Broadband wide-speed surface wave denoising method and device

Abstract

The invention provides a broadband wide-speed surface wave denoising method and device. The method comprises the following steps: rearranging cross arrangement domain data; determining frequency ranges of a low frequency band and a middle frequency band, and determining speed ranges of a surface wave low speed and a surface wave high speed; for the rearranged data in the low frequency band, denoising high-speed surface waves belonging to a surface wave high-speed speed range; for rearranged data in a middle frequency band, denoising high-speed surface waves belonging to a surface wave high-speed speed range, and meanwhile, adding protection for high-speed reflected waves; for the rearranged data in the low-frequency band and the middle-frequency band, low-speed surface waves belonging to the surface wave low-speed speed range are denoised, and meanwhile protection on high-speed reflected waves is added. According to the broadband wide-speed surface wave denoising method, surface wave noise is effectively removed, the strong reflection amplitude is protected and the signal-to-noise ratio of data is improved through frequency division and speed division irregular coherent noise suppression, so that amplitude-preserving noise suppression is realized on broadband wide-speed surface waves, and the amplitude characteristics of the reflection waves are protected.

Description

Technical Field

[0001] The present invention relates to the technical field of seismic exploration, and in particular to a broadband and broadband surface wave denoising method and device. Background Art

[0002] Surface rolls usually contain noise. Surface roll denoising is necessary for the following reasons:

[0003] First, improve the accuracy of seismic exploration: surface wave interference signals will mask effective signals, resulting in the information in the seismic record not accurately reflecting the underground geological conditions. By suppressing surface wave interference, the accuracy of seismic exploration can be improved and the underground geological conditions can be better understood.

[0004] Second, complete the exploration tasks in complex areas: In some complex areas, the surface wave interference signal is relatively strong. If it is not suppressed, it will affect the effect of seismic exploration. Therefore, suppressing the surface wave can improve the effect of seismic exploration in these complex areas.

[0005] According to the surface wave characteristics, the surface wave denoising methods mainly include the following three methods:

[0006] 1. FK filtering (Kalman filtering). When the surface wave dispersion is not serious, the surface wave mainly presents coherent linear characteristics. At this time, the FK filtering method can effectively remove it. FK filtering is a highly efficient recursive filter (autoregressive filter) that can estimate the state of a dynamic system from a series of measurements that do not completely contain noise. The essence of Kalman filtering is to seek a set of recursive estimation algorithms based on the minimum mean square error as the best criterion for estimation.

[0007] 2. Surface wave inversion. When the surface wave dispersion is serious, but the dispersion characteristics are obvious and the dispersion curve is easy to pick up, it is advisable to use the surface wave inversion method to remove it. Surface wave inversion is based on the dispersion curve of Rayleigh surface waves, and the velocity model of the underground medium is obtained through the inversion method.

[0008] 3. Low-frequency strong energy spectrum editing method. When the surface wave dispersion is serious and the dispersion relationship is chaotic, it is more appropriate to use the low-frequency strong energy spectrum editing method. This method is mainly used to suppress low-frequency interference in seismic exploration while protecting effective signals.

[0009] In addition, the black triangle surface wave noise generated by the controllable source needs to be considered separately.

[0010] Although different denoising methods can be selected according to the surface wave characteristics, each method has its own applicable conditions, and the actual data is often complex and difficult to meet these applicable conditions. The actual acquisition shot line distance and detection line distance are generally 200 meters to 400 meters. The data is missing when encountering obstacles. Sparse and irregular sampling often brings about the problem of false frequency and the problem of amplitude non-preservation in noise suppression effect. Regarding false frequency, by introducing a fan-shaped filter, a certain degree of anti-false frequency is achieved by estimating noise in the FX domain. However, due to the complex situation that the reflected signal and the surface wave noise overlap in space, time and frequency, there is still the problem of amplitude non-preservation in implementation. How to achieve effective amplitude preservation in complex surface and irregular acquisition data, the effect of existing methods is not satisfactory. In addition, the surface wave noise in some areas has a high speed and a wide frequency band, which can easily damage the strong reflection signal during the noise suppression process. Summary of the invention

