CN112327360B - Method, device, computer storage medium and terminal for realizing noise processing - Google Patents
Method, device, computer storage medium and terminal for realizing noise processing Download PDFInfo
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Abstract
In the embodiment of the invention, a second noise model which does not contain the effective signal of the longitudinal component of the land detection is obtained by removing the effective signal of the longitudinal component of the land detection contained in the first noise model of the converted wave in the longitudinal component of the land detection, the noise attenuation processing of the longitudinal component of the land detection is realized through the obtained second noise model, and the signal to noise ratio of the longitudinal component of the land detection is improved.
Description
Technical Field
This document relates to, but is not limited to, marine exploration techniques, and more particularly, to a method, apparatus, computer storage medium, and terminal for performing noise processing.
Background
Currently, submarine cable double detection is an effective method for acquiring seismic data, and comprises seismic data acquired through a water detection component (referred to as a P component for short) and a land detection component (the land detection component comprises an X-axis component, a Y-axis component and a Z-axis component, wherein the land detection Z-axis component is also referred to as a land detection longitudinal component, the three components are referred to as a land detection X component, a land detection Y component and a land detection Z component respectively, and the land detection X component, the land detection Y component and the land detection Z component are three signals simultaneously received by a land detection detector of a submarine cable, wherein the vibration direction of a particle is parallel to the propagation direction and is a land detection Z component, the vibration direction of the particle is perpendicular to the propagation direction, the vibration direction of the particle is parallel to a test line and is a land detection X component, and the vibration direction of the particle is perpendicular to the propagation direction and is a land detection Y component perpendicular to the test line).
During data acquisition of submarine cable double detection, a detector is required to be placed on the seabed, the seabed is complex, and the detector is difficult to be vertically coupled with the seabed, so land detection X components and land detection Y components leak into land detection longitudinal components, converted waves of the land detection X components (longitudinal waves or transverse waves obliquely enter an elastic interface, and generated reflected transverse waves, reflected longitudinal waves, transmitted transverse waves and/or transmitted longitudinal waves) and converted waves of the land detection Y components leak into the land detection longitudinal components become noise of the submarine cable double detection, and the noise needs to be eliminated.
In the related technology, converted waves of a land detection X component and a land detection Y component leaked into a land detection longitudinal component are generally regarded as low-speed linear noise, noise attenuation is mainly carried out through Radon (Radon) conversion or frequency-wave number domain (F-K) conversion, and if the converted waves are completely attenuated in the mode, effective signals of the land detection longitudinal component are also attenuated; however, if the attenuation strength is not sufficient, the non-linear part of the in-phase axis of the converted wave (the in-phase axis is the connection line of the extreme values (peaks or troughs) with the same vibration phase of each track on the seismic data (signals)), especially the non-linear part at the top of the in-phase axis waveform, cannot realize complete attenuation, and therefore, the land detection longitudinal component meeting the signal-to-noise ratio requirement cannot be obtained.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
The embodiment of the invention provides a method and a device for realizing noise processing, a computer storage medium and a terminal, which can improve the signal-to-noise ratio of a longitudinal component of a land detection.
The embodiment of the invention provides a method for realizing noise processing, which comprises the following steps:
determining a first noise model of converted waves in the longitudinal component of the land detection according to the water detection component corresponding to the longitudinal component of the land detection;
rejecting effective signals of the land survey longitudinal component contained in the first noise model to obtain a second noise model of converted waves;
and eliminating a second noise model contained in the longitudinal component of the ground detection to obtain the longitudinal component of the ground detection which finishes noise attenuation.
In an exemplary embodiment, prior to the determining the first noise model of the converted wave in the longitudinal component of the continental examination, the method further comprises:
sorting the water survey component and the land survey longitudinal component into a co-survey gather;
and determining the water detection component corresponding to the longitudinal component of the land detection according to the common detection wave point gather obtained by sorting.
In an exemplary embodiment, the determining the first noise model of the converted wave in the longitudinal component of the land detection comprises:
correcting the seismic wave information of the water detection component corresponding to the longitudinal component of the land detection;
and adaptively subtracting the corrected water detection component corresponding to the longitudinal terrestrial component from the longitudinal terrestrial component to obtain the first noise model.
