WO2023279675A1 - Dispositif de surveillance sismique sous-marine de type chaîne - Google Patents

Dispositif de surveillance sismique sous-marine de type chaîne Download PDF

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Publication number
WO2023279675A1
WO2023279675A1 PCT/CN2021/141171 CN2021141171W WO2023279675A1 WO 2023279675 A1 WO2023279675 A1 WO 2023279675A1 CN 2021141171 W CN2021141171 W CN 2021141171W WO 2023279675 A1 WO2023279675 A1 WO 2023279675A1
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WO
WIPO (PCT)
Prior art keywords
seismic
chain
monitoring device
seismic monitoring
composite cable
Prior art date
Application number
PCT/CN2021/141171
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English (en)
Chinese (zh)
Inventor
周建平
丘磊
陶春辉
王汉闯
张国堙
徐巍军
邓显明
柳云龙
吴涛
Original Assignee
自然资源部第二海洋研究所
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Application filed by 自然资源部第二海洋研究所 filed Critical 自然资源部第二海洋研究所
Publication of WO2023279675A1 publication Critical patent/WO2023279675A1/fr

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Classifications

    • 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
    • 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
    • G01V1/3843—Deployment of seismic devices, e.g. of streamers
    • G01V1/3852—Deployment of seismic devices, e.g. of streamers to the seabed

