An aliasing artillery jamming suppression method, system, storage medium and device

Abstract

The application provides an aliasing shot interference suppression method, system, storage medium and equipment, and belongs to the field of geophysical exploration. The method comprises the following steps: step 1, picking up the aliasing shot interference take-off time; step 2, common receiver point gather random noise attenuation; and step 3, shot gather linear noise suppression. The application is applied to land and ocean high-density and high-efficiency data acquisition processing, eliminates aliasing interference caused by short shot interval, and greatly improves the signal-to-noise ratio of deep strata.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of geophysical exploration, and particularly relates to a mixed overlap shot interference suppression method, system, storage medium and equipment. BACKGROUND

[0002] With the gradual deepening of exploration and development, the requirement for a seismic observation system is higher and higher, and high-density small bin seismic acquisition has become a current mainstream trend, however, this acquisition mode has a greater impact on a cycle, so generally, a high-efficiency (shortening a shot interval) mode is adopted to implement, and mixed overlap shot interference is inevitably generated by this mode, which mainly shows the influence of a previous shot on a next shot shallow layer and the influence of the next shot on the previous shot deep layer, and the mixed overlap shot interference seriously affects the signal-to-noise ratio of seismic data.

[0003] At present, most of the researches on the mixed overlap shot interference are based on three-dimensional transformation, such as three-dimensional f-x-y and three-dimensional tau-p, and this kind of method has a higher requirement for the regularity of an observation system sampling and has a lower calculation efficiency, and in actual application, the influence on the cycle is greater. How to quickly and efficiently suppress the mixed overlap interference effectively becomes a difficult problem in current actual production application. SUMMARY

[0004] The application aims to solve the problems in the prior art, and provides a mixed overlap shot interference suppression method, system, storage medium and equipment, which is applied to land and marine high-density high-efficiency acquisition data processing, eliminates the mixed overlap interference caused by a short shot interval, and greatly improves the signal-to-noise ratio of deep strata.

[0005] One of the purposes of the application is to provide a mixed overlap shot interference suppression method.

[0006] The second purpose of the application is to provide a mixed overlap shot interference suppression system.

[0007] The third purpose of the application is to provide a computer readable storage medium.

[0008] The fourth purpose of the application is to provide a computer device.

[0009] The application is achieved by the following technical solutions:

[0010] In a first aspect, the application provides a mixed overlap shot interference suppression method, which comprises the following steps:

[0011] Step 1, picking up mixed overlap shot interference take-off time;

[0012] Step 2, common receiver point gather random noise attenuation;

[0013] Step 3, shot gather linear noise suppression.

[0014] A further improvement of the present invention is that:

[0015] The specific operations for picking up the aliasing interference take-off time in step 1 include:

[0016] Linear dynamic correction is performed on the seismic shot gather, and the energy ratio method is used to automatically pick up the aliasing shot interference start time. The picked up aliasing shot interference start time is then subjected to inverse linear dynamic correction.

[0017] A further improvement of the present invention is that:

[0018] Step 2, which involves attenuating random noise in the common detector gather, specifically includes the following operations:

[0019] The original shot gather data is sorted into common receiver point data. The aliasing shot interference start time picked up in step 1 is added to the head of the common receiver point data. Due to the randomness of the excitation time, the aliasing shot interference in the common receiver point data is now manifested as random noise. The FX domain random noise attenuation technique is used for attenuation.

[0020] A further improvement of the present invention is that:

[0021] Sorting the original shot gather data into common receiver data means changing the data arrangement from shot number-receiver number to receiver number-shot number.

[0022] A further improvement of the present invention is that:

[0023] The raw shot gather data refers to the raw, uncorrected shot gather data.

[0024] A further improvement of the present invention is that:

[0025] The shot-gathering linear noise suppression in step 3 specifically includes the following operations:

[0026] After the random noise is attenuated, the common detector gathers are sorted back to the shot domain. The gathers are flattened by using the aliasing interference start-up time. At this time, the aliasing shot interference appears as a flat axis, and the effective signal appears as random noise. The FK domain linear interference suppression technique is used to suppress it.

[0027] A further improvement of the present invention is that:

[0028] The process of sorting the common receiver gather after random noise attenuation back to the shot domain involves changing the data arrangement from receiver number-shot number to shot number-receiver number.

[0029] The second objective of this invention is to provide a scrambled gun jamming suppression system, comprising:

[0030] The pickup unit is used to pick up the launch time of the scrambled gun interference.