In one exemplary embodiment, the adaptively subtracting the land detection longitudinal component from the corrected water detection component corresponding to the land detection longitudinal component itself comprises:
adaptively subtracting the corrected water detection component corresponding to the longitudinal terrestrial detection component by the longitudinal terrestrial detection component through a preset first algorithm;
wherein the first algorithm comprises: least square subtraction in time-space domain or adaptive subtraction in curvelet domain.
In an exemplary embodiment, the correcting the seismic information for the hydrophobe component corresponding to the longitudinal terrestrial component comprises:
correcting the water detection component corresponding to the longitudinal terrestrial component by taking the seismic wave information of the longitudinal terrestrial component as a matching target so as to match the corrected water detection component with the seismic wave information of the longitudinal terrestrial component;
wherein the seismic wave information matching comprises: the corrected water detection component and the land detection longitudinal component are: the difference value during traveling is smaller than a preset difference value threshold value, the amplitude belongs to the same value interval, the phase difference value is smaller than a preset phase threshold value, and the frequency difference value is smaller than a preset frequency threshold value.
In an exemplary embodiment, the correcting the water detection component corresponding to the longitudinal terrestrial component comprises:
correcting the seismic wave information by a preset second algorithm for the water detection component corresponding to the longitudinal component of the land detection; wherein the second algorithm comprises: least square subtraction in time-space domain or adaptive subtraction in curvelet domain.
In an exemplary embodiment, the rejecting the valid signals of the longitudinal component of the land detection included in the first noise model comprises:
and according to the apparent velocity difference between the first noise model and the longitudinal component of the land detection, rejecting effective signals of the longitudinal component of the land detection contained in the first noise model.
In an exemplary embodiment, the rejecting the second noise model included in the longitudinal component of the land survey comprises:
adaptively subtracting the second noise model from the ground-check longitudinal component.
In an exemplary embodiment, said adaptively subtracting said second noise model from said longitudinal component of said continental inspection comprises: adaptively subtracting the second noise model from the longitudinal component of the land detection through a preset third algorithm;
wherein the third algorithm comprises: least square subtraction in time-space domain or adaptive subtraction in curvelet domain.
On the other hand, an embodiment of the present invention further provides a computer storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program implements the above method for implementing noise processing.
In another aspect, an embodiment of the present invention further provides a terminal, including: a memory and a processor, the memory having a computer program stored therein; wherein,
the processor is configured to execute the computer program in the memory;
the computer program, when executed by the processor, implements a method of implementing noise processing as described above.
In another aspect, an embodiment of the present invention further provides an apparatus for implementing noise processing, where the apparatus includes: determining a model unit, a rejection unit and a processing unit; wherein,
the determination model unit is arranged to: determining a first noise model of converted waves in the longitudinal component of the land detection according to the water detection component corresponding to the longitudinal component of the land detection;
the eliminating unit is arranged as follows: removing effective signals of the longitudinal components of the land detection contained in the first noise model to obtain a second noise model of the converted wave;
the processing unit is configured to: and eliminating a second noise model contained in the longitudinal component of the land detection to obtain the longitudinal component of the land detection with noise attenuation completed.
In the embodiment of the invention, the effective signals of the land detection longitudinal component contained in the first noise model of the converted wave in the determined land detection longitudinal component are removed to obtain the second noise model of the effective signals without the land detection longitudinal component, the noise attenuation processing of the land detection longitudinal component is realized through the obtained second noise model, and the signal to noise ratio of the obtained land detection longitudinal component is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will 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 present invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and are not intended to limit the invention.
FIG. 1 is a flow chart of a method of implementing noise processing according to an embodiment of the present invention;
fig. 2 is a block diagram of an apparatus for implementing noise processing according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
Fig. 1 is a flowchart of a method for implementing noise processing according to an embodiment of the present invention, as shown in fig. 1, including:
in an exemplary embodiment, step 101 of the present invention further includes:
sorting the water detection component and the land detection longitudinal component into a common detection wave point gather;
and determining a water detection component corresponding to the longitudinal component of the land detection according to the common detection wave point gather obtained by sorting.
