A method, apparatus, and electronic device for seismic signal acquisition.

Abstract

This application provides a method, apparatus, and electronic device for seismic signal acquisition. The method includes: acquiring the scanning frequency band range of a seismic source in a target exploration area; obtaining multiple scanning frequency bands based on the scanning frequency band range; wherein each of the multiple scanning frequency bands corresponds to a portion of the scanning frequency band range, and there is a frequency overlap region between adjacent scanning frequency bands; for each scanning frequency band, performing the following operations: obtaining the sampling grid corresponding to the scanning frequency band using a preset sampling grid calculation formula based on the maximum frequency in the scanning frequency band; obtaining the sampling interval corresponding to the scanning frequency band based on the sampling grid corresponding to the scanning frequency band and the frequency band range of the scanning frequency band; setting the spacing between multiple shot points in the seismic source corresponding to the scanning frequency band based on the sampling interval corresponding to the scanning frequency band, and acquiring seismic wave signal data corresponding to the scanning frequency band through the seismic source.

Description

Technical Field

[0001] This application relates to the field of geophysical exploration, and in particular to a method, apparatus, and electronic device for seismic signal acquisition. Background Technology

[0002] In recent years, due to its many advantages such as controllable frequency and energy, safety and environmental friendliness, low cost, and high construction efficiency, the application of controlled seismic sources in seismic exploration has become increasingly widespread. A controlled seismic source is used to generate signals within a certain frequency range. The generated signals are reflected from the ground and transmitted back to the surface, where they are recorded by a geophone. The recorded signals are then correlated with a theoretical reference signal to obtain seismic data.

[0003] As exploration targets become increasingly refined, seismic exploration demands wider frequency bands, making broadband exploration the mainstream technology. However, limitations in the manufacturing process of controllable seismic sources make it difficult to simultaneously handle both low and high frequencies. To address this issue, frequency-division acquisition technology has been proposed: conventional broadband signals are split into multiple narrow-band signals, such as low-frequency, mid-frequency, and high-frequency signals. Different frequency bands can be excited using different types of seismic sources, and subsequent processing yields the final broadband signal. Because frequency-division acquisition technology involves different types of seismic sources, existing construction methods limit its construction efficiency.

[0004] Therefore, improving construction efficiency is an urgent technical problem to be solved when applying frequency division acquisition technology for data acquisition. Summary of the Invention

[0005] This application provides a method, apparatus, electronic device, and storage medium for seismic signal acquisition, which can improve construction efficiency during the acquisition process using frequency division acquisition technology.

[0006] One embodiment of this application provides a method for seismic signal acquisition. The method includes: obtaining the scanning frequency band range of a seismic source in a target exploration area; obtaining multiple scanning frequency bands based on the scanning frequency band range; wherein each of the multiple scanning frequency bands corresponds to a part of the scanning frequency band range, and there is a frequency overlap region between adjacent scanning frequency bands; for each scanning frequency band, performing the following operations: obtaining the sampling grid corresponding to the scanning frequency band using a preset sampling grid calculation formula based on the maximum frequency in the scanning frequency band; obtaining the sampling interval corresponding to the scanning frequency band based on the sampling grid corresponding to the scanning frequency band and the frequency band range of the scanning frequency band; setting the spacing between multiple shot points in the seismic source corresponding to the scanning frequency band based on the sampling interval corresponding to the scanning frequency band, and acquiring seismic wave signal data corresponding to the scanning frequency band through the seismic source.

[0007] In some embodiments, the plurality of scanning frequency bands includes at least a first scanning frequency band and a second scanning frequency band. The process of obtaining the plurality of scanning frequency bands based on the scanning frequency band range includes: the first scanning frequency band being composed of scanning frequencies within the scanning frequency band range that are greater than a first scanning frequency value and less than a second scanning frequency value; and the second scanning frequency band being composed of scanning frequencies within the scanning frequency band range that are greater than a third scanning frequency value and less than a fourth scanning frequency value. Wherein, the first scanning frequency value is equal to the starting scanning frequency value of the scanning frequency band range, the second scanning frequency value is greater than the third scanning frequency value, the fourth scanning frequency value is greater than the second scanning frequency value, and the fourth scanning frequency value is less than or equal to the ending scanning frequency value of the scanning frequency band range.

[0008] In some embodiments, the preset sampling grid calculation formula is as follows:

[0009]

[0010] Where Δx is the sampling grid, v min f is the minimum velocity of the formation. max The maximum frequency in the scanning band is denoted by sinθ, and sinθ is the dip angle of the formation.

