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Earthquake first-motion wave automatic pickup method and device, medium and electronic equipment

An automatic picking and seismic waveform technology, applied in seismology, measuring devices, seismic signal processing, etc., can solve the problems of slow picking speed, difficult implementation, and impact on picking accuracy, and achieve the effect of fast picking speed and high accuracy

Pending Publication Date: 2022-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many methods for automatic first-arrival picking, but due to factors such as low signal-to-noise ratio of seismic signals, inconspicuous first-movement, and similar frequency between noise and seismic signal, the effect of automatic first-arrival picking is usually not good. ideal
[0003] Among the existing identification technologies, the time window energy ratio method and the time window amplitude ratio method are highly efficient, but the length of the time window has a great impact on the picking accuracy; the neural network and fractal dimension picking methods are complex and difficult to implement. Difficult, and the picking speed is slow; the comprehensive analysis method is currently a method with high accuracy and good consistency, but it is usually time-consuming

Method used

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  • Earthquake first-motion wave automatic pickup method and device, medium and electronic equipment
  • Earthquake first-motion wave automatic pickup method and device, medium and electronic equipment
  • Earthquake first-motion wave automatic pickup method and device, medium and electronic equipment

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Effect test

Embodiment 1

[0076] figure 1 A flow chart of a method for automatically picking up seismic first arrivals based on topological data analysis according to an embodiment of the present invention is shown.

[0077] Such as figure 1As shown, the method of automatic first-arrival wave picking based on topological data analysis includes:

[0078] Step 1: Obtain seismic waveform data and time series;

[0079] Step 2: Based on the seismic waveform data and time series, obtain the time range of the first arrival of the earthquake in the time series;

[0080] Among them, based on the seismic waveform data and time series, obtaining the range of the first arrival wave in the time series includes: dividing the time series into multiple time windows; for each time point in the time series, calculating the time point by energy ratio The energy ratio of the seismic data of multiple time windows in the back and the seismic data of all the previous time windows at the time point; when the energy ratio i...

Embodiment 2

[0091] figure 2 A block diagram of a device for automatically picking up seismic first arrivals based on topological data analysis according to an embodiment of the present invention is shown.

[0092] Such as figure 2 As shown, the automatic first-arrival wave picking device based on topological data analysis includes:

[0093] Data acquisition module 102, acquires seismic waveform data and time series;

[0094] Seismic first wave range determining module 104, based on seismic waveform data and time series, obtains the time range of earthquake first wave in time series;

[0095] Persistence relationship diagram acquisition module 106, which performs topological data analysis on the time series in the time range to obtain the persistence relationship diagram;

[0096] The seismic first arrival position determination module 108 obtains the first seismic arrival position based on the persistence relationship graph.

[0097] Among them, based on the seismic waveform data an...

Embodiment 3

[0106] The present disclosure provides an electronic device comprising: a memory storing executable instructions; a processor running the executable instructions in the memory to implement the above-mentioned method for automatically picking up earthquake first arrival waves based on topological data analysis .

[0107] An electronic device according to an embodiment of the present disclosure includes a memory and a processor.

[0108] The memory is used to store non-transitory computer readable instructions. Specifically, the memory may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory (cache). The non-volatile memory may include, for example, a read-only memory (ROM), a hard disk, a flash memory, and the like.

[0109] The processor may be a central processing unit ...

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Abstract

The invention discloses a seismic first-motion wave automatic pickup method and device, a medium and electronic equipment. The method comprises the following steps: acquiring seismic waveform data and a time sequence; based on the seismic waveform data and the time sequence, obtaining a time range of the seismic first-motion wave in the time sequence; carrying out topological data analysis on the time sequence in the time range to obtain a persistence relation graph; and obtaining the position of the seismic first arrival wave based on the persistence relation graph. According to the seismic first-motion wave automatic pickup method based on topological data analysis, the approximate position of a first-motion wave is calculated and judged, then a seismic waveform which is pre-judged to generate the first-motion wave is converted into a point cloud time sequence, a persistence relation graph of the point cloud time sequence is obtained, the position of the seismic first-motion wave is determined according to the persistence relation graph, and the seismic first-motion wave is picked up. A topological data analysis method is used for identifying the seismic first-motion waves, the pickup speed is high, and the accuracy is high.

Description

technical field [0001] The invention belongs to the field of seismic signal processing, and in particular relates to a method, device, medium and electronic equipment for automatically picking up first-arrival waves of an earthquake based on topological data analysis. Background technique [0002] Arrival time picking in seismology research is a basic and critical link, and its picking speed and accuracy directly affect its application in precise earthquake location, seismic phase identification, focal mechanism and rupture process, seismic exploration, and seismic tomography efficiency and precision. At present, there are many methods for automatic first-arrival picking, but due to factors such as low signal-to-noise ratio of seismic signals, inconspicuous first-movement, and similar frequency between noise and seismic signal, the effect of automatic first-arrival picking is usually not good. ideal. [0003] Among the existing identification technologies, the time window ...

Claims

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Application Information

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IPC IPC(8): G01V1/30
CPCG01V1/305G01V2210/6222
Inventor 孟黎歌
Owner CHINA PETROLEUM & CHEM CORP
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