Method, system, equipment and medium for suppressing sand dune ringing by using guided waves

Abstract

The invention belongs to the field of seismic data processing, and relates to a method, a system, equipment and a medium for suppressing sand dune ringing by utilizing guided waves. According to the method, the linear signal model of dune ringing is obtained according to the linear signal of the original gather signal. The linear signal model of sand dune ringing is not interfered by random noise, and the model precision is higher. Matching the linear signal model of the sand dune ringing with the original gather signal to obtain a real sand dune ringing linear signal; a real dune ringing linear signal is perfectly predicted, and an effective signal is not damaged. A real sand dune ringing linear signal is subtracted from an original gather signal by using a self-adaptive subtraction technology, so that the purpose of suppressing sand dune ringing in the original gather signal is achieved. The method can effectively suppress sand dune ringing, protect effective signals, and provide powerful technical support for later seismic data processing.

Description

Technical Field

[0001] The invention belongs to the field of seismic data processing and relates to a method, system, equipment and medium for suppressing dune rumble by using guided waves. Background Art

[0002] Dune ringing is a common phenomenon in seismic data in desert areas, and it is extremely difficult to suppress it. Dune ringing refers to a type of noise formed by the multiple reflections and superposition of seismic waves in the sand layer between the water table and the dune surface, which are two strong wave impedance interfaces during seismic exploration in desert areas. In recent years, predictive deconvolution technology is usually used in seismic data processing to suppress dune ringing. It mainly uses the periodicity of ringing (related to the dune elevation) and uses different prediction steps and operator lengths to compress the main reflection waves to achieve the purpose of suppressing ringing. However, the disadvantage of this technology is obvious. Since the dune ringing period is related to the dune elevation, the prediction step required by the predictive deconvolution technology changes dramatically, which is not conducive to wavelet consistency processing and protection of effective signals.

[0003] That is, dune rumble is a common phenomenon in desert areas. The predictive deconvolution method to suppress dune rumble is not conducive to wavelet consistency processing and is prone to damage effective signals. Summary of the invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a method, system, equipment and medium for suppressing dune rumble using guided waves. The present invention can effectively suppress dune rumble, protect effective signals, and provide strong technical support for subsequent seismic data processing.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] In a first aspect, the present invention discloses a method for suppressing dune rumble using guided waves, comprising the following steps:

[0007] The linear signal model of dune rumble is obtained according to the linear signal of the original gather signal;

[0008] The linear signal model of dune rumbling is matched with the original gather signal to obtain the real linear signal of dune rumbling.

[0009] The real dune rumble linear signal is subtracted from the original gather signal by using the adaptive subtraction technique to obtain the gather signal without dune rumble.

[0010] In a second aspect, the present invention further discloses a system for suppressing dune rumble using guided waves, comprising:

[0011] Original signal processing module: used to obtain the linear signal model of dune rumble according to the linear signal of the original gather signal;

[0012] Real signal acquisition module: used to match the linear signal model of dune rumbling with the original gather signal to obtain the real linear signal of dune rumbling;

[0013] Dune rumble elimination module: It is used to subtract the real dune rumble linear signal from the original gather signal by using adaptive subtraction technology to obtain the gather signal with dune rumble removed.

[0014] In a third aspect, the present invention provides an electronic device, comprising: a processor; a memory for storing computer program instructions; and a method for suppressing dune rumble using guided waves when executing the computer program.

[0015] In a fourth aspect, the present invention provides a storage medium storing computer program instructions. When the computer program instructions are loaded and executed by a processor, the processor executes a method of suppressing dune rumble using guided waves.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention obtains a linear signal model of dune rumbling based on the linear signal of the original gather signal. The linear signal model of dune rumbling is not interfered by random noise, and the model accuracy is higher. The linear signal model of dune rumbling is matched with the original gather signal to obtain a real dune rumbling linear signal; the real dune rumbling linear signal is perfectly predicted without damaging the effective signal. The adaptive subtraction technology is used to subtract the real dune rumbling linear signal from the original gather signal to obtain a gather signal with dune rumbling removed, thereby achieving the purpose of suppressing the dune rumbling in the original gather signal. The present invention can effectively suppress dune rumbling, protect effective signals, and provide strong technical support for later seismic data processing.