[0011] In some embodiments, the scanning frequency band is the first scanning frequency band within the scanning frequency band range. Obtaining the sampling interval corresponding to the scanning frequency band based on the sampling grid corresponding to the scanning frequency band and the frequency band range of the scanning frequency band includes: obtaining a first sampling interval corresponding to the first scanning frequency band based on the sampling grid corresponding to the first scanning frequency band and the frequency band range of the first scanning frequency band; wherein the first sampling interval is less than or equal to the sampling grid corresponding to the first scanning frequency band, and the first sampling interval is greater than the sampling intervals corresponding to other scanning frequency bands among the plurality of scanning frequency bands.

[0012] In some embodiments, obtaining the sampling interval corresponding to the scanning frequency band based on the sampling grid corresponding to the scanning frequency band and the frequency band range of the scanning frequency band includes: obtaining a first sampling interval corresponding to the first scanning frequency band based on the sampling grid corresponding to the first scanning frequency band and the frequency band range of the first scanning frequency band; and obtaining a second sampling interval corresponding to the second scanning frequency band based on the sampling grid corresponding to the second scanning frequency band and the frequency band range of the second scanning frequency band; wherein the first sampling interval is greater than the second sampling interval, the first sampling interval is less than or equal to the sampling grid corresponding to the first scanning frequency band, and the second sampling interval is less than or equal to the sampling grid corresponding to the second scanning frequency band.

[0013] In some embodiments, acquiring seismic wave signal data corresponding to the scanning frequency band via the seismic source includes: using the seismic source to excite seismic waves corresponding to the scanning frequency band; acquiring continuously recorded acquisition data; wherein the continuously recorded acquisition data includes seismic wave signal data excited by the seismic source corresponding to each of the plurality of scanning frequency bands; obtaining the acquisition data corresponding to the scanning frequency band from the continuously recorded acquisition data according to the start time of the seismic source and the scanning length of the scanning frequency band; and processing the acquisition data corresponding to the scanning frequency band using the frequency-division scanning signal corresponding to the scanning frequency band to obtain the seismic wave signal data corresponding to the scanning frequency band.

[0014] In some embodiments, the frequency division scanning signal is obtained using the following formula:

[0015]

[0016] Among them, A i (t) represents the amplitude of the frequency-divided scanning signal, f i s f is the starting scan frequency of the frequency division scan signal. i e T is the final scan frequency of the frequency division scan signal. i denoted as , where is the scan length of the frequency-divided scanning signal, and i is the index of the scan frequency band.

[0017] One embodiment of this application provides a seismic signal acquisition device, the device comprising: a first acquisition module for acquiring the scanning frequency band range of a seismic source in a target exploration area; a second acquisition module for obtaining multiple scanning frequency bands based on the scanning frequency band range; wherein each of the multiple scanning frequency bands corresponds to a portion of the scanning frequency band range, and there is a frequency overlap region between adjacent scanning frequency bands; and an acquisition module for performing the following operations for each scanning frequency band:

[0018] Based on the maximum frequency in the scanning frequency band, the sampling grid corresponding to the scanning frequency band is obtained using a preset sampling grid calculation formula; based on the sampling grid corresponding to the scanning frequency band and the frequency band range of the scanning frequency band, the sampling interval corresponding to the scanning frequency band is obtained; based on the sampling interval corresponding to the scanning frequency band, the spacing between multiple shot points in the seismic source corresponding to the scanning frequency band is set, and seismic wave signal data corresponding to the scanning frequency band is acquired through the seismic source.

[0019] This application provides an electronic device, which includes a memory and a processor. The memory stores a computer program, and the processor executes the method described above when running the program.

[0020] This application provides a storage medium for storing a computer-readable program, which, when run, performs the method described above.

[0021] The technical solutions provided in this application have at least the following advantages compared with the prior art:

[0022] In the embodiments provided in this application, the scanning frequency band range of the seismic source in the target exploration area is obtained; multiple scanning frequency bands are obtained based on the scanning frequency band range; for each scanning frequency band, the following operations are performed: based on the maximum frequency in the scanning frequency band, a preset sampling grid calculation formula is used to obtain the sampling grid corresponding to the scanning frequency band; based on the sampling grid corresponding to the scanning frequency band and the frequency band range of the scanning frequency band, the sampling interval corresponding to the scanning frequency band is obtained; based on the sampling interval corresponding to the scanning frequency band, the spacing between multiple shot points in the seismic source corresponding to the scanning frequency band is set, and seismic wave signal data corresponding to the scanning frequency band is acquired through the seismic source. This improves construction efficiency during the acquisition process using frequency division acquisition technology. Attached Figure Description