[0011] In view of the shortcomings of the existing surface roll denoising methods, the present invention proposes a broadband and wide-speed surface roll denoising method, the method comprising:

[0012] Step 1: Rearrange the cross-arrangement domain data;

[0013] Step 2: Determine the frequency range of the low frequency band and the middle frequency band, and determine the speed range of the low speed and high speed of the surface wave;

[0014] Step 3: for the rearranged data in the low frequency band, denoising the high-speed surface waves within the high-speed range of the surface waves;

[0015] Step 4: for the rearranged data in the intermediate frequency band, denoising is performed on the high-speed surface waves within the high-speed range of the surface waves, and protection is added for the high-speed reflected waves;

[0016] Step 5: For the rearranged data in the low frequency band and the medium frequency band, the low-speed surface waves within the low-speed range of the surface waves are denoised, and protection for the high-speed reflected waves is added.

[0017] Preferably, the cross-arrangement domain data includes common detection line and common shot line data.

[0018] Preferably, the step 1 comprises:

[0019] Determine a plurality of regular shot lines based on the common detection line and common shot line data;

[0020] The gun line data between two adjacent regular gun lines are respectively integrated into the two adjacent regular gun lines according to a predetermined rule to form two rearranged gun lines.

[0021] Preferably, the frequency range of the low frequency band is 0-8 Hz, the frequency range of the medium frequency band is 8-20 Hz, the speed range of the low speed surface wave is 200-1000 m / s, and the speed range of the high speed surface wave is 1000-2500 m / s;

[0022] The high-speed reflected wave refers to a reflected wave whose wave speed is greater than a first predetermined speed, and the first predetermined speed is 4000 m / s.

[0023] Preferably, the adding of protection for high-speed reflected waves means subtracting the high-speed reflected waves from the removed surface wave noise.

[0024] Another aspect of the present invention provides a broadband and broadband surface roll denoising device, comprising:

[0025] A data rearrangement unit, used for rearranging the cross-arrangement domain data;

[0026] A range determination unit, for determining a frequency range of a low frequency band and a mid frequency band, and determining a velocity range of a low velocity surface wave and a high velocity surface wave;

[0027] A first denoising unit is used to denoise the high-speed surface waves within the high-speed range of the surface waves for the rearranged data in the low-frequency band;

[0028] A second denoising unit is used to denoise the high-speed surface waves within the high-speed range of the surface waves for the rearranged data in the intermediate frequency band, and to provide protection for the high-speed reflected waves;

[0029] The third denoising unit is used to denoise the low-speed surface waves within the low-speed range of the surface waves for the rearranged data in the low-frequency band and the medium-frequency band, and to provide protection for the high-speed reflected waves.

[0030] Preferably, the cross-arrangement domain data includes common detection line and common shot line data.

[0031] Preferably, the rearrangement of the cross-arrangement domain data comprises:

[0032] Determine a plurality of regular shot lines based on the common detection line and common shot line data;

[0033] The gun line data between two adjacent regular gun lines are respectively integrated into the two adjacent regular gun lines according to a predetermined rule to form two rearranged gun lines.

[0034] Preferably, the frequency range of the low frequency band is 0-8 Hz, the frequency range of the medium frequency band is 8-20 Hz, the speed range of the low speed surface wave is 200-1000 m / s, and the speed range of the high speed surface wave is 1000-2500 m / s;

[0035] The high-speed reflected wave refers to a reflected wave whose wave speed is greater than a first predetermined speed, and the first predetermined speed is 4000 m / s.

[0036] Preferably, the adding of protection for high-speed reflected waves means subtracting the high-speed reflected waves from the removed surface wave noise.

[0037] Another aspect of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the broadband and broadband surface roll denoising method is implemented.

[0038] Another aspect of the present invention provides an electronic device, the electronic device comprising:

[0039] A memory storing executable instructions;

[0040] A processor runs the executable instructions in the memory to implement the broadband and broadband surface roll denoising method.

