Drill seismic source signal acquisition method, device, equipment and medium
By deploying seismic detectors downhole and at the wellhead to acquire seismic wave reference signals and processing the signals using compressed sensing inversion technology, the problem of inaccurate acquisition of drill bit source signals was solved, achieving high-quality seismic data acquisition and supporting seismic imaging while drilling.
Patent Information
- Application Number
- CN202410980421.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2026-01-23
AI Technical Summary
Existing technologies struggle to effectively acquire reliable drill bit source signals, making it difficult to determine seismic wave propagation time and affecting the accuracy of seismic imaging while drilling.
Seismic detectors are deployed downhole and at the wellhead to acquire first and second seismic wave reference signals. These signals are then processed using compressed sensing inversion technology to generate the target seismic record. Reliable drill bit source signals are obtained using seismic wavelet characteristics.
This improved the reliability and resolution of the drill bit source signal, provided high-quality seismic data, and laid the foundation for subsequent seismic data processing while drilling.
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Figure CN121385973A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of seismic exploration technology, and particularly relates to a drill bit seismic source signal acquisition method, device, equipment and medium. BACKGROUND
[0002] Seismic exploration technology is one of important means for finding oil and natural gas at present. When drilling, a drill bit seismic source is used to excite in the well, and a seismic detector is used to observe on the ground to extract effective direct wave and reflected wave signals, which can provide velocity update basis and well imaging data for seismic exploration imaging. Drilling-while-seismic data processing based on a drill bit excitation seismic source usually includes signal extraction, velocity update, advance prediction and the like, and among them, acquiring effective drill bit seismic source signals is the basis for subsequent processing. SUMMARY
[0003] Therefore, the present application aims to provide a drill bit seismic source signal acquisition method, device, equipment and medium, which can acquire reliable drill bit seismic source signals and provide high-quality seismic data for subsequent drilling-while-seismic data processing. The specific scheme is as follows:
[0004] In a first aspect, the present application discloses a drill bit seismic source signal acquisition method, comprising:
[0005] In the downhole excitation process of drilling-while-seismic, a first seismic detector and a second seismic detector are arranged at the drill bit and within a preset range of the wellhead respectively to obtain corresponding first seismic wave reference signals and second seismic wave reference signals;
[0006] A seismic wavelet signal is determined based on the first seismic wave reference signals and the second seismic wave reference signals, and a target seismic record is generated by using the seismic wavelet signal and seismic wave data collected by a third seismic detector arranged on the ground;
[0007] The target seismic record is processed by using a compressed sensing inversion technology to obtain a target drill bit seismic source signal.
[0008] Optionally, the determination of the seismic wavelet signal based on the first seismic wave reference signals and the second seismic wave reference signals comprises:
[0009] It is judged whether the signal quality of the first seismic wave reference signal meets a first preset condition;
[0010] When the first seismic wave reference signal meets the first preset condition, the first seismic wave signal is taken as a target reference signal, and then the target reference signal is processed to obtain the seismic wavelet signal;
[0011] when the first seismic wave reference signal does not satisfy the first preset condition, judging whether a signal quality of the second seismic wave reference signal satisfies a second preset condition;
[0012] when the signal quality of the second seismic wave reference signal satisfies the second preset condition, taking the second seismic wave signal as a target reference signal, and then processing the target reference signal to obtain the seismic wavelet signal;
[0013] when the signal quality of the second seismic wave reference signal does not satisfy the second preset condition, respectively denoising the first seismic wave reference signal and the second seismic wave reference signal, and determining the seismic wavelet signal based on the seismic wave data collected by the third seismic detector arranged on the ground.
[0014] Optionally, the processing of the target reference signal to obtain the seismic wavelet signal comprises:
[0015] respectively compensating the amplitude and the frequency of the target reference signal based on a seismic wave attenuation theory method to obtain the seismic wavelet signal.
[0016] Optionally, the denoising of the first seismic wave reference signal and the second seismic wave reference signal, and the determination of the seismic wavelet signal based on the seismic wave data collected by the third seismic detector arranged on the ground, comprises:
[0017] respectively denoising the first seismic wave reference signal and the second seismic wave reference signal to obtain corresponding denoised signals;
[0018] performing wavelet shaping regularization on the denoised signals and the seismic wave data collected by the third seismic detector arranged on the ground to determine the seismic wavelet signal.