[0023] This application will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting; in these embodiments, the same reference numerals denote the same structures, wherein:

[0024] Figure 1 This is a schematic diagram illustrating an application scenario of a seismic signal acquisition method according to some embodiments of this application;

[0025] Figure 2 This is an exemplary flowchart of a method for seismic signal acquisition according to some embodiments of this application;

[0026] Figure 3A This is an exemplary schematic diagram showing the frequency band range and scanning signal of the first scanning frequency band according to some embodiments of this application;

[0027] Figure 3B This is an exemplary schematic diagram showing the frequency band range and scanning signal of the second scanning frequency band according to some embodiments of this application;

[0028] Figure 3C This is an exemplary schematic diagram showing the frequency band range and scanning signal of the third scanning frequency band according to some embodiments of this application;

[0029] Figure 4 These are exemplary schematic diagrams illustrating multiple scanning frequency bands according to some embodiments of this application;

[0030] Figure 5This is an exemplary schematic diagram showing the spacing between multiple shot points in a seismic source corresponding to different scanning frequency bands, as shown in some embodiments of this application.

[0031] Figure 6 This is an exemplary schematic diagram of a seismic signal acquisition apparatus according to some embodiments of this application;

[0032] Figure 7 This is an exemplary structural diagram of an electronic device according to some embodiments of this application. Detailed Implementation

[0033] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0034] It should be understood that the terms “system,” “device,” “unit,” and / or “module” used herein are one method of distinguishing different components, elements, parts, sections, or assemblies at different levels. However, if other words can achieve the same purpose, they may be replaced by other expressions.

[0035] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0036] Flowcharts are used in this application to illustrate the operations performed by the system according to embodiments of this application. It should be understood that the preceding or following operations are not necessarily performed precisely in sequence. Instead, the steps can be processed in reverse order or simultaneously. Furthermore, other operations can be added to these processes, or one or more steps can be removed from them.

[0037] Figure 1 This is a schematic diagram illustrating an application scenario of a seismic signal acquisition method according to some embodiments of this application.

[0038] like Figure 1 As shown, in the application scenario, it can include server 110, terminal 120 and network 130.

[0039] In some embodiments, the server 110 and the terminal 120 can interact with each other via the network 130. For example, the server 110 can obtain information and / or data from the terminal 120 via the network 130, or it can send information and / or data to the terminal 120 via the network 130.

[0040] Terminal 120 is an electronic device used by a user to obtain the sampling interval corresponding to each scanning frequency band. In some embodiments, terminal 120 can obtain the scanning frequency band range of the seismic source of the target exploration area. According to the method described in the embodiments of this application, multiple scanning frequency bands are obtained based on the scanning frequency band range, and the sampling interval corresponding to each scanning frequency band is determined. When the computing resources of terminal 120 are limited, terminal 120 can send the scanning frequency band range of the seismic source of the target exploration area to server 110. Server 110, according to the method described in the embodiments of this application, obtains multiple scanning frequency bands based on the scanning frequency band range, determines the sampling interval corresponding to each scanning frequency band, and returns the determined sampling interval corresponding to each scanning frequency band to terminal 120, so that terminal 120 can display the sampling interval corresponding to each scanning frequency band to the user. Terminal 120 can be one or any combination of a mobile device, tablet computer, or other device with input and / or output functions.

[0041] Server 110 can be a single server or a group of servers. The server group can be centralized or distributed (e.g., server 110 can be a distributed system), and can be dedicated or simultaneously provided by other devices or systems. In some embodiments, server 110 can be regional or remote. In some embodiments, server 110 can be implemented on a cloud platform or provided virtually. By way of example only, a cloud platform can include private cloud, public cloud, hybrid cloud, community cloud, distributed cloud, internal cloud, multi-tiered cloud, etc., or any combination thereof.

[0042] In some embodiments, network 130 can be any one or more of wired or wireless networks. For example, network 130 may include a local area network (LAN), a wide area network (WAN), a wireless local area network (WLAN), a metropolitan area network (MAN), or any combination thereof.

[0043] For ease of understanding, the technical solution of this application is described below with reference to the accompanying drawings and embodiments.

[0044] Figure 2 This is an exemplary flowchart of a seismic signal acquisition method according to some embodiments of this application. Figure 2 As shown, the method for seismic signal acquisition includes the following steps:

[0045] Step S210: Obtain the scanning frequency band range of the seismic source in the target exploration area.

