CN201508415U - Multi-channel Digital Streamer for High Resolution Marine Seismic Exploration - Google Patents
Multi-channel Digital Streamer for High Resolution Marine Seismic Exploration Download PDFInfo
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- CN201508415U CN201508415U CN2009202273065U CN200920227306U CN201508415U CN 201508415 U CN201508415 U CN 201508415U CN 2009202273065 U CN2009202273065 U CN 2009202273065U CN 200920227306 U CN200920227306 U CN 200920227306U CN 201508415 U CN201508415 U CN 201508415U
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Abstract
一种高分辨率海洋地震勘探多道数字拖缆。包括甲板段与钛合金接头连接的首弹性段、前深拖控制器、含12道水听器组合的首工作段、连接首、尾工作段的24道对地震信号进行数模转换的数字包、含12道水听器组合的尾工作段、后深拖控制器、尾弹性段、尾标及在拖缆内部的多组电缆，其特征是上述首工作段前端及尾工作段后端分别设置有一个控制拖缆沉放深度的前深拖控制器和后深拖控制器。上述数字包内设有深度传感器和压力传感器。上述的每道的水听器组合有8组共计18个水听器，且等距不等权组合。拖缆达水深300m时仍可正常工作；空间分辨率高，时间采样率高，接收信号的频带宽：5Hz-8kHz；探测深度可达水深大于千米时对海底沉积地层大于千米的探测。
A multi-channel digital streamer for high-resolution marine seismic exploration. Including the first elastic section connecting the deck section with the titanium alloy joint, the front deep towing controller, the first working section including 12 hydrophone combinations, and the digital package for digital-to-analog conversion of seismic signals by 24 channels connecting the first and aft working sections , the tail working section containing 12 hydrophone combinations, the rear deep drag controller, the tail elastic section, the tail label and multiple groups of cables inside the tow cable, which is characterized in that the front end of the first working section and the rear end of the tail working section are respectively A front deep tow controller and a rear deep tow controller are provided to control the sinking depth of the towline. The above digital package houses a depth sensor and a pressure sensor. The above-mentioned hydrophone combination for each channel has 8 groups of 18 hydrophones in total, and the combinations are equidistant and unequal weighted. The towline can still work normally when the water depth is 300m; the spatial resolution is high, the time sampling rate is high, and the frequency bandwidth of the received signal is 5Hz-8kHz; the detection depth can reach the detection of seabed sedimentary strata greater than 1,000 meters when the water depth is greater than 1,000 meters.
Description
Technical field
The towing cable that uses when the utility model relates to geophysical survey, particularly a kind of high-resolution multi-channel digital marine seismic streamer for ocean seismic prospecting.
Background technology
Ocean seismic exploration haulage cable is one of important component part of offshore shooting.At present, domestic multichannel seismic exploration receives cable and is dummycable, needs external equipment could realize digitized sampling.Nautical receiving set in the towing cable distributes and mostly is 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 sinking degree of depth during at present domestic all towing cables work 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.At present, external multichannel seismic exploration receives cable and has now realized digitizing, and resolution also can reach the requirement of high resolving power offshore shooting, but because its construction cost is very high, can't satisfy domestic actual demand.
Summary of the invention
The purpose of this utility model provides a kind of high-resolution multi-channel digital marine seismic streamer for ocean seismic prospecting, to remedy the deficiencies in the prior art.
The utility model comprises successively and being divided into: 24 roads of the first stretch section that deck section is connected with the titanium alloy joint, preceding dark drag controller, the first active section that contains the combination of 12 road nautical receiving sets, connection initial and end active section carry out the digital packets of digital-to-analog conversion, the dark drag controller in tail active section, back that contains 12 road nautical receiving sets combinations, tail stretch section, tail tag and at many groups cable of towing cable inside, it is characterized in that above-mentioned first active section front end and tail active section rear end are respectively arranged with the dark drag controller of preceding dark drag controller and back of a control towing cable sinking degree of depth seismic signal.
The combination of the nautical receiving set of above-mentioned per pass has equidistant 8 groups 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 3,1,2,4 successively, 1,2,3,2 equidistant differential weights combination, and the spacing of every group of nautical receiving set combination is 0.78m.Spacing between the above-mentioned nautical receiving set combination also is 0.78m.
Above-mentioned digital packets is a SeaMUX24 road digital packets, and above-mentioned digital packets built-in is provided with depth transducer and pressure transducer that degree of depth when towing cable worked and pressure are monitored in real time.