[0018] The system of the present invention includes an original signal processing module, a real signal acquisition module and a dune ringing elimination module. The original signal processing module is used to obtain the linear signal model of dune ringing according to the linear signal of the original gather signal. The real signal acquisition module is used to match the linear signal model of dune ringing with the original gather signal to obtain the real dune ringing linear signal. The dune ringing elimination module is used to subtract the real dune ringing linear signal from the original gather signal by using the adaptive subtraction technology to obtain the gather signal with the dune ringing removed. The modules cooperate with each other to effectively suppress the dune ringing, protect the effective signal, and provide strong technical support for the later seismic data processing.

[0019] The electronic device and storage medium of the present invention can also effectively suppress dune rumble, protect effective signals, and provide powerful technical support for later seismic data processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a flow chart of the method of the present invention;

[0021] Figure 2a This is a shot gathering data diagram before dune rumble suppression according to an embodiment of the present invention;

[0022] Figure 2b This is a shot gathering data diagram after dune ringing suppression according to an embodiment of the present invention;

[0023] Figure 2c This is a noise effect diagram of an embodiment of the present invention;

[0024] Figure 3a This is a shot gathering data diagram before dune rumble suppression according to another embodiment of the present invention;

[0025] Figure 3b This is a shot gathering data diagram after dune ringing suppression according to another embodiment of the present invention;

[0026] Figure 3c This is a noise effect diagram of another embodiment of the present invention;

[0027] Figure 4a This is a shot gathering data diagram before dune rumble suppression according to another embodiment of the present invention;

[0028] Figure 4b This is a shot gathering data diagram after dune ringing suppression according to another embodiment of the present invention;

[0029] Figure 4c This is a noise effect diagram of another embodiment of the present invention;

[0030] Figure 5 is a flow chart of a method embodiment of the present invention;

[0031] Figure 6 It is a system module diagram of the present invention. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0035] See also Figure 1 The present invention discloses a method for suppressing dune rumble by using guided waves, comprising the following steps:

[0036] S1. Obtaining a linear signal model of dune rumble based on the linear signal of the original gather signal;

[0037] S2. Matching the linear signal model of dune rumbling with the original gather signal to obtain a real linear signal of dune rumbling;

[0038] S3. Using the adaptive subtraction technique, the real dune rumble linear signal is subtracted from the original gather signal to obtain the gather signal with dune rumble removed.

[0039] See also Figure 1In another feasible embodiment of the present invention, the following is adaptively modified according to the situation. The linear signal model of dune rumbling is obtained according to the linear signal of the original gather signal. The linear signal model of dune rumbling is not interfered by random noise, and the model accuracy is higher. The linear signal model of dune rumbling is matched with the original gather signal to obtain a real dune rumbling linear signal; the real dune rumbling linear signal is perfectly predicted without damaging the effective signal. The adaptive subtraction technology is used to subtract the real dune rumbling linear signal from the original gather signal to obtain the gather signal without dune rumbling, thereby achieving the purpose of suppressing the dune rumbling in the original gather signal and improving the quality of the original gather signal. The present invention can effectively suppress dune rumbling, protect effective signals, and provide strong technical support for later seismic data processing. It mainly adopts technologies such as model inversion, adaptive technology, effective signal protection and noise subtraction method, so it has great advantages in effective signal protection and wavelet consistency processing. Compared with the predictive deconvolution technology, the present invention has a more significant effect in suppressing dune rumbling and significantly improves the signal-to-noise ratio. At the same time, the present invention has a strong ability to identify multiple refractions at medium and long offsets, is not affected by factors such as scattering and false frequencies, and effectively reduces the impact of linear characteristic degradation caused by irregular sampling.

[0040] Embodiment 1:

[0041] See also Figure 1 This embodiment discloses a method for suppressing dune rumble using guided waves, comprising the following steps:

[0042] S1. Obtain the linear signal model of dune rumble based on the linear signal of the original gather signal, as follows:

[0043] Using the forward modeling module of the GeoEast processing system, the velocity model of the dune ringing linear signal is obtained according to the difference in transmission velocity of the linear signal in the real strata and dunes, as well as the velocity and frequency of the linear signal. The linear signal model of the dune ringing is inverted using the velocity model of the linear signal of the dune ringing.

[0044] The extraction process of linear signal is as follows:

[0045] The velocity model of the linear signal in the original gather signal is obtained, the linear signal model is inverted using the velocity model of the linear signal, and the linear signal model is adaptively subtracted from the original gather signal to obtain an effective linear signal.

[0046] The velocity model for obtaining the linear signal in the original gather signal is as follows:

[0047] By using the linear noise suppression technology in the GeoEast processing system, the velocity model of the linear signal in the original gather signal is obtained through the velocity and frequency of the linear signal in the original gather signal.