[0046] In the specific implementation process, the scanning frequency band range of the target exploration area's seismic sources can be selected based on the geological objectives to be achieved and relevant historical seismic exploration data. The scanning frequency band range includes the starting and ending scanning frequencies of signals excited by multiple sources. For example, ... Figure 4 As shown, the scanning frequency range is 2-100 Hz, the starting scanning frequency is 2 Hz, and the ending scanning frequency is 100 Hz.

[0047] Step S220: Based on the scanning frequency band range, multiple scanning frequency bands are obtained; wherein each of the multiple scanning frequency bands corresponds to a part of the scanning frequency band range, and there is a frequency overlap region between adjacent scanning frequency bands.

[0048] In practical implementation, multiple scanning frequency bands can be obtained based on the type of seismic source used for construction in the target exploration area. Within the operating frequency range of its corresponding seismic source, each scanning frequency band has frequency overlap between adjacent bands to obtain continuous seismic wave signals. For example, if the seismic sources used for construction in the target exploration area include three types: sources capable of generating low-frequency signals, sources capable of generating mid-frequency signals, and sources capable of generating high-frequency signals, then three scanning frequency bands corresponding to low-frequency, mid-frequency, and high-frequency signals can be obtained based on the scanning frequency band range. As another example, if the seismic sources used for construction in the target exploration area include two types: sources capable of generating low-frequency signals and sources capable of generating mid- and high-frequency signals, then two scanning frequency bands corresponding to low-frequency and mid- to high-frequency signals can be obtained based on the scanning frequency band range.

[0049] In some embodiments, the multiple scanning frequency bands include at least a first scanning frequency band and a second scanning frequency band. The first scanning frequency band can be composed of scanning frequencies within the scanning frequency band range that are greater than the first scanning frequency value and less than the second scanning frequency value; the second scanning frequency band can be composed of scanning frequencies within the scanning frequency band range that are greater than the third scanning frequency value and less than the fourth scanning frequency value. Wherein, the first scanning frequency value is equal to the starting scanning frequency value of the scanning frequency band range, the second scanning frequency value is greater than the third scanning frequency value, the fourth scanning frequency value is greater than the second scanning frequency value, and the fourth scanning frequency value is less than or equal to the ending scanning frequency value of the scanning frequency band range.

[0050] For example only, such as Figure 4 As shown, the multiple scanning frequency bands include three scanning frequency bands: the first scanning frequency band (frequency band range and scanning signal are as follows) Figure 3A As shown), the frequency range is 2-12 Hz; the second scanning frequency band (frequency band range and scanning signal are shown) Figure 3B As shown), the frequency range is 10-60 Hz; the third scanning band (band range and scanning signal are shown) Figure 3C(As shown), the frequency range is 55-100 Hz. In specific implementations, multiple scanning frequencies may also include two, four, or more scanning frequency bands, and are not limited to the description in this specification.

[0051] For each scanning frequency band, the operations described in the following steps can be performed.

[0052] Step S230: Based on the maximum frequency in the scanning frequency band, the sampling grid corresponding to the scanning frequency band is obtained using the preset sampling grid calculation formula.

[0053] In practical implementation, the sampling interval needs to meet the requirement of spatially alias-free sampling; therefore, it is necessary to calculate the sampling grid corresponding to each scanning frequency band. The preset sampling grid calculation formula is as follows:

[0054]

[0055] In formula (1), Δx is the sampling grid, v min f is the minimum velocity of the formation. max θ is the maximum frequency in the scanning band, and sinθ is the dip angle of the formation.

[0056] As can be seen from formula (1), different frequencies of signals have different requirements for spatial sampling intervals. Low-frequency signals have long wavelengths and require larger sampling intervals, while medium- and high-frequency signals have short wavelengths and require smaller sampling intervals.

[0057] Step S240: Obtain the sampling interval corresponding to the scanning frequency band based on the sampling grid and the frequency band range of the scanning frequency band.

[0058] In practice, different sampling intervals can be set for different scanning frequency bands, and the sampling interval needs to be greater than the sampling grid corresponding to the scanning frequency band calculated in step S230. For example, a larger sampling interval can be set for scanning frequency bands in the low-frequency range, while a smaller sampling interval can be set for scanning frequency bands in the mid- and high-frequency ranges.

