CN112130208A - Method and device for processing ghost waves in cable - Google Patents
Method and device for processing ghost waves in cable Download PDFInfo
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- CN112130208A CN112130208A CN202010917171.6A CN202010917171A CN112130208A CN 112130208 A CN112130208 A CN 112130208A CN 202010917171 A CN202010917171 A CN 202010917171A CN 112130208 A CN112130208 A CN 112130208A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000001514 detection method Methods 0.000 claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000004590 computer program Methods 0.000 claims description 13
- 230000003044 adaptive effect Effects 0.000 claims description 11
- 238000005070 sampling Methods 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 14
- 238000000926 separation method Methods 0.000 description 5
- 238000007689 inspection Methods 0.000 description 4
- 230000001629 suppression Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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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
- G01V1/28—Processing seismic data, e.g. analysis, for interpretation, for correction
- G01V1/36—Effecting static or dynamic corrections on records, e.g. correcting spread; Correlating seismic signals; Eliminating effects of unwanted energy
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/30—Noise handling
- G01V2210/32—Noise reduction
Abstract
The embodiment of the application discloses a method and a device for processing ghost waves in a cable. The method comprises the following steps: adding and combining the detection result of the water detection detector and the detection result of the land detection detector to obtain the waveform information of the effective wave; determining waveform information of ghost waves in the effective waves; and separating the ghost wave and the uplink wave in the effective wave by utilizing the waveform information of the ghost wave to obtain the waveform information of the required uplink wave.
Description
Technical Field
The present invention relates to the field of information processing, and more particularly, to a method and apparatus for processing ghost waves in a cable.
Background
Cable ghost is an interference wave that trails the primary wave in the presence of marine seismic data. The submarine cable integrates two detectors of water detection and land detection, wherein the water detection is a pressure detector and has no directivity, the land detection is a speed detector, and the received upgoing wave and the received downgoing wave have opposite polarities. Therefore, the primary waves received by the water detection and the land detection have the same polarity, the cable ghost waves have opposite polarities, and the cable ghost waves can be suppressed after the combination processing.
Fig. 1 is a waveform diagram illustrating a double detection and merging operation in the related art. As shown in figure 1, submarine cable data is based on the fact that ghost waves of the amphibious cable are opposite in polarity and combined to achieve the purpose of suppressing the ghost waves of the cable.
In practical application, due to the fact that quality difference of land and water inspection data is large, complete matching of each sampling point is difficult to achieve before combination, and cable ghost wave residues still exist in waveforms after the water inspection and the land inspection are combined.
Disclosure of Invention
In order to solve any technical problem, embodiments of the present application provide a method and an apparatus for processing ghost waves in a cable.
To achieve the purpose of the embodiments of the present application, the embodiments of the present application provide a method for processing ghost waves in a cable, including:
adding and combining the detection result of the water detection detector and the detection result of the land detection detector to obtain the waveform information of the effective wave;
determining waveform information of ghost waves in the effective waves;
and separating the ghost wave and the uplink wave in the effective wave by utilizing the waveform information of the ghost wave to obtain the waveform information of the required uplink wave.
An apparatus for processing ghost waves in a cable, comprising:
the merging module is used for adding and merging the detection result of the water detection detector and the detection result of the land detection detector to obtain the waveform information of the effective wave;
the determining module is used for determining the waveform information of ghost waves in the effective waves;
and the processing module is used for separating the ghost wave and the uplink wave in the effective wave by utilizing the waveform information of the ghost wave to obtain the waveform information of the required uplink wave.
A storage medium having a computer program stored therein, wherein the computer program is arranged to perform the method as described above when executed.
An electronic device comprising a memory having a computer program stored therein and a processor arranged to execute the computer program to perform the method as described above.
One of the above technical solutions has the following advantages or beneficial effects:
the detection result of the water detection detector and the detection result of the land detection detector are added and combined to obtain the waveform information of the effective wave, the waveform information of the ghost wave in the effective wave is determined, the ghost wave and the uplink wave in the effective wave are separated by utilizing the waveform information of the ghost wave to obtain the required waveform information of the uplink wave, two wave fields generated by double detection and combination are fully utilized, and the purpose of further suppressing the ghost wave in the cable is achieved.
