CN106873027B - A kind of double focus wide-azimuths sea 3-D seismics detection method - Google Patents
A kind of double focus wide-azimuths sea 3-D seismics detection method Download PDFInfo
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- CN106873027B CN106873027B CN201710080273.5A CN201710080273A CN106873027B CN 106873027 B CN106873027 B CN 106873027B CN 201710080273 A CN201710080273 A CN 201710080273A CN 106873027 B CN106873027 B CN 106873027B
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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
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/18—Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
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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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- Engineering & Computer Science (AREA)
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- Acoustics & Sound (AREA)
- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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Abstract
The present invention relates to a kind of double focus wide-azimuths sea 3-D seismics detection methods, this method uses two expanders, a super large energy plasma focus and a plurality of earthquake towed cable, it is laid by specific combination, it can be realized the detection of wide-azimuth 3-D seismics, wherein, super large energy plasma focus includes focus host, cable and two transmitting battle arrays；Plasma emission battle array is combined to composition expander and focus transmitting battle array combination with expander, and its cloth is placed on to the two sides of earthquake towed cable array；The azimuthal three dimensional seismic data of buried target wider range can be obtained in this way.The method of the present invention passes through the detection of different direction angle, can effectively realize marine 3-D seismics detection, can be effectively applied to the fine detection of gas hydrates ore body and seabed superficial part disaster geology phenomenon.
Description
Technical field
The present invention relates to a kind of double focus wide-azimuths sea 3-D seismics detection methods, belong to seismical technique neck
Domain.
Background technique
Marine seismic exploration is a kind of important geophysical exploration method.It is for resource investigation, sedimentary structure unit
It divides and the investigation of investigation, the especially energy such as marine oil and gas and gas hydrates such as Geological Hazard has important war
Slightly meaning.Common marine seismic exploration, using the working method of the more cables of single source list cable or single source, the seismic reflection data of acquisition
It is from the same azimuth or relatively narrow azimuth coverage.Original detection mode is unfavorable for subsurface investigation target
Accurately image.
Summary of the invention
The purpose of the present invention is to provide a kind of double focus wide-azimuths sea 3-D seismics detection methods.
To achieve the goals above, technical scheme is as follows.
A kind of double focus wide-azimuths sea 3-D seismics detection method,
A kind of double focus wide-azimuth 3-D seismics detection methods, this method use two expanders, a super large energy
Plasma focus and a plurality of earthquake towed cable, are laid by specific combination, can be realized wide-azimuth dimensionally
Shake detection, wherein super large energy plasma focus includes focus host, cable and two transmitting battle arrays；By plasma emission battle array
Composition expander and focus transmitting battle array combination are combined with expander, and its cloth is placed on to the two sides of earthquake towed cable array；It is logical
The azimuthal three dimensional seismic data of buried target wider range can be obtained by crossing this mode；It is shaken using super large energy plasma
Source, while two transmitting battle arrays are controlled, it can either be with the random plesiochronous Transmitted station of tiny time difference, it can also be by setting
Time interval alternate emission seismic wave；Earthquake towed cable cloth is placed on after the stern of research vessel, using lesser towing cable spacing and compared with
Short cable length, according to the different earthquake towed cable combination of different detection target selections.
Further, towing cable spacing is 12.5 meters, 25 meters or 50 meters.
Further, cable length range is 50 meters~750 meters.
Expander and focus in the specific implementation, are emitted battle array knot by folding arm crane or other ancillary equipments first by this method
Fit gradually lengthen focus cable into the water, and expander and focus transmitting battle array combination are put into setting position, what a is put
Lay another again later；By folding arm crane or other ancillary equipments by stern mark into the water, then earthquake towed cable is slowly put
Enter in water, until whole cable enters water completely；Previous step work is repeated, one by one into the water by earthquake towed cable, according to detection mesh
Target feature determines the quantity of cable length and towing cable；All devices all enter water and fixed bit postpones, and research vessel enters work shape
State, according to setting survey line and blow out and to start a seismic exploration；When operation after spark source charging, according to navigation system
Instruction battle array combination is emitted by expander and focus, high-voltage electricity is discharged into seawater, formed in specified shot position
Seismic wave.Seismic wave is received after the propagation in seawater and stratum by earthquake towed cable, to obtain with underground structure information
Signal.