[0031] Noise attenuation unit for common receiver point gather random noise attenuation;

[0032] Suppression unit for linear noise suppression of shot gather.

[0033] The third object of the present application is to provide a computer readable storage medium, the computer readable storage medium stores at least one computer executable program, the at least one program is executed by the computer, and the computer executes the steps of the aliasing shot interference suppression method.

[0034] The fourth aspect of the present application provides a computer device, comprising a memory and a processor, the memory stores a computer program, and the computer program is executed by the processor, so that the processor executes the steps of the aliasing shot interference suppression method.

[0035] Compared with the prior art, the beneficial effects of the present application are:

[0036] (1) simple principle, obvious effect;

[0037] (2) fast and efficient, can meet the production cycle;

[0038] (3) can improve the signal-to-noise ratio of deep stratum and improve the imaging quality. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 is a flow chart of the aliasing shot interference suppression method of the present application;

[0040] Figure 2 is the effect of shot gather after suppressing the aliasing shot interference before and after suppressing the aliasing shot interference by using the present application;

[0041] Figure 3 is the effect of shot gather after suppressing the aliasing shot interference before and after suppressing the aliasing shot interference by using the present application;

[0042] Figure 4 is the effect of common receiver gather after suppressing the aliasing shot interference before and after suppressing the aliasing shot interference by using the present application;

[0043] Figure 5 is the effect of common receiver gather after suppressing the aliasing shot interference before and after suppressing the aliasing shot interference by using the present application;

[0044] Figure 6 is the effect of stacking after suppressing the aliasing shot interference before and after suppressing the aliasing shot interference by using the present application;

[0045] Figure 7 is the effect of stacking after suppressing the aliasing shot interference before and after suppressing the aliasing shot interference by using the present application. DETAILED DESCRIPTION

[0046] The application will be described in further detail below with reference to the drawings:

[0047] Land and sea high-density high-efficiency data collection will inevitably produce aliasing shot interference, which will seriously affect the signal-to-noise ratio of seismic data and bring many influences to the subsequent processing of seismic data. The aliasing shot interference suppression idea and method provided by the application can quickly and efficiently suppress the aliasing shot interference under the premise of fidelity, and provide protection for subsequent high-precision processing and seismic imaging.

[0048] The application provides an aliasing shot interference suppression method, and the implementation of the method is as follows:

[0049] Example 1

[0050] As shown in Figure 1 , the method comprises the following steps:

[0051] Step 1, picking up the aliasing shot interference take-off time;

[0052] The specific operation comprises the following steps:

[0053] Linear motion correction processing is performed on the seismic shot gather, the energy ratio method is used to automatically pick up the aliasing shot interference take-off time, and inverse linear motion correction processing is performed on the picked-up aliasing shot interference take-off time.

[0054] Step 2, common receiver gather random noise attenuation;

[0055] The specific operation comprises the following steps:

[0056] The original shot gather data is sorted into common receiver gather data, and the aliasing shot interference take-off time picked up in step 1 is added to the trace header of the common receiver gather data. Due to the randomness of the firing time, the aliasing shot interference on the common receiver gather data is random noise, and F-X domain random noise attenuation technology is used for attenuation.

[0057] The original shot gather data is sorted into common receiver gather data, which means that the arrangement mode of the data is changed from the shot number-receiver number to the receiver number-shot number.

[0058] The original shot gather data refers to the shot gather data that has not been corrected.

[0059] Step 3, shot gather linear noise suppression;

[0060] The specific operation comprises the following steps:

[0061] The common receiver gather data after random noise attenuation is sorted back to the shot domain, and the picked-up aliasing interference take-off time is used to flatten the gather. At this time, the aliasing shot interference is flat-axis, and the effective signal is random noise, and F-K domain linear interference suppression technology is used for suppression.

[0062] The process of sorting the common receiver gather after random noise attenuation back to the shot domain involves changing the data arrangement from receiver number-shot number to shot number-receiver number.

[0063] Figure 2 To achieve the effect of suppressing the aliasing of guns before and suppressing the gun concentration after using the present invention, Figure 3 This invention utilizes the suppression effect of superimposed gun interference after suppression to achieve the effect of gun concentration; from Figure 2 and Figure 3 It is evident that the interference of the high-energy superposition gun was eliminated after suppression, and the true deep strata reaction was revealed.

