KR20180023514A - 3-D seismic survey system type Small Ship using Beacon - Google Patents

Abstract

The present invention relates to a three-dimensional seismic survey system for a small vessel using a beacon, and more particularly, to a three-dimensional seismic survey system for a small vessel using a beacon, which is capable of surveying an area having the relatively deep depth of water or an area where the deep depth survey is possible, but also surveying coastal water having a lot of islands and a complex coastline, and at the same time correcting the position of seismic survey data by using a beacon so as to eliminate errors, and including at least two multi-channel receivers, thereby providing an effect of extending the survey area and improving a resolution.

Description

(3-D seismic survey system type Small Ship using Beacon)

The present invention relates to a three-dimensional seismic exploration system for a small ship using a beacon, and more particularly, to a system capable of exploring not only a relatively deep region or a deep depth exploration region, but also a coastal area having many islands and coastal lines. , A beacon is used to remove the error by correcting the position of the seismic survey data, and at least two or more multi-channel receivers are configured to provide a three-dimensional seismic wave ≪ / RTI >

In general, underground structures such as seabed are surveyed by locating a streamer with built-in seismic generator and airgun, such as air gun or sparker, at the rear end of the probe and then navigating, transmitting the seismic waves to the seabed, And by the elastic plate exploration exploring the subterranean underground structure.

In order to perform the above-mentioned seismic wave surveying, it is necessary to provide an OBC (Ocean Bottom Cable type) streamer of Korean Patent Laid-Open No. 10-2012-0076952, Korean Patent Laid-open No. 10-2013-0134822 with a wing, a protective case, Streamer and a multi-wave seismic wave exploration device of Korean Patent No. 10-1016014, and a technique of converting the Acquired Acoustic Wave Acquisition Data of Korean Patent No. 10-1230040 into an ODCE file is applied.

Seismic surveys using the above-described devices can be classified into two-dimensional and three-dimensional surveys depending on whether one or more lines of streamers are used. The above-described two-dimensional exploration obtains information about the cross-section vertically cut in the underground structure, while the three-dimensional exploration allows the three-dimensional cube to be obtained by imaging the underground structure in three dimensions.

Considering that the actual underground structure is three-dimensional, 3D exploration has the advantage of realizing real structure as compared with 2D exploration.

However, since two or more streamers have to be installed and operated, 3D exploration has been limited to large vessels such as oil explorers.

As an example of a large-sized ship, three-dimensional seismic exploration using a petroleum explorer launches a streamer of more than 2 lines and a few kilometers, so that the streamer travels the probe. Even if the streamer meets a bird, the tension of the streamer causes the straight- Can be grasped using several GPSs.

However, in the case of a three-dimensional seismic survey using a small ship, it is not the case when a relatively long streamer of about 100 m is used, but when a three-dimensional survey data is acquired with a short streamer of about 10 m, tension is not generated It is difficult to keep the mutual position constant if algae are present.

In addition, in the case where the speed of the ship is increased or the area around the shoreline is fast, it is important to maintain the interval. However, if the above problem occurs, the interval can not be maintained.

Therefore, it is necessary to use a technique capable of maintaining the gap regardless of the speed of the ship, even in a low water depth region.

Korean Patent Publication No. 10-2012-0076952 Korean Patent No. 10-1016014

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide an apparatus and method for exploring in deep coastal waters, And to provide a three-dimensional seismic exploration system for a small ship.

It is another object of the present invention to provide an apparatus and method that can be utilized even in a low water depth region and maintain a gap between multi-channel receivers irrespective of the speed of a ship.

It is another object of the present invention to provide a method for expanding a survey area and improving a resolution by removing errors by correcting the position of seismic waves using beacons and constructing at least two or more multi-channel receivers.

