A method and device for separating aliasing data based on sparse inversion

A technology of data separation and sparse inversion, which is used in measurement devices, seismology, instruments, etc., can solve the problems of non-sparse representation, high computational cost, signal damage, etc., to speed up the convergence speed, improve the computational efficiency, and improve the degree of sparsity. Effect

CN108107474BActive Publication Date: 2019-11-08BC P INC CHINA NAT PETROLEUM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-11-08

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Abstract

The invention provides a method and a device for separating aliasing data based on sparse inversion. The method comprises the following steps: splitting aliasing seismic data to obtain 3D common-geophone gather data; constructing a threshold contraction function according to the 3D common-geophone gather data, wherein the threshold contraction function includes the relation between the number of iterations and the amplitude range of the seismic data; constructing a sparse constrained objective function according to the aliasing seismic data, wherein the sparse constrained objective function includes the function relation between the aliasing seismic data and effective signal data; and using a constructed 3D sliding space-time window to iteratively invert and solve the sparse constrained objective function according to the threshold contraction function to obtain signal-noise separation data of the aliasing seismic data. By using the embodiments of the application, the separation effectof seismic data is improved, and the efficiency of data processing is improved.
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Description

technical field

[0001] The application belongs to the technical field of seismic data processing, and in particular relates to a method and device for separating aliasing data based on sparse inversion. Background technique

[0002] Due to the low efficiency and high cost of traditional seismic acquisition methods, they cannot meet the industrial needs of high-density seismic data acquisition. In the existing technology, aliasing acquisition technology can be used to improve the daily efficiency of seismic acquisition and reduce the cost of high-density seismic acquisition. However, since the aliasing acquisition technology adopts the continuous excitation method, there are a large amount of adjacent shot interference noise in the aliasing acquisition data, which seriously reduces the signal-to-noise ratio and imaging quality of seismic data. Therefore, the signal-to-noise separation of aliased data is a necessary link in the processing of aliased collected data.

[0003] I...

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Embodiment Construction

[0059] 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 scope of protection of this application.

[0060] Acquisition of seismic data is the basis of seismic exploration. In order to improve the efficiency of seismic data acquisition, aliasing acquisition technology can usually be used, that is, different seismic sources can be used to excite at the same time, and corresponding different geophones can receive seismic signals generated b...