Definitions

  • the invention relates to the technical field of ocean detection, in particular to a chain-type submarine seismic monitoring device.
  • a submarine seismograph is an instrument placed on the seabed for natural or artificial earthquake monitoring.
  • ZL200410101868.7 which is a spherical seismometer with a recovery device and sink coupling.
  • 2017 a similar low-power broadband seismometer was proposed.
  • seabed seismometers that have been disclosed or in use are self-recovery seabed seismometers placed on the seabed.
  • the online seismograph that is suitable for the connection of the seabed observation network.
  • Yang Ting and others proposed a self-buried seabed seismometer 201811024588.9.
  • the seismometer is installed in the drill bit. Driven by the driving component, the drill bit is screwed into the seabed sediment, which can effectively reduce the influence of the sea bottom current on the seismometer and reduce the long gravity. Wave periodic low-frequency noise improves data quality, especially the data quality of the horizontal component.
  • the self-buried seabed seismograph can reduce noise to a certain extent, it requires drill bit machinery, the buried depth is relatively shallow, and it is not an online seismograph, and it is not suitable for formation.
  • the purpose of the present invention is to provide a high-performance submarine seismic monitoring device.
  • the above-mentioned technical purpose of the present invention is achieved through the following technical solutions: comprising an earthquake detection unit, the earthquake detection unit includes an instrument compartment and a left transition compartment and a right transition compartment respectively connected to the left and right ends of the instrument compartment, the The left conversion chamber and the right conversion chamber are spliced with the instrument chamber to form a detection chamber structure.
  • the instrument chamber is equipped with seismic monitoring sensors, and the left and right exits of the left conversion chamber are respectively provided with left first A photoelectric connector and a left second photoelectric connector, the right side outlet and the left side outlet of the right conversion chamber are respectively provided with a right first photoelectric connector and a right second photoelectric connector, the left side of the left first photoelectric connector and The right side of the right first photoelectric connector is respectively connected with an outer photoelectric composite cable, between the left first photoelectric connector and the left second photoelectric connector and between the right first photoelectric connector and the right second photoelectric connector respectively Connected with an internal transfer photoelectric composite cable.
  • the rigidity of the first left photoelectric connector and the first right photoelectric connector is greater than the rigidity of the outer photoelectric composite cable.
  • the instrument bin is cylindrical and extends axially in the left and right directions
  • the left and right conversion bins are both axially conical truncated bins in the left and right directions
  • the left conversion bin consists of
  • the outer diameter size gradually decreases from right to left
  • the outer diameter size of the right conversion bin gradually decreases from left to right. It runs through from left to right and forms a frustum-shaped right inner space.
  • the left first photoelectric connector is fixed at the left outlet of the left conversion chamber
  • the left second photoelectric connector is fixed on the right side of the instrument chamber and extends into the left inner space
  • the right first photoelectric connector The connector is fixed at the right side outlet of the right transition chamber
  • the second right photoelectric connector is fixed on the left side of the instrument chamber and stretches into the right inner space.
  • the instrument compartment includes an outer sealed compartment
  • the outer sealed compartment includes an outer cylinder with an axial direction in the left and right directions, and a left seal cover and a left seal cover that are sealed and assembled at the outlets on the left and right sides of the outer cylinder.
  • the right sealing cover, a sub-closed compartment is also arranged in the outer sealed compartment, and the earthquake monitoring sensor is installed in the sub-closed compartment.
  • a gap is formed between the outer sealed chamber and the outer sealed chamber and is filled with a liquid coupling agent.
  • a counterweight is installed in the sub-closed compartment.
  • the earthquake monitoring sensor is installed on the upper side of the counterweight.
  • the counterweight extends in the left-right direction and the upper surface forms a flat mounting surface.
  • the cross-section of the weight block perpendicular to the axial direction is in the shape of a semicircle.
  • a chain-type submarine seismic monitoring device includes more than two seismic detection units, all the seismic detection units are connected in series to form a monitoring chain, and adjacent seismic detection units are connected by an external photoelectric composite cable.
  • the instrument compartment is provided with an earthquake monitoring sensor, a multi-channel number acquisition module, a power supply module, a network communication module, an attitude monitoring module and an attitude adjustment module.
  • the seismic monitoring sensor is a three-component seismic monitoring sensor and each component is perpendicular to each other at 90 degrees, and the seismic monitoring sensor is a broadband sensor.
  • all the seismic detection units are arranged in a straight line.
  • the left side of the leftmost seismic detection unit also has an external photoelectric composite cable and is connected to the switch
  • the right side of the rightmost seismic detection unit also has an external photoelectric composite cable and is electrically connected to the switch.
  • the earthquake detection unit includes an instrument compartment and a left transition compartment and a right transition compartment respectively connected to the left and right ends of the instrument compartment.
  • the radial size of the left conversion bin gradually decreases from right to left
  • the radial size of the right conversion bin gradually decreases from left to right
  • the left conversion bin and the right conversion bin are the same as the The instrument compartments are spliced into a spindle-shaped structure.
  • the instrument compartment is provided with a counterweight near the bottom, and the seismic monitoring sensor, multi-channel number acquisition module, power supply module, network communication module, attitude monitoring module and attitude adjustment module are all installed in the The upper part of the counterweight.
  • the outer photoelectric composite cables between adjacent seismic detection units are horizontal and higher than the bottom of the instrument compartment.
  • the outer photoelectric composite cable between adjacent seismic detection units is covered with several protective sheaths for the outer photoelectric composite cable to pass through and support the outer photoelectric composite cable.
  • Beneficial effects of the present invention Aiming at the deficiencies of the prior art, combined with the applicant's work experience in the development of observation nodes of the seabed observation network, and aiming at the characteristics of my country's offshore wide continental shelf and strong destruction of seabed fishery activities, a new submarine seismic monitoring device is provided And the test method can realize multiple devices in series and array, and is suitable for deep buried seismic monitoring methods, and provides related devices for my country's submarine online seismic monitoring with high precision, high signal-to-noise ratio and high safety.
  • the current submarine seismic devices are basically suitable for short-term ocean surveys, and are directly installed on the seabed surface. Natural noise such as tidal currents, surface ships and underwater target noise make the signal recognition low, and are also very easy to be detected by underwater fisheries. activities are disrupted.
  • the device of the present application can better solve the above problems.