[0019] Optionally, before the generating of the target seismic record by using the seismic wavelet signal and the seismic wave data collected by the third seismic detector arranged on the ground, the method further comprises:
[0020] performing denoising preprocessing on the seismic wave data collected by the third seismic detector arranged on the ground to obtain denoised preprocessed data;
[0021] Correspondingly, the generating of the target seismic record by using the seismic wavelet signal and the seismic wave data collected by the third seismic detector arranged on the ground comprises:
[0022] generating the target seismic record by using the seismic wavelet signal and the denoised preprocessed data.
[0023] Optionally, the generating the target seismic record by using the seismic wave data collected by the third seismic detector and the seismic wavelet signal comprises:
[0024] The generating the target seismic record by using the seismic wave data collected by the third seismic detector and the seismic wavelet signal comprises:
[0025] Optionally, the processing the target seismic record by using the compressed sensing inversion technology to obtain the target bit source signal comprises:
[0026] The processing the target seismic record by using the compressed sensing inversion technology to obtain the target bit source signal comprises:
[0027] The processing the target seismic record by using the compressed sensing inversion technology to obtain the target bit source signal comprises:
[0028] The determination formula of the reflection coefficient is ; wherein, represents a target equation, d is the target seismic record, w is a cross-correlation seismic wavelet, r is the reflection coefficient, , is a regularization coefficient, is a cross-correlation result of the second seismic wave reference signal and the seismic wavelet signal, is a norm operation, and C is a counting function; t is time, .
[0029] In a second aspect, the application discloses a bit source signal acquisition device, which comprises:
[0030] A reference signal acquisition module is configured to arrange a first seismic detector and a second seismic detector in a preset range of a drill bit and a wellhead respectively during a downhole excitation process of a while-drilling seismic operation, so as to obtain corresponding first and second seismic wave reference signals.
[0031] A seismic record generation module is configured to determine a seismic wavelet signal based on the first and second seismic wave reference signals, and generate a target seismic record by using seismic wave data collected by a third seismic detector arranged on the ground.
[0032] A bit source signal acquisition module is configured to process the target seismic record by using a compressed sensing inversion technology, so as to obtain a target bit source signal.
[0033] In a third aspect, the present application discloses an electronic device, comprising a processor and a memory; wherein the memory is configured to store a computer program, and the computer program is loaded and executed by the processor to implement the drill bit seismic source signal acquisition method as described above.
[0034] In a fourth aspect, the present application discloses a computer readable storage medium configured to store a computer program; wherein the computer program is executed by a processor to implement the drill bit seismic source signal acquisition method as described above.
[0035] The present application provides a drill bit seismic source signal acquisition method, comprising: during downhole excitation of seismic while drilling, respectively arranging a first seismic detector and a second seismic detector at a drill bit and a preset range of a wellhead to obtain corresponding first seismic wave reference signals and second seismic wave reference signals; determining a seismic wavelet signal based on the first seismic wave reference signals and the second seismic wave reference signals, and generating a target seismic record by using the seismic wavelet signal and seismic wave data collected by a third seismic detector arranged on the ground; and processing the target seismic record by using a compressed sensing inversion technology to obtain a target drill bit seismic source signal.
[0036] The present application has the beneficial technical effects that: the seismic detectors are arranged at the wellhead and the drill bit respectively to obtain reference signals, which can be used as reference signals for correction on one hand, and can avoid the near-field effect of the drill bit detector on the other hand. The reliable seismic wavelet signal determined by using the reference signals obtained by the two detectors is then used to generate a more reliable target seismic record with the seismic wave data received on the ground, and the target seismic record is further processed by using the compressed sensing inversion technology, which effectively utilizes the source wavelet characteristics, and can obtain a drill bit seismic source signal with higher reliability, resolution and signal-to-noise ratio, thereby providing high-quality seismic data for subsequent seismic while drilling data processing.
