Complete multi-wave suppression method based on wavelet domain frequency division energy compensation
An energy compensation and multiple wave technology, which is applied in seismic signal processing and other directions, can solve the problems of predicting multiple wave energy damage and low matching accuracy, so as to compensate for and predict multiple wave energy damage, realize fast and effective suppression, and be easy to use and promotional value effects
Active Publication Date: 2019-05-10
JILIN UNIV
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Problems solved by technology
[0007] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art, to provide a complete multiple wave suppression method based on wavelet domain frequency division energy compensation, which solves the problem of predicting multiple waves caused by multi-channel convolution in the process of predicting multiple waves. Wave energy damage, and the problem of low matching accuracy of the traditional least square matching subtraction method
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[0046] The embodiment of the present application provides a complete multiple wave suppression method based on frequency division energy compensation in the wavelet domain.
[0047] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.
[0048] Following each embodiment is only for illustrating the present invention, and the present invention selects db10 wavelet as wavelet basis function for use, and e...
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The invention relates to a complete multi-wave suppression method based on wavelet domain frequency division energy compensation, comprising the following steps: determining a wavelet matching coefficient according to the seismic record and predicted multi-wave data, performing wavelet matching, and preliminarily correcting the amplitude and phase of the predicted multi-wave; selecting a wavelet basis function, performing wavelet domain frequency decomposition under the same parameter on the predicted multi-wave and seismic record after the wavelet matching to obtain the data of ith frequencyband corresponding to each other; determining a frequency band of the energy compensation according to the characteristics of the multiple-wave data and seismic record of different frequency bands, and performing the spectrum whitening process in the frequency domain; determining the amplitude matching window and the matching coefficient, and performing accurate amplitude matching; performing datareconstruction on the result of the amplitude matching; and subtracting the matched predicted multiple-wave data from the original seismic record according to the principle of least squares to obtaina suppressed result. The invention, based on the complete multi-wave suppression method of the wavelet domain frequency division energy compensation, can effectively suppress multi-wave.
Description
technical field [0001] The present invention relates to the technical field of processing and interpretation of geophysical exploration seismic data, in particular to a complete multiple wave suppression method in the process of seismic data processing, in particular to a complete multiple wave suppression method based on wavelet domain frequency division energy compensation . Background technique [0002] In order to locate and obtain the oil and gas resources stored in the ground, the imaging study of the underground geological structure is a very necessary process. Usually, in seismic exploration, the seismic source is placed near the surface, and the geophone is buried at a certain depth below the ground to receive the reflected wave field information from the underground. The purpose of seismic imaging is to reversely homing the reflected wave information from the complex underground structure, so that it returns to the generated underground reflection point, so that t...
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IPC IPC(8): G01V1/36
Inventor 孙婧王德利王铁兴
Owner JILIN UNIV