Geological exploration detecting method and device and storage medium

Abstract

The embodiment of the invention discloses a geological exploration detecting method and device and a storage medium. The method is applied to a four-component collecting device including a high-frequency detector for collecting high-frequency component data and a low-frequency detector for collecting low frequency three-component data. The method comprises: step one, acquiring high-frequency component data by the high-frequency detector and acquiring low-frequency three-component data by the low-frequency detector; to be specific, acquiring the high-frequency component data and the low-frequency three-component data based on an excited artificial source and enabling the low-frequency three-component data to contain two horizontal component data and one vertical component data; determiningthe velocity of a surface layer by using the high-frequency component data; acquiring a velocity model characterizing a corresponding relationship between the depth and velocity of the stratum based on the surface layer velocity and the low-frequency three-component data; and determining a velocity profile of the stratum of a testing area based on the velocity model.

Description

technical field [0001] The invention relates to the technical field of seismic exploration, in particular to a geological exploration detection method, device and storage medium. Background technique [0002] At present, the inversion method of seismology using actual observation record data is still mostly used in the study of deep structures, such as the single-point seismic noise imaging method, which usually uses three-component low-frequency geophones to collect data, and then uses the collected data to obtain the measured level The vertical spectral ratio curve (Horizontal-to-Vertical Spectral Ratio, HVSR), and then calculate the formation velocity, but in the calculation process, it relies heavily on the shear wave velocity of the underground surface. However, when using the HVSR single-point noise imaging method, it is difficult to determine the accurate surface shear wave velocity, which is usually a given empirical value, which will lead to relatively large calcula...

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Problems solved by technology

[0002] At present, the inversion method of seismology using actual observation record data is still mostly used in the study of deep structures, such as the single-point seismic noise imaging method, which usually uses three-component low-frequency geophones to collect data, and then uses the collected data to obtain the measured level and the vertical spectral ratio curve (Horizontal-to-Vertical Spectral Ratio, HVSR), and then calculate the formation velocity, but in the calculation process, it relies heavily on the shear wave velocity of the underground surface

When using the HVSR single-point noise imaging method, it is difficult to determine the accurate surface shear wave velocity, which is usually a given empirical value, which will lead to relatively large calculation deviations and unstable calculation results

However, there is currently no effective solution to this problem

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