CN107121702B - Earthquake detection device and method - Google Patents
Earthquake detection device and method Download PDFInfo
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- CN107121702B CN107121702B CN201710464052.8A CN201710464052A CN107121702B CN 107121702 B CN107121702 B CN 107121702B CN 201710464052 A CN201710464052 A CN 201710464052A CN 107121702 B CN107121702 B CN 107121702B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/38—Seismology; Seismic or acoustic prospecting or detecting specially adapted for water-covered areas
- G01V1/3808—Seismic data acquisition, e.g. survey design
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Abstract
The invention discloses a seismic exploration device and a seismic exploration method. The device comprises: the system comprises a seismic source controller, a transmitting head, a gun cable, a host, a signal transmission cable, a signal acquisition towing cable and a protection device; the source controller is connected with the emission head through a gun cable, the source controller is positioned in the ship chamber, and the emission head is positioned in water below the ice floating area; the host is connected with the signal acquisition towing rope through the signal transmission cable, the host is positioned in the ship room, and the signal acquisition towing rope is positioned in water below the floating ice area; the host is used for generating control parameters of the source controller; the gun cable and the signal transmission cable all penetrate through the inside of the protecting device, the protecting device is positioned at the stern, the upper end of the protecting device is positioned in the air above the ice floating area, and the lower end of the protecting device is positioned in the water below the ice floating area. By adopting the detection device or the detection method, the damage of the ice floes to the gun cable and the signal transmission cable can be avoided, the risks of equipment loss and damage are reduced, the seismic detection of the polar ice floes is realized, and the accuracy and the efficiency of the seismic detection are improved.
Description
Technical Field
The invention relates to the field of physical detection, in particular to a seismic detection device and a seismic detection method.
Background
Conventional marine seismic exploration is to drag a seismic source and an acquisition cable on the sea surface at the same time, excite seismic waves by a seismic source transmitting head, receive acoustic property data of the seismic waves reflected by the sea bottom through the acquisition cable, and further analyze and judge submarine geological conditions by calculating and mapping the acquired data. The conventional seismic exploration mode is suitable for seismic exploration in most sea areas, but the towing type detection device cannot be used in polar ice floes: the floating ice can easily crash or even cut off the focus gun cable and the acquisition cable, and the equipment is damaged due to the fact that the floating ice impacts the focus emission head, so that the earthquake detection cannot be performed normally. Therefore, the floating ice area is regarded as a forbidden area for sea exploration, and a seismic detection device suitable for the polar floating ice area is not available at present.
Disclosure of Invention
The invention aims to provide a seismic exploration device and a seismic exploration method, which can conduct seismic exploration in a polar ice-float area, ensure that the device is intact, and improve the accuracy of the seismic exploration in the polar ice-float area.
In order to achieve the above object, the present invention provides the following solutions:
a seismic exploration apparatus, the apparatus comprising: the system comprises a seismic source controller, a transmitting head, a gun cable, a host, a signal transmission cable, a signal acquisition towing cable and a protection device;
the source controller is connected with the emission head through the gun cable, the source controller is positioned in the ship chamber, and the emission head is positioned in water below the floating ice area;
the host is connected with the signal acquisition towing rope through the signal transmission cable, the host is positioned in the ship room, and the signal acquisition towing rope is positioned in water below the floating ice area;
the host is used for generating control parameters of the seismic source controller;
the gun cable and the signal transmission cable all pass through the inside of the protecting device, the protecting device is positioned at the stern, the upper end of the protecting device is positioned in the air above the ice floating area, and the lower end of the protecting device is positioned in the water below the ice floating area.
Optionally, the protecting device specifically includes: the cable guide device comprises a protective tube, a cable dividing groove and a cable guide rope;
the cable dividing groove and the cable guide rope are positioned in the protective tube;
the cable dividing groove is provided with N through holes, and each through hole penetrates through one gun cable or one signal transmission cable;
the cable guide rope is provided with N cables, and each through hole of the cable dividing groove correspondingly penetrates through one cable; the cable is used for pulling the cannon cable or the signal transmission cable into the through hole corresponding to the cable.
