Vertical measuring line system for marine shallow seismic exploration and application thereof

A technology of seismic exploration and line survey, applied in seismology, geophysical measurement, seismology in areas covered by water, etc., which can solve the problem of limited wave field of geophones, affecting shipping, and difficult location of seismic source and geophone Fixed and other problems to ensure waterproof and reduce erosion

Active Publication Date: 2018-05-11
POWERCHINA HUADONG ENG COPORATION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] ① The layout of the measuring line is large, which affects the shipping
[0005] ② The position of the source and the detector is not easy to fix
[0006] ③ The wave field collected by the geophone is limited
Due to the layout of the measuring line in deep water, there are high requirements for the waterproof and pressure-proof of the equipment, and the existing equipment is difficult to meet this requirement

Method used

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  • Vertical measuring line system for marine shallow seismic exploration and application thereof
  • Vertical measuring line system for marine shallow seismic exploration and application thereof
  • Vertical measuring line system for marine shallow seismic exploration and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0048] A vertical survey line system for offshore shallow seismic exploration, comprising: a mobile airgun source device 200, a fixed three-component geophone 300 and a central control system 5, a mobile airgun source device 200 and a fixed three-component geophone 300 It is arranged on the measurement cable 401 along the vertical direction, and the source excitation control cable 404 and the seismic wave information transmission cable 405 are arranged in the measurement cable 401; the central control system 5 is arranged on the survey ship hull 100 and connected with the measurement cable 401; the mobile The air gun source device 200 slides up and down along the vertical direction on the measuring cable 401, the mobile air gun source device 200 includes an air gun carrier 201, and a plurality of horizontal air guns 202, a plurality of vertical air guns 203 and an air gun combination controller are arranged on the air gun carrier 201 205, a plurality of horizontal air guns 202 ...

Embodiment 2

[0055] An application of a vertical survey line system for offshore shallow seismic exploration, including:

[0056] (1) Conduct surveys on the offshore engineering site, select a suitable detection site as needed, and stop the survey ship;

[0057] (2) Install the mobile air gun source device on the tail of the measuring cable, and make it lean against the supporting plate set under the mobile air gun source device;

[0058] (3) Turn on the electromagnet switch, so that the mobile air gun vibration source device is adsorbed on the supporting plate, and keep the two fixed;

[0059] (4) The central control system controls the measuring cable coil and the sling coil to release the measuring cable and sling, put the measuring cable vertically into the water through the fixed pulley, and calculate the release length of the measuring cable through the speed sensor installed on the measuring cable coil, When the iron pendant set under the pallet is lowered to the deepest position w...

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Abstract

The invention belongs to the technical field of marine seismic exploration and particularly relates to a vertical measuring line system for marine shallow seismic exploration and application thereof.Compared with a conventional observation method for a horizontal measuring line of an ocean surface, the vertical measuring line system provided in the present invention and the application thereof are advantageous in that the system and the application thereof can be well used for realizing imaging of an abnormal body intersecting with a horizontal plane at a large angle; the measuring line mainly extends at a depth direction, only a small area is occupied in a horizontal direction, operation of ships at sea is not affected, and interference caused by ships that come and go is also small; anair gun seismic source consists of a plurality of air guns in different directions; after excitation of the seismic source, seismic waves can be transmitted in multiple directions. Therefore, geological information returned by side and lower interfaces can be well obtained. On this basis, the triggering of the seismic source is excited via adoption of a measurement cable via a wireless mode, waterproofness of the system can be effectively ensured, and erosion of the seismic source by sea water can be greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of marine seismic exploration, and in particular relates to a vertical survey line system and application of marine shallow seismic exploration. Background technique [0002] The offshore area is the earliest and most frequent area for human development and utilization of ocean activities. At present, how to effectively protect, rationally utilize and develop the ocean is a research hotspot all over the world. my country is a big ocean country with rich marine resources, rational development and utilization of marine resources is conducive to the rapid development of our country's economy. In recent years, with the improvement of the development level of marine resources, the scale of my country's marine engineering construction has become larger and larger, the structure has become more and more complex, and the requirements for engineering construction have become more stringent, especially for ports, coa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/38
CPCG01V1/3817G01V1/3843
Inventor 汪明元单治钢孙淼军
Owner POWERCHINA HUADONG ENG COPORATION LTD
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