KR101446065B1 - Source generator for marine seismic exploring - Google Patents

Abstract

The present invention relates to an apparatus for generating a sound source for a marine seismic exploration. An objective of the present invention is to allow an accurate marine exploration by controlling a depth of the apparatus for generating a sound source, and to prevent errors in analyzing and interpreting data due to a direct wave and a secondary wave heading to a sea surface in advance. To achieve the objective, according to an embodiment of the present invention, the apparatus includes: a buoyancy control part having a cylindrical body accommodating sea water and a lid coupled to both end parts of the body in such manner that the lid is detachable from at least one end part to open and close an opening of the end part; and a frame part having a plurality of frames assembled to the body to form a seating unit to be coupled to a transducer. According to the apparatus for generating a sound source for a marine seismic exploration of the present invention, the depth of the apparatus for generating a sound source is controlled to obtain low noise and high resolution seismic wave data through a deeptow scheme such that an accurate marine exploration is performed. In addition, the sound source generated from the apparatus for generating a sound source prevents the direct wave and the secondary reflected wave heading to the sea surface by a sound absorbing pad so that errors in analyzing and interpreting data can be prevented in advance.

Description

TECHNICAL FIELD [0001] The present invention relates to a sound source generator for a marine seismic wave sensing device,

[0001] The present invention relates to a sound source generator for use with a seawater seismic wave probe, and more particularly, to a sound source generator for a seawater seismic wave probe capable of precise ocean exploration by preventing errors in data analysis and analysis.

Exploration of marine seismic waves has been carried out for the purpose of finding resources that are present in the seabed such as oil, natural gas, gas hydrate, bedrock for underwater pipelines and cables, submarine tunnels, seabed storage facilities and bridges. ought.

For the purpose of resource exploration, a large-capacity air gun with a low frequency and a long streamer with a length of several kilometers are used for the purpose of grasping the geological structure at a depth of several kilometers (km).

However, in the case of marine seismic exploration for the purposes of marine construction such as submarine pipelines and cable burials, submarine tunnels, underwater storage facilities, bridges, etc. (usually referred to as 'engineering purpose'), (Single-channel or small-scale multi-channel streamers), such as high-frequency small air guns, sparklers, boomers, and the like.

In addition, for engineering purposes, the exploration area is shallow because the depth of the exploration area is shallow and it is difficult to explore with a large-scale exploration ship. Therefore, most of them are carried out by small vessels and fishing vessels.

The oceanographic seismic data acquisition system consists of a side device, a sound source generator, a sound source receiver, and a recording system.

The marine seismic surveying system uses DGPS (Differential GPS) to measure the position of the ship or all the equipment at the same time the data acquisition is performed

The sound source generating device artificially generates the acoustic wave signal. For engineering purposes, typical examples of the acoustic wave sound source device used in the ocean are an air gun, a sparker, and a boomer.

Generally, the higher the frequency band of the sound generator, the higher the resolution, but not the deep depth.

The sound source receiving apparatus is an apparatus that receives an elastic wave signal artificially generated by the sound source generating apparatus.

The recording system is a device that converts and stores the received signal from analog to digital.

The air gun used for seismic surveys is a device that generates sound waves by rapidly discharging high-pressure air into water, and it is used most often in marine exploration because it has a frequency of several tens Hz.

However, it is not suitable for engineering exploration using a small ship because it requires a lot of accessories such as a compressor capable of generating and supplying high-pressure air continuously, a large-capacity generator, work space and high cost.

The sparker generates a spark after a high voltage current is applied between two electrodes in the water, and when the spark occurs, a vapor bubble is generated and a primary pulse is generated. When the bubbles cool and shrink, a secondary bubble pulse is generated. Since the bubbles have a frequency of 20 to 200 Hz, they are mainly used to investigate the seafloor and shallow depth layers.

The boomer generates energy by instantaneously discharging the voltage, making it well suited for engineering exploration. Such a boomer emits electrical energy to the coil and generates a negative pulse by deformation of the transducer if an eddy current is generated in the transducer (also referred to as a plate) with respect to the coil. Since the boomer has a frequency of 400 Hz to 1300 Hz, it is mainly used for irradiating a shallow surface layer or a shallow depth layer like a sparker. However, since the sparker includes more high frequency components, .

