Seismic wave first arrival picking method and system

A technology of seismic wave and seismic trace, applied in the field of seismic wave first arrival picking method and system, which can solve the problems of noise interference and low accuracy of first arrival picking method, and achieve the effect of improving detection accuracy

Inactive Publication Date: 2018-07-06
GUANGDONG UNIV OF PETROCHEMICAL TECH
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Problems solved by technology

However, the oil exploration environment in my country is not always ideal, and the noise interference is very serious in areas with complex surfaces, which leads to the low accuracy of the existing first-arrival picking methods

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  • Seismic wave first arrival picking method and system
  • Seismic wave first arrival picking method and system
  • Seismic wave first arrival picking method and system

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Embodiment Construction

[0066] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0067] The object of the present invention is to provide a seismic wave first arrival picking method and system that can avoid noise interference and improve the accuracy of first arrival picking.

[0068] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0069] figure...

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Abstract

The invention discloses a seismic wave first arrival picking method and system. The method comprises the steps of obtaining a seismic record sequence of a reference seismic trace containing a first arrival wave to obtain the reference seismic sequence; obtaining a seismic trace to be detected; utilizing a slide window to divide the seismic trace to be detected into multiple seismic record sequences to obtain multiple seismic sequences to be detected; calculating the mutual information amount between each seismic sequence to be detected and the reference earthquake sequence; screening the seismic sequence to be detected corresponding to a maximum value in the mutual information amount to obtain the seismic sequence containing the first arrival; according to the time interval of the seismicsequence containing the first arrival and the reference seismic sequence, calculating the moment containing the first arrival seismic sequence to obtain the seismic wave first interval. By means of the method and system, noise interference can be avoided, and the accuracy of picking the first arrival is improved.

Description

technical field [0001] The invention relates to the field of seismic waves, in particular to a seismic wave first-arrival picking method and system. Background technique [0002] The first arrival is the time when the seismic wave reaches the geophone. Seismic first arrival plays a key role in mineral resource development, earthquake location, and seismic tomography. In oil exploration technology, seismic wave signals can be used to understand geological structures. For example, oil exploration requires the use of artificial seismic signals, and it is particularly important to accurately detect the first arrival moment of seismic waves arriving at the receiver point. [0003] Fundamentally speaking, the first arrival wave of seismic signal contains both seismic signal and noise signal, which is the superposition of the two. The accuracy of first arrival picking is the basic and important link in seismic data processing. Traditional first-arrival picking mainly relies on ma...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30
CPCG01V1/303
Inventor 翟明岳
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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