Scanning signal calculation method and device
A technology of scanning signals and calculation methods, which is applied in the field of geophysical exploration, can solve the problems of strong interference of seismic data and unfavorable processing of seismic data, and achieves the effect of less frequency overlap, which is beneficial to processing and reduces interference of adjacent shots.
Active Publication Date: 2019-06-11
BC P INC CHINA NAT PETROLEUM CORP +1
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[0005] The same scanning signal is used to simultaneously excite multiple vibrators, and there is frequency overlap between different vibrators, which often makes the acquired seismic data have strong interference from adjacent shots, which is not conducive to the processing of subsequent seismic data.
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[0031] 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 implementations are only some of the implementations of the present application, not all of them. Based on the implementation manners in this application, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.
[0032] An embodiment of the present application provides a scan signal calculation method. see figure 1 . The embodiment of this application may include the following steps.
[0033] Step S11: Divide the designated frequency bands in the work area to obtain a first frequency band set.
[0034] In this embodiment...
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The embodiments of the application disclose a scanning signal computing method and a device. The method comprises the following steps: dividing a specified band of a work area to get a first band set, wherein the first band set includes multiple sequentially adjacent first bands; for each first band in the first band set, edging the first band, and taking the edged first band as a second band in a second band set; determining an edging window function and edging time length corresponding to each second band in the second band set; and for each second band in the second band set, computing the scanning signal corresponding to the second band based on the edging window function and the edging time length corresponding to the second band so as to give the scanning signals corresponding to the second bands in the second band set to multiple vibroseises in the work area and excite the multiple vibroseises in the work area synchronously.
Description
technical field [0001] The present application relates to the technical field of geophysical prospecting, in particular to a scanning signal calculation method and device. Background technique [0002] At present, vibroseis seismic exploration and acquisition technology is the development trend of land seismic exploration and acquisition technology. Compared with explosive vibrator, vibroseis has many advantages such as controllable frequency and energy, safety and environmental protection, low cost, and high construction efficiency, so it is more and more popular in various fields. Sought after by big oil geophysical oil companies. [0003] The vibroseis excitation is to excite a series of single-frequency signals with frequency changes through the seismic source, which are reflected back to the surface and recorded by the geophone, and then the recorded signals are correlated with the theoretical reference signals to obtain seismic data. In the process of using vibroseis ...
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IPC IPC(8): G01V1/02
CPCG01V1/02
Inventor 雷云山唐东磊王建锋潘英杰冯小翠赵君
Owner BC P INC CHINA NAT PETROLEUM CORP