[0037] In addition, the drill bit seismic source signal acquisition device, equipment and storage medium provided by the present application correspond to the drill bit seismic source signal acquisition method described above, and have the same effects. BRIEF DESCRIPTION OF DRAWINGS
[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on the provided drawings.
[0039] Figure 1 A drill bit seismic source signal acquisition method flowchart is disclosed in the present application.
[0040] Figure 2 A drill bit seismic source signal acquisition device structure schematic diagram disclosed by the present application is provided.
[0041] Figure 3 An electronic equipment structure diagram disclosed by the present application is provided. DETAILED DESCRIPTION
[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.
[0043] At present, the drill bit seismic source firing time cannot be determined, which leads to the difficulty in obtaining the seismic wave propagation time, and brings difficulty to effective direct wave signal extraction. Effective direct wave signal extraction is a key prerequisite for seismic imaging while drilling technology. The current method usually uses near-surface noise suppression to obtain relatively clear direct wave while drilling, or finally determines the direct wave sequence while drilling according to the correlation value change of multi-channel seismic data. This method is greatly affected by the observation system. Although the drill bit excitation is used as the seismic source, it is difficult to obtain the drill bit seismic source information only by near-surface noise suppression and conventional cross-correlation method.
[0044] Therefore, the present application provides a drill bit seismic source signal acquisition scheme, which can obtain reliable drill bit seismic source signals and provide high-quality seismic data for subsequent seismic data processing while drilling.
[0045] The embodiments of the present application disclose a drill bit seismic source signal acquisition method, referring to Figure 1 The method comprises the following steps.
[0046] Step S11: In the downhole excitation process of seismic while drilling, a first seismic detector and a second seismic detector are arranged at the drill bit and within a preset range of the wellhead respectively to obtain corresponding first seismic wave reference signals and second seismic wave reference signals.
[0047] In the embodiments of the present application, in the downhole excitation process of seismic while drilling, the seismic detectors are arranged at the drill bit corresponding to the excitation point and the wellhead respectively, and two seismic wave reference signals are obtained.
[0048] In a specific embodiment, in the process of drilling the drill bit, a seismic detector is arranged at the drill bit to record the seismic wave reference signal 1 at the drill bit seismic source firing time, denoted as w1; in another specific embodiment, a seismic detector is arranged at the near-wellhead, that is, within the preset range of the wellhead, for example, within 2m of the well wall or the well, to record the seismic wave reference signal 2 of the drill bit excitation source propagating to the wellhead through the well wall, denoted as w2.
[0049] It can be understood that, by arranging the geophones at the wellhead and downhole respectively and obtaining the reference signals, on one hand, the two reference signals obtained can be used as the reference signal correction; on the other hand, the near-field effect of the drill bit geophone is avoided, and the geophone at the wellhead can be used for the main extraction of the reference signal.
[0050] Step S12: determining a seismic wavelet signal based on the first seismic wave reference signal and the second seismic wave reference signal, and generating a target seismic record by using the seismic wavelet signal and seismic wave data collected by a third geophone arranged on the ground.
[0051] In the embodiment of the present application, the two reference signals obtained are comprehensively processed and analyzed to obtain a relatively stable seismic wavelet signal. The seismic wavelet signal is obtained by comparing the two seismic wave reference signals, and the specific steps include the following steps:
[0052] Step one: judging whether the signal quality of the first seismic wave reference signal meets a first preset condition.
[0053] Firstly, the signal quality of the first seismic wave reference signal is judged, for example, whether the waveform of the first seismic wave reference signal is complete, whether it has a high signal-to-noise ratio, etc.
[0054] Step two: when the first seismic wave reference signal meets the first preset condition, the first seismic wave signal is taken as a target reference signal, and then the target reference signal is processed to obtain the seismic wavelet signal.
[0055] In a specific embodiment, if the waveform of the first seismic wave reference signal is relatively complete and the signal-to-noise ratio is high, the first seismic wave reference signal is preferentially selected as the main reference signal, that is, the first seismic wave signal is taken as the target reference signal. Further, the target reference signal is processed to obtain the seismic wavelet signal.
[0056] Step three: when the first seismic wave reference signal does not meet the first preset condition, judging whether the signal quality of the second seismic wave reference signal meets a second preset condition.
