CN101706584B - High-precision oceanic earthquake exploration data acquisition system - Google Patents
High-precision oceanic earthquake exploration data acquisition system Download PDFInfo
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- CN101706584B CN101706584B CN2009102315289A CN200910231528A CN101706584B CN 101706584 B CN101706584 B CN 101706584B CN 2009102315289 A CN2009102315289 A CN 2009102315289A CN 200910231528 A CN200910231528 A CN 200910231528A CN 101706584 B CN101706584 B CN 101706584B
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Abstract
The invention relates to a high-precision oceanic earthquake exploration multichannel data acquisition system, mainly comprising a pc control engine, an excitation earthquake focus, a towrope control unit and multi-channel digital towropes. The invention is characterized in that the multi-channel digital towropes are 24 extensible high-resolution oceanic earthquake exploration multi-channel digital towropes, and the front end of a head working section and the back end of a tail working section are respectively provided with a front deep-towing controller and a back deep-towing controller for controlling towrope sinking depths. Depth sensors and pressure sensors for monitoring the working depth and pressure of the towropes in real time are also arranged in digital packets in the multi-channel digital towropes. An integrative early warning device for monitoring the working states of system software and the towropes in real time is arranged in the towrope control unit so as to monitor the working state of the data collecting system in real time and early warn failures for avoiding unnecessary losses.
Description
Technical field
The data acquisition system (DAS) of using when the present invention relates to a kind of geophysical survey, particularly a kind of high-precision oceanic earthquake exploration multi-channel data acquisition system.
Background technology
Oceanic earthquake exploration data acquisition system is the key equipment of ocean seism prospecting data collecting.The Data Receiving towing cable of offshore shooting system employing at present is dummycable, needs external equipment could realize digitized sampling.Nautical receiving set in the towing cable distributes and is mostly big track pitch arrangement design, and resolution and signal to noise ratio (S/N ratio) are all lower.In recent years, domestic units concerned have developed the multiple channel streamer cable of some high-resolution, but its investigation depth is more shallow, and resolution only can satisfy the needs of mid-deep strata and shallow engineering seismic prospecting, do not reach the requirement of high-resolution seismic survey.In addition, the heavy degree of depth of putting during towing cable work at present is all limited, and maximum can only reach depth of water 35m, and when surpassing 35m, towing cable can't operate as normal, brings certain restriction to offshore construction.Though the towing cable that external multichannel seismic exploration system adopts is existing has realized digitizing, also can reach the requirement of high-precision oceanic earthquake exploration with regard to its resolution, its cost is very high, can't satisfy domestic actual demand.
In addition; Present offshore shooting system shows in real time the data cases of gathering with playback through display, still amateur operating personnel can't be from the display data presented acquisition quality of real-time differentiation data, especially when acquisition system breaks down because of acquisition software, towing cable or explosive source; Can't in time pinpoint the problems; Therefore influence the quality of data of gathering greatly, incured loss through delay the investigation and prospecting process, caused unnecessary loss.
Summary of the invention
The purpose of this invention is to provide a kind of high-precision oceanic earthquake exploration multi-channel data acquisition system, to remedy the deficiency of prior art.
The present invention is on the basis of existing acquisition system, mainly is the improvement to multiple tracks digital streamer and nautical receiving set combination mode, and the prior-warning device that duty is monitored in real time is set.
Technical scheme of the present invention comprises the pc main control system, explosive source, and the towing cable control module is by deck section; First stretch section, preceding dark drag controller, first active section, digital packets; The tail active section, the dark drag controller in back, tail stretch section; Tail tag, joint, multiple tracks digital streamer and differential GPS that the titanium alloy joint constitutes; It is characterized in that above-mentioned multiple tracks digital streamer is 24 roads, and extendible high-resolution multi-channel digital marine seismic streamer for ocean seismic prospecting, first again active section front end and tail active section rear end are respectively arranged with a heavy preceding dark drag controller and the dark drag controller in back of putting the degree of depth of control towing cable.
The nautical receiving set combination of above-mentioned multiple tracks digital streamer per pass has 8 groups of equidistance to amount to 18 nautical receiving sets, and the arrangement mode of 18 nautical receiving sets in the combination of per pass nautical receiving set is 3,1,2 successively; 4,1,2; 3,2 equidistance differential weights combination, the spacing of each nautical receiving set is 0.78m.Spacing between the above-mentioned nautical receiving set combination also is 0.78m.
Be provided with depth transducer and pressure transducer that the degree of depth and pressure when the multiple tracks digital streamer worked are monitored in real time in the above-mentioned digital packets.
Be provided with the prior-warning device that the duty of system and towing cable is monitored in real time in the above-mentioned towing cable control module.
The digital packets of using in the above-mentioned multiple tracks digital streamer is a SeaMUX24 road digital packets.