[0048] The original gather signal is the signal generated by the guided wave during the propagation process underground.

[0049] S2. Match the linear signal model of dune rumble with the original gather signal to obtain the real linear signal of dune rumble, as follows:

[0050] Adaptive technology is used to match the linear signal model of dune rumbling with the amplitude and frequency of each sampling point of the original gather signal to obtain the real linear signal of dune rumbling.

[0051] After obtaining the real dune rumbling linear signal, an effective signal protection process is performed on the real dune rumbling linear signal.

[0052] S3. The real dune rumble linear signal is subtracted from the original gather signal by using the adaptive subtraction technology to obtain the gather signal without dune rumble, thus improving the quality of the original gather signal.

[0053] Embodiment 2:

[0054] See also Figure 5 This embodiment discloses a method for suppressing dune rumble using guided waves, comprising the following steps:

[0055] S1. Extract linear signal;

[0056] The original gather signal is the signal generated by the guided wave during underground propagation. Using the linear noise suppression technology in the GeoEast processing system, the velocity model of the linear signal in the original gather signal is obtained by providing the velocity and frequency parameters of the linear signal in the original gather signal, and then the linear signal model is inverted using the velocity model of the linear signal. Finally, the linear signal model is inverted using the adaptive subtraction of the original gather signal to extract the effective linear signal from the original gather signal, thereby achieving the attenuation of random noise and improving the linear signal-to-noise ratio, laying the foundation for the subsequent prediction of the dune rumble linear signal model.

[0057] S2. Inversion of dune rumble linear signal model;

[0058] According to the difference in the transmission speed of linear signals in real strata and dunes, the forward modeling module of GeoEast processing system is used to obtain the velocity model of dune ringing linear signals in the original gather signal by providing parameters such as the velocity and frequency of the linear signals in the dunes. Then, the linear signal model of dune ringing is inverted using the velocity model of the linear signal of dune ringing. The linear signal model of dune ringing is not affected by random noise and has higher model accuracy.

[0059] S3. Predict dune rumble;

[0060] Adaptive technology is used to match the linear signal model of dune rumble with the amplitude and frequency of each sampling point of the original gather signal to obtain the real dune rumble linear signal. After adaptation, the real dune rumble linear signal is perfectly predicted without damaging the effective signal.

[0061] S4. Effective signal protection processing;

[0062] In order to protect the effective signal as much as possible, the real dune rumble linear signal is dynamically corrected. After the correction, the effective signal will be suppressed and the linear signal of the dune rumble will be retained, thus achieving the effect of protecting the effective signal.

[0063] S5. Minus the dune shock.

[0064] The adaptive subtraction technology is used to subtract the real dune rumble linear signal from the original gather signal, thereby suppressing the dune rumble in the original gather signal.

[0065] Attached Figure 2a To Attachment Figure 4c This is the actual effect diagram of a certain 3D seismic data in the southwest area of ​​a basin after using this method. Figure 2a This is the artillery data before the dune shock suppression, attached Figure 2b This is the artillery data after the dune shock suppression, attached Figure 2c The noise effect diagram shows that the dune rumble suppression effect is significant using guided waves, the dune rumble prediction is accurate, and the subtraction method does not damage the effective signal. Figure 3a To Attachment Figure 4c This is a comparison of the dune rumble suppression before and after and the noise superposition profile. It can be seen that the dune rumble suppression effect is obvious on the superposition profile, there is no effective signal on the noise profile, and the consistency of the suppressed effective signal has not changed. From the application effect of this project, the dune rumble suppression effect is obvious, the effective signal protection is good, and the sub-wave has not changed.

[0066] The present invention mainly adopts technologies such as model inversion, adaptive technology, effective signal protection and noise subtraction, so it has great advantages in effective signal protection and wavelet consistency processing. Compared with predictive deconvolution technology, the present invention has a more significant effect in suppressing dune rumble and significantly improves the signal-to-noise ratio. At the same time, the present invention has a strong ability to identify multiple refractions at medium and long ranges, is not affected by factors such as scattering and false frequencies, and effectively reduces the impact of irregular sampling causing linear feature degradation.

[0067] See also Figure 6 Based on the above method, the present invention also discloses a system for suppressing dune rumble using guided waves, comprising:

[0068] Original signal processing module: used to obtain the linear signal model of dune rumble according to the linear signal of the original gather signal;

[0069] Real signal acquisition module: used to match the linear signal model of dune rumbling with the original gather signal to obtain the real linear signal of dune rumbling;

[0070] Dune rumble elimination module: It is used to subtract the real dune rumble linear signal from the original gather signal by using adaptive subtraction technology to obtain the gather signal with dune rumble removed.

