CN102176051B - Deep-towed split-type pulse plasma source system - Google Patents
Deep-towed split-type pulse plasma source system Download PDFInfo
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- CN102176051B CN102176051B CN201110025495XA CN201110025495A CN102176051B CN 102176051 B CN102176051 B CN 102176051B CN 201110025495X A CN201110025495X A CN 201110025495XA CN 201110025495 A CN201110025495 A CN 201110025495A CN 102176051 B CN102176051 B CN 102176051B
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- 230000005622 photoelectricity Effects 0.000 claims description 7
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- 238000002309 gasification Methods 0.000 claims description 5
- 239000013535 sea water Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 3
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- 238000005516 engineering process Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
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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
- G01V1/02—Generating seismic energy
- G01V1/157—Generating seismic energy using spark discharges; using exploding wires
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Abstract
The invention discloses a deep-towed split-type pulse plasma source system which comprises a direct current charging unit, a high-voltage pulse unit and an emitting array, wherein the direct current charging unit is arranged on a sea surface, the high-voltage pulse unit and the emitting array are arranged adjacent to a sea bed, and a towed transmission line is used for connecting the direct current charging unit with the high-voltage pulse unit so as to obviously improve the resolution of the source system in deep-sea exploration, even achieve an ultra-high resolution, and greatly reduce the pulse transmission loss, therefore, the deep-towed split-type pulse plasma source system has good application prospect in the sea earthquake exploration and the mineral exploration and development of the seabed flammable ice and the like.
Description
Technical field
The invention belongs to the Seismic exploration and development technical field, be specifically related to a kind ofly deeply drag the separated type pulse plasma seismic source system for the exploitation of offshore shooting and mineral reserve.
Background technology
Sparker source is one of non-explosive source that is applied to the earliest offshore shooting.Yet due to the poor repeatability of traditional electrical spark source wavelet, so sparker source is just progressively substituted by other focus.In recent years, along with appearance and the multi-electrode of high-power semiconductor switch are launched the application of battle array without arc discharge, the pulsed discharge focus is applied to oceanographic engineering seismic exploration technique field again, in order to be different from traditional sparker source, the pulsed discharge focus is referred to as again pulse plasma seismic source system.
Pulse plasma seismic source system mainly comprises the pulse power (comprising charhing unit and pulse unit) and emission battle array.Compare with traditional sparker source, pulse plasma seismic source system has the advantages such as source wavelet good reproducibility, energy transmission efficiency is high, safe and reliable, the life-span is long.The seismic prospecting of the multiplex Yu Haiyang engineering of pulse plasma seismic source system, can arrive between thousands of joules tens according to the difference of the requirements such as the depth of water, substrate type, required stratum penetration depth, the output energy of focus, penetration depth can reach 100m～250m, and can reach the resolution of 0.3m～1m.
Conventional pulse plasma seismic source system is placed in the sea by launching the battle array towing, the pulse power is positioned on ship, and be that the pulse transmission line of 50 meters to 100 meters is connected both with length, to carry out offshore shooting.But due to the difference of the depth of water, its exploration resolution is also different.For profundal zone (greater than 500 meters), because propagation distance is far away, the first Fresnel zone radius is larger, and its real standard resolution is difficult to reach below 1 meter, thereby has restricted the precision of offshore shooting.
Summary of the invention
The invention provides a kind of separated type pulse plasma seismic source system that deeply drags, it adopts the technology of splitting of deeply dragging, can obviously improve the resolution of Seismic Source System deep-sea exploration, even reach ultrahigh resolution, and effectively overcome and deeply drag the burst transmissions loss problem of bringing.
A kind of separated type pulse plasma seismic source system that deeply drags comprises DC charging unit, high-voltage pulse unit and emission battle array.