It should be noted that how the water detection component and the ground detection longitudinal component are sorted into a common detector point gather (common receiver point gather) can be implemented by those skilled in the art with reference to the related art; the common detection wave point channels are centralized, and the water detection component and the land detection longitudinal component are arranged in sequence; one skilled in the art can determine the water detection component corresponding to each land detection longitudinal component according to the arrangement order of the common detection point channel set.
In one illustrative example, an embodiment of the present invention determines a first noise model of a converted wave in a longitudinal component of a continental survey, comprising:
correcting seismic wave information of the water detection component corresponding to the longitudinal component of the land detection;
and adaptively subtracting the corrected water detection component corresponding to the longitudinal component of the land detection from the longitudinal component of the land detection to obtain a first noise model.
In an illustrative example, seismic wave information in embodiments of the invention includes one or any combination of the following: travel time, amplitude, frequency, and phase.
It should be noted that, the adaptive subtraction mainly refers to: the processing operations performed by the least square subtraction in the time-space domain, the least square subtraction in the curvelet domain, and the like are well known to those skilled in the art, and are not described herein again.
In one illustrative example, the method for correcting seismic wave information of the water detection component corresponding to the longitudinal component of the land detection comprises the following steps:
the method comprises the steps that seismic wave information of longitudinal components of the land detection is used as a matching target, and water detection components corresponding to the longitudinal components of the land detection are corrected, so that the corrected water detection components are matched with the seismic wave information of the longitudinal components of the land detection;
the seismic wave information matching comprises the following steps: the corrected water detection component and the land detection longitudinal component are as follows: the difference value during traveling is smaller than a preset difference value threshold value, the amplitudes belong to the same value interval, the phase difference value is smaller than a preset phase threshold value, and the frequency difference value is smaller than a preset frequency threshold value. In other words, the matching of the seismic information of the corrected water detection component and the land detection longitudinal component comprises: when the corrected water detection component and the land detection longitudinal component have the same or similar travel, the corrected water detection component and the land detection longitudinal component have the same or similar amplitude range; have the same or similar phase and have the same or similar frequency. When the time difference, amplitude range, phase and frequency are close in the embodiments of the present invention, the allowable difference values can be set by those skilled in the art based on experience.
In one illustrative example, an embodiment of the present invention corrects a water detection component corresponding to a longitudinal component of a continental survey, comprising:
correcting the seismic wave information of the water detection component corresponding to the longitudinal component of the land detection through a preset second algorithm; wherein the second algorithm comprises: least square subtraction in time-space domain or adaptive subtraction in curvelet domain.
It should be noted that the correction of the seismic wave information by the second algorithm is a processing method commonly used by those skilled in the art, and is not described herein.
In one illustrative example, an embodiment of the present invention adaptively subtracts a corrected water detection component corresponding to the longitudinal component of the continental examination itself from the longitudinal component of the continental examination, comprising:
adaptively subtracting the corrected water detection component corresponding to the longitudinal terrestrial component by the longitudinal terrestrial component through a preset first algorithm;
wherein the first algorithm comprises: least square subtraction in time-space domain or adaptive subtraction in curvelet domain.
It should be noted that, the adaptive subtraction of the components by the first algorithm is a conventional technical means for those skilled in the art, and is not described herein in detail.
102, removing effective signals of the longitudinal components of the land detection contained in the first noise model to obtain a second noise model of the converted wave;
in an illustrative example, the method for rejecting the effective signal of the longitudinal component of the ground detection contained in the first noise model comprises the following steps:
and according to the apparent velocity difference between the first noise model and the land detection longitudinal component, rejecting effective signals of the land detection longitudinal component contained in the first noise model.
In an illustrative example, embodiments of the invention may implement the removal processing of the effective signal of the longitudinal component of the land detection included in the first noise model by functions included in algorithms including Radon transform and frequency-wavenumber domain (F-K) transform.
And 103, eliminating a second noise model contained in the longitudinal component of the land detection to obtain the longitudinal component of the land detection with noise attenuation completed.
