, a kind of seismic wave field separation method, adopts geophone and wavelet filter to acquire and analyze seismic wave; specifically comprises the following steps:

[0023] Step 1: Use the geophone to obtain the initial seismic wave signal, and use the first wavelet filter to denoise the initial seismic wave signal;

[0024] Step 2: Transform the noise-reduced seismic wave signal in the F-K frequency domain, and separate the wave field in the F-K domain, using the frequency characteristic. The separation is to use the frequency characteristic to obtain the seismic source signal by using the drop weight method (the seismic wave source signal enters the ground from different angles) ), separate the surface wave in the seismic wave signal, and obtain the seismic wave signal including refl...

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Abstract

The invention relates to a seismic wave field separation method. A demodulator, a wavelet filter and engineering seismograph data preprocessing software are utilized for acquiring and analyzing a seismic wave. The method comprises the following steps of acquiring an initial seismic wave signal by means of a demodulator, and performing noise reduction on the initial seismic wave signal through the wavelet filter; performing F-K frequency domain conversion, reverse-F-K frequency domain conversion, linear Radon conversion and reverse Radon conversion on the seismic wave signal after noise reduction, thereby separating out a direct wave, a reflected wave, a refracted wave and a surface wave signal in the seismic wave signal. The seismic wave field separation method effectively improves precision and reliability in wave field separation.

Description

technical field [0001] The invention relates to a multi-wave seismic exploration data processing method, in particular to a method capable of separating wave fields from seismic waves extracted during the exploration process. Background technique [0002] The application of seismic exploration in energy and mineral exploration has been widely recognized. With the advancement of technology, multi-wave seismic exploration technology has been greatly developed. Multi-wave seismic exploration has the characteristics of carrying rich underground information. However, the mutual interference between different waves reduces the resolution of imaging, which seriously affects the accuracy of geological interpretation. The current separation methods mainly rely on the dynamic characteristics (polarization characteristics) and kinematic characteristics (apparent velocity) of seismic waves to separate the wave field, and currently only shear waves and longitudinal waves can be separat...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/36
CPCG01V1/36G01V1/362G01V1/364G01V2210/322G01V2210/324G01V2210/44G01V2210/46G01V2210/47
Inventor 柴贺军黄河阎宗岭贾学明毛友平张小松徐建强
Owner CHINA MERCHANTS CHONGQING COMM RES & DESIGN INST
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