Additional features and advantages of the embodiments of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the application. The objectives and other advantages of the embodiments of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the embodiments of the present application and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and together with the examples of the embodiments of the present application do not constitute a limitation of the embodiments of the present application.
FIG. 1 is a waveform diagram illustrating a double check-merge operation in the related art;
FIG. 2 is a flowchart of a method for processing ghost waves in a cable according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of an up-traveling wave and a down-traveling wave provided in an embodiment of the present application;
fig. 4(a) is a schematic diagram of an acquisition manner of an up-going wave according to an embodiment of the present application;
fig. 4(b) is a schematic diagram of an acquisition manner of a downlink wave according to an embodiment of the present application;
FIG. 5 is a schematic diagram of wavefield separation provided by an embodiment of the present application;
FIG. 6 is a diagram illustrating results of a cable residual ghost suppression method based on wave field separation according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of an apparatus for processing ghost waves in a cable according to an embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more apparent, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that, in the embodiments of the present application, features in the embodiments and the examples may be arbitrarily combined with each other without conflict.
Fig. 2 is a flowchart of a method for processing ghost waves in a cable according to an embodiment of the present application. The method shown in fig. 1, comprising:
and 203, separating the ghost wave and the uplink wave in the effective wave by using the waveform information of the ghost wave to obtain the waveform information of the required uplink wave.
According to the method provided by the embodiment of the application, the detection result of the water detection detector and the detection result of the land detection detector are added and combined to obtain the waveform information of the effective wave, the waveform information of the ghost wave in the effective wave is determined, the ghost wave and the uplink wave in the effective wave are separated by utilizing the waveform information of the ghost wave, the required waveform information of the uplink wave is obtained, two wave fields generated by double detection and combination are fully utilized, and the purpose of further suppressing the ghost wave in the cable is achieved.
The method provided by the embodiments of the present application is explained as follows:
in an exemplary embodiment, the determining waveform information of ghost waves in the effective waves includes:
and subtracting and combining the detection result of the water detector and the detection result of the land detector to obtain the downstream wave as the waveform information of the ghost wave.
Fig. 3 is a schematic diagram of an up-traveling wave and a down-traveling wave provided in an embodiment of the present application. As shown in fig. 2, the wave received by the receiver is divided into an up-going wave (corresponding to the "effective wave" in the above) which is the last received wave that has propagated up, and a down-going wave which is the last received wave that has propagated down. The primary wave is the upgoing wave, namely, the required wave is collected; the down-going wave is a cable ghost wave and is a wave to be removed.
Fig. 4(a) is a schematic diagram of an acquisition manner of an up-going wave according to an embodiment of the present application. As shown in fig. 4(a), the instrumental responses of the hydrophone and the geophone are different, the received uplink waves have the same polarity, and the downlink waves have opposite polarities, so that the downlink waves can be eliminated by the combination of the hydrophone and the geophone, and only the uplink waves are reserved.
However, the signals received by the land and water detection have large difference, matching processing needs to be performed before combination, perfect matching cannot be achieved at present, and therefore cable ghost wave residues can exist after combination.
Fig. 4(b) is a schematic diagram of an acquisition manner of the downlink wave according to the embodiment of the present application. As shown in fig. 4(b), the method provided by the embodiment of the present application breaks through the conventional solution, performs subtraction processing on the land and water to obtain a down-going wave, that is, a cable ghost, which is used as a model, removes the combined result by using an adaptive subtraction operation, and further suppresses the residual cable ghost to obtain the "required up-going wave" in the foregoing.
Wherein, the land and water subtraction operation can be that the waveform of the water detection detector is used as a subtracted number, and the land detection detector is used as a subtracted number; alternatively, the land detector is used as the subtrahend and the waveform of the water detector is used as the subtrahend.
FIG. 5 is a schematic diagram of wavefield separation provided by an embodiment of the present application. As shown in fig. 5, the up-going wave can be obtained by the land and water inspection, but part of ghost waves still remain; and subtracting the land and water detection to obtain a downlink wave, and taking the whole downlink wave as a cable ghost wave model.
In an exemplary embodiment, the separating, by using the waveform information of the ghost, the ghost and the uplink in the active wave to obtain the required uplink information includes:
according to a preset sliding time window, locally matching the waveform information of the ghost wave with the waveform information of the effective wave;
and performing adaptive subtraction on the waveform information of the effective wave and the waveform information of the ghost wave in the matched waveform area, and taking the residual waveform obtained by the subtraction as the required uplink wave information.
