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A deep-tow multi-channel seismic streamer attitude determination method and processing terminal

A technique for determining the method and attitude, which is applied in the field of determining the attitude of the deep towing multi-channel seismic streamer and the processing terminal field to achieve the effect of improving the accuracy

Active Publication Date: 2021-06-08
GUANGZHOU MARINE GEOLOGICAL SURVEY
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Problems solved by technology

[0006] The second object of the present invention is to provide a processing terminal, which can solve the problem of determining the attitude of the tow cable

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  • A deep-tow multi-channel seismic streamer attitude determination method and processing terminal
  • A deep-tow multi-channel seismic streamer attitude determination method and processing terminal
  • A deep-tow multi-channel seismic streamer attitude determination method and processing terminal

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Embodiment Construction

[0028] Below, the present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

[0029] Such as Figure 2-Figure 5 As shown, a method for determining the attitude of a deep towed multi-channel seismic streamer includes the following steps:

[0030] Step 1: For each shot set, pick out the direct wave travel time t on each geophone d , sea surface reflected wave travel time t ss and sea bottom reflection travel time t sf , where the travel time of the direct wave of the i-th detector is The travel time of the reflected wave from the sea surface is The sea bottom reflected wave travel time is

[0031] Step 2: Obtain the average velocity v of seismic wave propagation in seawater. The average velocity of seismic waves propagating in seawater can be obtained by analyzing the multi-channel seismic data of the sea surface in the area where the actual exploration and acquisition is performed, which is a prior art and will...

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Abstract

The present invention relates to a method for determining the attitude of a deep towed multi-channel seismic streamer and a processing terminal. The method includes the following steps: Step 1: For each shot set, pick up the direct wave travel time and sea surface on each geophone Reflected wave travel time and submarine reflected wave travel time; Step 2: Obtain the average velocity of seismic wave propagation in seawater; Step 3: Calculate the horizontal distance and height difference of each geophone relative to the source; Step 4: Press the corresponding equation The group solves the three-dimensional coordinates of each geophone to obtain the three-dimensional coordinates of each geophone, which is equivalent to obtaining the attitude of the streamer. The present invention does not require a two-dimensional assumption, and can obtain the three-dimensional space form of the streamer. At the same time, the travel time of the direct wave, sea bottom reflection wave and sea surface reflection wave is used to determine the relative position between the geophone and the seismic source, so as to improve the accuracy of the relative position.

Description

technical field [0001] The invention relates to the technical field of determining the attitude of a streamer in ocean exploration, in particular to a method for determining the attitude of a deep towing multi-channel seismic streamer and a processing terminal. Background technique [0002] Deep towing multi-channel seismic is a technology that deploys the seismic source and streamers at a distance of about 100 meters above the seabed for seabed surveys, such as figure 1 as shown, figure 1 The tow body with the seismic source is located above about 100m (meters) from the bottom of the seabed. The tow body is connected to the tow cable. Several geophones are arranged on the tow cable. The tow cable is in an ideal horizontal and straight state. The tow cable passes through the tow body The cables are connected to a seismic vessel located on the surface of the sea. In the conventional sea surface streamer seismic exploration, because there is a thick water layer between the e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/20G01V1/38
CPCG01V1/201G01V1/3835G01V2210/1423
Inventor 邢涛刘斌文鹏飞温明明
Owner GUANGZHOU MARINE GEOLOGICAL SURVEY
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