[0041] The broadband and wide-speed surface roll denoising method of the present invention has the following beneficial effects:

[0042] 1. Rearrange the cross-arrangement domain data to make the shot points denser and reduce the generation of false frequencies during the denoising process.

[0043] 2. Through frequency-division and speed-division irregular coherent noise suppression, surface wave noise can be effectively removed, strong reflection amplitude can be protected, and data signal-to-noise ratio can be improved; thus, amplitude-preserving noise suppression can be achieved for broadband and speed surface waves, and the amplitude characteristics of reflection waves can be protected, providing real and reliable data guarantee for subsequent pre-stack inversion and reservoir prediction.

[0044] The method of the present invention has other characteristics and advantages, which will be apparent from or will be described in detail in the accompanying drawings and subsequent detailed descriptions incorporated herein, which together serve to explain the specific principles of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0046] Figure 1 A flow chart of a broadband and broadband surface roll denoising method according to an embodiment of the present invention is shown.

[0047] Figure 2A schematic diagram of cross-domain data rearrangement of a broadband and broadband surface roll denoising method according to an exemplary embodiment of the present invention is shown.

[0048] Figure 3 The distribution of shot point positions in a certain work area according to an exemplary embodiment of the present invention is shown.

[0049] Figure 4 and Figure 5 An original single shot and a frequency spectrum according to an exemplary embodiment of the present invention are shown respectively.

[0050] Figure 6 A raw single shot analysis of the 0-20 Hz frequency band range is shown according to an exemplary embodiment of the present invention.

[0051] Figure 7 A diagram showing the effect of rearranging the gun lines in a single cross-arrangement domain according to an exemplary embodiment of the present invention is shown.

[0052] Figure 8 A diagram showing the effect of rearranging multiple cross-arranged domain gun lines according to an exemplary embodiment of the present invention is shown.

[0053] Figure 9(a) to Figure 9(e) A diagram showing a denoising effect according to an exemplary embodiment of the present invention is shown.

[0054] Figure 10(a) to Figure 10(c) A diagram showing a denoising and superposition effect according to an exemplary embodiment of the present invention is shown. DETAILED DESCRIPTION

[0055] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0056] The present invention provides a broadband and broadband surface roll denoising method, comprising the following steps:

[0057] Step 1: Rearrange the cross-arrangement domain data;

[0058] Step 2: Determine the frequency range of the low frequency band and the middle frequency band, and determine the speed range of the low speed and high speed of the surface wave;

[0059] Step 3: For the rearranged data in the low frequency band, the high-speed surface waves within the high-speed range of the surface waves are denoised;

[0060] Step 4: For the rearranged data in the mid-frequency band, the high-speed surface waves within the high-speed range of the surface waves are denoised, and protection for the high-speed reflected waves is added;

[0061] Step 5: For the rearranged data in the low-frequency and mid-frequency bands, the low-speed surface waves within the low-speed range of the surface waves are denoised, and protection for the high-speed reflected waves is added.

[0062] The broadband and wide-speed surface wave denoising method of the present invention suppresses irregular coherent noise by frequency division and speed division, effectively removes surface wave noise, protects strong reflection amplitude, and improves data signal-to-noise ratio, thereby achieving amplitude-preserving noise suppression for broadband and wide-speed surface waves, protecting the amplitude characteristics of reflection waves, and providing real and reliable data guarantee for subsequent pre-stack inversion and reservoir prediction.

[0063] Example 1

[0064] This embodiment provides a broadband and broadband surface roll denoising method, comprising the following steps:

[0065] Step 1: Rearrange the cross-arrangement domain data.

[0066] Cross-domain refers to the fact that in certain signal processing or data acquisition applications, the transmission and reception of signals (or "co-detection" and "co-reception") are performed in different devices or systems. In radar or sonar systems, cross-domain can be used to achieve target detection and tracking. By processing the transmitted signal and the received signal in different devices or systems, more accurate target position and velocity information can be obtained.

[0067] The cross-arrangement domain (common detection line and common shot line) data has the smallest shot point distance (generally 25 meters or 50 meters) and detection point distance (generally 25 meters) in the acquisition parameters, and the spatial sampling is dense, so the degree of false frequency is the lowest. Various denoising methods are gradually being carried out in the cross-arrangement domain.

