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A ground microseismic positioning method and system based on joint focal mechanism inversion

A technology of focal mechanism and positioning method, applied in seismology, seismic measurement, seismic signal processing, etc., can solve the problem of low positioning accuracy of micro-seismic events, achieve the effect of solving the radiation pattern problem, improving accuracy, and avoiding positioning accuracy

Active Publication Date: 2022-06-24
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a ground microseismic positioning method and system combined with focal mechanism inversion for the above-mentioned defects of the prior art, aiming at solving the problem of low positioning accuracy of microseismic events in the prior art

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  • A ground microseismic positioning method and system based on joint focal mechanism inversion
  • A ground microseismic positioning method and system based on joint focal mechanism inversion
  • A ground microseismic positioning method and system based on joint focal mechanism inversion

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[0059] In order to make the objectives, technical solutions and advantages of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0060] see also Figure 1-Figure 8 , the present invention provides some embodiments of a ground microseismic localization method for joint focal mechanism inversion.

[0061] like figure 1As shown, a ground microseismic location method for joint source mechanism inversion of the present invention includes the following steps:

[0062] S100, according to the observation system and the target area, use the P-wave and S-wave velocity models to determine the theoretical travel time table.

[0063] Specifically, the observation system refers to a system for observing earthquakes. T...

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Abstract

The invention discloses a ground microseismic location method and system combined with focal mechanism inversion. The method includes the steps of: determining the theoretical travel time table by using the P wave and S wave velocity models according to the observation system and the target area; obtaining the theoretical travel time table according to the theoretical travel time table The amplitude of the microseismic data track is corrected according to the theoretically predicted polarity before stacking; the source position is determined according to the stacked energy of the polarity corrected amplitude. Because the microseismic location method of the present invention's joint focal mechanism rapid inversion utilizes the waveform information of P waves and S waves in the data, the focal mechanism solution inversion calculation is fast and stable, and can effectively solve the problem of radiation patterns caused by complex focal mechanisms. Improve the accuracy of scanning superposition positioning; and the method of the present invention does not need to manually pick up the first arrival of P wave and S wave, and can automatically detect and locate microseismic events, further avoiding the impact of picking errors on positioning accuracy.

Description

technical field [0001] The invention relates to the technical field of microseismic monitoring, in particular to a ground microseismic positioning method and system for joint source mechanism inversion. Background technique [0002] Microseismic monitoring can be applied to hydraulic fracturing shale gas development, geothermal system development, mining and other engineering technology fields, of which microseismic positioning is the core technology. At present, the traditional method based on seismic phase arrival picking is still one of the most widely used methods for microseismic positioning. The positioning method is often difficult to achieve satisfactory results even if it takes a lot of work to pick it up. In recent years, researchers have developed positioning methods and technologies based on diffraction scan stacking by drawing on the principle of migration imaging in reflection earthquakes, and have begun to apply them to the field of ground-based microseismic ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/00G01V1/28G01V1/34G01V1/36
CPCG01V1/008G01V1/288G01V1/362G01V1/364G01V1/345G01V2210/21G01V2210/53G01V2210/63G01V2210/74G01V2210/65
Inventor 徐锦承张伟李俊伦
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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