[0064] Figure 4 This invention achieves the effect of suppressing pre-aliasing shot interference and suppressing the common detector channel gather. Figure 5 This invention achieves the effect of suppressing aliasing interference in the common detector channel gather; from Figure 4 and Figure 5 It is evident that the interference from both direct and reflected signals of the high-energy aliasing cannon was effectively removed after suppression, resulting in enhanced effective signal strength.

[0065] Figure 6 This invention utilizes the superposition effect of suppressing pre-overlapping interference and subsequent suppression. Figure 7 This invention utilizes the superposition effect of suppression and aliasing interference after suppression, from... Figure 6 and Figure 7 It is evident that the interference from the high-energy aliasing cannon was eliminated after suppression, and the signal-to-noise ratio was significantly improved.

[0066]

Example 2

[0067] This invention provides a scrambled gun jamming suppression system, comprising:

[0068] The pickup unit is used to pick up the aliasing interference launch time and performs the following operations:

[0069] Linear dynamic correction is performed on the seismic shot gather, and the energy ratio method is used to automatically pick up the aliasing shot interference start time. The picked up aliasing shot interference start time is then subjected to inverse linear dynamic correction.

[0070] The noise attenuation unit, used for random noise attenuation in the common detector gather, performs the following operations:

[0071] The original shot gather data is sorted into common receiver point data. The aliasing shot interference start time is added to the head of the common receiver point data. Due to the randomness of the excitation time, the aliasing shot interference in the common receiver point data is now manifested as random noise. The FX domain random noise attenuation technique is used for attenuation.

[0072] The sorting of the original shot gather data into common receiver point data means changing the arrangement of the data from shot number-receiver point number to receiver point number-shot number.

[0073] The original shot gather data refers to shot gather data that has not been corrected.

[0074] The suppression unit is used for shot gather linear noise suppression and performs the following operations:

[0075] The common receiver point gather after random noise attenuation is sorted back to the shot domain, and the gather is flattened by using the picked up overlapping interference take-off time, at this time, the overlapping shot interference is expressed as a flat axis, and the effective signal is expressed as random noise, and F-K domain linear interference suppression technology is used for suppression.

[0076] The common receiver point gather after random noise attenuation is sorted back to the shot domain, and the arrangement of the data is changed from receiver point number-shot number to shot number-receiver point number.

[0077]

Embodiment 3

[0078] The embodiment of the application provides a computer readable storage medium, the computer readable storage medium stores at least one computer executable program, when the at least one program is executed by the computer, the computer executes the following steps:

[0079] Step 1, picking up the overlapping shot interference take-off time;

[0080] The specific operation includes:

[0081] The seismic shot gather is subjected to linear moveout correction processing, the energy ratio method is used for automatic picking up of the overlapping shot interference take-off time, and the picked up overlapping shot interference take-off time is subjected to inverse linear moveout correction processing.

[0082] Step 2, random noise attenuation of common receiver point gather;

[0083] The specific operation includes:

[0084] The original shot gather data is sorted into common receiver point data, and the overlapping shot interference take-off time picked up in step 1 is added to the trace header of the common receiver point data, due to the randomness of the firing time, at this time, the overlapping shot interference is expressed as random noise on the common receiver point data, and F-X domain random noise attenuation technology is used for attenuation.

[0085] The sorting of the original shot gather data into common receiver point data means changing the arrangement of the data from shot number-receiver point number to receiver point number-shot number.

[0086] The original shot gather data refers to shot gather data that has not been corrected.

[0087] Step 3, shot gather linear noise suppression;

[0088] The specific operation includes:

[0089] The common receiver point gather after random noise attenuation is sorted back to the shot domain, the picked mixed interference take-off time is used to flatten the gather, at this time, the mixed interference shot interference is expressed as a flat axis, the effective signal is expressed as random noise, and the F-K domain linear interference suppression technology is used for suppression.

[0090] The common receiver point gather after random noise attenuation is sorted back to the shot domain, that is, the arrangement mode of data is changed from the shot number-receiver point number to the receiver point number-shot number.

[0091] Example 4

[0092] The embodiment of the application provides a computer device, including a memory and a processor, the memory stores a computer program, and the computer program is executed by the processor to make the processor execute the following steps:

[0093] Step 1, picking up the mixed interference shot interference take-off time;

[0094] The specific operation includes:

[0095] The linear moveout correction processing is performed on the seismic shot gather, the energy ratio method is used for automatic picking up of the mixed interference shot interference take-off time, and the inverse linear moveout correction processing is performed on the picked mixed interference shot interference take-off time.

