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Method and device for suppressing adjacent shot interference of seismic data independently and synchronously excited by vibroseis

A technology for seismic data and interference suppression, applied in the field of geophysical exploration, can solve problems such as aliasing and low accuracy of seismic data

Active Publication Date: 2017-02-08
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0003] However, the seismic wavefields generated by the synchronous excitation of the vibroseis during the acquisition of the ISS seismic data by the vibrator will interfere with each other and alias, resulting in low accuracy of the seismic data

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  • Method and device for suppressing adjacent shot interference of seismic data independently and synchronously excited by vibroseis
  • Method and device for suppressing adjacent shot interference of seismic data independently and synchronously excited by vibroseis
  • Method and device for suppressing adjacent shot interference of seismic data independently and synchronously excited by vibroseis

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[0042] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0043] The inventor considers that only the seismic data of the main shot has coherent characteristics in the non-common shot gather seismic data, and the interference of adjacent shots no longer has coherent characteristics. Therefore, the seismic data of the main shot can be predicted, while the adjacent shot The interference is unpredictable and random, so the adjacent shot interference in non-common shot gather seismic data can be effectively eliminated by means of vector median filtering. The inventor proposed a vibroseis-type ISS seismic data adjacent shot interference suppression method in...

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Abstract

The invention discloses an adjacent shot interference suppressing method and device for independent simultaneous sweeping seismic data of seismic vibrators. The adjacent shot interference suppressing method includes that separating non-common shot point gather seismic data from ISS seismic data of the seismic vibrators; carrying out vector median filtering on the separated non-common shot point gather seismic data to obtain non-common shot point gather seismic data performed with adjacent shot interference suppressing; separating common shot point gather seismic data from the non-common shot point gather seismic data performed with the adjacent shot interference suppressing. The adjacent shot interference suppressing method and device for the independent simultaneous sweeping seismic data of the seismic vibrators solve the technical problem of low seismic data precision of the prior art, realize to effectively eliminate the adjacent shot interference in the ISS seismic data and enable the seismic data precision to be improved.

Description

technical field [0001] The invention relates to the technical field of geophysical exploration, in particular to a method and device for suppressing adjacent shot interference of seismic data of independent simultaneous scanning (ISS) seismic data of a vibroseis. Background technique [0002] During the acquisition process of ISS seismic data, multiple groups of vibroseis are operated independently and synchronously excited, and the seismic wavefields generated by synchronous excitation of multiple groups of vibroseis are recorded into a master record through continuous observation. acquired. This method of acquiring seismic data from a vibroseis ISS greatly reduces the amount of seismic data and improves the efficiency of acquiring seismic data. [0003] However, during the acquisition of ISS seismic data with vibrators, the seismic wavefields generated by the synchronous excitation of vibrators will interfere and alias with each other, resulting in low accuracy of seismic...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/36
Inventor 张翊孟汪长辉黄明忠
Owner BC P INC CHINA NAT PETROLEUM CORP
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