However, the above-mentioned sound source generating devices can not control the position in water, especially the depth of water, and thus there is a problem that accurate ocean exploration is difficult. In addition, there is a problem that an acoustic wave source generated from the transducer generates direct waves and second-order reflected waves directed toward the sea surface, resulting in errors in data analysis and analysis.

KR 10-0660563 B1 KR 10-1039146 B1

It is an object of the present invention to solve the problems derived from the foregoing background art, and it is an object of the present invention to make accurate oceanographic survey by controlling the depth of a sound source generating apparatus, and to analyze and analyze data by direct wave and second- And to provide a sound source generator using a seawater seismic wave detection device.

According to an embodiment of the present invention, there is provided an apparatus for generating a seawater seismic wave sound source having a transducer for generating a sound source used for ocean seismic wave surveys, comprising: a cylindrical body for receiving seawater; A buoyancy regulating unit coupled to the at least one end and detachably coupled to the end to open and close the opening of the end; And a frame part that forms a seating unit in which a plurality of frames are assembled to the body and to which the transducer is coupled.

The transducer may further include a sound absorbing pad disposed between the body and the transducer for absorbing sound waves directed toward the sea surface.

The fixing unit may further include a fixed network coupled to the frame unit to fix the sound absorbing pad on the transducer while being in close contact with the sound absorbing pad.

Preferably, the end portion of the cap is formed in a streamlined shape.

Preferably, the stopper is screwed to the end of the body.

Preferably, a sealing ring is provided on the joint surface between the cap and the body for maintaining airtightness.

Preferably, the apparatus further comprises a plurality of fixing belts surrounding the circumference of the body, and the frame part is connected to the body by the fixing belt.

According to the above-described sound source generating device using the seawater seismic wave sensing device, it is possible to acquire high-resolution seismic data of low noise by controlling the water depth of the sound source generating device by using the Deepthow technique, .

In addition, since the sound source generated by the sound source generator can block direct waves and secondary reflected waves directed toward the sea surface through the sound absorbing pad, it is possible to prevent errors in data analysis and analysis.

FIG. 1 is a schematic view for explaining marine seismic exploration using, for example, a sound source generating apparatus,
2 is a perspective view showing a sound source generating apparatus according to an embodiment of the present invention,
Fig. 3 is a front view of Fig. 2,
Fig. 4 is a sectional view showing a side cross-section of the buoyancy adjusting portion of Fig. 2,
FIG. 5 is a schematic view for explaining, for example, the adjustment of the water depth of the buoyancy regulating portion of FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Brief Description of Drawings FIG. 1 is a block diagram of a computer system according to an embodiment of the present invention; FIG. 2 is a block diagram of a computer system according to an embodiment of the present invention; FIG.

As shown in FIG. 1, the sound source generator 2 for generating a seawater seismic wave according to the present invention generates seismic waves for ocean exploration while being pulled by the ship 1, and the seismic waves reflected on the undersurface are transmitted to a sound source receiver 3) to convert and analyze the signal.

2, the buoyancy regulating unit 20 for deep sea traction and the frame unit 60 for receiving and coupling the transducer 70 are provided.

4, the buoyancy control unit 20 includes a cylindrical body 22 in which seawater is received, and a buoyancy control unit 20, which is coupled to both ends of the body 22, And a stopper (24) coupled to the end portion to open and close the opening of the end portion.

The buoyancy control unit 20 opens the stopper 24 to allow the seawater to flow in and out of the body 22 and to control the amount of seawater contained in the body 22, Likewise, it is possible to adjust the water depth at which the sound source is located.

In this case, it is preferable that the end of the plug 24 is formed in a streamlined shape. Such a streamlined structure minimizes the resistance due to seawater because the resistance caused by the fluid flows along the surface, thereby facilitating deepwater traction of the sound generator .