[0059] In some embodiments, the scanning frequency band is the first scanning frequency band within the scanning frequency band range. The first sampling interval corresponding to the first scanning frequency band can be obtained based on the sampling grid corresponding to the first scanning frequency band and the frequency band range of the first scanning frequency band. The first sampling interval is less than or equal to the sampling grid corresponding to the first scanning frequency band, and the first sampling interval is greater than the sampling intervals corresponding to other scanning frequency bands among the multiple scanning frequency bands. For example only, the scanning frequency band is... Figure 4 The first scanning frequency band shown can be set as the first sampling interval, which is 60 meters, greater than the sampling intervals (e.g., 40 meters or 20 meters) corresponding to other scanning frequency bands (e.g., the second scanning frequency band and the third scanning frequency band).

[0060] In some embodiments, the plurality of scanning frequency bands includes at least a first scanning frequency band and a second scanning frequency band. A first sampling interval corresponding to the first scanning frequency band can be obtained based on the sampling grid corresponding to the first scanning frequency band and the frequency band range of the first scanning frequency band. A second sampling interval corresponding to the second scanning frequency band can be obtained based on the sampling grid corresponding to the second scanning frequency band and the frequency band range of the second scanning frequency band. Wherein, the first sampling interval is greater than the second sampling interval, the first sampling interval is less than or equal to the sampling grid corresponding to the first scanning frequency band, and the second sampling interval is less than or equal to the sampling grid corresponding to the second scanning frequency band.

[0061] For example only, such as Figure 4 As shown, the multiple scanning frequency bands include a first scanning frequency band, a second scanning frequency band, and a third scanning frequency band. The sampling interval corresponding to the first scanning frequency band can be set as the first sampling interval, with a value of 60 meters; the sampling interval corresponding to the second scanning frequency band can be set as the second sampling interval, with a value of 40 meters; and the sampling interval corresponding to the third scanning frequency band can be set as the third sampling interval, with a value of 20 meters.

[0062] Step S250: Based on the sampling interval corresponding to the scanning frequency band, set the spacing between multiple shot points in the source corresponding to the scanning frequency band, and acquire seismic wave signal data corresponding to the scanning frequency band through the source.

[0063] In the specific implementation process, after determining the sampling interval corresponding to different scanning frequency bands, the spacing between multiple shot points in the source corresponding to the scanning frequency band can be set according to the sampling interval corresponding to the scanning frequency band. Figure 5 It shows Figure 4 The spacing between multiple shot points in seismic sources corresponding to different scanning frequency bands (first scanning frequency band, second scanning frequency band, and third scanning frequency band) is set. Each seismic source can perform construction acquisition according to the set spacing, and the acquisition methods include, but are not limited to, sliding scanning technology and dynamic scanning technology.

[0064] In practice, for ease of construction, the geophones installed in the target exploration area can be spaced at the same interval, or different intervals can be set for geophones corresponding to different scanning frequency bands, without being limited by the description in this manual.

[0065] In some embodiments, seismic wave signal data corresponding to each scanning frequency band can be obtained through the following steps.

[0066] Using a seismic source, seismic waves corresponding to its scanning frequency band are excited. Specifically, the seismic source generates a finite bandwidth signal with uniform amplitude within its corresponding scanning frequency band and transmits this signal underground, thereby exciting seismic waves. Different seismic sources excite seismic waves within different frequency bands.

[0067] The process involves acquiring continuously recorded data, which includes seismic wave signals generated by sources corresponding to multiple scanning frequency bands. Specifically, a receiver array composed of detectors can be used to receive seismic waves and obtain continuously recorded data.

[0068] Based on the start time of the seismic source and the scanning length of the scanning frequency band, the acquisition data corresponding to the scanning frequency band is obtained from the continuously recorded acquisition data.

[0069] By using the frequency-division scanning signal corresponding to the scanning frequency band, the acquired data corresponding to the scanning frequency band is processed to obtain the seismic wave signal data corresponding to the scanning frequency band.

[0070] In practice, frequency-division scanning signals can be obtained in various ways. As an example, the frequency-division scanning signal corresponding to each scanning band can be obtained using the following formula:

[0071]

[0072] Among them, A i (t) represents the amplitude of the frequency-divided scanning signal, f i s f is the starting scan frequency of the frequency division scan signal. i e T is the final scan frequency of the frequency division scan signal. i denoted as , where is the scan length of the frequency-divided scanning signal, and i is the index of the scan frequency band.

[0073] In the embodiments provided in this application, the sampling interval corresponding to the scanning frequency band is obtained based on the sampling grid and the frequency band range of the scanning frequency band; the spacing between multiple shot points in the seismic source corresponding to the scanning frequency band is set according to the sampling interval, and seismic wave signal data corresponding to the scanning frequency band is acquired through the seismic source. Since different sampling intervals are used for sampling different scanning frequency bands, data redundancy can be effectively reduced and construction efficiency can be improved.

