Rock discontinuity surface identification method based on seismic wave coda while drilling and related device

Abstract

The application provides a rock mass discontinuous surface identification method based on a while-drilling seismic wave tail wave and related equipment, the method comprising: acquiring a seismic wave signal generated in the process of drilling a drill rod into a rock mass to be identified, and determining a first tail wave signal and a second tail wave signal with a preset seismic source interval distance from the seismic wave signal; determining a propagation wave velocity of the while-drilling seismic tail wave in a local rock mass corresponding to the preset seismic source interval distance based on the first tail wave signal and the second tail wave signal; and identifying a discontinuous surface of the rock mass to be identified based on the propagation wave velocity. The propagation wave velocity of the while-drilling seismic tail wave in the local rock mass can be accurately determined through tail wave analysis, so that the discontinuous surface of the rock mass can be accurately identified through the propagation velocity.

Description

Technical Field

[0001] This application relates to the field of rock mass exploration technology, and in particular to a method and related device for identifying rock mass discontinuities based on seismic wakes during drilling. Background Technology

[0002] Accurately identifying rock mass structure during borehole drilling is crucial because it provides valuable information about subsurface conditions. This information can be applied to various engineering projects, such as the design and construction of tunnels, infrastructure, and mining operations. Currently, one approach involves directly analyzing the geological structure of rock cuttings or core samples extracted from the borehole. However, this method has a limited detection range per borehole rotation, making it difficult to accurately evaluate regional deep rock mass structures. Another approach involves monitoring drill pipe parameters, such as drilling speed, torque, and drill bit load, which can indirectly provide information about the characteristics and structural changes of the rock encountered during drilling. However, this method, besides having a limited detection range, easily overlooks subtle changes in the rock mass, resulting in low accuracy. In summary, current technologies for identifying rock mass structure have relatively low accuracy. Summary of the Invention

[0003] In view of this, the purpose of this application is to propose a method and related device for identifying rock discontinuities based on the wake of seismic waves during drilling.

[0004] To achieve the above objectives, this application provides a method for identifying rock mass discontinuities based on seismic wakes during drilling, comprising:

[0005] Acquire seismic wave signals generated during the drilling process of the drill pipe into the rock mass to be identified, and determine the first and second tailwave signals with a preset source spacing from the seismic wave signals;

[0006] The propagation velocity of the seismic wake wave during drilling in the local rock mass corresponding to the preset source spacing is determined based on the first wake wave information signal and the second wake wave signal.

[0007] The discontinuities of the rock mass to be identified are determined based on the propagation wave velocity.

[0008] The seismic wave signal is obtained through a seismic detector, which is installed on the outer surface of the rock mass to be identified.

[0009] Based on the same inventive concept, an exemplary embodiment of this application also provides a rock mass discontinuity identification device based on the wake wave of a seismic wave during drilling, comprising:

[0010] The acquisition module acquires the seismic wave signals generated during the drilling process of the drill pipe into the rock mass to be identified, and determines the first and second tailwave signals with a preset source spacing from the seismic wave signals.

[0011] The determination module determines the propagation velocity of the seismic wake wave in the local rock mass corresponding to the preset source spacing based on the first wake wave information signal and the second wake wave signal.

[0012] The identification module identifies the discontinuities of the rock mass to be identified based on the propagation wave velocity;

[0013] The seismic wave signal is obtained through a seismic detector, which is installed on the outer surface of the rock mass to be identified.

[0014] Accordingly, this application also provides a non-transitory computer-readable storage medium storing computer instructions for causing a computer to execute the rock mass discontinuity identification method based on seismic wakes during drilling as described above.

[0015] Based on the same inventive concept, an exemplary embodiment of this application also provides a non-transitory computer-readable storage medium storing computer instructions for causing a computer to execute the interface transition animation generation method described above.

