High-frequency ocean acoustic guided wave dispersion analysis device and method
An analytical method, marine technology, applied in surveying devices, geophysical surveys, seismology, etc., which can solve problems such as blank states
Active Publication Date: 2021-01-29
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology
At present, the research on the application of ocean acoustic guided wave to shear wave velocity imaging technology in shallow ocean sediments has not yet been carried out, and the entire technical system is in a blank state
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[0018] The specific embodiment of the present invention is described below in conjunction with accompanying drawing:
[0019] Such as figure 1 As shown, a kind of high-frequency ocean acoustic guided wave dispersion analysis method proposed by the present invention comprises the following steps:
[0020] Step 101: Design a marine acoustic guided wave seismic data acquisition system based on the multi-channel hydrophonetic marine seismic detection equipment. According to this system, offshore construction is completed, including multi-channel hydrophone launch, air gun launch, air gun firing, multi-channel hydrophone recovery, and air gun recovery.
[0021] Step 102: Convert the originally collected multi-channel hydrophone data into SU or SEGY format, provide a common shot point gather of a single airgun shot point, and perform channel equalization and band-pass filter processing.
[0022] Step 103: Read the ocean guided wave common shot data of the vertical component, and u...
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The invention discloses a high-frequency ocean acoustic guided wave frequency dispersion analysis device and method, and belongs to the technical field of ocean seismic exploration. The method is implemented by the following steps: firstly, artificial source acoustic guided wave data acquisition is carried out in seawater by using multiple hydrophones; secondly, ocean acoustic guided wave data preprocessing is carried out, including common shot gather extraction, channel equalization, band-pass filtering and the like; then frequency dispersion energy imaging is carried out by using a linear inclined superposition method, and a frequency dispersion curve is extracted from an extreme value of a frequency dispersion spectrum; and finally, a frequency dispersion curve target function is constructed, and frequency dispersion curve inversion is carried out by utilizing a genetic algorithm. The device is realized based on the method. Through the frequency dispersion analysis technology, the shear wave velocity imaging problem of the seabed shallow soft sedimentary layer in marine geological engineering investigation and marine geophysical investigation is solved.
Description
technical field [0001] The invention relates to the technical field of marine seismic exploration, in particular to a high-frequency marine acoustic guided wave dispersion analysis device and method. It is mainly used in marine geological engineering surveys and also in marine geophysical surveys. Background technique [0002] As a core geophysical detection technology, marine seismic detection technology is widely used in marine geological survey, marine energy and resource exploration, marine disaster early warning and evaluation, and marine national defense security. Seismic waves are divided into two types: body-wave and interface-wave according to the propagation characteristics of the wave. The development of marine body wave detection technology is mature, especially the seismic exploration technology of offshore oil and gas resources is becoming more and more mature, but the marine surface wave detection technology also has great potential, but its development is sl...
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IPC IPC(8): G01V1/24G01V1/38G01V1/18G01V1/50
CPCG01V1/186G01V1/242G01V1/3852G01V1/50
Inventor 王元游庆瑜郝天珧胡耀星赵春蕾张妍徐锡强
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI