CN103135130A - Marine ladder-shaped cable earthquake receiving method - Google Patents
Marine ladder-shaped cable earthquake receiving method Download PDFInfo
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- CN103135130A CN103135130A CN2013100354266A CN201310035426A CN103135130A CN 103135130 A CN103135130 A CN 103135130A CN 2013100354266 A CN2013100354266 A CN 2013100354266A CN 201310035426 A CN201310035426 A CN 201310035426A CN 103135130 A CN103135130 A CN 103135130A
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Abstract
The invention provides a marine ladder-shaped cable earthquake receiving method. The method comprises: a whole first cable is divided into a first part cable, a second part cable and a third part cable according to the depth of an offshore exploration target layer, wherein the first part cable, the second part cable and the third part cable are different in lengths; the first part cable, the second part cable and the third part cable are respectively immersed below the sea level in three different depths; and two adjacent cables of the first part cable, the second part cable and the third part cable are respectively connected through a second cable with the length of 300 meters. The immersing depth of the first part cable is larger than or equal to that of an earthquake focus array, the immersing depth of the second part cable is larger than that of the first part cable, and the immersing depth of the third part cable is larger than that of the second part cable. Earthquake receiving is conducted by the method, and original earthquake data which are sufficient in low frequency and wide in frequency band can be obtained under the condition that a simulation manner is fixed.
Description
Technical field
The present invention relates to a kind of ocean stepped appearance cable earthquake method of reseptance.
Background technology
Along with the global economy development, the whole world is more and more stronger to the demand of petroleum-based energy, and Chinese Economy Development is occupied more and more critical role in development of world economy.China is petroleum-based energy reserves big countries, is also that petroleum-based energy consumes big country.Along with onshore oil field is continually developed, the inland petroleum resources are fewer and feweri.The marine oil energy development also belongs to the primary stage, and particularly disputed area, the South Sea is demanded exploitation urgently.Country has dropped into a large amount of manpower and financial resources to offshore survey.The petroleum prospecting target also becomes increasingly complex, and deep water is moved towards in offshore prospecting, by the underground shallow layer exploration, is transitioned into gradually the mid-deep strata exploration.Tradition Determing The Length method of seismic prospecting can't satisfy the geological research accuracy requirement that day by day improves, and closes implementing lithologic map especially, portrays the geologic objectives such as low amplitude structure, and the offshore seismic exploration technology has been proposed new challenge.Offshore survey is with respect to the land exploration, and drilling cost is higher, and the earthquake-capturing cost is relatively low.
The marine seismic acquisition technology mainly is divided into shooting techniques and reception technique two large divisions.When focus (shooting techniques) when exciting, energy passes through seawater, propagate to earth formation deep through the seabed, part energy is propagated downwards along the stratum, part energy is upwards propagated along the stratum, by seawater, be converted into seismic signal and received by the loading geophone cable (reception technique) of sinking in certain depth.The seismic signal effective frequency composition that receives is abundanter, and frequency span is wider, and the seismic data original quality is higher, and namely seismic signal resolution is higher.
Conventional marine streamer collection, whole cable (reception technique) sinking is the same degree of depth under water, namely waits floating shape, as shown in Figure 1.In focus capacity and the certain situation of the sinking degree of depth thereof (being generally 4 meters～15 meters), its far-field wavelet frequency span is certain.When the cable sinking was more shallow, frequency band was relatively wide, but its low frequency end energy is lower, and the seismic event penetration capacity is relatively poor, was unfavorable for the mid-deep strata exploration.When the cable sinking degree of depth is darker, the frequency band relative narrower, but it lacks radio-frequency component, is unfavorable for that shallow-layer improves resolution.At mode of excitation one regularly, be difficult to obtain the original seismic data of low frequency abundance, bandwidth.
Summary of the invention
In order to solve technological deficiency described above, the invention provides a kind of ocean stepped appearance cable earthquake method of reseptance, its purpose is, in the situation that mode of excitation is certain, obtains the original seismic data of low frequency abundance, bandwidth.
For achieving the above object, the present invention takes following technical scheme:
A kind of stepped appearance cable earthquake method of reseptance is applied to seafari, and the method comprises:
According to the offshore survey zone of interest degree of depth, whole the first cable is divided into three parts, be respectively first's cable, second portion cable and third part cable;
With first's cable, second portion cable and three the different degree of depth of third part cable difference sinking under the sea level;
Link by the second cable between adjacent two cables in first's cable, second portion cable and third part cable.
Preferably, the focus array sinking degree of depth is h
0, the sinking degree of depth of first's cable is h
1, h
0Be less than or equal to h
1
Preferably, h
0=3～9 meters, h
1=3～9 meters.
The sinking degree of depth of the second portion cable that preferably, is connected with the first cable is h
2, h
2Greater than h
1, the sinking degree of depth of the third part cable that is connected with the second portion cable is h
3, h
3Greater than h
2
Preferably, h
2=2h
1, h
3=2h
2
Preferably, the length of first's cable, second portion cable and third part cable is all not identical.
Preferably, the length of the second cable is 300 meters.
The present invention is owing to taking above-described technical scheme, and it comprises following advantage: satisfy shallow, in, the different explorations of deep layer are to the demands of seismic data original quality, and save prospecting prime cost.