[0057] In another specific embodiment, if the waveform of the first seismic wave reference signal is greatly affected by the near-field effect of the seismic excitation, and thus the signal quality of the first seismic wave reference signal is poor, at this time, the signal quality of the second seismic wave reference signal is judged to judge whether the signal quality of the second seismic wave reference signal meets the second preset condition.
[0058] Step four: when the signal quality of the second seismic wave reference signal meets the second preset condition, the second seismic wave signal is taken as a target reference signal, and then the target reference signal is processed to obtain the seismic wavelet signal.
[0059] If the signal quality of the second seismic wave reference signal meets the second preset condition, that is, has higher signal quality, the second seismic wave reference signal is selected as the main reference signal at this time, that is, the second seismic wave signal is taken as the target reference signal. Further, the target reference signal is processed to obtain the seismic wavelet signal.
[0060] Step five: when the signal quality of the second seismic wave reference signal does not meet the second preset condition, the first seismic wave reference signal and the second seismic wave reference signal are denoised respectively, and the seismic wave data collected by the third seismic wave detector arranged on the ground is used to determine the seismic wavelet signal.
[0061] If the signal quality of the second seismic wave reference signal does not meet the second preset condition, at this time, the signal quality of the first seismic wave reference signal and the second seismic wave reference signal is poor. At this time, after the reference signal is appropriately denoised, such as filtering, wavelet analysis, etc., the final seismic wavelet signal is obtained by using the wavelet shaping regularization method with the data obtained by the seismic wave detector arranged on the ground.
[0062] Specifically, the first seismic wave reference signal and the second seismic wave reference signal are denoised respectively to obtain corresponding denoised signals; the seismic wavelet signal is determined by using the wavelet shaping regularization of the denoised signals and the seismic wave data collected by the third seismic wave detector arranged on the ground. It can be understood that in addition to arranging the detectors at the wellhead and downhole, the seismic wave detectors are also arranged on the ground. The seismic wave generated in the underground excitation process is recorded by arranging the seismic wave detector line or three-dimensional line on the ground. In addition, the seismic signals obtained by the other seismic wave detectors arranged on the ground need to be denoised and preprocessed to obtain the denoised and preprocessed data; correspondingly, when generating the target seismic record, the seismic wavelet signal and the denoised and preprocessed data are used to generate the target seismic record.
[0063] It should be noted that, after taking the first seismic wave reference signal or the second seismic wave reference signal as a target reference signal, the process of processing the target reference signal to obtain the seismic wavelet signal includes: based on a seismic wave attenuation theory method, respectively compensating the amplitude and frequency of the target reference signal in reverse to obtain the seismic wavelet signal. Wherein, the reverse compensation of amplitude and frequency according to the seismic wave attenuation theory method includes but is not limited to: geometric diffusion compensation, inversion wavelet and the like. Finally, the obtained seismic wavelet signal is denoted as w 20 .
[0064] Further, after the obtained two seismic wave reference signals are processed to obtain seismic wavelet signals, cross-correlation calculation is performed with the third seismic detector arranged on the ground to obtain a seismic record.
[0065] Step S13: processing the target seismic record by using a compressive sensing inversion technology to obtain a target drill bit source signal.
[0066] According to the foregoing steps, the seismic detectors are comprehensively arranged in the downhole, the wellhead and the ground, and the reliable seismic wavelet signal is obtained by comparison and wavelet shaping regularization, so as to ensure the reliability of the seismic wavelet. In the embodiment of the application, the wellhead seismic wavelet signal is used for reflection coefficient calculation, and the reliable reflection coefficient is obtained according to the compressive sensing method. Further, the reliable drill bit source signal is reconstructed based on the obtained reflection coefficient and the obtained seismic wavelet, and the final seismic data is obtained. In this way, the seismic wavelet characteristics are effectively utilized, the drill bit excitation source ground signal with higher signal-to-noise ratio and resolution is obtained, and high-quality seismic data is provided for subsequent seismic-while-drilling data processing.
