Surface wave exploration method for jointly extracting Rayleigh wave frequency dispersion characteristics in seismic wave field

A combined extraction and dispersion technology, applied in the fields of geophysical exploration and geology, can solve the problems of low precision of high-order mode dispersion imaging, and achieve the effect of improving precision and stability and reducing multi-solution.

Active Publication Date: 2020-06-16
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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[0005] The technical problem to be solved by the present invention is to provide a surface wave exploration method for extracting Rayleigh wave dispersion char

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  • Surface wave exploration method for jointly extracting Rayleigh wave frequency dispersion characteristics in seismic wave field
  • Surface wave exploration method for jointly extracting Rayleigh wave frequency dispersion characteristics in seismic wave field
  • Surface wave exploration method for jointly extracting Rayleigh wave frequency dispersion characteristics in seismic wave field

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[0051] In order to make the object, technical solution and advantages of the present invention more clear and definite, 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 here are only used to explain the present invention, not to limit the present invention.

[0052] Please also see Figure 1-Figure 9, the present invention provides some embodiments of a surface wave prospecting method for extracting Rayleigh wave dispersion features jointly with seismoelectric wave fields.

[0053] The seismoelectric effect was first discovered by the former Soviet scientist Ivanov in 1939. In the absence of voltage, the electric field caused by seismic waves was measured, and he pointed out that this may be related to the electrokinetic effect of the electric double layer. Afterwards, Frenkel established the wave theory of porous media that coupled solid ph...

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Abstract

The invention discloses a surface wave exploration method for jointly extracting Rayleigh wave frequency dispersion characteristics in a seismic wave field. The surface wave exploration method comprises the following steps of: acquiring jointly acquired data, wherein the jointly acquired data comprises seismic wave data and electric field data; carrying out joint imaging processing on the jointlyacquired data to obtain a superimposed frequency dispersion spectrum; and carrying out extraction processing on the superimposed frequency dispersion spectrum to obtain a frequency dispersion curve, and outperforming inversion processing on the frequency dispersion curve to obtain a stratum structure profile. As the seismic wave data and the electric field data are adopted to carry out combined imaging processing to obtain the superimposed frequency dispersion spectrum, and the multi-mode frequency dispersion curve is extracted, the multiplicity of solutions of inversion is greatly reduced during inversion, and the precision and stability of surface wave exploration are greatly improved.

Description

technical field [0001] The invention relates to the technical field of geological and geophysical exploration, in particular to a surface wave exploration method for extracting Rayleigh wave dispersion characteristics in combination with a seismoelectric wave field. Background technique [0002] Rayleigh wave was first theoretically determined by British scientist Lord Rayleigh in 1887, hence the name. Since the 1950s, with the deepening of research by scientists, it has been found that Rayleigh waves carry medium information such as P-wave velocity, S-wave velocity, and density of each layer of medium when propagating in layered media, showing obvious The dispersion characteristics of (that is, the velocity varies with frequency), and mainly depend on the S-wave velocity structure of the layered medium. Therefore, the energy and velocity change characteristics of Rayleigh waves during the propagation process carry a large amount of formation information. Therefore, in the ...

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Application Information

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IPC IPC(8): G01V1/28G01V1/30G01V3/12
CPCG01V1/282G01V1/288G01V1/303G01V1/307G01V3/12
Inventor 任恒鑫杨振涛陈晓非袁士川郑旭桢何展翔
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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