Optionally, the length of the cable rope is greater than 2 times of the height of the protection pipe, one end of the cable rope penetrates through the through hole of the cable dividing groove, and is wound out of the protection pipe and connected with the other end of the cable rope.
Optionally, the launching head is located on a mid-vertical plane of the vessel; the middle vertical plane is a plane parallel to the ship length direction.
Optionally, the number of the signal acquisition streamers is greater than 1, and the signal acquisition streamers are parallel to each other; the signal acquisition streamers are parallel to the ship in the ship length direction and are positioned on two sides of the transmitting head in the ship width direction.
Optionally, the device further comprises a floating ball, and the floating ball is connected with the transmitting head through a Kevlar rope.
Optionally, the launching head has a water depth of 20 meters, and the horizontal distance between the launching head and the ship is greater than 30 meters; the water depth of the signal acquisition towing cable is 20 meters, the horizontal distance between the starting end of the signal acquisition towing cable and the ship is more than 30 meters, and the starting end of the signal acquisition towing cable is one end connected with the signal transmission cable.
A method of seismic exploration, the method comprising:
connecting the head end of a gun cable in the earthquake detection device with an earthquake controller; the seismic exploration apparatus includes: the system comprises a seismic source controller, a transmitting head, a gun cable, a host, a signal transmission cable, a signal acquisition towing cable and a protection device; the seismic source controller is positioned in a ship room, the host is positioned in the ship room, and the host is used for controlling control parameters of the seismic source controller; the protection device is positioned at the stern, the upper end of the protection device is positioned in the air above the ice floating area, and the lower end of the protection device is positioned in the water below the ice floating area; the protection device specifically comprises: the cable guide device comprises a protective tube, a cable dividing groove and a cable guide rope; the cable dividing groove and the cable guide rope are positioned in the protective tube; the cable dividing groove is provided with N through holes, and each through hole penetrates through one gun cable or one signal transmission cable; the cable guide rope is provided with N cables, and each through hole of the cable dividing groove correspondingly penetrates through one cable; the cable is used for pulling the gun cable or the signal transmission cable into the through hole corresponding to the cable;
connecting the tail end of the gun cable with the head end of the cable, and pulling the gun cable into the protection pipe by pulling the tail end of the cable until the tail end penetrates out of the protection pipe; the head end of the cable is one end exposed above the protective tube, and the tail end of the cable is one end exposed below the protective tube;
the tail end of the gun cable is pulled to a deck, the connection between the tail end of the gun cable and the cable is disconnected, and the tail end of the gun cable is connected with the launching head;
controlling the speed of the ship within a first set speed range, and placing the launching head into water behind the stern;
raising the speed of the boat to a second set speed range to enable the launching head to be in a set depth range; the speed in the second set speed range is greater than the speed in the first set speed range;
connecting the head end of the signal transmission cable with the host, connecting the tail end of the signal transmission cable with the head end of the signal acquisition towing rope, connecting the tail end of the signal acquisition towing rope with the head end of another towing rope, and towing the signal acquisition towing rope into the protection pipe until the tail end penetrates out of the protection pipe by towing the tail end of the towing rope;
the signal acquisition towing rope is towed to a deck, and the tail end of the signal acquisition towing rope is disconnected with the cable;
placing the signal acquisition towing cable into water behind the stern so that the signal acquisition towing cable is positioned at the set depth;
and the host controls the emission interval of the seismic source controller and receives the seismic measurement data transmitted by the signal transmission cable.
Optionally, before the launching head is put into the water behind the stern, the method further comprises:
and the floating ball is connected with the transmitting head through the Kevlar pull rope, and the length of the Kevlar pull rope is adjusted to control the depth of the transmitting head after entering water.
