CN112255681B - Method and device for processing vibroseis frequency-reducing scanning data - Google Patents
Method and device for processing vibroseis frequency-reducing scanning data Download PDFInfo
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- G01V1/32—Transforming one recording into another or one representation into another
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- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
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Abstract
The invention provides a method and a device for processing vibroseis frequency-reducing scanning data, wherein the method comprises the following steps: acquiring single shot seismic record data which are scanned simultaneously by the frequency rising and the frequency falling of a controllable seismic source and are not mutually correlated and corresponding frequency-falling scanning signals; respectively performing time sequence inversion on the single shot seismic record data and the corresponding down-conversion scanning signals which are not mutually related and are scanned simultaneously by the controlled seismic source up-conversion and down-conversion, so as to obtain time sequence inverted intermediate data and corresponding scanning signals; cross-correlating the time sequence inverted intermediate data with corresponding scanning signals to obtain inverted seismic single shot record data; and performing time sequence recovery on the inverted seismic single shot record data to obtain the vibroseis frequency-reducing scanning seismic single shot record. The device is used for executing the method. The method and the device for processing the vibroseis frequency-reducing scanning data improve the signal-to-noise ratio of the data.
Description
Technical Field
The invention relates to the technical field of seismic data processing, in particular to a method and a device for processing vibroseis frequency-reducing scanning data.
Background
With the continuous promotion of green exploration, the controllable seismic source gradually becomes a direction for greatly popularizing application in the future. Under the large situation of low oil and gas exploration, the acquisition efficiency of the controllable seismic source is improved, and the economic benefit of acquisition projects is further improved, so that the method is also an important content for popularizing the controllable seismic source to be researched.
At present, in the earthquake acquisition of the controllable earthquake focus, one of important factors influencing the production efficiency is the scanning time of the controllable earthquake focus, and in order to improve the production efficiency, new technologies such as random scanning, sectional simultaneous scanning, lifting frequency simultaneous scanning and the like continuously appear in recent years and greatly improve the production efficiency. In the prior art, no matter what kind of scanning signal is adopted, the original single shot record is obtained by cross-correlating the scanning signal with the signal received by the earthquake instrument, the method is feasible for the frequency-increasing scanning signal, but for the frequency-decreasing scanning signal, the original single shot record is obtained by conventional cross-correlation to generate related noise, and the data signal to noise ratio is reduced.
Therefore, how to provide a method for processing the vibroseis downscan scan data to improve the signal-to-noise ratio of the data is an important issue to be solved in the art.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention provides a method and a device for processing the vibroseis frequency-reducing scanning data, which can at least partially solve the problems in the prior art.
In one aspect, the invention provides a method for processing vibroseis frequency-reducing scanning data, which comprises the following steps:
Acquiring single shot seismic record data which are scanned simultaneously by the frequency rising and the frequency falling of a controllable seismic source and are not mutually correlated and corresponding frequency-falling scanning signals;
Respectively performing time sequence inversion on the single shot seismic record data and the corresponding down-conversion scanning signals which are not mutually related and are scanned simultaneously by the controlled seismic source up-conversion and down-conversion, so as to obtain time sequence inverted intermediate data and corresponding scanning signals;
cross-correlating the time sequence inverted intermediate data with corresponding scanning signals to obtain inverted seismic single shot record data;
And performing time sequence recovery on the inverted seismic single shot record data to obtain the vibroseis frequency-reducing scanning seismic single shot record.
In another aspect, the present invention provides a vibroseis downscan scan data processing apparatus, comprising:
the acquisition unit is used for acquiring single shot seismic record data which are scanned simultaneously by the frequency rising and the frequency falling of the uncorrelated controllable seismic sources and corresponding frequency-falling scanning signals;
The time sequence inversion unit is used for respectively performing time sequence inversion on the single-shot seismic record data and the corresponding down-conversion scanning signals which are scanned simultaneously by the non-cross-correlated controllable seismic source in an ascending and descending way to obtain time sequence inverted intermediate data and corresponding scanning signals;
The cross-correlation unit is used for carrying out cross-correlation on the time sequence inverted intermediate data and the corresponding scanning signals to obtain inverted seismic single shot record data;
And the time sequence recovery unit is used for performing time sequence recovery on the inverted seismic single shot record data to obtain the seismic single shot record of the controlled source frequency-reducing scanning.