[0067] In the embodiment of the application, the target seismic record is processed by noise suppression based on compressive sensing to obtain a target drill bit source signal. It should be noted that, in this process, the seismic detector near the wellhead generally has a relatively good signal-to-noise ratio, so the constraint in the inversion process can be appropriately increased.
[0068] First, the reflection coefficient r is obtained. The target seismic record is processed by using a compressive sensing (CS) inversion technology to determine the reflection coefficient;
[0069] The determination formula of the reflection coefficient is ;
[0070] Wherein, represents a target equation, d is the target seismic record obtained after preprocessing, w is a cross-correlation seismic wavelet, r is a reflection coefficient to be solved, 、 is a regularization coefficient, which can be selected by experience; a cross-correlation result of the second seismic wave reference signal and the seismic wavelet signal w 20 is a norm operation, and C represents a counting function; t is time, .
[0071] Then, the reflection coefficient is multiplied by the seismic wavelet signal to obtain the target drill bit source signal, and a final drill bit excitation source surface signal is obtained.
[0072] In this way, the reflection coefficient is inverted by using the compressed sensing inversion method, and a drill bit source signal with higher reliability, resolution and signal-to-noise ratio can be obtained.
[0073] The application provides a drill bit source signal acquisition method, including: in the downhole excitation process of seismic while drilling, a first seismic detector and a second seismic detector are arranged at a drill bit and a preset range of a wellhead respectively to obtain corresponding first seismic wave reference signals and second seismic wave reference signals; a seismic wavelet signal is determined based on the first seismic wave reference signals and the second seismic wave reference signals, and a target seismic record is generated by using the seismic wavelet signal and seismic wave data collected by a third seismic detector arranged on the ground; and a target drill bit source signal is obtained by processing the target seismic record by using a compressed sensing inversion technology.
[0074] The application has the beneficial technical effects that: the seismic detectors are arranged at the wellhead and the drill bit respectively to obtain reference signals, which can be used as reference signals for correction on one hand, and can avoid the near-field effect of the drill bit on the other hand. The reliable seismic wavelet signal determined by using the reference signals obtained by the two detectors is then used to generate a more reliable target seismic record together with the seismic wave data received on the ground, and the target seismic record is further processed by using the compressed sensing inversion technology, so that the drill bit source signal with higher reliability, resolution and signal-to-noise ratio can be obtained, and high-quality seismic data is provided for subsequent seismic while drilling data processing.
[0075] Correspondingly, the application also discloses a drill bit source signal acquisition device, as shown in Figure 2 The device includes:
[0076] The reference signal acquisition module 11 is configured to arrange a first seismic detector and a second seismic detector at a drill bit and a preset range of a wellhead respectively in the downhole excitation process of seismic while drilling to obtain corresponding first seismic wave reference signals and second seismic wave reference signals.
[0077] The seismic record generation module 12 is configured to determine a seismic wavelet signal based on the first seismic wave reference signal and the second seismic wave reference signal, and generate a target seismic record by using the seismic wavelet signal and seismic wave data collected by a third seismic detector arranged on the ground surface;
[0078] The drill bit seismic source signal acquisition module 13 is configured to process the target seismic record by using a compressed sensing inversion technology to obtain a target drill bit seismic source signal.
[0079] The working processes of the above modules are specifically described in the foregoing embodiments, and thus will not be repeated here.
[0080] It can be seen that, by using the above scheme, the first seismic detector and the second seismic detector are arranged at the drill bit and within a preset range of the wellhead respectively to obtain the first seismic wave reference signal and the second seismic wave reference signal during the downhole excitation of the seismic while drilling; the seismic wavelet signal is determined based on the first seismic wave reference signal and the second seismic wave reference signal, and the target seismic record is generated by using the seismic wavelet signal and seismic wave data collected by the third seismic detector arranged on the ground surface; and the target drill bit seismic source signal is obtained by processing the target seismic record by using the compressed sensing inversion technology.
[0081] The application has the following beneficial technical effects: the seismic detectors are arranged at the wellhead and the drill bit respectively to obtain the reference signals, which can be used as reference signals for correction, and can avoid the near-field effect of the drill bit detector. The reliable seismic wavelet signal is determined by using the reference signals obtained by the two detectors, and then the target seismic record is generated by using the seismic wave data received on the ground surface. The target seismic record is processed by using the compressed sensing inversion technology, the characteristics of the seismic source wavelet are effectively used, and the drill bit seismic source signal with higher reliability, resolution and signal-to-noise ratio can be obtained, which provides high-quality seismic data for subsequent seismic while drilling data processing.