[0068] The basic idea of ​​denoising the cross-permutation domain data is to convert the signal from the cannon domain to the cross-permutation domain, and then process the signal in the cross-permutation domain. Usually, the noise and interference in the signal will show different characteristics in the cross-permutation domain, so the signal in the cross-permutation domain can be processed to achieve the effect of denoising and signal enhancement.

[0069] The specific cross-permutation domain denoising methods vary depending on the application scenario and signal type. Common cross-permutation domain denoising methods include Fourier transform, wavelet transform, short-time Fourier transform, etc. These methods can process the signal in the cross-permutation domain to achieve the effect of denoising and enhancing the signal.

[0070] However, in actual seismic data collection, factories, villages, tall sand dunes, cliffs, rivers, etc. are often encountered, where blasting cannot be carried out, resulting in missing blast points, which in turn makes the blast points on the cross-arranged domain blast lines sparsely distributed and the data gaps large, affecting the denoising effect.

[0071] Therefore, in this step, the cross-arrangement domain data is rearranged. The cross-arrangement domain data includes common detection line and common shot line data, and the specific steps of rearranging the cross-arrangement domain data include:

[0072] Determine multiple regular shot lines based on common detection line and common shot line data;

[0073] The gun line data between two adjacent regular gun lines are respectively integrated into the two adjacent regular gun lines according to a predetermined rule to form two rearranged gun lines.

[0074] The predetermined rule may be to integrate the shot line data into a regular shot line with a closer number, or to integrate the shot line data into a regular shot line with a closer distance. The rearranged shot lines obtained after integration are evenly spaced, and the shot points are denser, which is conducive to subsequent denoising.

[0075] Figure 2 FIG. 4 shows a schematic diagram of cross-arrangement domain data rearrangement according to this embodiment. Figure 2 As shown, the regular gun lines are gun line 1 and gun line 7, and the gun line increment is 6. Distributed between gun line 1 and gun line 7 are irregular gun lines 2, gun line 3, gun line 4, gun line 5, and gun line 6. According to a predetermined rule, gun line 2, gun line 3, and gun line 4 can be integrated into gun line 1, and gun line 5 and gun line 6 can be integrated into gun line 7. In this way, two rearranged gun lines are formed, and the gun points on the rearranged gun lines are densely distributed, the gun point gaps are reduced, and the gun points on the gun lines are densely distributed. Or according to another predetermined rule, gun line 2 and gun line 3 can be integrated into gun line 1, and gun line 4, gun line 5, and gun line 6 can be integrated into gun line 7, and similar effects can be obtained. And so on for other gun lines.

[0076] Step 2: Determine the frequency range of the low frequency band and the mid frequency band, and determine the speed range of the low speed and high speed surface wave.

[0077] This embodiment adopts the frequency division and speed division denoising method. Therefore, it is necessary to predetermine the frequency range of the low frequency band and the medium frequency band, and determine the speed range of the low speed and high speed of the surface wave. In this embodiment, the frequency range of the low frequency band is 0-8 Hz, the frequency range of the medium frequency band is 8-20 Hz, the speed range of the low speed of the surface wave is 200-1000 m / s, and the speed range of the high speed of the surface wave is 1000-2500 m / s. According to the actual application scenario, the above frequency range and speed range can be appropriately adjusted. For example, the surface wave speed is generally several hundred meters per second, and the bandwidth is generally around 3-15 Hz, but the surface wave speed in some parts of southwest my country is as high as 2500 m / s, and the bandwidth is 5-20 Hz. Therefore, when the method of this embodiment is applied to different regions, the above frequency range and speed range can be appropriately adjusted.

[0078] Step 3: For the rearranged data in the low frequency band, the high-speed surface waves within the high-speed range of the surface waves are denoised.

[0079] This embodiment adopts a denoising method of first high speed and then low speed, first low frequency and then medium and low frequency. Specifically, for the rearranged data, first the rearranged data in the low frequency band is denoised for the high-speed surface waves within the high-speed speed range of the surface waves. That is, for the rearranged data in the frequency range of 0-8 Hz, the high-speed surface waves within the speed range of 1000-2500 m / s are denoised.