In yet another aspect, the present invention provides an electronic device including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method for vibroseis downscan data processing of any of the above embodiments when the program is executed.
In yet another aspect, the present invention provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method for vibroseis downscanning data according to any of the above embodiments.
According to the method and the device for processing the vibroseis frequency-reducing scanning data, single shot seismic record data and corresponding frequency-reducing scanning signals of which the frequency-increasing and frequency-reducing are not mutually related are obtained, the single shot seismic record data and the corresponding frequency-reducing scanning signals of which the frequency-increasing and frequency-reducing are not mutually related are respectively subjected to time sequence inversion, time sequence inverted intermediate data and corresponding scanning signals are obtained, the time sequence inverted intermediate data and the corresponding scanning signals are mutually related, inverted seismic single shot record data are obtained, time sequence recovery is carried out on the inverted seismic single shot record data, the frequency-reducing scanning seismic single shot record of the vibroseis obtained, relevant noise is reduced or eliminated, and the signal to noise ratio of the data is improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. In the drawings:
FIG. 1 is a flow chart of a method for processing vibroseis downscan data according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a vibroseis frequency-reducing scanning data processing device according to an embodiment of the present invention.
Fig. 3 is a schematic physical structure of an electronic device according to an embodiment of the invention.
Detailed Description
For the purpose of making 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 further detail with reference to the accompanying drawings. The exemplary embodiments of the present application and their descriptions herein are for the purpose of explaining the present application, but are not to be construed as limiting the application. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be arbitrarily combined with each other.
In order to facilitate understanding of the technical scheme provided by the application, the following description will explain relevant contents of the technical scheme of the application.
From the principle of vibroseis excitation, seismic recordings are obtained using mathematical correlations. The correlation is to perform a cross-correlation operation with the vibration record by using the reference scanning signal. The purpose of the vibroseis related is to compress a sweep signal of very long duration into a limited bandwidth pulse signal of very short duration. The correlation process will manifest the harmonics generated by the excitation, resulting in correlated noise in the correlation data.
For up-sweep, the starting point locations where harmonics occur in the recording are:
The end point positions where harmonics occur in the recording are:
Where k is the harmonic number, f B is the start scanning frequency, f E is the end scanning frequency, and T is the scanning signal length.
For the downscan scan, the corresponding start-stop times are-t B(fE) and-t E(kfB), respectively).
In the vibroseis correlation, the output correlation record only remains for a time period of positive time shift. According to the formula, the fact that the harmonic wave appears on the negative axis of the relevant recording time after the uncorrelated data are correlated with the up-conversion scanning signal, namely, the fact that the uncorrelated data are out of the single shot recording; the harmonics of the uncorrelated data, after being correlated with the downsampled scan signal, appear in the positive axis of the correlated recording time, i.e., within the single shot record.
In practice, up-conversion scanning is generally used, because after the obtained relevant recorded data, harmonic interference occurs outside the single shot record, and no relevant noise exists inside the single shot record. However, in actual production, the down-conversion scanning is sometimes used, for example, when the controllable seismic source lifting frequency synchronous excitation technology is adopted for acquisition, the obtained down-conversion scanning record generates relevant noise after being related to a down-conversion signal, and the signal-to-noise ratio of data is reduced. In order to reduce or eliminate relevant noise after the correlation of the down-conversion scanning records, the embodiment of the invention provides a method for processing down-conversion scanning data of a controllable seismic source. The implementation main body of the controllable source frequency-reducing scanning data processing method provided by the embodiment of the invention comprises, but is not limited to, a computer.