Advantage of the present utility model: a. realizes digital-to-analog conversion on towing cable, really become the digitizing towing cable, makes towing cable can reach the expansion of main road number under corresponding sampling rate; When b. the sinking degree of depth reaches depth of water 300m, but towing cable operate as normal still; C. adopt the 6.25m small distance between receivers to arrange, improved spatial resolution greatly; D. time-sampling rate height, its sampling rate be up to 1/16ms, but and the scope general election majority of sampling rate reach: 1/16ms, 1/8ms, 1/4ms, 1/2ms, 1ms, 2ms, 4ms; E. digital packets is optional to signal programmable-gain value: 0dB, 12dB, 24dB, 36dB, 42dB; F. the bandwidth of received signal: 5Hz-8kHz; G. 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.
Description of drawings
Fig. 1 is a general structure synoptic diagram of the present utility model.
Fig. 2 is a digital packets structural representation of the present utility model.
Fig. 3 is a nautical receiving set combination mode synoptic diagram of the present utility model.
Wherein, 1 deck section, 2 first stretch sections, 3 preceding dark drag controllers, 4 first active sections, 5 digital packets, 6 tail active sections, the dark drag controller in 7 backs, 8 tail stretch sections, 9 tail tags, 10 water joints, 11 titanium alloy joints, 12 depth transducers, 13 pressure transducers, 14 nautical receiving sets, the combination of 15 nautical receiving sets.
Embodiment
As Fig. 1, the utility model comprises successively and being divided into: the first stretch section 2 that deck section 1 is connected with titanium alloy joint 11, the dark drag controller 3 of front end, first active section 4, SeaMUX24 road digital packets 5, tail active section 6, terminal dark drag controller 7, tail stretch section 8, towing cable end and the many groups cable that is arranged on towing cable inside, along towing cable head, the 24 road nautical receiving set combinations that tail active section length direction sets gradually, connect first, 24 roads of tail active section are to the digital packets that seismic signal carries out digital-to-analog conversion, it is characterized in that above-mentioned first active section 4 front ends and tail active section 6 rear ends are respectively arranged with a maintenance level when making towing cable work and the dark drag controller 7 of preceding dark drag controller 3 and back of the control towing cable sinking degree of depth in real time.
As Fig. 3, be provided with depth transducer 12 and pressure transducer 13 that degree of depth when towing cable worked and pressure are monitored in real time in the above-mentioned digital packets 5, and the nautical receiving set of the utility model per pass combination 15 adopts 18 nautical receiving sets, the arrangement mode of 18 nautical receiving sets 14 in the per pass nautical receiving set combination 15 is 3 successively, 1,2,4,1,2,3,2 equidistant differential weights combination, between every group or the interval S of the nautical receiving set of per pass combination be 0.78m.
Depth transducer (12) and pressure transducer (13) that degree of depth when above-mentioned digital packets (5) built-in is provided with towing cable worked and pressure are monitored in real time.
Be used to connect the safety that towing cable and acquisition system are carried out the signal transmission and powered for towing cable, the front end of deck section 1 is provided with a water joint 10.
Deck section 1 of the present utility model is 150m at least, and first stretch section 2 is 25m at least, preceding dark drag controller 3, and first active section 4 is 75m at least, SeaMUX24 road digital packets 5, tail active section 6 is 75m at least, the dark drag controller 7 in back, tail stretch section 8 is 25m and tail tag 9 at least.Between deck section 1 and the first stretch section 2 and tail stretch section 6 ends have titanium alloy joint 11 to be connected.Dark drag controller 3 before being provided with between first stretch section 2 and the first active section 4 is connected by SeaMUX24 road digital packets 5 between the drag controller 7 deeply after being provided with between tail active section 6 and the tail stretch section 8, first active section 4 and tail active section 6.Be equipped with 12 road nautical receiving sets combinations in first active section 3 and the tail active section 6.
Fig. 2 is the structural representation of the utility model digital packets, adopted up-to-date 5 pairs of seismic signals of SeaMUX24 road digital packets to carry out digital-to-analog conversion, connect first active section 4 and tail active section 6, and depth transducer 12 and pressure transducer 13 that degree of depth when towing cable worked and pressure are monitored in real time in this digital packets, have been set up, the degree of depth and pressure when towing cable is worked are monitored in real time, better guarantee the accuracy of the safety and the image data of towing cable.
Fig. 3 is the utility model nautical receiving set combination mode synoptic diagram, the per pass hydrophone, group has amounted to 18 nautical receiving sets 14, and the arrangement mode of per pass nautical receiving set combination 15 is 3,1,2,4,1,2,3,2 equidistant differential weights combination, the interval S of every group of nautical receiving set combination is 0.78m, with the inner member of compacting random disturbance and towing cable and the undesired signals such as rarefaction wave of the skin-deep interaction generation of oily ST Stuffing Table.