[0082] Further, the electronic device 20 is shown in FIG. 1 according to an example embodiment. Figure 3 The electronic device 20 shown in FIG. 1 is not considered as any limitation on the use range of the application.
[0083] Figure 3A structural schematic diagram of an electronic device 20 is provided in the embodiments of the present application. The electronic device 20 can specifically include at least one processor 21, at least one memory 22, a power supply 23, a communication interface 24, an input / output interface 25 and a communication bus 26. The memory 22 is configured to store a computer program, and the processor 21 is configured to load and execute the computer program to implement the related steps in the drill bit seismic source signal acquisition method disclosed in any of the foregoing embodiments.
[0084] In the embodiments, the power supply 23 is configured to provide working voltage for each hardware device on the electronic device 20; the communication interface 24 is capable of creating a data transmission channel between the electronic device 20 and external devices, and the communication protocol followed by the communication interface 24 can be any communication protocol applicable to the technical solution of the present application, which is not specifically limited here; the input / output interface 25 is configured to obtain external input data or output data to the outside, and the specific interface type can be selected according to the specific application needs, which is not specifically limited here.
[0085] In addition, the memory 22 as a carrier for resource storage can be a read-only memory, a random access memory, a magnetic disk or an optical disk, etc., and the resources stored thereon can include an operating system 221, a computer program 222 and data 223, etc., and the data 223 can include various data. The storage mode can be temporary storage or permanent storage.
[0086] The operating system 221 is configured to manage and control each hardware device on the electronic device 20 and the computer program 222, and can be Windows Server, Netware, Unix, Linux, etc. The computer program 222 can further include computer programs capable of completing other specific work in addition to the computer programs capable of completing the drill bit seismic source signal acquisition method executed by the electronic device 20 disclosed in any of the foregoing embodiments.
[0087] Further, the embodiments of the present application further disclose a computer readable storage medium, which includes a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a magnetic disk or an optical disk or any other form of storage medium known in the technical field. The computer program is executed by the processor to implement the foregoing drill bit seismic source signal acquisition method. The specific steps of the method can refer to the corresponding content disclosed in the foregoing embodiments, which will not be repeated here.
[0088] The various embodiments described in the specification are progressive in nature, and each embodiment highlights the differences from other embodiments. The same or similar parts among the various embodiments can be mutually referred to. For the apparatus disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the relevant parts can be referred to the method part.
[0089] The steps of the drill bit seismic source signal acquisition method or algorithm described in combination with the embodiments disclosed herein can be implemented directly by hardware, software modules executed by a processor, or a combination of both. The software modules can be placed in random access memory (RAM), memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium known in the art.
[0090] Finally, it should be noted that in this paper, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or equipment including the element.
[0091] The above describes in detail the drill bit seismic source signal acquisition method, device, equipment and medium provided by the present application. The principles and implementation modes of the present application are described by applying specific examples in this paper. The above embodiment description is only used to help understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed; in summary, the content of the specification should not be understood as a limitation of the present application.
Claims
1. A method of bit seismic signal acquisition, comprising: The method comprises the steps of: In the downhole excitation process of seismic while drilling, a first seismic detector and a second seismic detector are respectively arranged at the drill bit and within a preset range of the wellhead to obtain a corresponding first seismic reference signal and a second seismic reference signal; A seismic wavelet signal is determined based on the first seismic reference signal and the second seismic reference signal, and a target seismic record is generated by using the seismic wavelet signal and seismic wave data collected by a third seismic detector arranged on the ground; The target seismic record is processed by using a compressed sensing inversion technology to obtain a target drill bit source signal.