Fig. 1 is a flow chart of a method for processing vibroseis frequency-reducing scan data according to an embodiment of the present invention, as shown in fig. 1, where the method for processing vibroseis frequency-reducing scan data according to the embodiment of the present invention includes:
s101, acquiring single shot seismic record data which are scanned simultaneously by the up-conversion and down-conversion of a controllable seismic source without cross correlation and corresponding down-conversion scanning signals;
Specifically, pre-correlation data can be obtained through field acquisition, and single shot seismic record data and corresponding down-conversion scanning signals which are not mutually correlated and are scanned simultaneously by the up-conversion and down-conversion of the controllable seismic source can be obtained from the pre-correlation data. Wherein the pre-correlation data may be recorded by a seismic instrument.
S102, respectively performing time sequence inversion on the single shot seismic record data and the corresponding down-conversion scanning signals which are not mutually related and are scanned simultaneously by the up-conversion and the down-conversion of the controllable seismic source, and obtaining time sequence inverted intermediate data and corresponding scanning signals;
Specifically, after the single shot seismic record data and the corresponding down-conversion scanning signals of the up-conversion and down-conversion simultaneous scanning of the uncorrelated controllable seismic source are obtained, the single shot seismic record data of the up-conversion and down-conversion simultaneous scanning of the uncorrelated controllable seismic source are subjected to time sequence inversion to obtain time sequence inverted intermediate data, and the down-conversion scanning signals of the single shot seismic record data of the up-conversion and down-conversion simultaneous scanning of the uncorrelated controllable seismic source are subjected to time sequence inversion to obtain time sequence inverted down-conversion scanning signals, wherein the down-conversion scanning signals become up-conversion scanning signals after the time sequence inversion. The time-sequence inverted down-conversion scanning signal corresponds to the time-sequence inverted intermediate data and becomes a scanning signal corresponding to the time-sequence inverted intermediate data.
For example, if the down-conversion scanning signal of a work area is 84-3Hz, the up-conversion scanning signal after the time sequence inversion is 3-84Hz.
S103, cross-correlating the intermediate data with the corresponding scanning signals to obtain inverted seismic single shot record data;
Specifically, after the time sequence inverted intermediate data and the corresponding scanning signals are obtained, correlation operation is carried out on the time sequence inverted intermediate data and the corresponding scanning signals to obtain inverted seismic single shot record data, which is equivalent to carrying out correlation operation on single shot seismic record data which are not mutually correlated and up-conversion scanning signals, and according to the correlation characteristics of up-conversion signal harmonic waves, the correlated harmonic waves cannot appear in the seismic record data, so that the influence of the harmonic waves on the correlated data is eliminated, and the signal to noise ratio of the data is improved. The specific process of the correlation operation is the prior art, and details are not described here.
S104, performing time sequence recovery on the inverted seismic single shot record data to obtain the vibroseis frequency-reducing scanning seismic single shot record.
Specifically, after the inverted seismic single shot record data is obtained, the time sequence of the non-cross-correlated single shot record data is inverted, so that the obtained time sequence of the inverted seismic single shot record data is also inverted, the time sequence of the inverted seismic single shot record data is inverted, and the original time sequence is recovered, so that the vibroseis frequency-reducing scanning seismic single shot record can be obtained.
According to the method for processing the vibroseis frequency-reducing scanning data, single shot seismic record data and corresponding frequency-reducing scanning signals of which the frequency-reducing and frequency-reducing are not mutually related are obtained, time sequence inversion is respectively carried out on the single shot seismic record data and the corresponding frequency-reducing scanning signals of which the frequency-reducing and frequency-reducing are not mutually related, time sequence inversion intermediate data and corresponding scanning signals are obtained, cross correlation is carried out on the time sequence inversion intermediate data and the corresponding scanning signals, inverted seismic single shot record data is obtained, time sequence recovery is carried out on the inverted seismic single shot record data, the frequency-reducing scanning seismic single shot record of the vibroseis is obtained, relevant noise is reduced or eliminated, and the signal to noise ratio of the data is improved.