According to an aspect of the present invention, there is provided a small-sized three-dimensional seismic wave exploration system using a beacon according to an embodiment of the present invention,

A horizontal water receiver 100 formed at the rear of the small vessel 50 in a horizontal direction;

An acoustic wave generating unit 200 installed at a central portion of the horizontal water receiving unit;

A multi-channel receiver 300 having at least two or more reception sensors 350 installed at predetermined intervals in the horizontal receiver,

A beacon (400) installed in an end of the at least two or more multi-channel receiving units (300) and an acoustic wave generating unit to provide beacon information to a marine terminal installed in a ship;

The elastic wave generating unit is operated to generate seismic waves and then the positional information of the ship is corrected using the elastic wave trace information including the GPS position information, the acquisition time and the ground information, and the beacon information provided from the beacon, And the marine terminal 500 for updating and storing the elastic wave trace information by reprocessing.

In addition, the marine terminal 500 may include:

Before performing the seismic wave survey, the position of the GPS in the ship, the relative position information between the GPS, the elastic wave generating unit and the horizontal receiving unit 100 in which the multi-channel receiving unit is installed, the elastic wave generating unit and the multi- An equipment arrangement design information database 510 for storing information on the number of receiving sensors (channels) in the multi-channel receiving unit,

An elastic wave generating and delivering unit 520 for transmitting an elastic wave generating signal to the elastic wave generating unit,

An elastic wave trace information extracting unit 530 for extracting positional information and acquisition time information in the header of the elastic wave trace information including the ground layer information received from the multi-channel receivers and storing the information in the header, and storing the information in the elastic wave trace information database;

An elastic wave trace information divider 540 storing the elastic wave trace information extracted by the elastic wave trace information extracting unit,

A position information correcting unit 550 for correcting the position information of the ship by calculating the relative position change value of the beacon and the GPS in real time using the beacon information provided from the beacon and the elastic wave trace information stored in the elastic wave trace information database,

And a correction position information updating unit 560 for updating the position information of the GPS stored in the elastic wave trace information database to update the elastic wave trace information, thereby achieving the effect of the present invention.

A three-dimensional seismic exploration system for a small ship using a beacon according to the present invention is a system for three-dimensional seismic exploration for a small ship capable of exploring not only a relatively deep region and a deep depth exploration region but also an island, System.

In addition, it can be used in a low water depth region, and the interval of the multi-channel receiving units can be maintained irrespective of the speed of the ship so that a constant exploration area can be maintained.

In addition, by correcting the position of the seismic exploration data by using a beacon, the error can be removed, and at least two or more multi-channel receivers can be provided, thereby providing the exploration area expansion and resolution enhancement effect.

FIG. 1 is a perspective view of a horizontal ship, a seismic wave generator, a multi-channel receiver, and a beacon mounted on a small ship in a three-dimensional seismic exploration system for a small ship using the beacon according to an embodiment of the present invention.
FIG. 2 is an enlarged perspective view of a horizontal receiver unit of a three-dimensional seismic exploration system for a small ship using a beacon according to an embodiment of the present invention, FIG. 3 is a plan view, Fig.
5 is a block diagram of a marine terminal of a small-sized marine three-dimensional seismic exploration system using a beacon according to an embodiment of the present invention.
FIG. 6 is a conceptual diagram illustrating the positional correction of seismic waves using a beacon of a small-sized three-dimensional seismic exploration system using a beacon according to an embodiment of the present invention. FIG. FIG. 9 is a diagram illustrating an example of a positional information and a data acquisition time to be recorded, FIG. 9 is an example of a change in the equipment arrangement during a search, FIG. 10 is an example of a positional displacement value and a data acquisition time recorded on the basis of information provided by a beacon, Fig. 11 is a view showing location information of a corrected sound source recorded in an acoustic wave trace header, Fig. 12 is a view showing ground layer information as an elastic wave trace display screen, and Fig. 13 is a view showing an overall view of the ground layer Fig. 14 is a view showing the GPS position and time information recorded in the elastic wave trace, and Fig. And FIG. 15 is an exemplary diagram of a screen displayed on the screen when a beacon is operated.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a small-sized three-dimensional seismic exploration system using a beacon according to the present invention will be described in detail.

