Ocean bottom seismograph arrival time difference positioning device and method

Abstract

The invention discloses an ocean bottom seismograph arrival time difference positioning device and method, and belongs to the technical field of ocean seismic exploration. The method comprises the following steps: completing submarine seismograph putting according to a predetermined operation point location, and taking artificial seismic source data as input data; firstly, completing preprocessingof artificial excitation source data of the ocean bottom seismograph; taking the putting point as a center, selecting an appropriate radius to define a search grid range, and constructing a search grid point arrival time difference model according to known submarine topographic data and actually measured seawater wave velocity profile joint calculation ray tracing theoretical arrival time; and calculating the actually measured arrival time difference of the seismometer or hydrophone component by using a cross-correlation algorithm; and superposing the theoretical arrival time difference and the actually measured arrival time difference of the search grid node, and superposing to a point position corresponding to the minimum value of the arrival time difference to obtain a positioning result. Meanwhile, the invention discloses an ocean bottom seismograph arrival time difference positioning device. According to the invention, high-precision correction of the landing position of the ocean bottom seismograph can be realized.

Description

technical field [0001] The invention relates to the technical field of marine seismic exploration, in particular to a seabed seismograph arrival time difference positioning device and method. Background technique [0002] Marine seismology methods are widely used in the development of marine energy resources, the study of submarine geological structures, and early warning of marine disasters. Ocean Bottom Seismometer (OBS) is a new type of marine seismic exploration equipment deployed on the seabed to record seismic waves. The submarine seismograph involves advanced technologies such as marine acoustics, submarine energy supply, high-precision timing without GPS, self-leveling of the seismometer, and low-power acquisition. It is a high-tech marine seismic detection product, mainly used for marine oil and gas resource detection, Geological structure research and disaster prevention and mitigation have become a key equipment for marine geophysical exploration, and a new brigh...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for correcting the bottoming position of the submarine seismograph based on the time difference model learning, which solves the problem of obtaining the bottoming position of the submarine seismograph, and solves the problem of no manual intervention and the introduction of additional errors through quantifiable calculation technology , realize the automatic and high-precision repositioning of the bottom position of the submarine seismograph, which will greatly improve the relocation efficiency of the submarine seismograph, provide the possibility for the rapid positioning of the submarine seismograph on site, and provide the basis for the correct application of subsequent submarine seismograph data

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