Optionally, after the host controls the transmission interval of the source controller and receives the seismic measurement data transmitted by the signal transmission cable, the method further includes:
traction of the head end of the gun cable, and traction of the launching head to a range of a set distance from the stern;
pulling the transmitting head to a deck through the Kevlar rope;
disconnecting the gun cable from the firing head
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the gun cable and the signal transmission cable are protected through the protecting device, so that the damage of the ice floes to the gun cable and the signal transmission cable is avoided, the threat of the ice floes to the safety of the earthquake detection equipment is greatly reduced, and the risks of equipment loss and damage are reduced. By adopting the detection device and the detection method, the seismic detection of the polar ice floc area is realized, and the accuracy and the efficiency of the seismic detection are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of an embodiment 1 of a seismic acquisition device of the invention;
FIG. 2 is a perspective view of the seismic survey apparatus of embodiment 2 of the invention;
FIG. 3 is a top view of embodiment 2 of the seismic acquisition device of the invention;
FIG. 4 is a schematic view of a protective tube in an embodiment 2 of the seismic exploration apparatus of the invention
FIG. 5 is a perspective view of the structure of embodiment 1 of the guard device in the seismic survey apparatus of the present invention;
FIG. 6 is a perspective view of the structure of embodiment 2 of the guard in the seismic survey apparatus of the present invention;
fig. 7 is a perspective view showing a structure of a guard in an embodiment 3 of the seismic survey apparatus according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
FIG. 1 is a block diagram of an embodiment 1 of the seismic acquisition device of the invention. As shown in fig. 1, the apparatus includes:
host 101, signal transmission cable 102, signal acquisition towing cable 103, source controller 104, gun cable 105, emitter 106, and protection device 107;
the host 101 is connected with the signal acquisition towing cable 103 through a signal transmission cable 102, the host 101 is positioned in a ship room, and the signal acquisition towing cable 103 is positioned in water below the floating ice area; the source controller 104 is connected with the emission head 106 through the gun cable 105, the source controller 104 is positioned in the ship chamber, and the emission head 106 is positioned in water below the ice-floating area; the emitter head 106 is an underwater emitter head; the host 101 is further connected to the source controller 104, and is configured to generate control parameters of the source controller 104; the gun cable 105 and the signal transmission cable 102 pass through the inside of the protecting device 107, the protecting device 107 is positioned at the stern, the upper end of the protecting device 107 is positioned in the air above the ice floating area, and the lower end of the protecting device 107 is positioned in the water below the ice floating area. The guard 107 specifically includes: the cable guide device comprises a protective tube, a cable dividing groove and a cable guide rope; the cable dividing groove and the cable guide rope are positioned in the protective tube; the cable dividing groove is provided with N through holes, and each through hole penetrates through one gun cable or one signal transmission cable; the guide cables are provided with N cables, and each through hole of the cable dividing groove correspondingly penetrates through one cable; the cable is used for pulling the cannon cable or the signal transmission cable into the through hole corresponding to the cable. The length of the cable guide rope is 2 times greater than the height of the protective tube, one end of the cable guide rope penetrates through the through hole of the cable dividing groove and is wound out of the protective tube, and the cable guide rope is connected with the other end of the cable guide rope.
FIG. 2 is a perspective view of a seismic acquisition device according to embodiment 2 of the invention (the view is an oblique view with a top view). See fig. 3 for a top view of embodiment 2 of the device of the present invention.
As shown in fig. 2, the device comprises three parts: the device comprises a seismic control part, a seismic source emission part and a protection part.
The seismic control section includes: host 201, signal transmission cable 204, signal acquisition cable 205; the host 201 is located at a survey vessel laboratory and is connected to underwater signal acquisition streamers 205 by signal transmission cables 204. The host 201 is used for controlling the emission interval of the source controller 202, and receiving, monitoring and storing the seismic data in real time; the dry end of the signal transmission cable 204 is positioned on the survey vessel, connected with the host 201, and the wet end is positioned under water, connected with the signal acquisition towing cable 205, and used for transmitting the command of the host 201 to the signal acquisition towing cable 205 and transmitting the seismic data of the signal acquisition towing cable 205 to the host 201; the signal acquisition streamers 205 acquire seismic waves that are partially excited by the source emissions and seismic waves that are reflected by the formation.
The source emitting section includes: a source controller 202, a cannon cable 206, and an underwater firing head 207; the source controller 202 is located in a survey ship laboratory and is connected with the underwater launching head 207 through a gun cable 206; the cannon cable 206 transmits signals of the source controller 202 to the underwater launcher 207, the underwater launcher 207 being positioned underwater for exciting seismic waves; the dry end of the cannon cable 206 is positioned on the survey vessel for connection to the source controller 202 and the wet end is positioned underwater for connection to the underwater firing head 207. The underwater emission head 207 is powered by the source controller 202 by adopting negative high voltage, the source controller 202 is powered by alternating current with the voltage of 220V and the frequency of 50HZ, and the underwater emission head is internally provided with a control module, an energy storage capacitor bank, a charging module, a discharging module, a man-machine interface module and the like. The transmitting needle of the underwater transmitting head 207 is a negative high-voltage electrode, and the metal frame is a ground electrode.