Description of drawings
Accompanying drawing in this explanation is used to provide a further understanding of the present invention, consists of the application's a part, and exemplary embodiment of the present invention and explanation thereof are used for explaining the present invention, are not construed as limiting the invention; In the accompanying drawings:
Fig. 1 is the schematic diagram of normal cable earthquake method of reseptance;
Fig. 2 is the schematic diagram according to stepped appearance cable earthquake method of reseptance in ocean of the present invention.
Embodiment
In order to make technical scheme of the present invention clearer, below in conjunction with the drawings and specific embodiments, the present invention is done further elaborating.Need to prove, in the situation that do not conflict, embodiment and the variety of way in embodiment in the application can make up mutually.
A kind of ocean stepped appearance cable earthquake method of reseptance, the method can comprise:
According to the difference of the offshore survey zone of interest degree of depth, whole cable can be divided into three parts, be respectively first's cable, second portion cable and third part cable; Can be with first's cable, second portion cable and three the different degree of depth of third part cable difference sinking under the sea level; Can be the second cable link of 300 meters by length between adjacent two cables in first's cable, second portion cable and third part cable, the length of the second cable can be adjusted as required; Wherein the length of first's cable, second portion cable and third part cable can be all not identical, can be all identical yet.
Alternatively, the focus array sinking degree of depth can be h
0=3～9 meters, the sinking degree of depth of first's cable can be h
1=3～9 meters, the sinking degree of depth h of first's cable
1Can be more than or equal to focus array sinking degree of depth h
0The sinking degree of depth of the second portion cable that is connected with the first cable is h
2, the sinking degree of depth of the third part cable that is connected with the second portion cable is h
3, h
3Can be greater than h
2And h
2Can be greater than h
1
Alternatively, in the application's a embodiment, optimal parameter is set to h
3=2h
2And h
2=2h
1
Alternatively, the second cable also can be used as seismic trace and receives cable.
Method of the present invention can be in the situation that mode of excitation be certain, obtains that low frequency is sufficient, the original seismic data of bandwidth, satisfy shallow, in, the different explorations of deep layer are to the demands of seismic data original quality.
The above embodiment is only preferred embodiment of the present invention, is not for limiting protection scope of the present invention, and those skilled in the art can deliberately carry out various modifications and variations to the present invention and without departing from the spirit and scope of the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of claim of the present invention and equivalent technologies thereof, the present invention also is intended to comprise these modifications and modification interior.
Claims (7)
1. a stepped appearance cable earthquake method of reseptance, be applied to seafari, and described method comprises:
According to the offshore survey zone of interest degree of depth, whole the first cable is divided into three parts, be respectively first's cable, second portion cable and third part cable;
With described first cable, second portion cable and three the different degree of depth of third part cable difference sinking under the sea level;
Link by the second cable between adjacent two cables in described first cable, second portion cable and third part cable.
2. method according to claim 1, wherein,
The focus array sinking degree of depth is h
0, the sinking degree of depth of first's cable is h
1, h
0Be less than or equal to h
1
3. method according to claim 2, wherein,
h
0=3～9 meters, h
1=3～9 meters.
4. method according to claim 3, wherein,
The sinking degree of depth of the second portion cable that is connected with described first cable is h
2, h
2Greater than h
1, the sinking degree of depth of the third part cable that is connected with described second portion cable is h
3, h
3Greater than h
2
5. method according to claim 4, wherein,
h
2＝2h
1，h
3＝2h
2。
6. the described method of any one according to claim 1 to 5, wherein,
The length of described first cable, second portion cable and third part cable is all not identical.
7. method according to claim 6, wherein,
The length of described the second cable is 300 meters.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310035426.6A CN103135130B (en) | 2013-01-30 | 2013-01-30 | Marine ladder-shaped cable earthquake receiving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310035426.6A CN103135130B (en) | 2013-01-30 | 2013-01-30 | Marine ladder-shaped cable earthquake receiving method |
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| Publication Number | Publication Date |
|---|---|
| CN103135130A true CN103135130A (en) | 2013-06-05 |
| CN103135130B CN103135130B (en) | 2015-06-24 |
Family
ID=48495209
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107390272A (en) * | 2017-07-10 | 2017-11-24 | 中国海洋石油总公司 | A kind of seismic receiver system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101652678A (en) * | 2007-02-24 | 2010-02-17 | 格库技术有限公司 | Marine seismic acquisition method and system |
| CN102455441A (en) * | 2010-10-14 | 2012-05-16 | 地球物理维里达斯集团公司 | Method and device to acquire seismic data |
| US20120320711A1 (en) * | 2011-06-16 | 2012-12-20 | CGGVeritas Services (U.S.) Inc. | Method and device for marine seismic acquisition |
-
2013
- 2013-01-30 CN CN201310035426.6A patent/CN103135130B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101652678A (en) * | 2007-02-24 | 2010-02-17 | 格库技术有限公司 | Marine seismic acquisition method and system |
| CN102455441A (en) * | 2010-10-14 | 2012-05-16 | 地球物理维里达斯集团公司 | Method and device to acquire seismic data |
| US20120320711A1 (en) * | 2011-06-16 | 2012-12-20 | CGGVeritas Services (U.S.) Inc. | Method and device for marine seismic acquisition |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107390272A (en) * | 2017-07-10 | 2017-11-24 | 中国海洋石油总公司 | A kind of seismic receiver system |
| CN107390272B (en) * | 2017-07-10 | 2019-09-13 | 中国海洋石油集团有限公司 | A kind of seismic receiver system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103135130B (en) | 2015-06-24 |
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: China Oilfield Services Limited Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: China Oilfield Services Limited Patentee before: China National Offshore Oil Corporation |
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