[0080] The surface roll denoising method may adopt one of the above three methods, namely FK filtering, surface roll inversion or low frequency strong energy spectrum editing method, or may adopt other conventional methods known in the art to perform surface roll denoising, which is determined by the surface roll characteristics.

[0081] Step 4: For the rearranged data in the mid-frequency band, the high-speed surface waves within the high-speed range of the surface waves are denoised, and protection for the high-speed reflected waves is added.

[0082] After processing the low-frequency high-speed data, for the rearranged data in the mid-frequency band, the high-speed surface waves within the high-speed speed range of the surface waves are denoised, and protection for the high-speed reflected waves is added. That is, for the rearranged data in the frequency range of 8-20hz, the high-speed surface waves with a speed within 1000-2500m / s are denoised, and the high-speed reflected waves are subtracted from the removed surface wave noise. The high-speed reflected wave refers to the reflected wave with a wave speed greater than the first predetermined speed. In this embodiment, the first predetermined speed is 4000m / s. For example, in local areas in southwest my country, the reflected wave speed submerged by the surface wave is greater than 4000m / s, the frequency is within the range of 8-50hz, and the amplitude is as strong as the surface wave. The multiple overlaps of the surface wave and the reflected wave increase the difficulty of amplitude-preserving denoising. Therefore, in this step, it is necessary to add protection for the high-speed reflected wave at the same time, that is, to subtract the high-speed reflected wave from the removed surface wave noise, that is, to re-insert the high-speed reflected wave into the rearranged data.

[0083] Step 5: For the rearranged data in the low-frequency and mid-frequency bands, the low-speed surface waves within the low-speed range of the surface waves are denoised, and protection for the high-speed reflected waves is added.

[0084] Finally, for the rearranged data in the low-frequency band and the medium-frequency band, the low-speed surface waves within the low-speed range of the surface waves are denoised, and the protection of the high-speed reflected waves is added. That is, for the rearranged data in the frequency range of 0-8 Hz and 8-20 Hz, the low-speed surface waves within the speed range of 200-1000 m / s are denoised, and the high-speed reflected waves are subtracted from the removed surface wave noise, that is, the high-speed reflected waves are re-inserted into the rearranged data. Similarly, the high-speed reflected wave refers to a reflected wave with a wave speed greater than the first predetermined speed. In this embodiment, the first predetermined speed is 4000 m / s.

[0085] Example 2

[0086] Embodiment 2 provides a broadband and broadband surface roll denoising method, comprising the following steps:

[0087] Step 1: Rearrange the cross-arrangement domain data;

[0088] Step 2: Determine the frequency range of the low frequency band and the middle frequency band, and determine the speed range of the low speed and high speed of the surface wave;

[0089] Step 3: For the rearranged data in the low frequency band, the high-speed surface waves within the high-speed range of the surface waves are denoised;

[0090] Step 4: For the rearranged data in the mid-frequency band, the high-speed surface waves within the high-speed range of the surface waves are denoised, and protection for the high-speed reflected waves is added;

[0091] Step 5: For the rearranged data in the low-frequency and mid-frequency bands, the low-speed surface waves within the low-speed range of the surface waves are denoised, and protection for the high-speed reflected waves is added.

[0092] The cross-arrangement domain data includes common detection line and common shot line data.

[0093] Wherein, step 1 comprises:

[0094] Determine multiple regular shot lines based on common detection line and common shot line data;

[0095] Determine a plurality of regular shot lines based on the common detection line and common shot line data;

[0096] The gun line data between two adjacent regular gun lines are respectively integrated into two adjacent regular gun lines according to a predetermined rule to form two rearranged gun lines.

[0097] Among them, the frequency range of the low frequency band is 0-8hz, the frequency range of the medium frequency band is 8-20hz, the speed range of the low speed surface wave is 200-1000m / s, and the speed range of the high speed surface wave is 1000-2500m / s;

[0098] The high-speed reflected wave refers to a reflected wave whose wave speed is greater than a first predetermined speed, and the first predetermined speed is 4000 m / s.