[0074] Figure 6 This is an exemplary schematic diagram of a seismic signal acquisition apparatus according to some embodiments of this application.

[0075] like Figure 6 As shown, the seismic signal acquisition device includes: a first acquisition module 610, a second acquisition module 620, and an acquisition module 630.

[0076] The first acquisition module 610 is used to acquire the scanning frequency band range of the seismic source in the target exploration area.

[0077] The second acquisition module 620 is used to obtain multiple scanning frequency bands according to the scanning frequency band range; wherein each of the multiple scanning frequency bands corresponds to a part of the scanning frequency band range, and there is a frequency overlap region between adjacent scanning frequency bands.

[0078] The acquisition module 630 is used to perform the following operations for each scan frequency band:

[0079] Based on the maximum frequency in the scanning frequency band, the sampling grid corresponding to the scanning frequency band is obtained using a preset sampling grid calculation formula; based on the sampling grid corresponding to the scanning frequency band and the frequency band range of the scanning frequency band, the sampling interval corresponding to the scanning frequency band is obtained; based on the sampling interval corresponding to the scanning frequency band, the spacing between multiple shot points in the seismic source corresponding to the scanning frequency band is set, and seismic wave signal data corresponding to the scanning frequency band is acquired through the seismic source.

[0080] In some embodiments, the plurality of scanning frequency bands includes at least a first scanning frequency band and a second scanning frequency band. The process of obtaining the plurality of scanning frequency bands based on the scanning frequency band range includes: the first scanning frequency band being composed of scanning frequencies within the scanning frequency band range that are greater than a first scanning frequency value and less than a second scanning frequency value; and the second scanning frequency band being composed of scanning frequencies within the scanning frequency band range that are greater than a third scanning frequency value and less than a fourth scanning frequency value. Wherein, the first scanning frequency value is equal to the starting scanning frequency value of the scanning frequency band range, the second scanning frequency value is greater than the third scanning frequency value, the fourth scanning frequency value is greater than the second scanning frequency value, and the fourth scanning frequency value is less than or equal to the ending scanning frequency value of the scanning frequency band range.

[0081] In some embodiments, the preset sampling grid calculation formula is as follows:

[0082]

[0083] Where Δx is the sampling grid, v min f is the minimum velocity of the formation. max The maximum frequency in the scanning band is denoted by sinθ, and sinθ is the dip angle of the formation.

[0084] In some embodiments, the scanning frequency band is the first scanning frequency band within the scanning frequency band range. Obtaining the sampling interval corresponding to the scanning frequency band based on the sampling grid corresponding to the scanning frequency band and the frequency band range of the scanning frequency band includes: obtaining a first sampling interval corresponding to the first scanning frequency band based on the sampling grid corresponding to the first scanning frequency band and the frequency band range of the first scanning frequency band; wherein the first sampling interval is less than or equal to the sampling grid corresponding to the first scanning frequency band, and the first sampling interval is greater than the sampling intervals corresponding to other scanning frequency bands among the plurality of scanning frequency bands.

[0085] In some embodiments, obtaining the sampling interval corresponding to the scanning frequency band based on the sampling grid corresponding to the scanning frequency band and the frequency band range of the scanning frequency band includes: obtaining a first sampling interval corresponding to the first scanning frequency band based on the sampling grid corresponding to the first scanning frequency band and the frequency band range of the first scanning frequency band; and obtaining a second sampling interval corresponding to the second scanning frequency band based on the sampling grid corresponding to the second scanning frequency band and the frequency band range of the second scanning frequency band; wherein the first sampling interval is greater than the second sampling interval, the first sampling interval is less than or equal to the sampling grid corresponding to the first scanning frequency band, and the second sampling interval is less than or equal to the sampling grid corresponding to the second scanning frequency band.

[0086] In some embodiments, acquiring seismic wave signal data corresponding to the scanning frequency band via the seismic source includes: using the seismic source to excite seismic waves corresponding to the scanning frequency band; acquiring continuously recorded acquisition data; wherein the continuously recorded acquisition data includes seismic wave signal data excited by the seismic source corresponding to each of the plurality of scanning frequency bands; obtaining the acquisition data corresponding to the scanning frequency band from the continuously recorded acquisition data according to the start time of the seismic source and the scanning length of the scanning frequency band; and processing the acquisition data corresponding to the scanning frequency band using the frequency-division scanning signal corresponding to the scanning frequency band to obtain the seismic wave signal data corresponding to the scanning frequency band.