On the basis of the above embodiments, further, the single shot seismic record data of the simultaneous scanning of the frequency up and down of the non-correlated vibroseis is obtained through pre-correlation data, and the pre-correlation data is obtained through the simultaneous scanning of the frequency up and down of the vibroseis and directly recording of the received seismic signals by the seismic instrument.
Specifically, when the seismic data is collected in the field, the controllable seismic source frequency-raising and frequency-lowering are scanned simultaneously to mix and excite the seismic signals, the seismic instrument does not perform relevant processing on the received seismic signals, the received seismic signals are directly recorded, and relevant pre-data can be obtained. And obtaining single shot seismic record data of simultaneous scanning of the frequency rising and the frequency falling of the uncorrelated controllable seismic sources from the pre-correlation data, wherein the data are superposition results of the frequency rising seismic record and the frequency falling seismic record.
For example, when seismic data is collected in the field, two groups of controllable seismic sources with short intervals are separated, one group adopts linear frequency-raising and the other group adopts linear frequency-lowering mode to excite, the seismic instrument can directly record the received seismic signals, and single shot seismic record data of which the frequency-raising and frequency-lowering simultaneous scanning of the uncorrelated controllable seismic sources can be obtained.
Further, based on the above embodiments, the seismic signals are generated by source excitation in different sweep modes.
Specifically, according to the conditions of the work area and the test results, the start-stop frequency of the scanning signal of the work area is determined. The initial low frequency and the final high frequency of the scanning signal are fixed, the up-conversion signal adopts an up-conversion scanning mode, the down-conversion signal adopts a down-conversion scanning mode, if the initial frequency of a work area is 3Hz and the final frequency is 84Hz, the up-conversion signal is 3-84Hz up-conversion scanning excitation, and the down-conversion signal is 84-3Hz down-conversion scanning excitation. The earthquake signals received by the earthquake instrument can be excited by two groups of controllable earthquake sources, one group is excited by an ascending frequency signal, and the other group is excited by a descending frequency signal, so that the field construction efficiency can be improved, and the acquisition efficiency of the earthquake signals is further improved.
For example, the number of source groups allocated according to the project is divided into two groups, one group adopts up-conversion scanning and the other group adopts down-conversion scanning. If 4 groups of seismic sources are arranged in a certain project, 2 groups of seismic sources are excited by using an up-conversion signal, and the other two groups of seismic sources are excited by using a down-conversion signal, so that the field construction efficiency can be improved to the greatest extent.
Further, based on the above embodiments, the seismic sources of the different scanning modes are synchronously excited.
Specifically, when the seismic signals are collected in the field, the seismic sources in different scanning modes can be synchronously excited, so that the collection efficiency of the seismic signals is improved.
For example, in the field of seismic signal acquisition, two sets of seismic sources with short time intervals are acquired, one set is in a linear frequency-up mode, and the other set is in a linear frequency-down mode and excited simultaneously. Because the two scanning signals are basically uncorrelated, the two groups of seismic sources have small mutual interference, and the acquisition efficiency of the seismic signals can be improved by approximately 1 time on the premise of not increasing acquisition equipment.
According to the method for processing the vibroseis downscan data, the time sequence of the downscan uncorrelated record and the time sequence of the downscan signal are inversely related, which is equivalent to the correlation of the uncorrelated record and the upscaled signal, and after the correlation, the harmonic wave can not appear in the record, so that the influence of the harmonic wave on the data is eliminated, and the signal to noise ratio of the data is improved.