[0099] Here, adding protection for high-speed reflected waves means subtracting the high-speed reflected waves from the removed surface wave noise.

[0100] This embodiment is applied to the southwest region of China. The data collected in this region is irregular due to the influence of rivers and cliffs, and the distribution of shot points on the shot line is disorderly. Figure 3 The surface wave of a single gun is mainly linear, with a speed of up to 2500m / s and a frequency band of about 5-20hz. Figure 4 and Figure 5 As shown in Figure 1, surface waves are characterized by wide frequency and wide speed. In a single shot at 0-20 Hz, surface waves and reflected waves are developed simultaneously, as shown in Figure 1. Figure 6 As shown, this requires protecting the reflected wave while removing the surface wave.

[0101] According to the broadband and broadband surface wave denoising method of this embodiment, the cross-arrangement domain data is first rearranged, and the rearranged shot lines are as follows: Figure 7 and Figure 8 shown. Figure 7 The medium purple represents the detection line and the red represents the shot points. After the rearrangement, the gaps in the shot points on the shot line are reduced and the gun points are denser. Figure 8 Different colors represent different artillery line numbers, and the artillery line distribution rules after rearrangement.

[0102] Then, determine the frequency range of the low frequency band and the medium frequency band, and determine the speed range of the low speed and high speed surface wave. The frequency range of the low frequency band is 0-8hz, the frequency range of the medium frequency band is 8-20hz, the speed range of the low speed surface wave is 200-1000m / s, and the speed range of the high speed surface wave is 1000-2500m / s.

[0103] Then, the following steps are performed respectively: for the rearranged data in the low frequency band, the high-speed surface waves within the high-speed speed range of the surface waves are denoised; for the rearranged data in the medium frequency band, the high-speed surface waves within the high-speed speed range of the surface waves are denoised, and protection for high-speed reflected waves is added; for the rearranged data in the low and medium frequency bands, the low-speed surface waves within the low-speed speed range of the surface waves are denoised, and protection for high-speed reflected waves is added.

[0104] Figure 9(a) to Figure 9(e)The single shot denoising effect diagram is shown. Among them, Figure 9(a) is the single shot data before the surface wave is removed, Figure 9(b) is the effect diagram after conventional surface wave denoising, and Figure 9(c) is the effect diagram after conventional surface wave denoising; Figure 9(d) is the effect diagram after surface wave denoising using the broadband and broadband surface wave denoising method of this embodiment, and Figure 9(e) is the effect diagram of surface wave denoising of this embodiment. Figure 9(b) to Figure 9(e) It can be seen that direct denoising will result in leakage of reflection signals, weakening the reflection amplitude, which is not conducive to reservoir interpretation; using the broadband and wide-speed surface wave denoising method of this embodiment for denoising, there is no leakage of reflection signals.

[0105] Figure 10(a) to Figure 10(c) Figure 10(a) shows the effect of denoising superposition. Figure 10(b) shows the effect of surface wave removal, Figure 10(c) shows the effect of surface wave removal. Figure 10(a) to Figure 10(c) It can be seen that the broadband and broadband surface roll denoising method of this embodiment removes only linear surface rolls without reflected waves, which further proves the amplitude-preserving property of the method.

[0106] For other detailed descriptions of this exemplary embodiment, reference may be made to the corresponding descriptions in the aforementioned embodiments, which will not be repeated here.

[0107] Example 3

[0108] This embodiment provides a broadband and broadband surface roll denoising device, comprising:

[0109] A data rearrangement unit, used for rearranging the cross-arrangement domain data;

[0110] A range determination unit, for determining a frequency range of a low frequency band and a mid frequency band, and determining a velocity range of a low velocity surface wave and a high velocity surface wave;

[0111] A first denoising unit is used to denoise the high-speed surface waves within the high-speed range of the surface waves for the rearranged data in the low-frequency band;

[0112] A second denoising unit is used to denoise the high-speed surface waves within the high-speed range of the surface waves for the rearranged data in the intermediate frequency band, and to provide protection for the high-speed reflected waves;

[0113] The third denoising unit is used to denoise the low-speed surface waves within the low-speed range of the surface waves for the rearranged data in the low-frequency band and the medium-frequency band, and to provide protection for the high-speed reflected waves.

