Method for receiving and processing seismic signals

A seismic signal and signal technology, applied in seismic signal processing, seismic signal receivers, etc., to achieve the effect of large dynamic range, improved capability, and wide frequency band

Inactive Publication Date: 2011-09-28
BEIJING SANDIEXI GASOLINEEUM EXPLORATION TECHDEV
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  • Abstract
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  • Claims
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Problems solved by technology

[0021] The purpose of the present invention is to provide a seismic signal receiving and

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  • Method for receiving and processing seismic signals
  • Method for receiving and processing seismic signals
  • Method for receiving and processing seismic signals

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Embodiment Construction

[0043] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0044] figure 1 It shows the method flow of seismic signal receiving and processing thereof provided by the present invention, such as figure 1 Shown:

[0045] Step S101, setting multiple geophones with different frequency characteristics at the same seismic measurement point, using the multiple geophones to simultaneously receive seismic signals, and obtaining multiple seismic recording signals with different frequency characteristics.

[0046] Wherein, the plurality of detectors may include detectors with three natural frequencies of low, middle and high, or may be composed of detector cores with three natural frequencies of low, middle and high.

[0...

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Abstract

The invention discloses a method for receiving and processing seismic signals, which comprises the following steps: setting a plurality of detectors with different frequency characteristics at a same seismic surveying point, and simultaneously receiving seismic signals by using the detectors so as to obtain a plurality of seismic recording signals with different frequency characteristics; eliminating the time difference and phase difference between the seismic signals so as to obtain synchronous seismic recording signals; and after respectively carrying out frequency-domain weighting processing on the synchronous seismic signals, carrying out superposed synthesis processing on the synchronous seismic signals so as to obtain seismic recording signals with ideal low frequency response, intermediate frequency response and high frequency response. In the invention, through simultaneously receiving the seismic signals of a same surveying point by using the detectors with different frequency characteristics, then sequentially carrying out frequency-domain weighting and superposition on the received seismic signals, the obtained synthetic seismic signal is large in dynamic range, wide infrequency band and high in sensitivity, and has ideal low frequency response, intermediate frequency response and high frequency response, and the capacity of the signal for identifying underground thin layers can be improved.

Description

technical field [0001] The invention relates to a technique for synchronously receiving seismic signals and synthesizing data of geophones with different frequency characteristics, in particular to a seismic signal receiving and processing method. Background technique [0002] Seismic exploration is to use artificial methods to generate seismic waves, and then use seismometers to receive seismic reflection signals from underground or below the seabed, and obtain underground structure images and geological information after computer processing, providing important information for oil, coal, and natural gas exploration and development. A technique for reference. [0003] In seismic exploration, the seismic waves generated by artificial methods are broadband seismic signals, which will be absorbed and attenuated by the formation during the underground propagation process. Due to the different degrees of absorption of low-frequency signals and high-frequency signals by the eart...

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Application Information

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IPC IPC(8): G01V1/16G01V1/28
Inventor 于承业周雅卿于浩忙
Owner BEIJING SANDIEXI GASOLINEEUM EXPLORATION TECHDEV
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