Described DC charging unit is used for alternating current is converted to high voltage direct current, and to the high-voltage pulse unit charging, it is placed on the sea;
Described high-voltage pulse unit is used for the high voltage direct current that the DC charging unit provides is converted to high-voltage pulse, and to the discharge of emission battle array, it is placed near the seabed;
Described DC charging unit is connected by the towing transmission line with described high-voltage pulse unit;
Described emission battle array is used for receiving the high pressure pulse discharge of high-voltage pulse unit, makes emitting electrode neighbouring seawater gasification, ionization form High Temperature High Pressure pulse heat plasma, and produces pulsed pressure wave, and it is placed near the seabed.
Principle of work of the present invention is: by the towing transmission line, the DC charging unit is connected with the high-voltage pulse unit, by the high-voltage pulse transmission line, the high-voltage pulse unit be connected with the emission battle array and be placed near deep seafloor, deeply dragging the separated type pulse plasma seismic source system thereby be combined into.The DC charging unit is converted to high voltage direct current with individual event or three-phase alternating current, and charge to the storage capacitor in the high-voltage pulse unit by the towing transmission line, after charging is completed, the conducting that is triggered of transwitch in the high-voltage pulse unit, thereby produce high-voltage pulse and be loaded on the electrode of emission battle array, make near seawater gasification, the ionization of emitting electrode of emission battle array form High Temperature High Pressure pulse heat plasma, thereby produce pulsed pressure wave.
In preferred technical scheme, described towing transmission line is the photoelectricity composite transmission line, its hv transmission line and signal light transmission cable by sub-thread or multiply forms, can not only guarantee the reliability of high-tension current transmission, simultaneously can make again described high-voltage pulse unit and external signal treatment facility carry out communication and data transmission, facilitate the related data information of staff's Real-Time Monitoring high-voltage pulse unit.
In preferred technical scheme, described towing transmission line is wound on electric winch, by electric winch work, can conveniently control the towing depth of described high-voltage pulse unit and described emission battle array, and then the exploration resolution of regulating system.
In preferred technical scheme, described high-voltage pulse unit is deposited in high-pressure chamber, can make high-voltage pulse unit internal components avoid hydraulic pressure and impacts and be damaged.
In preferred technical scheme, described emission battle array is linear array or square formation.
In preferred technical scheme, described DC charging unit employing switching power circuit.
In preferred technical scheme, described deeply to drag the operating frequency range of separated type pulse plasma seismic source system be 500Hz to 10kHz.
Useful technique effect of the present invention is:
(1) by adopting the technology of deeply dragging, will launch battle array and be placed near the seabed, can obviously improve the resolution of Seismic Source System deep-sea exploration, even reach ultrahigh resolution.
(2) by DC charging unit and high-voltage pulse unit being split (be high-voltage pulse unit close with the emission battle array put), shortened the length of high-voltage pulse transmission line, thereby greatly reduced the burst transmissions loss.
(3) be wound on electric winch by pulling transmission line, make electric winch work, can conveniently control the towing depth of high-voltage pulse unit and emission battle array.
(4) make the high-voltage pulse unit carry out communication and data transmission by signal light transmission cable and external signal treatment facility, facilitate the related data information of staff's Real-Time Monitoring high-voltage pulse unit.
Description of drawings
Fig. 1 is system architecture schematic diagram of the present invention.
Fig. 2 is system principle schematic diagram of the present invention.
Embodiment
In order more specifically to describe the present invention, below in conjunction with the drawings and the specific embodiments, technical scheme of the present invention and relative theory are elaborated.
As shown in Figure 1, a kind of separated type pulse plasma seismic source system that deeply drags comprises DC charging unit 4, high-voltage pulse unit 3, photoelectricity composite transmission line 2, emission battle array 1, high-pressure chamber 6 and electric winch 5.
DC charging unit 4 adopts switching power circuit, be used for individual event or three-phase alternating current be converted to high voltage direct current (2kV～-6kV), and the storage capacitors in high-voltage pulse unit 3 are charged, it is placed on ship, and is connected with high-voltage pulse unit 3 by photoelectricity composite transmission line 2.