[0016] As can be seen from the above, the rock discontinuity identification method and related equipment based on seismic wakes during drilling provided in this application acquire seismic wave signals generated during the drilling process of the drill pipe into the rock mass to be identified, and determine a first wake signal and a second wake signal at a preset source spacing from the seismic wave signals; determine the propagation velocity of the seismic wake in the local rock mass corresponding to the preset source spacing based on the first wake signal and the second wake signal; and identify the discontinuity of the rock mass to be identified based on the propagation velocity. The seismic wave signals are obtained through a seismic detector, which is installed on the outer surface of the rock mass to be identified. Through wake analysis, the propagation velocity of the seismic wake in the local rock mass can be accurately determined, thereby accurately identifying the discontinuity of the rock mass. Furthermore, since the wake is generated by multiple scattering and reflection of the source in the medium, identifying the internal structure of the rock mass through wake signal analysis is more sensitive to minute changes in the rock medium, thus further improving the accuracy of rock mass structure identification. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a flowchart illustrating a method for identifying rock discontinuities based on seismic wakes during drilling, according to an embodiment of this application.

[0019] Figure 2 This is a schematic diagram illustrating an application scenario of a rock discontinuity identification method based on seismic wakes during drilling, according to an embodiment of this application.

[0020] Figure 3 This is a schematic diagram of a seismic wave signal according to an embodiment of this application;

[0021] Figure 4 This is a schematic diagram of the full waveform of seismic wave signals at different drilling depths according to an embodiment of this application;

[0022] Figure 5a This is a schematic diagram illustrating the comparison of two adjacent seismic wave signals in the first embodiment of this application;

[0023] Figure 5b This is a schematic diagram illustrating the comparison of two adjacent seismic wave signals in the third embodiment of this application.

[0024] Figure 5c This is a schematic diagram illustrating the comparison of two adjacent seismic wave signals in the third embodiment of this application.

[0025] Figure 6 This is a schematic diagram comparing the actual propagation velocity and the identified propagation velocity of a seismic wake wave during drilling, according to an embodiment of this application.

[0026] Figure 7 This is a schematic diagram of the longitudinal wave velocity distribution of rock mass along the drilling direction according to an embodiment of this application;

[0027] Figure 8 This is a schematic diagram of the structure of a rock discontinuity identification device based on the wake of a seismic wave during drilling, according to an embodiment of this application.

[0028] Figure 9 This is a schematic diagram of the structure of a specific electronic device according to an embodiment of this application. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0030] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0031] It is understood that before using the technical solutions of the various embodiments in this application, users will be informed of the type, scope of use, and usage scenarios of the personal information involved in an appropriate manner, and user authorization will be obtained.

[0032] For example, upon receiving a user's active request, a prompt message is sent to the user to explicitly inform them that the requested operation will require the acquisition and use of the user's personal information. This allows the user to independently choose, based on the prompt message, whether to provide personal information to the software or hardware such as electronic devices, applications, servers, or storage media performing the operations described in this application.

[0033] As an optional but not limited implementation, in response to a user's active request, sending a prompt message to the user can be done via a pop-up window, where the prompt message can be presented in text format. Furthermore, the pop-up window can also include a selection control allowing the user to choose "agree" or "disagree" to provide personal information to the electronic device.

[0034] It is understood that the above notification and user authorization process is merely illustrative and does not limit the implementation of this application. Other methods that comply with relevant laws and regulations may also be applied to the implementation of this application.

[0035] It should be understood that, although Figure 1 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figure 1At least some of the steps in the process may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.

[0036] As described in the background section, current related technologies employ two methods. One method involves directly analyzing the geological structure of rock cuttings or core samples extracted from the borehole. However, this method has a limited detection range per borehole rotation, making it difficult to accurately evaluate regional deep rock mass structures. Another method involves monitoring drill pipe parameters, such as drilling speed, torque, and drill bit load, to indirectly provide information about the rock characteristics and structural changes encountered during drilling. However, this method, besides having a limited detection range, does not always directly identify the rock mass structure encountered during drilling. Some rock formations may exhibit similar characteristics or subtle changes, and monitoring drill pipe parameters can easily overlook these subtle changes, resulting in low detection accuracy. In summary, current related technologies offer relatively low accuracy in identifying rock mass structures.