FIG. 1 is a perspective view of a horizontal ship, a seismic wave generator, a multi-channel receiver, and a beacon mounted on a small ship in a three-dimensional seismic exploration system for a small ship using the beacon according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a horizontal receiver unit of a three-dimensional seismic exploration system for a small ship using a beacon according to an embodiment of the present invention, FIG. 3 is a plan view, Fig.

As shown in Fig. 1, the system of the present invention mainly comprises: a horizontal receiver 100; An elastic wave generating part 200; A multi-channel receiving unit 300; The beacon 400 includes a ship terminal 500 for communicating with the beacon.

The information stored in the marine terminal may be provided to a terminal located on the shore in the future, so that the terminal can output the three-dimensional topographic map.

In the case of the Republic of Korea, the three sides are surrounded by the sea, and the area where the oceanic three-dimensional stratum investigation area is widened is expanding its scope to real life.

Therefore, in the case of the West Sea and the South Sea, due to a large number of fishing vessels and fishing grounds, there is a restriction on the 3 - dimensional marine seismic exploration using large ships.

However, the above-mentioned problems can be solved through the constituent means of the present invention.

Specifically, it is as follows.

The horizontal receiver 100 is formed in a horizontal direction at the rear of the small vessel 50. [

In this case, the characteristic feature is that the horizontally extending part has a structure capable of expanding, so that it can be easily expanded and removed according to the environment of the water depth area and the exploration environment.

As shown in FIG. 1, the elastic wave generating unit 200 is configured to generate seawater or to generate elastic waves for three-dimensional image acquisition.

In the case of an air gun, compressed air is supplied to generate seismic waves. In the case of sparkers, electricity is supplied to generate seismic waves. In the case of an air gun, the seismic wave generating part is composed of an air gun, a boomer, a sparker, It can be configured to generate an acoustic wave by the vibration of the ceramic device.

In the case of FIG. 1, the elastic wave generating unit is shown as one, but two or more of them may be configured as necessary.

In addition, the multi-channel receiving unit 300 is installed at least two or more of the horizontal receivers, and is maintained at a predetermined interval.

As described above, it is possible to maintain the predetermined interval, and thus it is possible to provide the advantage that the exploration activity can be performed while maintaining a constant interval during the exploration time irrespective of the speed of the ship.

As shown in FIG. 4, the multi-channel receiver 300 includes a plurality of reception sensors 350 at predetermined intervals.

In the case of the multi-channel receiver 300, portions other than the area where the receiving sensor is located are formed of flexible material so as to extend from the ship to the water surface. However, the multi-channel receiver 300 may include a plurality of receiving sensors 350 Is formed of a material for preventing the blade from being easily bent by the speed of the ship while keeping the gap.

At this time, a plurality of predetermined regions are formed at predetermined intervals, which is defined as a multi-channel receiving unit.

As described above, the plurality of receiving sensors are filled with the filling material at the position where the receiving sensor of the multi-channel receiving unit 300 is located so as to maintain a constant interval, thereby preventing the position of the receiving sensor from being changed in advance do.

In other words, the most important factor in the search is to maintain the spacing of the receiving sensors.

Therefore, the internal space is filled with the filling material so as to maintain the predetermined interval between the receiving sensors.

In addition, the position of the receiving sensors should be located on the rear side rather than the elastic wave generating part, and should be always held in the water.

In the case of the filler, the oil 360 is preferably used.

2 to 3, the horizontal storage unit 100 includes an upper horizontal frame 110, a vertical frame 120, a lower horizontal frame 130, an extended groove 140, And an extension protrusion 150. As shown in FIG.

The coupling between the upper horizontal frame 110, the vertical frame 120, and the lower horizontal frame 130 may be performed by welding or a combination of bolts and nuts.

The vertical frame 120 is connected to both ends of the lower side of the upper horizontal frame, and a plurality of the vertical frames 120 can be installed at predetermined intervals as required.

The lower horizontal frame 130 is connected to the lower end of the vertical frame.

At this time, the extended groove part 140 is formed at one end of the upper horizontal frame and the lower horizontal frame so that it can be expanded according to the field situation of the exploration area.