When using the utility model,, and be connected with signal receiver as long as this towing cable is wrapped on the winch.During construction, work ship lowsteaming, cable is slowly put into marine, the dark drag controller at the active section head and the tail two ends by towing cable, the active section sinking degree of depth of control towing cable, but the maximum sinking is to 1000 meters of the depth of waters, adopt 10CC type high-performance nautical receiving set, cooperate dark towing cable controller to use, can make towing cable, can be used for military affairs in 300 meters operate as normal of the depth of water.During construction operation, the earthquake reflected wave signal that towing cable receives is converted to digital signal through SeaMUX24 road digital packets, is transferred to the receiving record instrument, gather and record by it, simultaneously, pressure in the digital packets and depth transducer are to show the depth of water and hydraulic pressure in real time on receiving instrument.
Claims (5)
1. high-resolution multi-channel digital marine seismic streamer for ocean seismic prospecting, this towing cable comprises the first stretch section (2) that deck section (1) is connected with titanium alloy joint (11) successively, preceding dark drag controller (3), the first active section (4) that contains 12 road nautical receiving set combinations (15), connect first, tail active section (4,6) 24 roads carry out the digital packets (5) of digital-to-analog conversion to seismic signal, the tail active section (6) that contains 12 road nautical receiving set combinations (15), the dark drag controller (7) in back, tail stretch section (8), many groups cable in tail tag (9) and the towing cable is characterized in that above-mentioned first active section (4) front end and tail active section (6) rear end are respectively arranged with the dark drag controller (7) of preceding dark drag controller (3) and back of a control towing cable sinking degree of depth.
2. high-resolution multi-channel digital marine seismic streamer for ocean seismic prospecting as claimed in claim 1, the nautical receiving set combination (15) that it is characterized in that above-mentioned per pass has 18 nautical receiving sets (14), the arrangement mode of 18 nautical receiving sets (14) in the per pass nautical receiving set combination (15) is 3 successively, 1,2,4,1,2,3,2 equidistant differential weights combination.
3. high-resolution multi-channel digital marine seismic streamer for ocean seismic prospecting as claimed in claim 1 is characterized in that between the above-mentioned nautical receiving set combination (15) or the spacing between the nautical receiving set (14) is all 0.78m.
4. high-resolution multi-channel digital marine seismic streamer for ocean seismic prospecting as claimed in claim 1 is characterized in that being provided with in the above-mentioned digital packets (5) depth transducer (12) and pressure transducer (13) that degree of depth when towing cable worked and pressure are monitored in real time.
5. high-resolution multi-channel digital marine seismic streamer for ocean seismic prospecting as claimed in claim 1 is characterized in that the front end of above-mentioned deck section (1) is provided with a water joint (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202273065U CN201508415U (en) | 2009-09-24 | 2009-09-24 | Multi-channel Digital Streamer for High Resolution Marine Seismic Exploration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202273065U CN201508415U (en) | 2009-09-24 | 2009-09-24 | Multi-channel Digital Streamer for High Resolution Marine Seismic Exploration |
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| Publication Number | Publication Date |
|---|---|
| CN201508415U true CN201508415U (en) | 2010-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009202273065U Expired - Fee Related CN201508415U (en) | 2009-09-24 | 2009-09-24 | Multi-channel Digital Streamer for High Resolution Marine Seismic Exploration |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101661113B (en) * | 2009-09-24 | 2011-07-20 | 中国海洋大学 | High-resolution multi-channel digital marine seismic streamer for ocean seismic prospecting |
| CN105022032A (en) * | 2015-07-08 | 2015-11-04 | 中国人民解放军91388部队 | Long baseline navigation positioning system absolute array measurement distance measurement correction method |
| CN108027449A (en) * | 2015-07-07 | 2018-05-11 | 离子地球物理学公司 | Earthquake node through traction |
-
2009
- 2009-09-24 CN CN2009202273065U patent/CN201508415U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101661113B (en) * | 2009-09-24 | 2011-07-20 | 中国海洋大学 | High-resolution multi-channel digital marine seismic streamer for ocean seismic prospecting |
| CN108027449A (en) * | 2015-07-07 | 2018-05-11 | 离子地球物理学公司 | Earthquake node through traction |
| CN108027449B (en) * | 2015-07-07 | 2020-11-10 | 离子地球物理学公司 | Towed seismic node |
| US11163077B2 (en) | 2015-07-07 | 2021-11-02 | Ion Geophysical Corporation | Towed seismic node |
| CN105022032A (en) * | 2015-07-08 | 2015-11-04 | 中国人民解放军91388部队 | Long baseline navigation positioning system absolute array measurement distance measurement correction method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100616 Termination date: 20120924 |