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A method and system for locating seismic source

A positioning method and positioning system technology, applied in seismology, seismic signal processing, instruments, etc., can solve problems such as low resolution, and achieve the effect of improving resolution, reducing labor costs, and reducing overall costs

Active Publication Date: 2021-08-13
UNIV OF SCI & TECH OF CHINA
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

This type of method usually needs to first set up multiple stations to pick up seismic waves, then correct the waveform according to the travel time difference of seismic waves picked up by different stations, and finally locate the source according to different imaging conditions, but the positioning method based on offset still exists in the prior art low resolution issues

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  • A method and system for locating seismic source
  • A method and system for locating seismic source
  • A method and system for locating seismic source

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Embodiment Construction

[0049] As mentioned in the background technology, the traditional seismic source location method requires a lot of manpower and time to manually pick up the P-wave and S-wave arrival times in the seismic waves, so it cannot be located in real time, and cannot adapt to the trend of increasing data volume. On the other hand, the signal-to-noise ratio of microseismic events is low, and it is difficult to pick up the time accurately, which affects the positioning accuracy. In view of this situation, the positioning method based on offset came into being. This type of method does not need to manually pick up the arrival time information in advance, but uses the travel time difference of different stations to correct the waveform and then locates the source according to different imaging conditions. The maximum point calculated according to the imaging conditions is the source position. Compared with the traditional travel time positioning method, the migration earthquake positionin...

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Abstract

The present application discloses a seismic source positioning method and a positioning system, wherein the seismic source positioning method detects the waveform sequence of seismic waves through a station during the seismic source positioning process, and does not need to manually pick up the seismic wave travel time, which reduces the cost of the seismic source positioning method. labor cost, thereby reducing the overall cost of the positioning method of the seismic source; in addition, the positioning method of the seismic source has adopted a brand-new grouping imaging condition, and this grouping imaging condition changes the addition in the traditional imaging condition into a grouping multiplication, And add the distance, quality factor control to improve the imaging quality of each group, so that the positioning method of the seismic source can effectively image the seismic source in space and time, improve the resolution of the positioning method of the seismic source, and help to calculate the volume of the reservoir , to study fracture distribution and evaluate fracturing effects.

Description

technical field [0001] The present application relates to the technical field of seismic source detection, and more specifically, relates to a seismic source positioning method and positioning system. Background technique [0002] Microseismic (Mine Tremor or Micro Seismic) is a small earthquake, mostly induced by the mining process of underground resources, and can be defined as those seismic events caused by rock failure due to stress field changes in the rock mass near the mining tunnel. [0003] At present, microseismic detection is widely used in the exploitation of unconventional oil and gas fields and the development of geothermal resources. In these processes, the location of microseismic events can be used to characterize fault distribution, estimate reservoir volume, guide downstream fracturing, and identify active faults. Therefore, the detection and location of microseismic events is a very important link in microseismic monitoring. [0004] The traditional ear...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28G01V1/30
CPCG01V1/28G01V1/282G01V1/30
Inventor 缪思钰张海江巫芙蓉
Owner UNIV OF SCI & TECH OF CHINA