And the extension protrusion of the other horizontal receiver connected to extend is inserted.

Further, the extended protrusion 150 is formed at the other end of the upper horizontal frame and the lower horizontal frame.

Then, it is inserted into the extended groove portion of the other horizontal receiving portion connected to extend.

On the contrary, in the case of reducing the width, the enlarged projection part of the other horizontal receiving part inserted into the enlarged groove part may be spaced apart from the enlarging groove part.

According to an additional feature of the present invention, a part of the multi-channel receiving unit 300 is inserted and fixed at a position spaced apart from the extended groove unit by a predetermined distance to maintain a gap between the multi- And may further include a mounting portion 160.

That is, when a part of the multi-channel receiving unit 300 is inserted through the spacing holding unit, the multi-channel receiving units 300 spaced apart at a predetermined interval can maintain a constant interval.

5 is a block diagram of a marine terminal of a small-sized marine three-dimensional seismic exploration system using a beacon according to an embodiment of the present invention.

5, the ship terminal 500 includes an equipment arrangement design information database 510, an acoustic wave generating and transmitting unit 520, an acoustic wave trace information extracting unit 530, a seismic trace information database 540, a position information correcting unit 550, and a correction position information updating unit 560.

On the other hand, in order to perform position correction in the marine terminal, at least two or more multi-channel receiving units 300 and beacons 400 are installed at the ends of the elastic wave generating units to provide beacon information to the marine terminal .

FIG. 6 illustrates a concept of position correction of a seismic exploration data using a beacon. After the design of the equipment, a seismic survey is performed, and the acquired location (elastic wave trace information, beacon information) And thereafter, the corrected GPS position information in the elastic wave trace information is updated.

The equipment arrangement design information database 510 includes information on the position of the GPS in the ship, the relative position information between the GPS and the elastic wave generating unit and the horizontal receiving unit 100 in which the multi-channel receiving unit is installed, the elastic wave generating unit, The length of the channel receiving unit, the distance between the respective multi-channel receiving units, and the number and interval of the receiving sensors (channels) in the multi-channel receiving unit.

That is, the position of the GPS in the ship before the seismic survey, the relative position (X, Y) between the GPS and the towing equipment (sound source, streamer), the towing length of the sound source and streamer , The number of channels in the streamer and the interval are determined to design the equipment arrangement, and the corresponding design information is stored in the equipment arrangement design information database.

Specifically, FIG.

And the equipment is installed on the ship based on the stored design information.

Then, an elastic wave generation signal is transmitted to the elastic wave generating unit through the elastic wave generating and transmitting unit 520.

At this time, the elastic wave trace information extracting unit 530 extracts location information and acquisition time information in the header of the elastic wave trace information including the ground layer information received from the multi-channel receivers, and stores the extracted information in the elastic wave trace information database.

The acquired information includes information such as coordinate (m), source depth (m), streamer depth (m), Year, Julian Day, Time, Minute, Second, and the like.

At this time, the elastic wave trace information extracted by the elastic wave trace information extracting unit is stored in the elastic wave trace information divider 540.

On the other hand, as shown in FIG. 9, since the position information recorded in the trace header uses the position information of the GPS installed in the vessel, when the arrangement of the apparatus designed at the time of the probe changes due to external factors, can not do it.

Therefore, the change of the designed equipment arrangement leads to the error of the ground information position, so it must go through the error correction process.

For this, the position information corrector 550 calculates the relative position change value of the beacon and the GPS in real time using the beacon information provided from the beacon and the elastic wave trace information stored in the elastic wave trace information database, It will be done.

In FIG. 10, the positional displacement value and the data acquisition time provided by the beacon are shown.

At this time, the position information corrector attaches a beacon to a source or a streamer, and calculates the displacement value (relative position change value of the beacon and the GPS) .

Thereafter, the correction position information updating unit 560 re-processes the GPS position information stored in the elastic wave trace information database to update the elastic wave trace information as shown in FIG.