[0114] In this embodiment, the cross-array domain data includes common detection line and common shot line data.

[0115] In this embodiment, rearranging the cross-arrangement domain data includes:

[0116] Determine multiple regular shot lines based on common detection line and common shot line data;

[0117] The gun line data between two adjacent regular gun lines are respectively integrated into two adjacent regular gun lines according to a predetermined rule to form two rearranged gun lines.

[0118] In this embodiment, the frequency range of the low frequency band is 0-8 Hz, the frequency range of the mid-frequency band is 8-20 Hz, the speed range of the low speed surface wave is 200-1000 m / s, and the speed range of the high speed surface wave is 1000-2500 m / s;

[0119] The high-speed reflected wave refers to a reflected wave whose wave speed is greater than a first predetermined speed, and the first predetermined speed is 4000 m / s.

[0120] In this embodiment, adding protection for high-speed reflected waves means subtracting the high-speed reflected waves from the removed surface roll noise.

[0121] For other detailed descriptions of this exemplary embodiment, reference may be made to the corresponding descriptions in the aforementioned embodiments, which will not be repeated here.

[0122] Example 4

[0123] This embodiment provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the aforementioned broadband and broadband surface roll denoising method is implemented.

[0124] A computer-readable storage medium may be a tangible device that can hold and store instructions used by an instruction execution device. A computer-readable storage medium may be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples of computer-readable storage media (a non-exhaustive list) include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disk read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanical encoding device, such as a punch card or a raised structure in a groove on which instructions are stored, and any suitable combination of the foregoing. As used herein, a computer-readable storage medium is not to be interpreted as a transient signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission medium (e.g., a light pulse through a fiber optic cable), or an electrical signal transmitted through a wire.

[0125] For other detailed descriptions of this exemplary embodiment, reference may be made to the corresponding descriptions in the aforementioned embodiments, which will not be repeated here.

[0126] Example 5

[0127] This embodiment provides an electronic device, including:

[0128] A memory storing executable instructions;

[0129] The processor runs the executable instructions in the memory to implement the aforementioned broadband and broadband surface roll denoising method.

[0130] The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to each computing / processing device, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include copper transmission cables, optical fiber transmissions, wireless transmissions, routers, firewalls, switches, gateway computers, and / or edge servers. The network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in the computer-readable storage medium in each computing / processing device.

[0131] The computer program instructions for performing the operation of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages, such as Smalltalk, C++, etc., and conventional procedural programming languages, such as "C" language or similar programming languages. Computer-readable program instructions may be executed completely on a user's computer, partially on a user's computer, as an independent software package, partially on a user's computer, partially on a remote computer, or completely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., using an Internet service provider to connect via the Internet). In some embodiments, an electronic circuit, such as a programmable logic circuit, a field programmable gate array (FPGA), or a programmable logic array (PLA), may be customized by utilizing the state information of the computer-readable program instructions, and the electronic circuit may execute the computer-readable program instructions, thereby realizing various aspects of the present disclosure.

[0132] Various aspects of the present disclosure are described herein with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to the embodiments of the present disclosure. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer-readable program instructions.

[0133] These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, thereby producing a machine, so that when these instructions are executed by the processor of the computer or other programmable data processing device, a device that implements the functions / actions specified in one or more boxes in the flowchart and / or block diagram is generated. These computer-readable program instructions can also be stored in a computer-readable storage medium, and these instructions cause the computer, programmable data processing device, and / or other equipment to work in a specific manner, so that the computer-readable medium storing the instructions includes a manufactured product, which includes instructions for implementing various aspects of the functions / actions specified in one or more boxes in the flowchart and / or block diagram.

[0134] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device so that a series of operating steps are performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the instructions executed on the computer, other programmable data processing apparatus, or other device to implement the functions / actions specified in one or more boxes in the flowchart and / or block diagram.