The protecting part is the protecting device 203, and the protecting device 203 specifically includes: protective tubes, guide ropes, cable separation grooves and the like, and the specific structure is shown in fig. 4-7.
The number of the signal acquisition towlines 205 is greater than 1, in this figure, taking 2 signal acquisition towlines 205 as an example, the signal acquisition towlines 205 are parallel to each other, and parallel to the ship in the ship length direction, and are positioned on two sides of the underwater launching head 207 in the ship width direction, and the gun cables 206 and the signal acquisition towlines 205 are parallel to each other, and the larger the distance is, the better the mutual winding is avoided. The near-vessel end of the signal acquisition streamer 205 is aligned as horizontally as possible in the direction of the vessel width with the underwater launch head 207.
The signal transmission cable 204, the signal acquisition towing cable 205 and the gun cable 206 are all transmitted to the bottom of the stern to enter water through pulleys and a guide rope penetrating through a protection pipe, so that interference of floating ice is effectively avoided. The signal transmission cable 204 is connected with the signal acquisition towing cable 205 and the gun cable 206 is connected with the underwater launching head 207 by a bearing head.
The gun cable 206 and the signal transmission cable 204 of the invention both pass through the protection device 203, and pull the underwater launching head 207 and the signal acquisition towing cable 205 under the ice layer, thereby effectively avoiding damage during the ice region operation. During seismic exploration, the gun cable 206 and the underwater launching head 207 pulled by the gun cable 206 are towed in the stern seawater through the protective pipe at the stern, the water entering depth is about 20m, the horizontal distance between the underwater launching head 207 and the stern is not less than 30m, and the interference of floating ice and the interference of a noise source on the ship are effectively avoided; the signal transmission cable 204 and the signal acquisition towing cable 205 towed by the signal transmission cable are towed in the seawater at the stern through the protective pipe at the stern, the horizontal distance between the starting end of the signal acquisition towing cable 205 and the stern is not less than 30 meters, and the signal acquisition towing cable is aligned with the underwater launching head 207, and the water entering depth is about 20 meters, so that the interference of floating ice is effectively avoided.
The device also comprises a floating ball 208, and the floating ball 208 is connected with the underwater launching head 207 through a Kevlar rope. The floating ball 208 has the functions of: (1) The depth of the underwater launching head 207 is further controlled by controlling the length of the Kevlar rope; (2) When the underwater launching head 207 is recovered, the underwater launching head 207 is directly moved to the outlet of the protective pipe below the stern propeller by pulling the gun cable 206, so that the launching head 207 cannot be recovered. When the gun cable 206 is pulled to a certain length, the floating ball 208 is used, and the underwater launching head 207 is pulled to the deck by pulling the Kevlar rope on the floating ball 208, so that the underwater launching head 207 is recovered.
FIG. 4 is a schematic view of a guard device in a seismic exploration apparatus according to the present invention. As shown in fig. 4, the guard is located at the stern at a height approximately that of the deck of the ship to the propeller, the guard comprising: a protective tube 401, a guide rope 402 and a cable dividing groove (not shown in the figure). The cable dividing groove and the cable guide rope 402 are positioned inside the protective tube 401; the cable dividing groove is provided with N through holes, and each through hole penetrates through one gun cable or one signal transmission cable; the guide cable 402 has N cables, and each through hole of the cable dividing groove correspondingly passes through one cable; the cable is used to pull the cannon cable or the signal transmission cable into the through hole corresponding to the cable.
Referring to fig. 5-7 for specific structural diagrams of the protecting device, fig. 5 is a perspective structural diagram of embodiment 1 of the protecting device in the seismic detecting device according to the present invention; FIG. 6 is a perspective view of the structure of embodiment 2 of the guard in the seismic survey apparatus of the present invention; fig. 7 is a perspective view showing a structure of a guard in an embodiment 3 of the seismic survey apparatus according to the present invention.