In an illustrative example, an embodiment of the present invention rejects a second noise model included in the longitudinal component of the land detection, comprising:
the second noise model is adaptively subtracted from the longitudinal component of the land survey.
In one illustrative example, an embodiment of the present invention adaptively subtracts a second noise model from a longitudinal component of a continental examination, comprising: adaptively subtracting a second noise model from the longitudinal component of the land detection through a preset third algorithm; wherein the third algorithm comprises: least square subtraction in time-space domain or adaptive subtraction in curvelet domain.
It should be noted that, the adaptive subtraction of the components by the third algorithm is a conventional technical means for those skilled in the art, and is not described herein again.
In the embodiment of the invention, the second noise model of the effective signal without the land detection longitudinal component is obtained by removing the effective signal of the land detection longitudinal component contained in the first noise model of the converted wave in the determined land detection longitudinal component, the noise attenuation processing of the land detection longitudinal component is realized through the obtained second noise model, and the signal-to-noise ratio of the obtained land detection longitudinal component is improved.
The embodiment of the invention also provides a computer storage medium, wherein a computer program is stored in the computer storage medium, and when being executed by a processor, the computer program realizes the method for realizing the noise processing.
An embodiment of the present invention further provides a terminal, including: a memory and a processor, the memory having stored therein a computer program; wherein,
the processor is configured to execute the computer program in the memory;
the computer program, when executed by a processor, implements a method of implementing noise processing as described above.
Fig. 2 is a block diagram of a device for implementing noise processing according to an embodiment of the present invention, as shown in fig. 2, including: determining a model unit, a rejection unit and a processing unit; wherein,
the determination model unit is arranged to: determining a first noise model of converted waves in the longitudinal component of the land detection according to the water detection component corresponding to the longitudinal component of the land detection;
the eliminating unit is arranged as follows: removing effective signals of the longitudinal components of the land detection contained in the first noise model to obtain a second noise model of the converted wave;
the processing unit is configured to: and eliminating a second noise model contained in the longitudinal component of the ground detection to obtain the longitudinal component of the ground detection which finishes noise attenuation.
In the embodiment of the invention, the second noise model of the effective signal without the land detection longitudinal component is obtained by removing the effective signal of the land detection longitudinal component contained in the first noise model of the converted wave in the determined land detection longitudinal component, the noise attenuation processing of the land detection longitudinal component is realized through the obtained second noise model, and the signal-to-noise ratio of the obtained land detection longitudinal component is improved.
In an exemplary embodiment, the apparatus of the present invention further includes a sorting unit and a correspondence determining unit; wherein,
the sorting unit is configured as follows: sorting the water detection component and the land detection longitudinal component into a common detection wave point gather; (ii) a
The determination correspondence unit is set to: and determining a water detection component corresponding to the longitudinal component of the land detection according to the common detection wave point gather obtained by sorting.
In an illustrative example, embodiments of the present invention determine that a model element is set to:
correcting seismic wave information of the water detection component corresponding to the longitudinal component of the land detection;
and adaptively subtracting the corrected water detection component corresponding to the longitudinal component of the land detection from the longitudinal component of the land detection to obtain a first noise model.
In an exemplary embodiment, the rejecting unit in the embodiment of the present invention is configured to:
and according to the apparent velocity difference between the first noise model and the longitudinal component of the land detection, removing effective signals of the longitudinal component of the land detection contained in the first noise model.
In an illustrative example, the processing unit in the embodiment of the present invention is configured to:
the second noise model is adaptively subtracted from the longitudinal component of the land survey.
In an illustrative example, the processing unit in the embodiment of the present invention is configured to:
adaptively subtracting a second noise model from the longitudinal component of the land detection through a preset third algorithm;
wherein the third algorithm comprises: least square subtraction in time-space domain or adaptive subtraction in curvelet domain.