The stopper 24 is preferably screwed to the end of the body 22 to maintain airtightness between the stopper 24 and the body 22. In the present embodiment, the plug 24 and the body 22 are shown to be coupled in a screw manner, but the present invention is not limited thereto and various coupling methods may be used. 4, a packing ring 23 for maintaining airtightness is provided on the joint surface between the cap 24 and the body 22. [

Next, as shown in FIGS. 2 and 3, the frame portion 60 forms a mounting means by which a plurality of frames are assembled to the body and the transducer 70 is coupled.

Here, the frame portion 60 may be connected to a plurality of fixing belts 30 surrounding the circumference of the body 22. At this time, it is preferable that the belt 30 is rotatably wrapped around the circumference of the body 22. Even if the body 22 is rotated due to external factors such as pulling or waves, So that the frame portion 60 connected to the frame 30 can be held in the underside without being turned upside down.

The frame part 60 can be made of aluminum alloy material to reduce the weight of the product, and it can be configured as a prefabricated structure, so that convenience in transportation and storage can be improved compared with the conventional structure.

It is preferable that a sound absorbing pad 40 is installed between the body 22 and the transducer 70. The sound absorbing pad 40 absorbs the direct wave and the second reflected wave toward the sea surface, And interpretation errors are prevented in advance.

The stationary network 50 may further include a fixing net 50 that is coupled to the frame 60 to fix the sound absorbing pad 40 on the transducer 70 while being in close contact with the sound absorbing pad 40 . The fixed net 50 allows the sound absorbing pad 40 to be more firmly fixed to the transducer 70 and allows the sound absorbing pad 40 to be in close contact with the transducer 70, .

According to the embodiments of the present invention described above, it is possible to acquire low-noise, high-resolution seismic data by controlling the depth of the sound source generator and to use the deep sea depth approach. In addition, since the sound source generated by the sound source generator can block the direct wave and the second-order reflected wave toward the sea level through the sound absorbing pad, errors in data analysis and analysis can be prevented in advance.

The foregoing has outlined rather broadly the features and technical advantages of the present invention in order that the claims of the invention to be described below may be better understood. The embodiments described above are susceptible to various modifications and changes within the technical scope of the present invention by those skilled in the art. These various modifications and changes are also within the scope of the technical idea of the present invention and will be included in the claims of the present invention described below.

1: Ship 2: Sound source generator
3: Sound receiving device
20: Buoyancy control part 22: Body
23: packing ring 24: stopper
30: fixing belt 40: sound absorbing pad
50: fixed network 60: frame part
70: transducer

Claims (7)

delete A sound source generator for a marine elastic wave navigation system having a transducer for generating a sound source used for oceanic seismic wave detection,
A buoyancy regulator including a cylindrical body having seawater accommodated therein and a cap connected to both ends of the body and detachably coupled to at least one end of the cap to open and close the opening of the end;
A frame part forming a seating unit in which a plurality of frames are assembled and connected to the body to couple the transducer; And
A sound absorbing pad provided between the body and the transducer for absorbing a sound wave directed toward the sea surface;
And a sound source for generating the sound source. 3. The method of claim 2,
Further comprising a fixed network coupled to the frame part to fix the sound absorbing pad on the transducer in a state of being closely attached to the sound absorbing pad. 3. The method of claim 2,
Wherein the end of the cap is formed in a streamlined shape. 3. The method of claim 2,
Wherein the stopper is coupled to an end of the body by a screw method. 6. The method of claim 5,
And a packing ring for maintaining airtightness is provided on a joint surface between the cap and the body. A sound source generator for a marine elastic wave navigation system having a transducer for generating a sound source used for oceanic seismic wave detection,
A buoyancy regulator including a cylindrical body having seawater accommodated therein and a cap connected to both ends of the body and detachably coupled to at least one end of the cap to open and close the opening of the end;
A plurality of fixing belts surrounding the circumference of the body; And
A frame part forming a seating unit in which a plurality of frames are assembled and connected to the body by the fixing belt to couple the transducer;
And a sound source for generating the sound source.

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