Submarine optical fiber four-component seismic instrument system and data acquisition method thereof

Abstract

The invention relates to a submarine optical fiber four-component seismic instrument system and a data acquisition method thereof. Four-component node seismic instruments are connected in series to an armored photoelectric composite cable at certain intervals through a circular cable ring; the armored photoelectric composite cable is connected with a computer; an external close-range wireless transmission module, an external photoelectric conversion module and an external wireless charging module are arranged on the side face of each four-component node seismic instrument in a matched mode, and all the modules are fixed to the armored photoelectric composite cable through functional module sleeves; and the four-component node seismic instruments are connected with the computer through the external close-range wireless transmission modules and carries out communication and data transmission. The system has the advantages of high sensitivity, wide frequency band, good high-frequency response, flat frequency characteristic response, linear phase change and good technical parameter consistency; and since no electronic element is arranged at the front end, the device has the advantages of higher reliability, resistance to high temperature and high voltage, no need of power supply, water resistance, corrosion resistance, capability of being arranged for a long time, electromagnetic interference resistance and small channel cross-talk.

Description

technical field [0001] The invention belongs to the technical field of geophysical exploration, and relates to a submarine optical fiber four-component seismic instrument system and a data acquisition method thereof. Background technique [0002] Marine seismic surveying is a method of conducting seismic surveys on the ocean using survey ships. The principles, instruments used, and data processing methods of marine seismic exploration are basically the same as those of land seismic exploration. Because a large amount of oil and natural gas are found in the continental shelf area, marine seismic exploration has a very broad prospect. Marine seismic prospecting is a survey method for artificial earthquakes in seawater, which has four characteristics: ① most of them use non-explosive sources; cable); ③Continuous record of navigation; ④The data is processed by computer, with high work efficiency. Due to the above characteristics, the production efficiency of marine seismic ex...

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Problems solved by technology

[0011] In view of the problems existing in existing submarine node seismic instruments, the present invention provides a submarine optical fiber four-component seismic instrument system and its data acquisition method, which overcomes the low sensitivity, small dynamic range, and limited signal frequency band of conventional electronic detectors and piezoelectric hydrophones , high power consumption, and the node seismic instruments that are currently put in and recovered with ropes or steel wire ropes cannot perform real-time communication and data transmission, and also overcome the inability of the existing technology to understand the working status of the submarine node seismic instruments during operation and to perform data collection. Defects monitored and assessed in real time

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