  • the submarine seismic monitoring device of the present application can be used alone, or connected in series to form a chained submarine seismic monitoring device.
  • the single seabed seismic monitoring device of this application is a tubular or rope structure, which is not easy to receive interference when laid on the seabed, and has strong anti-interference ability, and the stability of use after series connection is better, and by realizing multiple positions Monitoring greatly improves the reliability of data.
  • Fig. 1 is the schematic diagram of the three-dimensional structure of a kind of chain seabed seismic monitoring device in embodiment 2;
  • Fig. 2 is a three-dimensional structural schematic diagram of a single seabed seismic monitoring device in Fig. 1 after the outer cylinder is removed;
  • Fig. 3 is a schematic diagram of the three-dimensional structure after removing the inner cylinder 101 in the structure in Fig. 2;
  • Fig. 4 is the sectional view of the top view perspective after the upper half of the single seabed seismic monitoring device in Fig. 1 is cut;
  • Fig. 5 is a three-dimensional structural schematic diagram of the structure in Fig. 1 with a raised protective cover;
  • Fig. 6 is a system diagram of a chain seabed seismic monitoring device in embodiment 2 when it is used in a seabed array.
  • a submarine seismic monitoring device is a horizontal structure, including an earthquake detection unit 1, and the earthquake detection unit 1 includes an instrument cabin 11 and two left and right sides of the instrument cabin.
  • the left conversion bin 12 and the right conversion bin 13 are respectively connected to the ends, and the left conversion bin 12 and the right conversion bin 13 are spliced with the instrument bin 11 to form a detection bin body structure, and the instrument bin 11 has an earthquake monitoring sensor 4
  • the left conversion chamber 12 and the right conversion chamber 13 are not only transfer stations for subsequent optical cable conversion, but also further enhance and protect the structural stability of the entire monitoring device, ensuring the balance of the left and right sides of the instrument chamber 11.
  • a left first photoelectric joint 121 and a left second photoelectric joint 122 are respectively provided at the left exit and the right exit of the left conversion bin 12, and the right exit and the left exit of the right conversion bin 13
  • the right first photoelectric connector 131 and the right second photoelectric connector 132 are respectively arranged at each place, and these photoelectric connectors can all adopt the existing strip-shaped waterproof connectors extending in the left and right directions.
  • the left side of the left first photoelectric connector 121 and the right side of the right first photoelectric connector 131 are respectively connected with an external photoelectric composite cable 2, and the external photoelectric composite cable 2 is used for charging, communication, etc., and can be used Existing relatively mature optical cables are sufficient.
  • the second left photoelectric connector 122 and the second right photoelectric connector 132 are further electrically connected to the power supply module and the communication module of the instrument compartment 11 through wires.
  • the wireless charging module and the wireless communication module can also be plugged into the right side of the second left photoelectric connector 122 and the left side of the second right photoelectric connector 132 to pair with the corresponding modules inside the instrument compartment 11 .
  • Inner transfer photoelectric composite cables 22 are respectively connected between the left first photoelectric connector 121 and the left second photoelectric connector 122 and between the right first photoelectric connector 131 and the right second photoelectric connector 132 .
  • the internal transfer photoelectric composite cable 22 can also adopt existing relatively mature optical cables. The purpose of this transfer is to optimize the point of force, and the support of the first left photoelectric connector 121 and the first right photoelectric connector 131 and the structure of the left conversion bin 12 and the right conversion bin 13 can be used to align the optical cables.
  • the pulling force is more optimized, and it is also to allow the outer photoelectric composite cable 2 to be erected on the left and right sides of the instrument compartment, because the instrument compartment 11 has a height up and down, and the outer photoelectric composite cable 2 is preferably located in the middle of the instrument compartment 11. set, so this structure effectively guarantees the support of the optical cable.
  • the design is better in structure, so that the lying mode of the device on the seabed is more reliable, the stability of the structure itself is also improved, and both left and right sides can be used for power supply and communication. More importantly, , the monitoring device with this structure can be used in series, the applicability and application range are wider, and it is more conducive to the use in various environments, which will be further discussed later.
  • the rigidity of the left first photoelectric connector 121 and the right first photoelectric connector 131 is greater than the rigidity of the outer photoelectric composite cable 2 .
  • the instrument compartment 11 is cylindrical and extends axially in the left and right directions.
  • the instrument compartment 11 is a closed compartment closed left and right, and the left conversion compartment 12 and the right conversion compartment 13 are two protective compartments around the instrument compartment 11 Cover, the left conversion bin 12 and the right conversion bin 13 are all axially conical-shaped bins in the left and right directions, and the left conversion bin 12 gradually decreases in outer diameter from right to left, and the right conversion bin 13
  • the outer diameter size gradually decreases from left to right, and the inside of the left conversion chamber 12 penetrates left and right to form a frustum-shaped left inner space 120.
  • the space size of the left inner space 120 gradually decreases from right to left, so
  • the inside of the right conversion chamber 13 runs through left and right to form a right inner space 130 of a cone shape, and the space size of the right inner space 130 gradually decreases in diameter from left to right.
  • the left first photoelectric joint 121 is fixed at the left outlet of the left conversion bin 12, and can be installed on the left side outlet of the left conversion bin 12 by means of screw connection, the left side outlet of the left conversion bin 12 and the left first
  • the contact part of the photoelectric connector 121 is provided with a threaded groove, which of course can also be fixed by the existing fixing method. This structure is also convenient for the external photoelectric composite cable 2 to be plugged in on the outside.
  • the left second photoelectric connector 122 is fixed on the right side of the instrument compartment 11 and extends into the left inner space 120.
  • the left second photoelectric connector 122 can be fixed on the left sealing cover 112 described later, and the fixing method adopts the existing connector installation method. Can.
  • the right first photoelectric connector 131 is fixed at the right exit of the right conversion chamber 13, refer to the aforementioned fixing method.
  • the second right photoelectric connector 132 is fixed on the left side of the instrument compartment 11 and extends into the right inner space 130.
  • the second right photoelectric connector 132 can be fixed on the right sealing cover 113 described later.
  • the left switching bin 12, the right switching bin 13, and the instrument bin 11 can all be made of waterproof materials such as stainless steel.
  • the instrument compartment 11 includes an outer sealed compartment
  • the outer sealed compartment includes an outer cylinder 111 with the axial direction in the left and right directions and a left sealing cover 112 and The right sealing cover 113
  • a sub-closed compartment is also arranged in the outer sealed compartment
  • the earthquake monitoring sensor 4 is installed in the sub-closed compartment.
  • the sub-enclosed chamber includes an inner cylinder 101 axially in the left and right directions, and a left inner cover 102 and a right inner cover 103 that are sealed and assembled at the outlets on the left and right sides of the inner cylinder 101 . That is to say, the outer sealed warehouse and the sub-closed warehouse are all cylindrical horizontal structures.
