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Combined seabed seismic acquisition node

A collection node and combined technology, applied in the field of marine exploration, can solve the problems that the application of precision cannot meet the requirements of offshore oil and gas resource exploration, etc., achieve the effect of high signal-to-noise ratio of seismic signals, avoid detection errors, and improve accuracy

Pending Publication Date: 2020-07-10
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing domestic sinking and floating OBS is far from meeting the requirements of offshore oil and gas resource exploration in terms of accuracy and application, and it is urgent to develop a high-precision combined submarine seismic acquisition node

Method used

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  • Combined seabed seismic acquisition node
  • Combined seabed seismic acquisition node
  • Combined seabed seismic acquisition node

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Embodiment Construction

[0021] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0022] Such as Figure 1-Figure 4 As shown, the embodiment of the present invention provides a combined submarine seismic acquisition node, including an externally threaded anchor 1, an internal anchor 2 installed in the externally threaded anchor 1, the diameter of the internal anchor 2 is slightly smaller than the external thread The diameter of the anchor rod 1, the inner anchor rod is fixedly connected with the outer threaded anchor rod 1 through threads, and the inner anchor rod 2 is provided...

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Abstract

The invention discloses a combined seabed seismic acquisition node which comprises an outer thread anchor rod, and an inner anchor rod which is installed in the outer thread anchor rod. The diameter of the inner anchor rod is slightly smaller than that of the outer threaded anchor rod, a plurality of pressure-resistant cabin mounting grooves are formed in the inner anchor rod in the circumferential direction, a pressure-resistant cabin is mounted in each pressure-resistant cabin mounting groove through an electric telescopic rod, and a plurality of detection holes matched with the pressure-resistant cabins are formed in the outer threaded anchor rod. A seismic parameter acquisition node with a GPS positioning module is arranged in each pressure-resistant cabin; each seismic parameter acquisition node is internally provided with a three-dimensional attitude sensor, a geophone, an electric signal adjustment module, an anti-aliasing filter, a zero-crossing comparator, a coupled frequencymultiplication delay phase-locked loop circuit, an A / D conversion circuit, a CPLD, a DSP controller and a network communication module. The combined seabed seismic acquisition node has relatively highaccuracy.

Description

technical field [0001] The invention relates to the field of marine exploration, in particular to a combined submarine seismic acquisition node. Background technique [0002] At present, there are mainly two types of submarine seismic data acquisition: submarine cable (OBC) acquisition and submarine node (OBN) acquisition. Compared with the former, the submarine node seismic system has higher flexibility, and the system deployment and recovery are more convenient. The seismic observation method of the submarine node is to place the seismometer directly on the seabed through the underwater robot. The seismometer is powered by its own battery, and the source ship alone undertakes the source excitation task. After the source ship completes the excitation of all source points, the underwater robot retrieves the seabed seismometer, downloads the data and processes and interprets it. [0003] The existing domestic sinking and floating OBS is far from meeting the requirements of ...

Claims

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Application Information

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IPC IPC(8): G01V1/38G01V13/00
CPCG01V1/3852G01V13/00G01V2210/1427
Inventor 张敏李振春刘强刘思远李可欣
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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