[0135] For other detailed descriptions of this exemplary embodiment, reference may be made to the corresponding descriptions in the aforementioned embodiments, which will not be repeated here.

[0136] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A broadband and wide-speed surface roll denoising method, It is characterized in that The method comprises: Step 1: Rearrange the cross-arrangement domain data; Step 2: Determine the frequency range of the low frequency band and the middle frequency band, and determine the speed range of the low speed and high speed of the surface wave; Step 3: for the rearranged data in the low frequency band, denoising the high-speed surface waves within the high-speed range of the surface waves; Step 4: for the rearranged data in the intermediate frequency band, denoising is performed on the high-speed surface waves within the high-speed range of the surface waves, and protection is added for the high-speed reflected waves; Step 5: For the rearranged data in the low frequency band and the medium frequency band, the low-speed surface waves within the low-speed range of the surface waves are denoised, and protection for the high-speed reflected waves is added.

2. The method according to claim 1, It is characterized in that The cross-arrangement domain data includes common detection line and common shot line data.

3. The method according to claim 2, It is characterized in that The step 1 comprises: Determine a plurality of regular shot lines based on the common detection line and common shot line data; The gun line data between two adjacent regular gun lines are respectively integrated into the two adjacent regular gun lines according to a predetermined rule to form two rearranged gun lines.

4. The method according to claim 1, It is characterized in that The frequency range of the low frequency band is 0-8 Hz, the frequency range of the medium frequency band is 8-20 Hz, the speed range of the low speed surface wave is 200-1000 m / s, and the speed range of the high speed surface wave is 1000-2500 m / s; The high-speed reflected wave refers to a reflected wave whose wave speed is greater than a first predetermined speed, and the first predetermined speed is 4000 m / s.

5. The method according to claim 4, It is characterized in that The adding of protection for high-speed reflected waves refers to subtracting the high-speed reflected waves from the removed surface wave noise.

6. A broadband and wide-speed surface wave denoising device, It is characterized in that include: A data rearrangement unit, used for rearranging the cross-arrangement domain data; A range determination unit, for determining a frequency range of a low frequency band and a mid frequency band, and determining a velocity range of a low velocity surface wave and a high velocity surface wave; A first denoising unit is used to denoise the high-speed surface waves within the high-speed range of the surface waves for the rearranged data in the low-frequency band; A second denoising unit is used to denoise the high-speed surface waves within the high-speed range of the surface waves for the rearranged data in the intermediate frequency band, and to provide protection for the high-speed reflected waves; The third denoising unit is used to denoise the low-speed surface waves within the low-speed range of the surface waves for the rearranged data in the low-frequency band and the medium-frequency band, and to provide protection for the high-speed reflected waves.

7. The device according to claim 6, It is characterized in that The cross-arrangement domain data includes common detection line and common shot line data.

8. The device according to claim 7, It is characterized in that The re-arrangement of the cross-arrangement domain data comprises: Determine a plurality of regular shot lines based on the common detection line and common shot line data; The gun line data between two adjacent regular gun lines are respectively integrated into the two adjacent regular gun lines according to a predetermined rule to form two rearranged gun lines.

9. The device according to claim 6, It is characterized in that The frequency range of the low frequency band is 0-8 Hz, the frequency range of the medium frequency band is 8-20 Hz, the speed range of the low speed surface wave is 200-1000 m / s, and the speed range of the high speed surface wave is 1000-2500 m / s; The high-speed reflected wave refers to a reflected wave whose wave speed is greater than a first predetermined speed, and the first predetermined speed is 4000 m / s.

10. The device according to claim 9, It is characterized in that The adding of protection for high-speed reflected waves refers to subtracting the high-speed reflected waves from the removed surface wave noise.

11. A computer-readable storage medium, It is characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the broadband and broadband surface roll denoising method according to any one of claims 1 to 5 is implemented.

12. An electronic device, It is characterized in that The electronic device comprises: A memory storing executable instructions; A processor, wherein the processor runs the executable instructions in the memory to implement the broadband and broadband surface roll denoising method according to any one of claims 1 to 5.

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