At this time, the position information correcting unit 550 corrects

When correcting the raw GPS coordinate value and the positional displacement value (the relative position change value of the beacon and the GPS), the correction is performed by synchronizing based on the time value equally recorded in the two values.

As described above, the correction of the primitive coordinate value acquired by the GPS using the positional displacement value acquired through the beacon can provide the ground information at the precise position.

On the other hand, the correction of the position information correcting unit may use the following formula.

(수식)

(Equation)

(X = latitude, Y = longitude, Z = depth, a = location information acquired via GPS, and = location information acquired via beacon)

On the other hand, in the case of Fig. 12, the ground layer information is shown as an elastic wave trace display screen.

In the case of FIG. 13, a display screen is shown in which the intervals of the traces are narrowed to confirm the overall appearance of the ground layer.

14 is a graph showing GPS position and time information recorded in an elastic wave trace, and FIG. 15 is an exemplary view of a screen displayed on a screen when a beacon is operated.

With the above-described configuration, a three-dimensional seismic wave exploration system for a marine vessel capable of exploring not only an area with a relatively deep depth or an area with deep depth exploration, but also a coastal area having many islands and coastlines can be provided.

In addition, it can be used in a low water depth region, and the interval of the multi-channel receiving units can be maintained irrespective of the speed of the ship so that a constant exploration area can be maintained.

In addition, by correcting the position of the seismic exploration data by using a beacon, the error can be removed, and at least two or more multi-channel receivers can be provided, thereby providing the exploration area expansion and resolution enhancement effect.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is to be understood, therefore, that the embodiments described above are to be considered in all respects as illustrative and not restrictive.

100: Horizontal receiver unit
200: elastic wave generating part
300: Multi-channel receiver
400: Beacon
500: Ship terminal

Claims (4)

In a three-dimensional seismic exploration system for a small ship,
A horizontal water receiver 100 formed at the rear of the small vessel 50 in a horizontal direction;
An acoustic wave generating unit 200 installed at a central portion of the horizontal water receiving unit;
A multi-channel receiver 300 having at least two or more reception sensors 350 installed at predetermined intervals in the horizontal receiver,
A beacon (400) installed in an end of the at least two or more multi-channel receiving units (300) and an acoustic wave generating unit to provide beacon information to a marine terminal installed in a ship;
Generating seismic waves by operating the seismic wave generating unit, storing elastic wave trace information including GPS position information, acquisition time, and ground layer information in the elastic wave trace information database, and using the beacon information provided from the beacon, And a ship terminal (500) for updating and storing the elastic wave trace information by correcting the position information of the GPS, and storing the elastic wave trace information.
The method according to claim 1,
The horizontal handwheel (100)
An upper horizontal frame 110,
A vertical frame 120 connected to both lower ends of the upper horizontal frame,
A lower horizontal frame 130 connected to a lower end of the vertical frame,
An expansion groove 140 formed at one end of the upper horizontal frame and the lower horizontal frame for inserting an enlarged projection of another horizontally coupled portion to be extended,
An extension protrusion 150 formed at the other end of the upper horizontal frame and the lower horizontal frame to be inserted into the extended groove portion of the other horizontal wicking portion connected to extend,
And a spacing holder (160) for inserting and fixing a part of the multi-channel receiver (300) at a position spaced apart from the expansion slot by a predetermined distance to maintain the interval between the multi-channel receivers (300) A 3 - D Seismic Exploration System for Small Ship Using Beacon.
The method according to claim 1,
The ship terminal (500)
And a position information correcting unit 550 for correcting the position information of the ship by calculating the relative position change value of the beacon and the GPS in real time using the beacon information provided from the beacon and the elastic wave trace information stored in the elastic wave trace information database Dimensional beacon-based three-dimensional seismic exploration system using a beacon.
The method of claim 3,
The position information correcting unit 550,
Wherein the correction is performed by synchronizing the raw GPS coordinates value and the positional displacement value (the relative position change value of the beacon and the GPS) synchronized with the time value recorded equally to the two values. Three - dimensional seismic exploration system.

Images