Multi-node OBS vertical cable earthquake collection system

A technology of acquisition system and vertical cable, applied in the field of multi-node OBS vertical cable seismic acquisition system, can solve the problem of unconventional processing of seismic data, etc.

Active Publication Date: 2016-07-06
GUANGZHOU MARINE GEOLOGICAL SURVEY
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Problems solved by technology

However, the existing OBS equipment is unable to carry out unconventional processing of stereo observation seismic data, modeling and imaging of broadband and wide-angle seismic

Method used

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  • Multi-node OBS vertical cable earthquake collection system
  • Multi-node OBS vertical cable earthquake collection system
  • Multi-node OBS vertical cable earthquake collection system

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Embodiment Construction

[0026] The following further describes the present invention with reference to the accompanying drawings and specific embodiments to facilitate a clearer understanding of the technical ideas claimed by the present invention.

[0027] Such as figure 1 , 2 , 3 shows the multi-node OBS vertical cable seismic acquisition system of the present invention, including a first hydrophone array cable 1, an acquisition station 2, a second hydrophone array cable 3, positioning pontoon 4, floating body 5, acoustic release 6 and The counterweight anchor 7, the first hydrophone array cable 1 and the second hydrophone array cable 3 have a core cross-sectional area of ​​0.2 square millimeters, the inner conductor of the cable uses 19 / 0.16 tinned round copper wire, and the conductor outer diameter is 1.2 mm, the maximum DC resistance of the conductor is less than or equal to 150Ω / km at 20℃, the insulation resistance between the inner core wire of the cable and the core wire and the shielding wire is...

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Abstract

The invention discloses a multi-node OBS vertical cable earthquake collection system. The system comprises a first hydrophone array cable, a collection station, a second hydrophone array cable, a positioning floating drum, a floating body, an acoustic releaser and a counterweight anchor. Auxiliary bearing cables are weaved on the surfaces of the first hydrophone array cable and the second hydrophone array cable. Pressure-resistant hydrophones are uniformly and isometrically distributed on and connected with the first hydrophone array cable and the second hydrophone array cable along the axial direction. The collection is connected with and fixed on the part between the lower end of the auxiliary bearing cable weaved on the surface of the first hydrophone array cable and the upper end of the auxiliary bearing cable weaved on the surface of the second hydrophone array cable. The collection station comprises a main collection station and a slave collection station, is used for exploring seabed earthquakes and natural gas hydrates and is capable of carrying out unconventional processing on stereo observation earthquake data according to the characteristics of hydrate ore bodies such as a seabed diffuse type hydrate ore body, carrying out modeling and imaging on wideband wide-angle earthquake reflection stratums and providing technical support for hydrate identification and reserve prediction.

Description

Technical field [0001] The invention relates to the technical field of marine seismic and natural gas hydrate resource exploration, in particular to a multi-node OBS vertical cable seismic acquisition system. Background technique [0002] With the development and improvement of OBS, or submarine seismograph exploration technology, OBS has very obvious effects in the exploration of submarine gas hydrates. However, the current existing OBS equipment cannot carry out unconventional processing of stereoscopic seismic data, broadband and wide-angle seismic reflection stratigraphic modeling and imaging, and provide technical support for hydrate identification and reserve prediction based on the characteristics of seabed diffusion and other hydrate ore bodies. Therefore, in order to achieve the goal of exploration and test production of submarine gas hydrate resources, and to meet the overall requirements of the project "the subject research provides technical support for the exploratio...

Claims

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Application Information

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IPC IPC(8): G01V1/38
CPCG01V1/3808G01V1/3852
Inventor 伍忠良王伟巍董广赵庆献黄建宇谢城亮
Owner GUANGZHOU MARINE GEOLOGICAL SURVEY
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