[0096] Step 2, random noise attenuation of the common receiver point gather;

[0097] The specific operation includes:

[0098] The original shot gather data is sorted into common receiver point data, the mixed interference shot interference take-off time picked up in step 1 is added to the trace header of the common receiver point data, due to the randomness of the firing time, at this time, the mixed interference shot interference is expressed as random noise on the common receiver point data, and the F-X domain random noise attenuation technology is used for attenuation.

[0099] The original shot gather data is sorted into common receiver point data, that is, the arrangement mode of data is changed from the shot number-receiver point number to the receiver point number-shot number.

[0100] The original shot gather data refers to the shot gather data without correction processing.

[0101] Step 3, shot gather linear noise suppression;

[0102] The specific operation includes:

[0103] The common receiver point gather after random noise attenuation is sorted back to the shot domain, and the picked mixed interference take-off time is used to flatten the gather, at this time the mixed interference shot appears as a flat axis and the effective signal appears as random noise, and the F-K domain linear interference suppression technology is used for suppression.

[0104] The common receiver point gather after random noise attenuation is sorted back to the shot domain, and the picked mixed interference take-off time is used to flatten the gather, at this time the mixed interference shot appears as a flat axis and the effective signal appears as random noise, and the F-K domain linear interference suppression technology is used for suppression.

[0105] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by a computer program instructing related hardware, and the program can be stored in a non-volatile computer readable storage medium. When the program is executed, it can include the processes of the above-mentioned embodiments of each method. In the embodiments provided in the present application, any reference to memory, storage, database or other medium can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM) and the like.

[0106] SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM) and the like.

[0107] The above technical solutions are only one embodiment of the present application. For those skilled in the art, on the basis of the principles disclosed in the present application, various types of improvements or modifications can be easily made, and are not limited to the technical solutions described in the above-mentioned embodiments of the present application. Therefore, the above description is only preferred, and does not have the meaning of limitation.

Claims

1. A method of aliasing artillery jamming suppression, characterized by, Includes the following steps: Step 1: Pick up the scrambled cannon interference jump time; Step 2, random noise attenuation of common detector gathers; Step 3, suppressing linear noise in the shot collection; The specific operations for picking up the aliasing interference take-off time in step 1 include: Linear dynamic correction is performed on the seismic shot gather, and the energy ratio method is used to automatically pick up the aliasing shot interference start time. The picked up aliasing shot interference start time is then subjected to inverse linear dynamic correction. Step 2, which involves attenuating random noise in the common detector gather, specifically includes the following operations: The original shot gather data is sorted into common receiver point data. The aliasing shot interference start time picked up in step 1 is added to the head of the common receiver point data. Due to the randomness of the excitation time, the aliasing shot interference in the common receiver point data is random noise at this time. The FX domain random noise attenuation technique is used for attenuation. The shot-gathering linear noise suppression in step 3 specifically includes the following operations: After the random noise is attenuated, the common detector gathers are sorted back to the shot domain. The gathers are flattened by using the aliasing interference start-up time. At this time, the aliasing shot interference appears as a flat axis, and the effective signal appears as random noise. The FK domain linear interference suppression technique is used to suppress it.

2. The aliasing cannon jamming suppression method of claim 1, wherein, Sorting the original shot gather data into common receiver data means changing the data arrangement from shot number-receiver number to receiver number-shot number.

3. The alias cannon jamming suppression method of claim 2, wherein, The raw shot gather data refers to the raw, uncorrected shot gather data.

4. The aliasing cannon jamming suppression method of claim 3, wherein, The process of sorting the common receiver gather after random noise attenuation back to the shot domain involves changing the data arrangement from receiver number-shot number to shot number-receiver number.

5. An aliasing cannon jamming suppression system characterized by, The system is used to execute the aliasing jamming suppression method according to any one of claims 1-4, the system comprising: The pickup unit is used to pick up the launch time of the scrambled gun interference. Noise attenuation unit, used for random noise attenuation in common detector gathers; Suppression unit, used for suppressing linear noise in the shot assemblies.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one computer-executable program, which, when executed by the computer, causes the computer to perform the steps in the scrambled gun jamming suppression method as described in any one of claims 1-4.

7. A computer device, comprising: It includes a memory and a processor, the memory storing a computer program that, when executed by the processor, causes the processor to perform the steps of the aliasing jamming suppression method as described in any one of claims 1-4.

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