As shown in fig. 5-7, the guard includes: a protective tube 501, a cable guide 502 and a cable dividing groove 503. The cable dividing groove 503 is provided with N through holes, each through hole correspondingly penetrates through one cable guiding rope 502, the cable guiding rope 502 is used for dragging a gun cable or a signal transmission cable into the through holes, and each through hole penetrates through one gun cable or one signal transmission cable, so that mutual winding and mutual interference between the gun cable and the signal transmission cable and between the signal transmission cable are avoided.
The length of the guide rope 502 is 2 times greater than the height of the protection pipe 501, one end of the guide rope 502 passes through the through hole of the cable dividing groove 503, is wound out of the protection pipe 501 and is connected with the other end of the guide rope 502, so that the guide rope 502 forms a ring shape, the loss in the use process is avoided, and the recycling is realized. In use, one end of the gun cable or signal transmission cable is connected to the portion of the guide cable 502 exposed above the protective tube 501, and the gun cable or signal transmission cable is led into the protective tube 501 from the upper end, passes through the protective tube 501, passes out from the lower end and then is connected with the corresponding device by pulling the portion of the guide cable 502 exposed below the protective tube 501.
The cable dividing groove 503 and the protective tube 501 may be made as one body or may be made as separate bodies, both of which are made as one body in fig. 5 and 7, and both of which are made as separate bodies in fig. 6. The height of the cable dividing groove 503 can be adjusted according to actual requirements; in fig. 5, the height of the cable dividing groove 503 is the same as that of the protective tube 501, which is equivalent to that of the solid cylindrical protective tube 501, and through holes are formed along the axial line, so that the cable dividing groove 503 can be used. In fig. 6, the cable dividing groove 503 and Gao Duyuan are far smaller than the height of the protective tube 501, which is equivalent to sleeving the thin cable dividing groove 503 in the hollow cylindrical protective tube 501. The height of the cable dividing groove 503 in fig. 7 is about one third of the height of the protective tube 501.
With the above device, the seismic exploration method embodiment 1 includes the following steps:
connecting the head end of the gun cable with the earthquake controller;
connecting the tail end of the gun cable with the head end of the cable, and pulling the gun cable into the protection pipe until the tail end penetrates out of the protection pipe by pulling the tail end of the cable; the head end of the cable is one end exposed above the protective tube, and the tail end of the cable is one end exposed below the protective tube;
the tail end of the gun cable is pulled to a deck, the connection between the tail end of the gun cable and the cable is disconnected, and the tail end of the gun cable is connected with the launching head;
controlling the speed of the ship within a first set speed range, and placing the launching head into water behind the stern;
raising the speed of the boat to a second set speed range to enable the launching head to be in a set depth range; the speed in the second set speed range is greater than the speed in the first set speed range;
connecting the head end of the signal transmission cable with the host, connecting the tail end of the signal transmission cable with the head end of another cable, and pulling the signal transmission cable into the protection pipe until the tail end penetrates out of the protection pipe by pulling the tail end of the cable;
disconnecting the tail end of the signal transmission cable from the cable, and connecting the tail end of the signal transmission cable with the head end of the signal acquisition towing cable;
placing the signal acquisition towing cable into water behind the stern so that the signal acquisition towing cable is positioned at the set depth;
and the host controls the emission interval of the seismic source controller and receives the seismic measurement data transmitted by the signal transmission cable.