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, or 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 skilled 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 (11)
1. A method of implementing noise processing, comprising:
determining a first noise model of a converted wave in the longitudinal terrestrial component based on the longitudinal terrestrial component, comprising:
correcting the seismic wave information of the water detection component corresponding to the longitudinal component of the land detection;
adaptively subtracting the corrected water detection component corresponding to the longitudinal terrestrial detection component from the longitudinal terrestrial detection component to obtain the first noise model;
rejecting effective signals of the land survey longitudinal component contained in the first noise model to obtain a second noise model of converted waves;
and eliminating a second noise model contained in the longitudinal component of the ground detection to obtain the longitudinal component of the ground detection which finishes noise attenuation.
2. The method of claim 1, wherein prior to determining the first noise model of the converted wave in the longitudinal component of the continental survey, the method further comprises:
sorting the water test component and the land test longitudinal component into a common detector gather;
and determining the water detection component corresponding to the longitudinal component of the land detection according to the common detection wave point gather obtained by sorting.
3. The method of claim 1, wherein adaptively subtracting the land detection longitudinal component from a corrected water detection component corresponding to the land detection longitudinal component itself comprises:
adaptively subtracting the corrected water detection component corresponding to the longitudinal terrestrial detection component by the longitudinal terrestrial detection component through a preset first algorithm;
wherein the first algorithm comprises: least square subtraction in time-space domain or adaptive subtraction in curvelet domain.
4. The method of claim 1, wherein the correcting seismic information for the hydrophobe component corresponding to the longitudinal terrestrial component comprises:
correcting the water detection component corresponding to the longitudinal terrestrial component by taking the seismic wave information of the longitudinal terrestrial component as a matching target so as to match the corrected water detection component with the seismic wave information of the longitudinal terrestrial component;
wherein the seismic wave information matching comprises: the corrected water detection component and the land detection longitudinal component are: the difference value during traveling is smaller than a preset difference value threshold value, the amplitudes belong to the same value interval, the phase difference value is smaller than a preset phase threshold value, and the frequency difference value is smaller than a preset frequency threshold value.
5. The method of claim 4, wherein said correcting the water detection component corresponding to the longitudinal component of the land detection comprises:
correcting the seismic wave information of the water detection component corresponding to the longitudinal component of the land detection through a preset second algorithm; wherein the second algorithm comprises: least square subtraction in time-space domain or adaptive subtraction in curvelet domain.
6. The method according to any one of claims 1 to 5, wherein the removing the effective signal of the longitudinal component of the land detection included in the first noise model comprises:
and according to the apparent velocity difference between the first noise model and the longitudinal component of the land detection, rejecting effective signals of the longitudinal component of the land detection contained in the first noise model.
7. The method according to any one of claims 1 to 5, wherein said rejecting the second noise model included in the longitudinal component of the land detection comprises:
adaptively subtracting the second noise model from the ground-level longitudinal component.
8. The method of claim 7, wherein the adaptively subtracting the second noise model from the longitudinal component of the land survey comprises: adaptively subtracting the second noise model from the longitudinal component of the land detection through a preset third algorithm;
wherein the third algorithm comprises: least square subtraction in time-space domain or adaptive subtraction in curvelet domain.
9. A computer storage medium having stored thereon a computer program which, when executed by a processor, implements a method of implementing noise processing as claimed in any one of claims 1 to 8.
10. A terminal, comprising: a memory and a processor, the memory having a computer program stored therein; wherein,
the processor is configured to execute the computer program in the memory;
the computer program, when executed by the processor, implements a method of implementing noise processing as claimed in any one of claims 1 to 8.
11. An apparatus that implements noise processing, comprising: determining a model unit, a rejection unit and a processing unit; wherein,
the determination model unit is arranged to: determining a first noise model of a converted wave in the longitudinal terrestrial component from the horizontal component corresponding to the longitudinal terrestrial component, comprising:
correcting seismic wave information of the water detection component corresponding to the longitudinal component of the land detection;
adaptively subtracting the corrected water detection component corresponding to the longitudinal terrestrial component from the longitudinal terrestrial component to obtain the first noise model;
the rejecting unit is arranged as follows: removing effective signals of the longitudinal components of the land detection contained in the first noise model to obtain a second noise model of the converted wave;
the processing unit is configured to: and eliminating a second noise model contained in the longitudinal component of the land detection to obtain the longitudinal component of the land detection with noise attenuation completed.
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