High-voltage pulse unit 3 is comprised of solid-state storage capacitor, transwitch, thyristor gating circuit, fly-wheel diode and high-voltage pulse transmission line, be used for the high voltage direct current that DC charging unit 4 provides is converted to high-voltage pulse, and to 1 discharge of emission battle array, it is placed near the seabed, and be connected with emission battle array 1 by the high-voltage pulse transmission line, impact and be damaged in order to make internal components avoid hydraulic pressure, high-voltage pulse unit 3 is deposited in high-pressure chamber 6.
Emission battle array 1 is comprised of emitting electrode, binding post and support, be used for to receive the high pressure pulse discharge of high-voltage pulse unit 3, make emitting electrode neighbouring seawater gasification, ionization form High Temperature High Pressure pulse heat plasma, and generation pulsed pressure wave, it is placed near the seabed, and emission battle array 1 can be linear array or square formation.
Photoelectricity composite transmission line 2 is comprised of hv transmission line and the signal light transmission cable of sub-thread or multiply, can not only guarantee the reliability of high-tension current transmission, can make again simultaneously the high-voltage pulse unit 3 carry out communication and data transmission with the external signal treatment facility, facilitate the related data information of staff's Real-Time Monitoring high-voltage pulse unit 3.
Photoelectricity composite transmission line 2 is wound on electric winch 5, and electric winch 5 is placed on ship, by electric winch 5 work, can conveniently control the towing depth of high-voltage pulse unit 3 and emission battle array 1.
As shown in Figure 2, the DC charging unit is converted to individual event or three-phase alternating current-and 2kV is to the high voltage direct current of-6kV, and charge by the solid-state storage capacitor in photoelectricity multiplexing of transmission alignment high-voltage pulse unit, after charging is completed, the conducting that is triggered of the transwitch in the high-voltage pulse unit.The application of transwitch and fly-wheel diode can realize the monopulse output of high-voltage pulse unit.
The discharge process of high-voltage pulse unit can be divided into two stages basically.Phase one is the capacitor discharge stage, be loaded into high-voltage pulse on the electrode of emission battle array this moment, electric current flow through solid-state storage capacitor, transwitch, high-voltage pulse transmission line and emitting electrode, electric capacity discharges all energy, a part that releases energy is used for making emission battle array emitting electrode neighbouring seawater gasification, ionization to form High Temperature High Pressure pulse heat plasma, and another part is stored in the inductance of discharge loop; Subordinate phase is the inductive discharge stage, electric capacity this moment discharge off, and transwitch cuts out, electric current flow through fly-wheel diode, high-voltage pulse transmission line and emitting electrode, thus eliminate current oscillation, realize Single Pulse Discharge.
Deeply drag the separated type pulse plasma seismic source system by adopting the technology of deeply dragging, will launch battle array and be placed near the seabed, can obviously improve the resolution of Seismic Source System deep-sea exploration, even reach ultrahigh resolution; By DC charging unit and high-voltage pulse unit being split (be high-voltage pulse unit close with the emission battle array put), shortened the length of high-voltage pulse transmission line, inductance and the internal resistance of discharge loop are reduced greatly, thereby greatly reduced loss, made the present invention in the mineral explorations such as offshore shooting and seabed combustible ice exploitation, good application prospect be arranged.
Claims (3)
1. dark separated type pulse plasma seismic source system that drags comprises DC charging unit, high-voltage pulse unit and emission battle array, it is characterized in that:
Described DC charging unit is used for alternating current is converted to high voltage direct current, and to the high-voltage pulse unit charging, it is placed on the sea; Described DC charging unit adopts switching power circuit;
Described high-voltage pulse unit is used for the high voltage direct current that the DC charging unit provides is converted to high-voltage pulse, and to the discharge of emission battle array, it is placed near the seabed; Described high-voltage pulse unit is deposited in high-pressure chamber;
Described DC charging unit is connected by the towing transmission line with described high-voltage pulse unit; Described towing transmission line is the photoelectricity composite transmission line, and its hv transmission line and signal light transmission cable by sub-thread or multiply forms; Described towing transmission line is wound on electric winch;
Described emission battle array is used for receiving the high pressure pulse discharge of high-voltage pulse unit, makes emitting electrode neighbouring seawater gasification, ionization form High Temperature High Pressure pulse heat plasma, and produces pulsed pressure wave, and it is placed near the seabed.