With the above device, the seismic exploration method embodiment 2 includes the following steps:
one end of the gun cable is connected with the focus controller, the other end of the gun cable is connected with one end of the guide cable rope, passes through the protection pipe and returns to the stern deck through the traction of the guide cable, is connected with the underwater launching head (for example, an electric spark focus), connects the floating ball with the underwater launching head through the Kevlar rope, and adjusts the length of the Kevlar rope to control the depth of the launching head after entering water;
the measuring ship keeps sailing about 1-2 kn in the polar region floating ice area, and the underwater launching head and the floating ball are put into the seawater at the stern;
the ship speed is increased to 3kn for sailing, and the gun cable is long enough to enable the underwater launching head to enter water to a depth of about 20 meters, the horizontal distance from the stern is not less than 30 meters, and the influence of floating ice and a noise source on the ship is avoided;
connecting a signal acquisition towing rope with a host through a signal transmission cable;
one end of the signal acquisition towing rope is connected with one end of the guide rope and passes through the protective pipe to enter the ice-floating seawater through the traction of the guide rope;
gradually placing the signal acquisition towing rope into seawater at the stern, so that the water penetration depth of the signal acquisition towing rope is about 20 meters, the horizontal distance between the signal acquisition towing rope and the stern is not less than 30 meters, and the near-ship end of the signal acquisition towing rope is horizontally aligned with the underwater launching head as much as possible;
the earthquake source controller controls the underwater emission head to excite earthquake waves;
the signal acquisition towing cable receives the seismic signals and sends the seismic signals to the host through the signal transmission cable;
the host receives, monitors and stores the seismic data in real time and controls the emission interval of the seismic source;
after the measurement is completed, the signal transmission cable and the signal acquisition towing cable are recovered, and the guide cable is reserved to be positioned in the protection pipe, so that the next use is facilitated.
And then, the head end of the gun cable is pulled, and when the underwater launching head is pulled to the near stern (within a set distance range from the stern), the underwater launching head is recovered to the rear deck through the Kevlar rope on the underwater launching head and the ship A frame.
The connection of the gun cable wet end and the underwater launching head is disconnected, after the gun cable wet end is sealed and protected, the protection pipe is drawn out, and the guide cable is reserved in the protection pipe, so that the gun cable is convenient to use next time.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (4)
1. A seismic acquisition device, the device comprising: the system comprises a seismic source controller, a transmitting head, a gun cable, a host, a signal transmission cable, a signal acquisition towing cable and a protection device;
the source controller is connected with the emission head through the gun cable, the source controller is positioned in the ship chamber, and the emission head is positioned in water below the floating ice area;
the host is connected with the signal acquisition towing rope through the signal transmission cable, the host is positioned in the ship room, and the signal acquisition towing rope is positioned in water below the floating ice area;
the host is used for generating control parameters of the seismic source controller;
the gun cable and the signal transmission cable penetrate through the inside of the protecting device, the protecting device is positioned at the stern, the upper end of the protecting device is positioned in the air above the ice floating area, and the lower end of the protecting device is positioned in the water below the ice floating area;
the protection device specifically comprises: the cable guide device comprises a protective tube, a cable dividing groove and a cable guide rope;
the cable dividing groove and the cable guide rope are positioned in the protective tube;
the cable dividing groove is provided with N through holes, and each through hole penetrates through one gun cable or one signal transmission cable;
the cable guide rope is provided with N cables, and each through hole of the cable dividing groove correspondingly penetrates through one cable; the cable is used for pulling the gun cable or the signal transmission cable into the through hole corresponding to the cable;
the signal transmission cable and the gun cable are both transmitted to the bottom of the stern through the protective pipe by pulleys and the cable guide rope to enter water;
the length of the cable guide rope is 2 times greater than the height of the protective tube, one end of the cable guide rope penetrates through the through hole of the cable dividing groove and is wound out of the protective tube, and the cable guide rope is connected with the other end of the cable guide rope;
the device also comprises a floating ball, wherein the floating ball is connected with the transmitting head through a Kevlar rope;
the number of the signal acquisition towing cables is larger than 1, and the signal acquisition towing cables are parallel to each other; the signal acquisition towing cables are parallel to the ship in the ship length direction and positioned on two sides of the transmitting head in the ship width direction; the gun cable and the signal acquisition towing cable are mutually parallel, and the larger the distance is, the better the distance is.
2. The apparatus of claim 1, wherein the launch head is located on a mid-vertical plane of the vessel; the middle vertical plane is a plane parallel to the ship length direction.
3. The apparatus of claim 1, wherein the launch head is 20 meters deep in water, the launch head being spaced horizontally from the vessel by greater than 30 meters; the water depth of the signal acquisition towing cable is 20 meters, the horizontal distance between the starting end of the signal acquisition towing cable and the ship is more than 30 meters, and the starting end of the signal acquisition towing cable is one end connected with the signal transmission cable.
