Deep-sea seismic data acquisition towing cable based on deep-sea robot and acquisition method

Abstract

The invention provides a deep-sea seismic data acquisition towing cable based on a deep-sea robot and an acquisition method. The deep-sea robot is used for towing the array type marine seismic data acquisition towing cable in the deep sea, and single-component or multi-component marine seismic data can be directly acquired in the deep sea. The pull-type or bottom-sinking array type marine seismic data acquisition cable is composed of three-component wave detectors or sensors, piezoelectric crystals or optical fiber sound pressure hydrophones and electronic or optical fiber three-component attitude sensors, wherein the three-component wave detectors or sensors, the piezoelectric crystals or the optical fiber sound pressure hydrophones and the electronic or optical fiber three-component attitude sensors are evenly distributed in the cable. The head end and the tail end of each seismic data acquisition towing cable are respectively towed by a deep-sea robot; the cable is connected with a seismic data acquisition and storage instrument or a modulation and demodulation instrument on the deep-sea robot; and a high-precision chip-level atomic clock in the seismic data acquisition and storage instrument or the modulation and demodulation instrument is used for timing the acquired marine seismic data and carrying out time synchronization and data processing on excitation signals of an underwater controllable air gun seismic source in the later period.

Description

technical field [0001] The invention belongs to the technical field of marine geophysical exploration, and relates to a deep-sea seismic data collection streamer and a collection method based on a deep-sea robot. Background technique [0002] There are three main methods of marine seismic data acquisition at present, one is single-component, two-component, three-component or four-component towed marine seismic data acquisition cable (Streamer) towed at the stern of the acquisition operation ship, marine seismic data acquisition streamer such as ION Various seismic streamers (Streamer) produced and sold by companies such as , Sercel and OYO Geospace. The other is that the three-component or four-component ocean bottom seismic data acquisition cable (OBC) sinks into the seabed, and the other is that the independent three-component or four-component ocean bottom seismic data acquisition stations (OBS and OBN) sink to the bottom, and the independent marine seismic air gun The e...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the difficult problem of the limited long-distance cable data transmission capacity bottleneck of the marine seismic data acquisition cable composed of conventional three-component geophone pressurized electric hydrophones, the marine seismic data acquisition cable that is several kilometers or even tens of kilometers away from the towing operation ship The problem of power supply of numerous data acquisition sub-joints, and the difficulty of preventing the tail ends o

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