[0087] In some embodiments, the frequency division scanning signal is obtained using the following formula:

[0088]

[0089] Among them, A i (t) represents the amplitude of the frequency-divided scanning signal, f i s f is the starting scan frequency of the frequency division scan signal. i e T is the final scan frequency of the frequency division scan signal. i denoted as , where is the scan length of the frequency-divided scanning signal, and i is the index of the scan frequency band.

[0090] In the embodiments of the above-mentioned seismic signal acquisition device, the specific processing of each module and its resulting technical effects can be referred to the relevant descriptions in the corresponding method embodiments, which will not be repeated here.

[0091] Figure 7 This is an exemplary structural diagram of an electronic device according to some embodiments of this application.

[0092] like Figure 7 As shown, the electronic device includes: at least one processor 701, at least one communication interface 702, at least one memory 703, and at least one communication bus 704. Optionally, the communication interface 702 can be an interface for a communication module, such as the interface for a GSM module. The processor 701 may be a CPU, an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention. The memory 703 may include high-speed RAM or non-volatile memory, such as at least one disk storage device. The memory 703 stores a program, and the processor 701 calls the program stored in the memory 703 to execute some or all of the above-described method embodiments.

[0093] This application relates to a storage medium for storing a computer-readable program, which, when run, performs some or all of the above-described method embodiments.

[0094] Optionally, the storage medium may be a non-transitory computer-readable storage medium, such as a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device.

[0095] Based on the same inventive concept, this application also provides a computer program product, including a computer program that, when executed by a processor, implements some or all of the above-described method embodiments.

[0096] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0097] Furthermore, this application uses specific terms to describe its embodiments. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this application do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application can be appropriately combined.

[0098] Furthermore, unless expressly stated in the claims, the order of processing elements and sequences, the use of numbers and letters, or other names described in this application are not intended to limit the order of the processes and methods of this application. Although the foregoing disclosure has discussed some currently considered useful embodiments of the invention through various examples, it should be understood that such details are for illustrative purposes only, and the appended claims are not limited to the disclosed embodiments; rather, the claims are intended to cover all modifications and equivalent combinations that conform to the substance and scope of the embodiments of this application. For example, while the system components described above can be implemented using hardware devices, they can also be implemented solely through software solutions, such as installing the described system on existing servers or mobile devices.

[0099] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments of the invention, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0100] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of scope in some embodiments of this application are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0101] For each patent, patent application, patent application publication, and other material such as articles, books, specifications, publications, and documents referenced in this application, the entire contents of that patent are incorporated herein by reference. This excludes historical application documents that are inconsistent with or conflict with the content of this application, as well as documents that limit the broadest scope of the claims in this application (currently or subsequently appended to this application). It should be noted that if there are any inconsistencies or conflicts between the descriptions, definitions, and / or terminology used in the supplementary materials of this application and the content of this application, the descriptions, definitions, and / or terminology used in this application shall prevail.

[0102] Finally, it should be understood that the embodiments described in this application are merely illustrative of the principles of the embodiments of this application. Other modifications may also fall within the scope of this application. Therefore, alternative configurations of the embodiments of this application are considered as examples and not limitations, and are regarded as consistent with the teachings of this application. Accordingly, the embodiments of this application are not limited to the embodiments explicitly described and illustrated in this application.

Claims

1. A method for seismic signal acquisition, characterized in that, The method includes: Obtain the scanning frequency band range of the seismic source in the target exploration area; Based on the scanning frequency band range, multiple scanning frequency bands are obtained; wherein each of the multiple scanning frequency bands corresponds to a part of the scanning frequency band range, and there is a frequency overlap region between adjacent scanning frequency bands; For each scan frequency band, perform the following operations: Based on the maximum frequency in the scanning frequency band, the sampling grid corresponding to the scanning frequency band is obtained using a preset sampling grid calculation formula; The sampling interval corresponding to the scanning frequency band is obtained based on the sampling grid corresponding to the scanning frequency band and the frequency band range of the scanning frequency band; Based on the sampling interval corresponding to the scanning frequency band, the spacing between multiple shot points in the seismic source corresponding to the scanning frequency band is set, and seismic wave signal data corresponding to the scanning frequency band is acquired through the seismic source.

