Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Sea combined controled vibrator short time subsection scanning method

A scanning method and seismic source technology, applied in seismic signal receivers, seismology in areas covered by water, etc., can solve problems such as the difficulty in realizing fixed-point working methods and the inability to directly use marine electromagnetic vibroseis, and achieve The effect of meeting requirements, reducing adverse effects, and improving signal-to-noise ratio

Inactive Publication Date: 2008-08-27
JILIN UNIV
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the fixed-point working method used by marine electromagnetic vibrator is difficult to realize, and linear scanning, joint scanning and code scanning are proposed for land electromagnetic vibrator, which cannot be directly used for marine electromagnetic vibrator at present, so A short-time segmental scanning method for marine electromagnetic vibroseis is proposed

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sea combined controled vibrator short time subsection scanning method
  • Sea combined controled vibrator short time subsection scanning method
  • Sea combined controled vibrator short time subsection scanning method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] Below in conjunction with accompanying drawing and embodiment describe in further detail:

[0020] The short-time segmental scanning method of the combined marine vibrator includes the following sequence and steps:

[0021] a. Three or more vibrator exciters are sealed and distributed equidistantly on the plane formed by the same steel frame, and fixed with bolts to form a vibrator array. The vibrator array is connected to the vibrator controller through cables connect;

[0022] b. Put the vibrator array into the sea, so that the vibrator array is fully coupled with the seawater;

[0023] c. Calculate the source code S(t) according to the target layer. After relevant judgment, if it does not meet the requirements of seismic exploration, the source code S(t) should be recalculated. If it meets the requirements of seismic exploration, send the source code to the vibroseis controller;

[0024] d. Design the code for the corresponding scanning frequency segment, divide th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method of scanning in short time and by sections with a combined sea controllable vibroseis, comprising the following steps of: placing a sealed controllable vibroseis array in the sea to enable vibration exciters of the controllable virboseis to be coupled with the sea water completely; computing source code (S(t)) according to a target zone, dividing a Chirp signal with a set frequency interval into N sections, controlling the frequency sections of scanning signals of the N controllable vibroseises to enable the N controllable vibroseises to complete the scanning of different long frequency sections in short time, performing related processing to reflected signals received by a collecting system and obtaining a seismic profile with a conventional seismic processing software. The method of scanning the sea in a short time and by sections with a combined controllable vibrosei solves the problem of low resolution in sea seismic exploration due to the effect of the seismic exploration carrier, improves the Signal to Noise Ratio so that the effect of the seismic exploration carrier to the seismic exploration is reduced to the most lowest point, realizes the seismic exploration of high resolution at shallow layer of the sea and also solves the problem that only fixed point scanning can be adopted on the prior sea controllable vibrosers and the movement of the seismic exploration carrier affects the resolution of the seismic exploration during the sea seismic exploration.

Description

Technical field: [0001] The invention relates to a scanning method for marine shallow artificial seismic exploration, in particular to marine seismic exploration in which multiple vibrator sources work simultaneously. Background technique: [0002] The marine electromagnetic vibrator is a new type of vibrator developed to overcome the defects of the airgun vibrator and the electric spark source. Since 1967, the organic combination of seismic exploration and sonar technology has been carried out on the marine vibroseis. The electromagnetic marine vibrator uses 2 shocks as a group to complete the scanning of the 6-100Hz frequency range, one of which works in the 6-20Hz frequency band, and the other works in the 20-100Hz frequency band. Within the working frequency range, the output of the maximum exciting force is guaranteed. However, the limitation of this type of seismic source is reflected in its fixed-point working method. It is difficult to make corresponding records aft...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01V1/20G01V1/38
Inventor 陈祖斌林君张林行孙锋
Owner JILIN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com