Invention has the beneficial effects that: the method for the present invention passes through the detection of different direction angle, can effectively realize sea
Upper 3-D seismics detection, can be effectively applied to the fine spy of gas hydrates ore body and seabed superficial part disaster geology phenomenon
It surveys.
Detailed description of the invention
Fig. 1 is the device connection schematic diagram of method used in the embodiment of the present invention.
Description of symbols in figure: 1, expander and focus emit battle array combination；2, focus cable；3, stern mark；4, earthquake towed cable；
5, research vessel.
Specific embodiment
A specific embodiment of the invention is described with reference to the accompanying drawing, to better understand the present invention.
Double focus wide-azimuth 3-D seismics detection methods in the embodiment of the present invention, this method using two expanders,
One super large energy plasma focus and a plurality of earthquake towed cable, are laid by specific combination, can be realized width
Azimuth 3-D seismics detection, wherein super large energy plasma focus includes focus host, cable and two transmitting battle arrays；It will wait
Gas ions transmitting battle array combines composition expander and focus transmitting battle array combination with expander, and its cloth is placed on earthquake towed cable battle array
The two sides of column；The azimuthal three dimensional seismic data of buried target wider range can be obtained in this way；Use super large energy
Measure plasma focus, while controlling two transmitting battle arrays, can either with the poor plesiochronous Transmitted station of random tiny time,
Transmitted station can be alternated according to set time；Earthquake towed cable cloth is placed on after the stern of research vessel, and use is lesser
Towing cable spacing and shorter cable length, according to the different earthquake towed cable combination of different detection target selections.Between towing cable
Away from being 12.5 meters, 25 meters or 50 meters.Cable length range is 50 meters~750 meters.
Double focus wide-azimuth 3-D seismics detection methods in the present embodiment pass through folding arm in the specific implementation first
Hang or other ancillary equipments by expander and focus transmitting battle array combination 1 into the water, gradually lengthen focus cable 2, will extend
Device and focus transmitting battle array combination 1 are put into setting position, what a is put and lays another again later；By folding arm crane or other are auxiliary
Help equipment by stern mark 3 into the water, then slowly into the water by earthquake towed cable 4, until whole cable enters water completely；In repetition
The work of one step determines the quantity of cable length and towing cable according to the characteristics of detection target one by one into the water by earthquake towed cable 4,
A kind of typically configure is 4 cables, and every cable is 120, and road spacing is 3.125 meters, 375 meters of cable length；It is all to set
Standby all to enter water and fixed bit postpones, research vessel 5 enters working condition, according to setting survey line and blow out and start a seismic prospecting and make
Industry；When operation after spark source charging, expander and shake are passed through in specified shot position according to the instruction of navigation system
High-voltage electricity is discharged into seawater by source transmitting battle array combination 1, forms seismic wave.Seismic wave after the propagation in seawater and stratum,
It is received by earthquake towed cable 4, to obtain the signal for having underground structure information.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (4)
1. a kind of double focus wide-azimuth 3-D seismics detection methods, it is characterised in that: this method uses two expanders, one
Super large energy plasma focus and a plurality of earthquake towed cable, are laid by specific combination, can be realized wide-azimuth
Angle 3-D seismics detection, wherein super large energy plasma focus includes focus host, cable and two transmitting battle arrays；By plasma
Body transmitting battle array combines composition expander and focus transmitting battle array combination with expander, and its cloth is placed on earthquake towed cable array
Two sides；The azimuthal three dimensional seismic data of buried target wider range can be obtained in this way；Use super large energy etc.