2. the separated type pulse plasma seismic source system that deeply drags according to claim 1 is characterized in that: described emission battle array is linear array or square formation.
3. the separated type pulse plasma seismic source system that deeply drags according to claim 1, it is characterized in that: operating frequency range is 500Hz to 10kHz.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110025495XA CN102176051B (en) | 2011-01-24 | 2011-01-24 | Deep-towed split-type pulse plasma source system |
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| CN201110025495XA CN102176051B (en) | 2011-01-24 | 2011-01-24 | Deep-towed split-type pulse plasma source system |
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| CN102176051A CN102176051A (en) | 2011-09-07 |
| CN102176051B true CN102176051B (en) | 2013-06-05 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102733754B (en) * | 2012-06-28 | 2014-05-21 | 浙江大学 | Pulse plasma drilling machine system |
| CN102983774B (en) * | 2012-12-17 | 2015-04-22 | 浙江大学 | Liquid phase pulse discharge system based on multi-way switch delay output |
| CN105676293B (en) * | 2016-01-20 | 2017-12-12 | 浙江大学 | A kind of plasma focus transmitting battle array based on micro-porous electrode structure |
| CN106646633A (en) * | 2016-12-15 | 2017-05-10 | 中国海洋大学 | System and method for marine underway detection of seabed gas eruption |
| CN106990431B (en) * | 2017-05-18 | 2023-08-15 | 国家***第一海洋研究所 | Offshore bottom hydrate detection system |
| CN108508488A (en) * | 2018-04-20 | 2018-09-07 | 浙江大学 | A kind of plasma focus transmitting battle array of pressure resistance entrant sound structure |
| CN110412648A (en) * | 2019-08-20 | 2019-11-05 | 广州海洋地质调查局 | A kind of small patches high-resolution three-dimension system for acquiring seismic data and method |
| CN112987102A (en) * | 2019-12-13 | 2021-06-18 | 中国科学院深圳先进技术研究院 | In-situ monitoring system for geological conditions of natural gas hydrate storage layer |
| CN111123350A (en) * | 2019-12-30 | 2020-05-08 | 浙江大学 | Ultra-large energy double-subarray pulse plasma seismic source system |
| CN117310793B (en) * | 2023-11-29 | 2024-02-06 | 自然资源部第一海洋研究所 | Deepwater seismic source transmitting array capable of being continuously excited and working method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201654243U (en) * | 2010-03-23 | 2010-11-24 | 浙江大学 | Pulsed plasma coherent transmitting array for deep sea shallow stratum seismic exploration |
| CN202049240U (en) * | 2011-01-24 | 2011-11-23 | 浙江大学 | Deep dragging split type pulse plasma seismic source system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2009055918A1 (en) * | 2007-11-02 | 2009-05-07 | Marport Canada Inc. | System and method for underwater seismic data acquisition |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201654243U (en) * | 2010-03-23 | 2010-11-24 | 浙江大学 | Pulsed plasma coherent transmitting array for deep sea shallow stratum seismic exploration |
| CN202049240U (en) * | 2011-01-24 | 2011-11-23 | 浙江大学 | Deep dragging split type pulse plasma seismic source system |
Non-Patent Citations (1)
| Title |
|---|
| 裴彦良等.脉冲等离子体震源及其在海洋地震勘探方面的应用.《科技导报》.2007,第25卷(第19期),第48-52页. * |
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