The self-adaptive subtraction operation in the above steps is to match the subtracted number and the subtracted number with each other and then subtract. Taking a-B as an example, a represents an upgoing wave, B represents a ghost model, B is first matched to a, and then subtracted, and a component including B in a is removed and performed in the entire waveform signal.
In an exemplary embodiment, the performing an adaptive subtraction operation on the waveform information of the significant wave and the waveform information of the ghost wave includes:
determining the sampling point positions of the waveform information of the effective wave and the waveform information of the ghost wave;
and according to the sampling point position, carrying out self-adaptive subtraction operation on the waveform information of the effective wave and the waveform information of the ghost wave to obtain the waveform information of the effective wave after the ghost wave is removed.
The subtraction based on the sampling points can improve the accuracy of the calculation result of the adaptive subtraction.
Fig. 6 is a diagram illustrating results of a cable residual ghost suppression method based on wave field separation according to an embodiment of the present application. As shown in fig. 6, ghost waves exist at the positions indicated by the arrows in the upward waves obtained by adding the detection results of the land detectors, and by acquiring the downward waves obtained by subtracting the detection results of the land detectors as a ghost model, after the adaptive subtraction operation is performed, it can be seen that the ghost waves at the positions indicated by the arrows are suppressed.
According to the method provided by the embodiment of the application, the cable residual ghost wave suppression method based on wave field separation is characterized in that the effective wave obtained in double detection and combination is called an up-going wave, the down-going wave can be obtained through reverse combination, the down-going wave is used as a ghost wave model and is subtracted from the up-going wave, and the purposes of fully utilizing signals of different wave fields and further suppressing residual cable ghost waves are achieved.
Fig. 7 is a schematic structural diagram of an apparatus for processing ghost waves in a cable according to an embodiment of the present disclosure. As shown in fig. 6, the apparatus shown in fig. 7 includes:
the merging module is used for adding and merging the detection result of the water detection detector and the detection result of the land detection detector to obtain the waveform information of the effective wave;
the determining module is used for determining the waveform information of ghost waves in the effective waves;
and the processing module is used for separating the ghost wave and the uplink wave in the effective wave by utilizing the waveform information of the ghost wave to obtain the waveform information of the required uplink wave.
In an exemplary embodiment, the determining module is specifically configured to subtract and combine a detection result of the water detector and a detection result of the land detector to obtain a down-going wave as the waveform information of the ghost wave.
In one exemplary embodiment, the processing module includes:
the matching unit is used for locally matching the waveform information of the ghost wave with the waveform information of the effective wave according to a preset sliding time window;
and the processing unit is used for executing adaptive subtraction operation on the waveform information of the effective wave and the waveform information of the ghost wave in the matched waveform area, and taking the residual waveform obtained by the subtraction operation as the required uplink wave information.
In one exemplary embodiment, the processing unit includes:
the determining subunit is used for determining the sampling point positions of the waveform information of the effective wave and the waveform information of the ghost wave;
and the processing subunit is configured to perform adaptive subtraction on the waveform information of the effective wave and the waveform information of the ghost wave according to the sampling point position, so as to obtain waveform information from which the ghost wave in the waveform information of the effective wave is removed.
The device that this application embodiment provided adds the combination to the testing result of water detection wave detector and the testing result of land detection wave detector, obtains the waveform information of active wave, confirms the waveform information of ghost in the active wave, utilizes the waveform information of ghost is right ghost in the active wave and last ripples separate, obtain the waveform information of required last ripples, make full use of two kinds of wave fields that the double check was merged and is produced, reach the purpose of ghost in the further suppression cable.
An embodiment of the present application provides a storage medium, in which a computer program is stored, wherein the computer program is configured to perform the method described in any one of the above when the computer program runs.
An embodiment of the application provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to perform the method described in any one of the above.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
Claims (10)
1. A method of processing ghost waves in a cable, comprising:
adding and combining the detection result of the water detection detector and the detection result of the land detection detector to obtain the waveform information of the effective wave;
determining waveform information of ghost waves in the effective waves;
and separating the ghost wave and the uplink wave in the effective wave by utilizing the waveform information of the ghost wave to obtain the waveform information of the required uplink wave.