  • a gap is formed between the outer sealed chamber and the outer sealed chamber and is filled with a liquid coupling agent, and the liquid coupling agent can preferably use silicone grease.
  • a counterweight 1100 is installed in the sub-enclosed compartment, and it is advisable that the counterweight 1100 is located in the lower half of the sub-enclosed compartment.
  • the counterweight 1100 can adopt structures such as cast iron blocks, and can also be fixed by screwing In the sub-enclosed compartment, the main purpose is to ensure the stability of the device, which is achieved by increasing the weight.
  • the earthquake monitoring sensor 4 is installed on the upper side of the counterweight 1100 .
  • the counterweight 1100 extends in the left-right direction and forms a flat installation surface 11000 on the upper surface. Try to ensure the flatness of the upper surface.
  • the cross-section of the counterweight 1100 perpendicular to the axial direction is in a semicircular shape, that is, the counterweight 1100 is a horizontal semi-cylindrical structure.
  • the above-mentioned submarine seismic monitoring device already has a very good effect of detecting submarine earthquakes. Through the lying structure design, it has a better use effect when buried on the seabed, is less affected by interference, and reduces the mechanical support structure and signal interference. The attenuation will be less, and the monitoring data will be more accurate.
  • Embodiment 2 is a chain-type submarine seismic monitoring device.
  • This embodiment can adopt all the structures of Embodiment 1, and is also a more optimized application device derived from Embodiment 1, and is suitable for more Use in sea areas with different environments.
  • the seismic detection unit 1 includes more than two seismic detection units 1, and all the seismic detection units 1 are connected in series to form a monitoring chain, and the adjacent seismic detection units 1 are connected by an external photoelectric composite cable 2.
  • the outer photoelectric composite cable 2 is arranged in a linear array, and the seismic detection unit 1 at each position can monitor and share data through the outer photoelectric composite cable 2, which not only constitutes a structurally stable monitoring chain system, but also realizes data sharing. Sharing and transportation can be applied to a wider range of seabed monitoring and data collection, and the reliability is also higher.
  • the instrument compartment 11 is provided with an earthquake monitoring sensor 4, a multi-channel acquisition module 44, a power supply module, a network communication module, an attitude monitoring module and an attitude adjustment module.
  • These modules and sensors can all use existing equipment.
  • the seismic monitoring sensor 4 can be a three-component seismic monitoring sensor, and each component is perpendicular to each other at 90 degrees, and the seismic monitoring sensor 4 can be a broadband sensor.
  • all the seismic detection units 1 are arranged in a straight line. This structure can be used in a certain area. If it is to be used in a larger area, it can also be used around a bend to form a curved monitoring array. Further, the leftmost seismic detection unit 1 also has an external photoelectric composite cable 2 on the left side and is connected to the switch, and the rightmost seismic detection unit 1 has an external photoelectric composite cable 2 on the right side and is electrically connected to the switchboard. The switch can then be connected to a computer and other devices for control.
  • the earthquake detection unit 1 includes an instrument compartment 11 and a left transition compartment 12 and a right transition compartment 13 respectively connected to the left and right ends of the instrument compartment, and the left transition compartment 12 moves from right to left
  • the radial dimension gradually decreases
  • the radial dimension of the right conversion bin 13 gradually decreases from left to right
  • the left conversion bin 12 and the right conversion bin 13 are spliced with the instrument bin 11 into a spindle-shaped structure, that is, Structures other than the truncated cone can be used, mainly to form a spindle-shaped structure and form a more stable and reliable structure.
  • the instrument compartment 11 is provided with a counterweight 1100 at the bottom, and the seismic monitoring sensor 4, multi-channel number acquisition module, power supply module, network communication module, attitude monitoring module and attitude adjustment module are all installed in the The upper part of the counterweight 1100 is installed to ensure the reliability of this structural fixation as much as possible and reduce the interference between structures.
  • the outer photoelectric composite cable 2 between adjacent seismic detection units 1 is horizontal and higher than the bottom of the instrument compartment 11 .
  • the outer photoelectric composite cable 2 between the adjacent seismic detection units 1 is sheathed with several protective sheaths t for the outer photoelectric composite cable 2 to pass through and support the outer photoelectric composite cable 2 .
  • the purpose of raising the protective cover t is to ensure the levelness of the outer photoelectric composite cable 2 and to ensure the consistency of the height of the entire outer photoelectric composite cable 2.
  • the inside of the raised protective cover t is preferably nested with an inner flexible sleeve similar to a rubber sleeve. It is advisable for the composite cable 2 to pass through the inner flexible sheath, and the raised protective sheath t can be made of metal anti-corrosion material.
  • the sealing covers on both sides of the instrument compartment are respectively connected to the left and right conversion compartments, one end of the conversion compartment is docked with the instrument compartment, and the other end is an extendable outer photoelectric composite Cable 2, and can be connected to the next conversion chamber.
  • Multiple instrument chambers and conversion chambers can be connected into arrays to construct various forms, and can be buried in seabed sediments to form an effective anti-noise regional array monitoring method.
  • the structure of a single seismic detection unit is that the two conversion chambers are connected by an open instrument chamber at both ends.
  • the docking part of the instrument chamber and the conversion chamber can be fixed by bolts. Or connected, so that a single seismic detection unit into a spindle-shaped structure, easy to lay and bury in the seabed.
  • the instrument compartment and conversion compartment adopt parallel dual optical cable communication, which can ensure stable signal transmission when multiple devices are connected in series, and each device does not affect the communication of the link.
  • the novel seabed seismic monitoring device of the present invention can be buried in seabed sediments, and compared with instruments on the seabed surface, it can prevent damage to it caused by human or underwater biological activities, and has higher safety sex;
  • the submarine seismic monitoring device of the present invention can be connected in series to form an array, and arranged in different intervals and different shapes. Through multi-point monitoring and data post-processing, the submarine seismic information can be obtained with higher precision. At the same time, it is buried in the seabed sediment, and the sediment blocks the ocean noise, which can improve the signal-to-noise ratio of the monitoring data and have higher recognition accuracy for useful information;
  • the new submarine seismic monitoring device of the present invention adopts a modular design and an overall spindle-shaped design, which can be conveniently formed into an array, and can be conveniently installed at sea using the current mature offshore engineering implementation technology.
  • the invention is suitable for seabed seismic monitoring and research. Because of the method of burying and area array, it is beneficial to reduce the influence of environmental noise on the sea surface and in seawater, and improve the quality of monitoring signals, and is especially suitable for shallow sea sedimentary areas and seabed microseismic monitoring.

