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System and method of synchronous acquisition of ocean seismic data

A seismic data and synchronous acquisition technology, applied in seismic signal transmission, seismology in areas covered by water, etc., can solve problems affecting data acquisition, inconsistency of digital packet clock frequency, inconsistency of seismic data acquisition time, etc., to achieve The effect of eliminating cumulative effects

Active Publication Date: 2013-04-24
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the present invention provides a method that can solve the problem that the clock frequency of the digital packet in the distributed marine seismic exploration system is inconsistent and the seismic data acquisition time is inconsistent, which affects the data acquisition.

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  • System and method of synchronous acquisition of ocean seismic data
  • System and method of synchronous acquisition of ocean seismic data
  • System and method of synchronous acquisition of ocean seismic data

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Embodiment Construction

[0054] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, but not to limit the present invention.

[0055]The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0056] In a device embodiment disclosed in the present invention, a system for synchronous acquisition of marine seismic data is provided, such as image 3 shown, including:

[0057] Set in the shipboard console:

[0058] The main clock sending module is used to send the command data embedded in the main clock to the streamer interface board;

[0059] And set on the streamer interface board:

[0060] The main clock recovery module is used to receive the command data embedded in the main clock sent by the shipboard console, and restore the main clock;

[0061...

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Abstract

The invention discloses a system and a method of synchronous acquisition of ocean seismic data, the method of the synchronous acquisition of the ocean seismic data includes: a shipborne control platform sending a main clock to a marine seismic streamer interface board; the marine seismic streamer interface board receiving the main clock and distributing the main clock to all digital packets on the marine seismic streamer in sequence through a command data channel; when the shipborne control platform sends commands to the digital packets on the marine seismic streamer to trigger signals through the marine seismic streamer interface board, and the digital packets delaying clocks in the digital packets according to the delay compensating parameter delta t and enabling the times at which all the digital packets to execute the commands sent by the shipborne control platform to be identical. The problems that clock frequency of the digital packets in a distributed ocean seismic survey system is inconsonant and data acquisition is affected due to the fact that the acquisition times of seismic data are inconsonant are solved.

Description

technical field [0001] The invention relates to a data acquisition technology, in particular to a system and method for synchronous acquisition of marine seismic data. Background technique [0002] The marine seismic exploration system consists of one or more underwater cables, and each cable is composed of deck cables, optical fiber leading sections, working sections, digital packets, and tail targets in series. Among them, the working section is one of the core components of the underwater system, in which a large number of hydrophones (single or combined) are placed at equal intervals to form a sensor array with a huge coverage area. figure 1 It is a typical structure of distributed work segment. In this kind of distributed streamer working section, the acquisition boards are placed in the cable at equal intervals, and each board is responsible for the digital processing of the 4-channel hydrophone signal, and the digitized signal is transmitted to the digital package th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/22G01V1/38
Inventor 曾翔朱耀强阮福明黄龙君
Owner CHINA NAT OFFSHORE OIL CORP
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