Fig. 2 is a schematic structural diagram of a vibroseis frequency-reducing scan data processing apparatus according to an embodiment of the present invention, and as shown in fig. 2, the vibroseis frequency-reducing scan data processing apparatus according to an embodiment of the present invention includes an obtaining unit 201, a time sequence inversion unit 202, a cross-correlation unit 203, and a time sequence recovery unit 204, where:
The acquisition unit 201 is used for acquiring single shot seismic record data which are scanned by the up-conversion and down-conversion of the uncorrelated controllable seismic sources and corresponding down-conversion scanning signals; the time sequence inversion unit 202 is configured to perform time sequence inversion on the single shot seismic record data and the corresponding down-conversion scanning signal that are scanned simultaneously by the non-correlated controllable seismic source, so as to obtain time sequence inverted intermediate data and the corresponding scanning signal; the cross-correlation unit 203 is configured to cross-correlate the time-sequence inverted intermediate data and the corresponding scanning signal to obtain inverted seismic single shot record data; the time sequence recovery unit 204 is used for performing time sequence recovery on the inverted seismic single shot record data to obtain the seismic single shot record of the controlled source frequency-reducing scanning.
Specifically, the pre-correlation data may be obtained through field acquisition, and the acquiring unit 201 may obtain, from the pre-correlation data, single shot seismic record data that is scanned by simultaneous frequency up and frequency down of the uncorrelated vibroseis and a corresponding frequency down scanning signal. Wherein the pre-correlation data may be recorded by a seismic instrument.
After the single shot seismic record data and the corresponding down-conversion scanning signal of the up-conversion and down-conversion simultaneous scanning of the non-cross-correlated controllable seismic source are obtained, the time sequence inversion unit 202 performs time sequence inversion on the single shot seismic record data of the up-conversion and down-conversion simultaneous scanning of the non-cross-correlated controllable seismic source to obtain time sequence inverted intermediate data, and performs time sequence inversion on the down-conversion scanning signal corresponding to the single shot seismic record data of the up-conversion and down-conversion simultaneous scanning of the non-cross-correlated controllable seismic source to obtain time sequence inverted down-conversion scanning signal, wherein the down-conversion scanning signal becomes the up-conversion scanning signal after time sequence inversion. The time-sequence inverted down-conversion scanning signal corresponds to the time-sequence inverted intermediate data and becomes a scanning signal corresponding to the time-sequence inverted intermediate data.
After obtaining the intermediate data with inverted time sequence and the corresponding scanning signals, the cross-correlation unit 203 performs a correlation operation on the intermediate data with inverted time sequence and the corresponding scanning signals to obtain inverted seismic single shot record data, which is equivalent to performing a correlation operation on single shot seismic record data which is not cross-correlated and up-converted scanning signals, according to the correlation characteristics of the up-converted signal harmonic, the correlated harmonic will not appear in the seismic record data, thus eliminating the influence of the harmonic on the correlated data and improving the signal to noise ratio of the data. The specific process of the correlation operation is the prior art, and details are not described here.
After the inverted seismic single shot record data is obtained, the time sequence of the non-cross-correlated single shot seismic record data is inverted, so that the obtained time sequence of the inverted seismic single shot record data is inverted, and the time sequence recovery unit 204 inverts the time sequence of the inverted seismic single shot record data and recovers the original time sequence, so that the vibroseis frequency-down scanning seismic single shot record can be obtained.
According to the vibroseis frequency-reducing scanning data processing device provided by the embodiment of the invention, the single shot seismic record data and the corresponding frequency-reducing scanning signals of the non-cross-correlated vibroseis frequency-increasing and frequency-reducing simultaneous scanning are obtained, the single shot seismic record data and the corresponding frequency-reducing scanning signals of the non-cross-correlated vibroseis frequency-increasing and frequency-reducing simultaneous scanning are respectively subjected to time sequence inversion to obtain time sequence inverted intermediate data and corresponding scanning signals, the time sequence inverted intermediate data and the corresponding scanning signals are subjected to cross-correlation to obtain inverted seismic single shot record data, the inverted seismic single shot record data is subjected to time sequence recovery to obtain the vibroseis frequency-reducing scanning seismic single shot record, the related noise is reduced or eliminated, and the signal to noise ratio of the data is improved.