2. The method according to claim 1, characterized in that, The plurality of scanning frequency bands includes at least a first scanning frequency band and a second scanning frequency band, and the process of obtaining the plurality of scanning frequency bands based on the scanning frequency band range includes: The first scanning frequency band is composed of scanning frequencies within the scanning frequency band range that are greater than the first scanning frequency value and less than the second scanning frequency value; The second scanning frequency band is composed of scanning frequencies within the scanning frequency band range that are greater than the third scanning frequency value and less than the fourth scanning frequency value; Wherein, the first scanning frequency value is equal to the starting scanning frequency value of the scanning frequency band, the second scanning frequency value is greater than the third scanning frequency value, the fourth scanning frequency value is greater than the second scanning frequency value, and the fourth scanning frequency value is less than or equal to the ending scanning frequency value of the scanning frequency band.

3. The method according to claim 1, characterized in that, The formula for calculating the preset sampling grid is as follows: Where Δx is the sampling grid, v min f is the minimum velocity of the formation. max The maximum frequency in the scanning band is denoted by sinθ, and sinθ is the dip angle of the formation.

4. The method according to claim 1 or 2, characterized in that, The scanning frequency band is the first scanning frequency band within the scanning frequency band range. Obtaining the sampling interval corresponding to the scanning frequency band based on the sampling grid corresponding to the scanning frequency band and the frequency band range of the scanning frequency band includes: A first sampling interval is obtained based on the sampling grid corresponding to the first scanning frequency band and the frequency band range of the first scanning frequency band; wherein, the first sampling interval is less than or equal to the sampling grid corresponding to the first scanning frequency band, and the first sampling interval is greater than the sampling interval corresponding to other scanning frequency bands among the plurality of scanning frequency bands.

5. The method according to claim 2, characterized in that, The step of obtaining the sampling interval corresponding to the scanning frequency band based on the sampling grid corresponding to the scanning frequency band and the frequency band range of the scanning frequency band includes: Based on the sampling grid corresponding to the first scanning frequency band and the frequency band range of the first scanning frequency band, the first sampling interval corresponding to the first scanning frequency band is obtained; The second sampling interval corresponding to the second scanning frequency band is obtained based on the sampling grid corresponding to the second scanning frequency band and the frequency band range of the second scanning frequency band; Wherein, the first sampling interval is greater than the second sampling interval, the first sampling interval is less than or equal to the sampling grid corresponding to the first scanning frequency band, and the second sampling interval is less than or equal to the sampling grid corresponding to the second scanning frequency band.

6. The method according to claim 1, characterized in that, The acquisition of seismic wave signal data corresponding to the scanning frequency band through the earthquake source includes: Using the aforementioned seismic source, seismic waves corresponding to the scanning frequency band are excited; Acquire continuously recorded data; wherein the continuously recorded data includes seismic wave signal data excited by the sources corresponding to each of the multiple scanning frequency bands; Based on the start-up time of the seismic source and the scanning length of the scanning frequency band, the acquisition data corresponding to the scanning frequency band is obtained from the continuously recorded acquisition data; By using the frequency-division scanning signal corresponding to the scanning frequency band, the acquired data corresponding to the scanning frequency band is processed to obtain the seismic wave signal data corresponding to the scanning frequency band.

7. The method according to claim 6, characterized in that, The frequency division scanning signal is obtained using the following formula: Among them, A i (t) represents the amplitude of the frequency-divided scanning signal, f i s This is the starting scan frequency of the frequency division scan signal. T is the final scan frequency of the frequency division scan signal. i denoted as , where is the scan length of the frequency-divided scanning signal, and i is the index of the scan frequency band.

8. A device for seismic signal acquisition, characterized in that, The device includes: The first acquisition module is used to acquire the scanning frequency band range of the seismic source in the target exploration area; The second acquisition module is used to obtain multiple scanning frequency bands based on the scanning frequency band range; wherein each of the multiple scanning frequency bands corresponds to a part of the scanning frequency band range, and there is a frequency overlap region between adjacent scanning frequency bands; The acquisition module performs the following operations for each scan frequency band: Based on the maximum frequency in the scanning frequency band, the sampling grid corresponding to the scanning frequency band is obtained using a preset sampling grid calculation formula; The sampling interval corresponding to the scanning frequency band is obtained based on the sampling grid corresponding to the scanning frequency band and the frequency band range of the scanning frequency band; Based on the sampling interval corresponding to the scanning frequency band, the spacing between multiple shot points in the seismic source corresponding to the scanning frequency band is set, and seismic wave signal data corresponding to the scanning frequency band is acquired through the seismic source.

9. An electronic device comprising a memory and a processor, the memory storing a computer program, the processor executing the method as described in any one of claims 1 to 7 when running the program.

10. A storage medium for storing a computer-readable program, which, when executed, performs the method as claimed in any one of claims 1 to 7.

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