Advantage of the present invention: a. realizes that on the multiple tracks digital streamer digital-to-analog conversion becomes the digitizing towing cable, makes the multiple tracks digital streamer under corresponding sampling rate, can reach the expansion of main road number; B. heavy when putting depth depth of water 300m, but multiple tracks digital streamer operate as normal still; C. the multiple tracks digital streamer adopts the 6.25m small distance between receivers to arrange, and has improved spatial resolution greatly; D. the time-sampling rate is high, and its sampling rate is up to 1/16ms, but and the scope choice of sampling rate nearly: 1/16ms, 1/8ms, 1/4ms, 1/2ms, 1ms, 2ms, 4ms; E. the digital packets in the multiple tracks digital streamer is optional to signal programmable-gain value: OdB, 12dB, 24dB, 36dB, 42dB; F. the multiple tracks digital streamer receives the bandwidth of signal: 5Hz-8kHz; G. system's investigation depth is dark, cooperates 6000 joules of sparker sources, satisfies in the depth of water greater than 1000 meters the detection of submarine sedimentary strata greater than 1000 meter layers; But the duty of the prior-warning device real-time monitoring system that is provided with of the present invention h., the forecast system fault is avoided unnecessary loss; Physical location when i. differential GPS is accurately located the work of multiple tracks digital streamer.
Description of drawings
Fig. 1 is a general structure synoptic diagram of the present invention.
Fig. 2 is a multiple tracks digital streamer general structure synoptic diagram of the present invention.
Fig. 3 is a digital packets structural representation of the present invention.
Fig. 4 is a nautical receiving set combination mode synoptic diagram of the present invention.
Fig. 5 is a prior-warning device structural representation of the present invention.
Wherein, 1pc main control computer, 2 towing cable control modules, 3 explosive sources, 4 multiple tracks digital streamers, 5 prior-warning devices; 6 differential GPSs, 7 deck section, 8 first stretch sections, 9 preceding dark drag controllers, 10 first active sections, 11 digital packets; 12 tail active sections, the dark drag controller in 13 backs, 14 tail stretch sections, 15 tail tags, 16 joints; 17 titanium alloy joints, 18 depth transducers, 19 pressure transducers, 20 nautical receiving sets, the combination of 21 nautical receiving sets.
Embodiment
Like Fig. 1 and 2, the present invention includes pc main control system 1, towing cable control module 2, explosive source 3; By deck section 7, first stretch section 8, preceding dark drag controller 9, first active section 10; Digital packets 11, tail active section 12, the dark drag controller 13 in back, tail stretch section 14; Tail tag 15, joint 16, multiple tracks digital streamer 4 and differential GPS that titanium alloy joint 17 constitutes; It is characterized in that above-mentioned multiple tracks digital streamer 4 is 24 roads, and extendible high-resolution multi-channel digital marine seismic streamer for ocean seismic prospecting, first active section front end and tail active section rear end are respectively arranged with a heavy preceding dark drag controller 9 and the dark drag controller 13 in back of putting the degree of depth of control towing cable.
Like Fig. 2, multiple tracks digital streamer 4 of the present invention is high resolving power offshore shooting 24 road digital streamers, and maximum can expand to 9600 roads; Its structure is followed successively by: deck section 7; First stretch section 8, first active section 10 is used for 24 road digital packets 11 of digital-to-analog conversion; Tail active section 12; Tail stretch section 14, the tail tag 15 many group cable inner with being arranged on towing cable, along the 24 road nautical receiving sets combinations that towing cable initial and end active section length direction sets gradually, it is characterized in that above-mentioned first active section 10 front ends and tail active section 12 rear ends are respectively arranged with a maintenance level when making towing cable work and the heavy preceding dark drag controller 9 and the dark drag controller 13 in back of putting the degree of depth of control towing cable in real time.
Multiple tracks digital streamer 4 of the present invention (is example with 24 roads); Be respectively to be provided with 12 road nautical receiving sets combinations in its first active section 10 and the tail active section 12; Concrete deck section 7 150m at least that selects, first stretch section 8 is 25m at least, and first active section 10 is 75m at least; Tail active section 12 is 75m at least, and tail stretch section 14 is 25m and tail tag 15 at least.Between deck section 7 and the first stretch section 8 and tail stretch section 14 ends have titanium alloy joint 17 to be connected.Dark drag controller 9 before being provided with between first stretch section 8 and the first active section 10 is connected by SeaMUX24 road digital packets 11 between the drag controller 13 deeply after being provided with between tail active section 12 and the tail stretch section 14, first active section 10 and tail active section 12.
Like Fig. 3; Above-mentioned digital packets 11 has adopted up-to-date SeaMUX24 road digital packets that seismic signal is carried out digital-to-analog conversion; Connect first active section 10 and tail active section 12; And in this digital packets 11, be provided with commercially available depth transducer 18 and pressure transducer 19 that the degree of depth and pressure when the multiple tracks digital streamer worked are monitored in real time, the degree of depth and pressure when the multiple tracks digital streamer is worked are monitored in real time, better guarantee the accuracy of the safety and the image data of multiple tracks digital streamer.