On the basis of the above embodiments, further, the single shot seismic record data of the simultaneous scanning of the frequency up and down of the non-correlated vibroseis is obtained through pre-correlation data, and the pre-correlation data is obtained through the simultaneous scanning of the frequency up and down of the vibroseis and directly recording of the received seismic signals by the seismic instrument.
Specifically, when the seismic data is collected in the field, the controllable seismic source frequency-raising and frequency-lowering are scanned simultaneously to mix and excite the seismic signals, the seismic instrument does not perform relevant processing on the received seismic signals, the received seismic signals are directly recorded, and relevant pre-data can be obtained. And acquiring single shot seismic record data of simultaneous scanning of the frequency rising and the frequency falling of the uncorrelated controllable seismic sources from the pre-correlation data, wherein the data are superposition results of the frequency rising seismic record and the frequency falling seismic record.
Further, based on the above embodiments, the seismic signals are generated by source excitation in different sweep modes.
Specifically, according to the conditions of the work area and the test results, the start-stop frequency of the scanning signal of the work area is determined. The initial low frequency and the final high frequency of the scanning signal are fixed, the up-conversion signal adopts an up-conversion scanning mode, the down-conversion signal adopts a down-conversion scanning mode, if the initial frequency of a work area is 3Hz and the final frequency is 84Hz, the up-conversion signal is 3-84Hz up-conversion scanning excitation, and the down-conversion signal is 84-3Hz down-conversion scanning excitation. The earthquake signals received by the earthquake instrument can be excited by two groups of controllable earthquake sources, one group is excited by an ascending frequency signal, and the other group is excited by a descending frequency signal, so that the field construction efficiency can be improved, and the acquisition efficiency of the earthquake signals is further improved.
Further, based on the above embodiments, the seismic sources of the different scanning modes are synchronously excited.
Specifically, when the seismic signals are collected in the field, the seismic sources in different scanning modes can be synchronously excited, so that the collection efficiency of the seismic signals is improved.
The embodiment of the apparatus provided in the embodiment of the present invention may be specifically used to execute the processing flow of each method embodiment, and the functions thereof are not described herein again, and may refer to the detailed description of the method embodiments.
Fig. 3 is a schematic physical structure of an electronic device according to an embodiment of the present invention, as shown in fig. 3, the electronic device may include: processor 301, communication interface (Communications Interface) 302, memory 303, and communication bus 304, wherein processor 301, communication interface 302, and memory 303 communicate with each other via communication bus 304. The processor 301 may call logic instructions in the memory 303 to perform the following method: acquiring single shot seismic record data which are scanned simultaneously by the frequency rising and the frequency falling of a controllable seismic source and are not mutually correlated and corresponding frequency-falling scanning signals; respectively performing time sequence inversion on the single shot seismic record data and the corresponding down-conversion scanning signals which are not mutually related and are scanned simultaneously by the controlled seismic source up-conversion and down-conversion, so as to obtain time sequence inverted intermediate data and corresponding scanning signals; cross-correlating the time sequence inverted intermediate data with corresponding scanning signals to obtain inverted seismic single shot record data; and performing time sequence recovery on the inverted seismic single shot record data to obtain the vibroseis frequency-reducing scanning seismic single shot record.
Further, the logic instructions in the memory 303 may be implemented in the form of software functional units and stored in a computer readable storage medium when sold or used as a stand alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The present embodiment discloses a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, are capable of performing the methods provided by the above-described method embodiments, for example comprising: acquiring single shot seismic record data which are scanned simultaneously by the frequency rising and the frequency falling of a controllable seismic source and are not mutually correlated and corresponding frequency-falling scanning signals; respectively performing time sequence inversion on the single shot seismic record data and the corresponding down-conversion scanning signals which are not mutually related and are scanned simultaneously by the controlled seismic source up-conversion and down-conversion, so as to obtain time sequence inverted intermediate data and corresponding scanning signals; cross-correlating the time sequence inverted intermediate data with corresponding scanning signals to obtain inverted seismic single shot record data; and performing time sequence recovery on the inverted seismic single shot record data to obtain the vibroseis frequency-reducing scanning seismic single shot record.