4. A method of seismic exploration, the method comprising:
connecting the head end of a gun cable in the earthquake detection device with an earthquake controller; the seismic exploration apparatus includes: the system comprises a seismic source controller, a transmitting head, a gun cable, a host, a signal transmission cable, a signal acquisition towing cable and a protection device; the seismic source controller is positioned in a ship room, the host is positioned in the ship room, and the host is used for controlling control parameters of the seismic source controller; the protection device is positioned at the stern, the upper end of the protection device is positioned in the air above the ice floating area, and the lower end of the protection device is positioned in the water below the ice floating area; the protection device specifically comprises: the cable guide device comprises a protective tube, a cable dividing groove and a cable guide rope; the cable dividing groove and the cable guide rope are positioned in the protective tube; the cable dividing groove is provided with N through holes, and each through hole penetrates through one gun cable or one signal transmission cable; the cable guide rope is provided with N cables, and each through hole of the cable dividing groove correspondingly penetrates through one cable; the cable is used for pulling the gun cable or the signal transmission cable into the through hole corresponding to the cable; the signal transmission cable and the gun cable are both transmitted to the bottom of the stern through the protective pipe by pulleys and the cable guide rope to enter water;
connecting the tail end of the gun cable with the head end of the cable, and pulling the gun cable into the protection pipe by pulling the tail end of the cable until the tail end penetrates out of the protection pipe; the head end of the cable is one end exposed above the protective tube, and the tail end of the cable is one end exposed below the protective tube;
the tail end of the gun cable is pulled to a deck, the connection between the tail end of the gun cable and the cable is disconnected, and the tail end of the gun cable is connected with the launching head;
controlling the speed of the ship within a first set speed range, and placing the launching head into water behind the stern;
raising the speed of the boat to a second set speed range to enable the launching head to be in a set depth range; the speed in the second set speed range is greater than the speed in the first set speed range;
connecting the head end of the signal transmission cable with the host, connecting the tail end of the signal transmission cable with the head end of the signal acquisition towing cable, connecting the tail end of the signal acquisition towing cable with the head end of another towing cable, and towing the signal acquisition towing cable into the protection pipe until the tail end penetrates out of the protection pipe by towing the tail end of the towing cable;
the signal acquisition towing rope is towed to a deck, and the tail end of the signal acquisition towing rope is disconnected with the cable;
placing the signal acquisition towing cable into water behind the stern so that the signal acquisition towing cable is positioned at the set depth;
the host controls the emission interval of the seismic source controller and receives the seismic measurement data transmitted by the signal transmission cable;
before placing the launching head into the water behind the stern, the method further comprises:
the floating ball is connected with the launching head through a Kevlar pull rope, and the length of the Kevlar pull rope is adjusted to control the depth of the launching head after water is filled;
the host controls the emission interval of the source controller, and after receiving the seismic measurement data transmitted by the signal transmission cable, the method further comprises:
traction of the head end of the gun cable, and traction of the launching head to a range of a set distance from the stern;
pulling the transmitting head to a deck through the Kevlar rope;
and disconnecting the gun cable from the launching head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710464052.8A CN107121702B (en) | 2017-06-19 | 2017-06-19 | Earthquake detection device and method |
Applications Claiming Priority (1)
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| CN102405419A (en) * | 2009-03-09 | 2012-04-04 | 离子地球物理公司 | Marine seismic surveying in icy or obstructed waters |
| CN104793255A (en) * | 2015-05-03 | 2015-07-22 | 国家海洋局第一海洋研究所 | Marine magnetic survey method and device for polar floating ice areas |
| CN206863236U (en) * | 2017-06-19 | 2018-01-09 | 国家海洋局第一海洋研究所 | A kind of seismic survey device |
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| CN102405419A (en) * | 2009-03-09 | 2012-04-04 | 离子地球物理公司 | Marine seismic surveying in icy or obstructed waters |
| CN104793255A (en) * | 2015-05-03 | 2015-07-22 | 国家海洋局第一海洋研究所 | Marine magnetic survey method and device for polar floating ice areas |
| CN206863236U (en) * | 2017-06-19 | 2018-01-09 | 国家海洋局第一海洋研究所 | A kind of seismic survey device |
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