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  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Oceanography (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Remote Sensing (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

L'invention concerne un dispositif de surveillance sismique sous-marine de type chaîne, se rapportant au domaine technique de l'exploration océanique, et comprenant plus de deux unités de détection sismique (1). Toutes les unités de détection sismique (1) sont reliées en série pour former une chaîne de surveillance, et les unités de détection sismique adjacentes (1) sont reliées au moyen d'un câble composite photoélectrique externe (2).
PCT/CN2021/141171 2021-07-07 2021-12-24 Dispositif de surveillance sismique sous-marine de type chaîne WO2023279675A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110767907.0A CN113552634B (zh) 2021-07-07 2021-07-07 一种链式海底地震监测装置
CN202110767907.0 2021-07-07

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CN113552634B (zh) * 2021-07-07 2022-07-19 自然资源部第二海洋研究所 一种链式海底地震监测装置
LU501375B1 (de) * 2021-12-28 2022-08-10 First Institute Of Oceanography Mini Of Natural Resources eine tragbare Kuolong-Strömungsmesser-unterstützende Meeresbeobachtungsvorrichtung

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US6483776B1 (en) * 1998-11-13 2002-11-19 Arne Rokkan Seismic cable with sensor elements being heavier than the cable
CN1269513A (zh) * 2000-04-26 2000-10-11 西安石油勘探仪器总厂 海底拖曳四分量地震数据采集一体化单元
US20070187170A1 (en) * 2004-04-16 2007-08-16 Eldar Lien Method for collection and registration seismic data
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CN113552634A (zh) * 2021-07-07 2021-10-26 自然资源部第二海洋研究所 一种链式海底地震监测装置

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