The present embodiment provides a computer-readable storage medium storing a computer program that causes the computer to execute the methods provided by the above-described method embodiments, for example, including: acquiring single shot seismic record data which are scanned simultaneously by the frequency rising and the frequency falling of a controllable seismic source and are not mutually correlated and corresponding frequency-falling scanning signals; respectively performing time sequence inversion on the single shot seismic record data and the corresponding down-conversion scanning signals which are not mutually related and are scanned simultaneously by the controlled seismic source up-conversion and down-conversion, so as to obtain time sequence inverted intermediate data and corresponding scanning signals; cross-correlating the time sequence inverted intermediate data with corresponding scanning signals to obtain inverted seismic single shot record data; and performing time sequence recovery on the inverted seismic single shot record data to obtain the vibroseis frequency-reducing scanning seismic single shot record.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In the description of the present specification, reference to the terms "one embodiment," "one particular embodiment," "some embodiments," "for example," "an example," "a particular example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. A controllable source frequency-reducing scanning data processing method is characterized by comprising the following steps:
Acquiring single shot seismic record data which are scanned simultaneously by the frequency rising and the frequency falling of a controllable seismic source and are not mutually correlated and corresponding frequency-falling scanning signals;
Respectively performing time sequence inversion on the single shot seismic record data and the corresponding down-conversion scanning signals which are not mutually related and are scanned simultaneously by the controlled seismic source up-conversion and down-conversion, so as to obtain time sequence inverted intermediate data and corresponding scanning signals;
cross-correlating the time sequence inverted intermediate data with corresponding scanning signals to obtain inverted seismic single shot record data;
And performing time sequence recovery on the inverted seismic single shot record data to obtain the vibroseis frequency-reducing scanning seismic single shot record.
2. The method of claim 1, wherein the single shot seismic record data of the simultaneous uncorrelated vibroseis upscales and downscales is obtained from pre-correlation data obtained by simultaneous vibroseis upscales and downscales and directly recording the received seismic signals by a seismic instrument.
3. The method of claim 2, wherein the seismic signals are generated by source excitation in different sweeps.
4. A method according to claim 3, wherein the sources of the different sweeps are excited simultaneously.
5. A vibroseis downscan sweep data processing apparatus comprising:
the acquisition unit is used for acquiring single shot seismic record data which are scanned simultaneously by the frequency rising and the frequency falling of the uncorrelated controllable seismic sources and corresponding frequency-falling scanning signals;
The time sequence inversion unit is used for respectively performing time sequence inversion on the single-shot seismic record data and the corresponding down-conversion scanning signals which are scanned simultaneously by the non-cross-correlated controllable seismic source in an ascending and descending way to obtain time sequence inverted intermediate data and corresponding scanning signals;
The cross-correlation unit is used for carrying out cross-correlation on the time sequence inverted intermediate data and the corresponding scanning signals to obtain inverted seismic single shot record data;
And the time sequence recovery unit is used for performing time sequence recovery on the inverted seismic single shot record data to obtain the seismic single shot record of the controlled source frequency-reducing scanning.
6. The apparatus of claim 5, wherein the single shot seismic record data of the simultaneous uncorrelated vibroseis upscales and downscales is obtained from pre-correlation data obtained by simultaneous vibroseis upscales and downscales and directly recording the received seismic signals by a seismic instrument.
7. The apparatus of claim 6, wherein the seismic signals are generated by source excitation in different sweeps.
8. The apparatus of claim 7, wherein the sources of different sweeps are excited simultaneously.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method of any of claims 1 to 4 when the computer program is executed.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method according to any one of claims 1 to 4.
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