Like Fig. 4,18 nautical receiving sets are adopted in the nautical receiving set combination 21 of per pass in above-mentioned first active section 10 and the tail active section 12, and the arrangement mode of 18 nautical receiving sets 20 in the combination of per pass nautical receiving set is 3,1 successively; 2,4,1; 2,3,2 equidistance differential weights combination; The interval S of each nautical receiving set 20 is 0.78m, and the spacing between the nautical receiving set combination 21 also is 0.78m, fills the undesired signals such as rarefaction wave that epidermis produces with the inner member and the oil of compacting random disturbance and multiple tracks digital streamer.
Like Fig. 5, be provided with prior-warning device 5 in the above-mentioned cable control module 2, this prior-warning device 5 is connected with pressure transducer 19 with the digital packets 11 interior depth transducers 18 of multiple tracks digital streamer 4.When the working current of multiple tracks digital streamer and pressure surpassed predetermined index, prior-warning device 5 was reported to the police through the stereo set of setting up in the pc main control system 1, even amateur operating personnel also can in time pinpoint the problems, and avoids unnecessary loss.
Use when of the present invention, earlier the multiple tracks digital streamer is wrapped on the winch, again pc main control computer, towing cable control module, multiple tracks digital streamer, explosive source are connected.During construction, work ship lowsteaming is slowly put into the multiple tracks digital streamer marine; The dark drag controller at the active section head and the tail two ends through the multiple tracks digital streamer; The heavy degree of depth of putting of control multiple tracks digital streamer active section adopts 10CC type high-performance nautical receiving set, cooperates dark towing cable controller to use; Can make the multiple tracks digital streamer in 300 meters operate as normal of the depth of water, can be used for military affairs.During construction operation; Digital packets converts digital signal into to the earthquake reflected wave signal that the multiple tracks digital streamer receives through the SeaMUX24 road, is transferred to the pc main control computer, is gathered and record by it; Simultaneously; Pressure in the digital packets and depth transducer can show the depth of water and hydraulic pressure in real time, and are monitored in real time by prior-warning device.
Claims (1)
1. high-precision oceanic earthquake exploration multi-channel data acquisition system; Comprise pc main control system (1); Towing cable control module (2); Explosive source (3), differential GPS (6), and by the multiple tracks digital streamer (4) of deck section (7), first stretch section (8), preceding dark drag controller (9), first active section (10), digital packets (11), tail active section (12), the dark drag controller (13) in back, tail stretch section (14), tail tag (15), joint (16) and titanium alloy joint (17) formation; Above-mentioned multiple tracks digital streamer (4) is 24 roads; And extendible high-resolution multi-channel digital marine seismic streamer for ocean seismic prospecting, first active section (10) front end and tail active section (12) rear end are respectively arranged with a heavy dark drag controller (13) of preceding dark drag controller (9) and back of putting the degree of depth of control towing cable; Respectively be provided with 12 road nautical receiving sets combinations in first active section (10) and the tail active section (12);
The per pass nautical receiving set combination (21) of above-mentioned multiple tracks digital streamer (4) has 8 groups of equidistance to amount to 18 nautical receiving sets (20), and the arrangement mode of 18 nautical receiving sets (20) in the combination of per pass nautical receiving set is 3,1 successively; 2,4,1; 2,3,2 equidistance differential weights combination; The spacing of each nautical receiving set (20) is 0.78m, and the spacing between the above-mentioned nautical receiving set combination (21) also is 0.78m;
Be provided with depth transducer (18) and pressure transducer (19) that the degree of depth and pressure when the multiple tracks digital streamer worked are monitored in real time in the above-mentioned digital packets (11);
Above-mentioned digital packets (11) is a SeaMUX24 road digital packets;
It is characterized in that being provided with in the above-mentioned towing cable control module (2) prior-warning device (5) of real-time monitoring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102315289A CN101706584B (en) | 2009-11-29 | 2009-11-29 | High-precision oceanic earthquake exploration data acquisition system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009102315289A CN101706584B (en) | 2009-11-29 | 2009-11-29 | High-precision oceanic earthquake exploration data acquisition system |
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| CN101706584A CN101706584A (en) | 2010-05-12 |
| CN101706584B true CN101706584B (en) | 2012-05-02 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104049278B (en) * | 2014-06-24 | 2017-12-12 | 国家***第一海洋研究所 | More more towing cables of focus trigger sequential control system and method |
| CN106249316A (en) * | 2016-09-07 | 2016-12-21 | 中国石油天然气集团公司 | Air gun source real-time quality monitoring method and device in a kind of marine site |
| CN106873027B (en) * | 2017-02-07 | 2019-01-04 | 国家***第一海洋研究所 | A kind of double focus wide-azimuths sea 3-D seismics detection method |
| CN106990431B (en) * | 2017-05-18 | 2023-08-15 | 国家***第一海洋研究所 | Offshore bottom hydrate detection system |
| 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 |
| CN111638554B (en) * | 2020-06-08 | 2024-04-26 | 自然资源部第一海洋研究所 | Marine seismic data receiving system and data processing method |
| WO2022047680A1 (en) * | 2020-09-02 | 2022-03-10 | 中国海洋大学 | High-precision measurement device for plasma seismic source wavelets under shallow water condition |
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