Gas ions focus, while controlling two transmitting battle arrays, can either be with the poor plesiochronous Transmitted station of random tiny time, can also be with
Transmitted station is alternated according to set time；Earthquake towed cable cloth is placed on after the stern of research vessel, using lesser towing cable
Spacing and shorter cable length, according to the different earthquake towed cable combination of different detection target selections.
2. double focus wide-azimuth 3-D seismics detection methods according to claim 1, it is characterised in that: between the towing cable
Away from being 12.5 meters, 25 meters or 50 meters.
3. double focus wide-azimuth 3-D seismics detection methods according to claim 1, it is characterised in that: the cable is long
Spending range is 50 meters~750 meters.
4. double focus wide-azimuth 3-D seismics detection methods according to claim 1, it is characterised in that: this method is having
When body is implemented, expander and focus are emitted into the water by battle array combination by folding arm crane or other ancillary equipments first, gradually
Lengthen focus cable, and expander and focus transmitting battle array combination are put into setting position, what a is put and lays another again later；
By folding arm crane or other ancillary equipments by stern mark into the water, then slowly into the water by earthquake towed cable, until whole electricity
Cable enters water completely；Previous step work is repeated, one by one into the water by earthquake towed cable, determines that cable is long according to the characteristics of detection target
The quantity of degree and towing cable；All devices all enter water and fixed bit postpones, and research vessel enters working condition, according to setting survey line and
Blow out a beginning seismic exploration；When operation after spark source charging, according to the instruction of navigation system, in specified shot point
Position emits battle array combination by expander and focus and high-voltage electricity is discharged into seawater, forms seismic wave；Seismic wave passes through in sea
It after the propagation on water and stratum, is received by earthquake towed cable, to obtain the signal for having underground structure information.
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| CN201710080273.5A CN106873027B (en) | 2017-02-07 | 2017-02-07 | A kind of double focus wide-azimuths sea 3-D seismics detection method |
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| CN108828672B (en) * | 2018-08-01 | 2020-04-24 | 西南石油大学 | Novel marine multi-ship-width azimuth seismic acquisition method |
| CN109239782B (en) * | 2018-08-30 | 2020-04-10 | 广州海洋地质调查局 | Natural gas hydrate fine seismic exploration system and method |
| CN110703312A (en) * | 2019-08-20 | 2020-01-17 | 广州海洋地质调查局 | Double-source multi-cable narrow-spacing control system and method |
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| CN101706584B (en) * | 2009-11-29 | 2012-05-02 | 中国海洋大学 | High-precision oceanic earthquake exploration data acquisition system |
| FR2961316A1 (en) * | 2010-06-10 | 2011-12-16 | Cggveritas Services Sa | PROCESS FOR PROCESSING SEISMIC MARINE DATA |
| CN103217708B (en) * | 2012-01-18 | 2015-10-28 | 中国石油天然气集团公司 | Obtain the method for the complete single cable list focus earthquake section of marine many cables streamer seismic collection |
| US9181788B2 (en) * | 2012-07-27 | 2015-11-10 | Novas Energy Group Limited | Plasma source for generating nonlinear, wide-band, periodic, directed, elastic oscillations and a system and method for stimulating wells, deposits and boreholes using the plasma source |
| AU2013211510A1 (en) * | 2012-08-09 | 2014-02-27 | Cgg Services Sa | Adaptive sweep method and device for seismic exploration |
| EP2720069B1 (en) * | 2012-10-12 | 2022-06-15 | Sercel | A seismic cable for seismic prospection tolerant to failure on power supplying and/or data transmission lines |
| CN103344991B (en) * | 2013-05-03 | 2015-09-09 | 中国海洋石油总公司 | A kind of double source earthquake collection method for offshore seismic exploration and acquisition system |
| WO2016076953A1 (en) * | 2014-11-11 | 2016-05-19 | Exxonmobil Upstream Research Company | Cable head marine seismic source |
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