2. The drill bit seismic signal acquisition method of claim 1, wherein, The method further comprises the steps of: determining whether the signal quality of the first seismic reference signal meets a first preset condition; when the first seismic reference signal meets the first preset condition, taking the first seismic signal as a target reference signal, and then processing the target reference signal to obtain the seismic wavelet signal; when the first seismic reference signal does not meet the first preset condition, determining whether the signal quality of the second seismic reference signal meets a second preset condition; when the signal quality of the second seismic reference signal meets the second preset condition, taking the second seismic signal as a target reference signal, and then processing the target reference signal to obtain the seismic wavelet signal; when the signal quality of the second seismic reference signal does not meet the second preset condition, denoising the first seismic reference signal and the second seismic reference signal respectively, and determining the seismic wavelet signal based on the seismic wave data collected by the third seismic detector arranged on the ground.
3. The drill bit seismic signal acquisition method of claim 2, wherein, The method further comprises the steps of: based on a seismic wave attenuation theory method, inversely compensating the amplitude and frequency of the target reference signal to obtain the seismic wavelet signal.
4. The drill bit seismic signal acquisition method of claim 2, wherein, The method further comprises the steps of: denoising the first seismic reference signal and the second seismic reference signal respectively to obtain corresponding denoised signals; performing wavelet shaping regularization on the denoised signals and the seismic wave data collected by the third seismic detector arranged on the ground to determine the seismic wavelet signal.
5. The drill bit seismic signal acquisition method of claim 1, wherein, Before the step of generating the target seismic record by using the seismic wavelet signal and the seismic wave data collected by the third seismic detector arranged on the ground, the method further comprises the steps of: performing denoising preprocessing on the seismic wave data collected by the third seismic detector arranged on the ground to obtain denoised preprocessed data; correspondingly, the step of generating the target seismic record by using the seismic wavelet signal and the seismic wave data collected by the third seismic detector arranged on the ground comprises the step of: generating the target seismic record by using the seismic wavelet signal and the denoised preprocessed data.
6. The drill bit seismic signal acquisition method of claim 1, wherein, The target seismic record is generated by using the seismic wave data collected by the third seismic detector arranged on the ground and the seismic wavelet signal. The target seismic record is generated by using the seismic wave data collected by the third seismic detector arranged on the ground and the seismic wavelet signal.
7. The drill bit seismic signal acquisition method of any one of claims 1 to 6, wherein, The target seismic record is processed by using the compressed sensing inversion technology to obtain the target drill bit source signal. The target seismic record is processed by using the compressed sensing inversion technology to obtain the target drill bit source signal. The target seismic record is processed by using the compressed sensing inversion technology to obtain the target drill bit source signal. The determination formula of the reflection coefficient is ; wherein, represents a target equation, d is the target seismic record, w is a cross-correlation seismic wavelet, r is the reflection coefficient, , is a regularization coefficient, is a cross-correlation result of the second seismic wave reference signal and the seismic wavelet signal, is a norm operation, and C is a counting function; , t is time, .
8. A drill bit seismic signal acquisition apparatus, characterized by, The target seismic record is processed by using the compressed sensing inversion technology to obtain the target drill bit source signal. The reference signal acquisition module is configured to arrange the first seismic detector and the second seismic detector at the drill bit and within the preset range of the wellhead respectively during the downhole excitation of the seismic while drilling to obtain the corresponding first seismic wave reference signal and the second seismic wave reference signal. The seismic record generation module is configured to determine a seismic wavelet signal based on the first seismic wave reference signal and the second seismic wave reference signal, and generate a target seismic record by using the seismic wavelet signal and seismic wave data collected by a third seismic detector arranged on the ground. The drill bit source signal acquisition module is configured to process the target seismic record by using the compressed sensing inversion technology to obtain a target drill bit source signal.
9. An electronic device, comprising: The electronic device includes a processor and a memory; wherein the memory is used to store a computer program, the computer program is loaded and executed by the processor to realize the drill bit source signal acquisition method of any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that, The electronic device includes a processor and a memory; wherein the memory is used to store a computer program, the computer program is loaded and executed by the processor to realize the drill bit source signal acquisition method of any one of claims 1 to 7. The electronic device includes a processor and a memory; wherein the memory is used to store a computer program, the computer program is loaded and executed by the processor to realize the drill bit source signal acquisition method of any one of claims 1 to 7.