2. The method of claim 1, wherein determining waveform information of ghost waves in the active wave comprises:
and subtracting and combining the detection result of the water detector and the detection result of the land detector to obtain the downstream wave as the waveform information of the ghost wave.
3. The method according to claim 1 or 2, wherein the separating the ghost and the uplink in the effective wave by using the waveform information of the ghost to obtain the desired uplink information comprises:
according to a preset sliding time window, locally matching the waveform information of the ghost wave with the waveform information of the effective wave;
and performing adaptive subtraction on the waveform information of the effective wave and the waveform information of the ghost wave in the matched waveform area, and taking the residual waveform obtained by the subtraction as the required uplink wave information.
4. The method of claim 3, wherein the performing an adaptive subtraction operation on the waveform information of the significant wave and the waveform information of the ghost wave comprises:
determining the sampling point positions of the waveform information of the effective wave and the waveform information of the ghost wave;
and according to the sampling point position, carrying out self-adaptive subtraction operation on the waveform information of the effective wave and the waveform information of the ghost wave to obtain the waveform information of the effective wave after the ghost wave is removed.
5. An apparatus for processing ghost waves in a cable, comprising:
the merging module is used for adding and merging the detection result of the water detection detector and the detection result of the land detection detector to obtain the waveform information of the effective wave;
the determining module is used for determining the waveform information of ghost waves in the effective waves;
and the processing module is used for separating the ghost wave and the uplink wave in the effective wave by utilizing the waveform information of the ghost wave to obtain the waveform information of the required uplink wave.
6. The apparatus of claim 5, wherein:
the determining module is specifically configured to subtract and combine the detection result of the water detector and the detection result of the land detector to obtain a down-going wave as the waveform information of the ghost wave.
7. The apparatus of claim 5 or 6, wherein the processing module comprises:
the matching unit is used for locally matching the waveform information of the ghost wave with the waveform information of the effective wave according to a preset sliding time window;
and the processing unit is used for executing adaptive subtraction operation on the waveform information of the effective wave and the waveform information of the ghost wave in the matched waveform area, and taking the residual waveform obtained by the subtraction operation as the required uplink wave information.
8. The apparatus of claim 7, wherein the processing unit comprises:
the determining subunit is used for determining the sampling point positions of the waveform information of the effective wave and the waveform information of the ghost wave;
and the processing subunit is configured to perform adaptive subtraction on the waveform information of the effective wave and the waveform information of the ghost wave according to the sampling point position, so as to obtain waveform information from which the ghost wave in the waveform information of the effective wave is removed.
9. A storage medium, in which a computer program is stored, wherein the computer program is arranged to perform the method of any of claims 1 to 4 when executed.
10. An electronic device comprising a memory and a processor, wherein the memory has stored therein a computer program, and wherein the processor is arranged to execute the computer program to perform the method of any of claims 1 to 4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010917171.6A CN112130208B (en) | 2020-09-03 | 2020-09-03 | Method and device for processing ghost waves in cable |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010917171.6A CN112130208B (en) | 2020-09-03 | 2020-09-03 | Method and device for processing ghost waves in cable |
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| CN112130208B CN112130208B (en) | 2024-02-06 |
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| CN107884829A (en) * | 2017-12-06 | 2018-04-06 | 东华理工大学 | A kind of method for combining compacting shallow sea OBC Multiple Attenuation in Seismic Data |
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- 2020-09-03 CN CN202010917171.6A patent/CN112130208B/en active Active
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| CN109143363A (en) * | 2017-06-19 | 2019-01-04 | 中国石油化工股份有限公司 | The double inspection acquisition ghost reflection drawing methods of marine streamer and system |
| CN109581507A (en) * | 2017-09-28 | 2019-04-05 | 中国石油化工股份有限公司 | The acquisition data merging method of cable up and down and system based on Green's function |
| CN107884829A (en) * | 2017-12-06 | 2018-04-06 | 东华理工大学 | A kind of method for combining compacting shallow sea OBC Multiple Attenuation in Seismic Data |
| CN108363096A (en) * | 2018-02-01 | 2018-08-03 | 中国石油天然气集团有限公司 | A kind of land and water detector seismic data uplink and downlink wave field separation method and device |
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| Title |
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