[0071] See also Figure 6 In another feasible embodiment of the present invention, the following is adaptively modified according to the situation. It includes an original signal processing module, a real signal acquisition module and a dune ringing elimination module. The original signal processing module is used to obtain the linear signal model of dune ringing according to the linear signal of the original gather signal. The real signal acquisition module is used to match the linear signal model of dune ringing with the original gather signal to obtain a real dune ringing linear signal. The dune ringing elimination module is used to use adaptive subtraction technology to subtract the real dune ringing linear signal from the original gather signal to obtain a gather signal with dune ringing removed, thereby improving the quality of the original gather signal. The modules cooperate with each other to effectively suppress dune ringing, protect effective signals, and provide strong technical support for later seismic data processing.

[0072] An electronic device comprises: a processor; a memory for storing computer program instructions; and a method for suppressing dune rumble by using guided waves when executing the computer program.

[0073] A storage medium stores computer program instructions. When the computer program instructions are loaded and executed by a processor, the processor executes a method of suppressing dune rumble using guided waves.

[0074] Those skilled in the art will appreciate that embodiments of the present invention may be provided as systems or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0075] The present invention is described with reference to the flowcharts and / or block diagrams of the devices (systems) and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0076] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0077] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for suppressing dune rumble using guided waves, characterized in that: The following steps are involved: The linear signal model of dune rumble is obtained according to the linear signal of the original gather signal; The linear signal model of dune rumbling is matched with the original gather signal to obtain the real linear signal of dune rumbling. The real dune rumble linear signal is subtracted from the original gather signal by using the adaptive subtraction technique to obtain the gather signal without dune rumble.

2. A method for suppressing dune rumble using guided waves as claimed in claim 1, characterized in that: The linear signal model for obtaining dune rumble based on the linear signal of the original gather signal is specifically as follows: Using the forward modeling module of the GeoEast processing system, the velocity model of the dune ringing linear signal is obtained according to the difference in transmission velocity of the linear signal in the real strata and dunes, as well as the velocity and frequency of the linear signal. The linear signal model of the dune ringing is inverted using the velocity model of the linear signal of the dune ringing.

3. A method for suppressing dune rumble using guided waves as claimed in claim 2, characterized in that: The extraction process of the linear signal is as follows: The velocity model of the linear signal in the original gather signal is obtained, the linear signal model is inverted using the velocity model of the linear signal, and the linear signal model is adaptively subtracted from the original gather signal to obtain an effective linear signal.

4. A method for suppressing dune rumble using guided waves as claimed in claim 3, characterized in that: The velocity model for obtaining the linear signal in the original gather signal is specifically as follows: By using the linear noise suppression technology in the GeoEast processing system, the velocity model of the linear signal in the original gather signal is obtained through the velocity and frequency of the linear signal in the original gather signal.

5. The method for suppressing dune rumble by using guided waves as claimed in claim 4, characterized in that: The original gather signal is a signal generated during the propagation of the guided wave underground.

6. The method for suppressing dune rumble by using guided waves as claimed in claim 1, characterized in that: The linear signal model of dune rumbling is matched with the original gather signal to obtain the real dune rumbling signal as follows: Adaptive technology is used to match the linear signal model of dune rumbling with the amplitude and frequency of each sampling point of the original gather signal to obtain the real linear signal of dune rumbling.

7. The method for suppressing dune rumble by using guided waves as claimed in claim 1, characterized in that: After obtaining the real dune rumbling linear signal, an effective signal protection process is performed on the real dune rumbling linear signal.

8. A system for suppressing dune rumble using guided waves, characterized in that: include: Original signal processing module: used to obtain the linear signal model of dune rumble according to the linear signal of the original gather signal; Real signal acquisition module: used to match the linear signal model of dune rumbling with the original gather signal to obtain the real linear signal of dune rumbling; Dune rumble elimination module: It is used to subtract the real dune rumble linear signal from the original gather signal by using adaptive subtraction technology to obtain the gather signal with dune rumble removed.

9. An electronic device, comprising: processor; A memory for storing computer program instructions; characterized in that it is used to implement a method for suppressing dune rumble using guided waves as described in any one of claims 1 to 8 when executing the computer program.

10. A storage medium storing computer program instructions, characterized in that: When the computer program instructions are loaded and executed by the processor, the processor executes the method of suppressing dune rumble using guided waves as described in any one of claims 1 to 8.

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