[0037] To address the aforementioned issues, this application proposes a method for identifying rock discontinuities based on seismic wakes during drilling. By performing wake interference analysis on the seismic waves generated during drilling into the rock mass, the propagation velocity of the wakes in the rock per unit depth (preset source spacing) is estimated. Based on the changes in the estimated velocity, discontinuities in the rock mass can be identified with high precision.

[0038] refer to Figure 1 This is a flowchart illustrating a method for identifying rock discontinuities based on seismic wakes during drilling, according to an embodiment of this application. The method includes the following steps:

[0039] S101, acquire the seismic wave signal generated during the drilling process of the drill pipe into the rock mass to be identified, and determine the first tail wave signal and the second tail wave signal from the seismic wave signal at a preset source spacing.

[0040] In practice, during the drilling process through the rock mass, the drill pipe generates seismic wave signals within the rock. Generally, the endpoint of the drill pipe within the rock mass, i.e., the location of the drilling head, is determined as the source of the seismic signal. (Reference) Figure 2In this diagram, 001 represents the rock mass being drilled, and 002 represents a seismic detector mounted on the outer surface of the rock mass 001. This seismic detector is primarily used to collect seismic wave signals. Optionally, the seismic detector 002 can be positioned on the outer surface of the rock mass near the drill pipe, or on the working face of the rock mass. Considering that the vibration generated by the drilling impact source in this embodiment is approximately 800Hz, a high-frequency broadband seismic detector can be selected to improve accuracy. 003 represents the drill pipe. Optionally, the total length of the drill pipe can generally be achieved by splicing multiple drill pipes to ensure the drilling depth. The head of the drill pipe, 005, represents the position of the seismic wave source. Optionally, as the drill pipe penetrates deeper, the position of the source 005 changes accordingly. 004 represents the rotating mechanism, which is mainly used to provide power to the drill pipe. Optionally, in some embodiments, at the specific implementation site of this application embodiment, other equipment such as a laser rangefinder and a drilling test short circuit are also included. The laser rangefinder is mainly used to detect the distance the drill pipe penetrates into the rock mass, and the drilling test short circuit is mainly used to detect some drilling parameters of the drill pipe during the hole rotation process to assist in some test judgments. In some embodiments, the laser rangefinder will monitor the drilling depth of the drill pipe in real time, and in conjunction with the attitude sensor in the drilling test short circuit, display the current drilling position on the host in real time, that is, the real-time position of the percussion drill vibration source.

[0041] In some embodiments, the seismic wave signals generated during the drilling process of the drill pipe into the rock mass to be identified, acquired by the seismic detector, are continuous seismic wave signals, and these continuous seismic wave signals include multiple seismic wave signal segments. Generally, each vibration of the source corresponds to a seismic wave signal segment, and each seismic wave signal segment can be divided into a direct wave (first arrival wave), a reflected wave, and a subsequent wake wave based on the time of arrival at the seismic detector. For example, when the vibration generated by the drilling impact source is approximately 800 Hz, the length of each seismic wave signal segment is 80 ms, and the waveform after 40 ms can be considered as the wake wave portion of the signal. To better analyze the wake wave, in some embodiments, (60 ms, 80 ms) can be selected as a given time window (t1, t2) for wake wave analysis. (Reference) Figure 3 This is a schematic diagram of a seismic wave signal according to an embodiment of this application, wherein, Figure 3 The first signal wave from top to bottom is a seismic wave signal propagating along the drill pipe. Optionally, this signal can be obtained through a short-circuit test during drilling, installed at the lower end of the drill pipe (where it connects to the power head). The second and third signals are both seismic wave signals propagating in the surrounding rock of the tunnel (the rock mass to be identified). It can be seen that... Figure 3 Each signal in the system consists of two consecutive signal segments, and each signal segment can be divided into a direct wave, a reflected wave, and a wake wave according to its arrival time.

[0042] In some embodiments, to accurately determine the propagation velocity of the wake signal in a local rock mass, it is necessary to acquire two wake signals spaced apart by a preset source spacing, namely, a first wake signal and a second wake signal. It should be noted that as the drill rod continuously penetrates deeper into the rock mass, the position of the source relative to the seismic detector constantly changes. The seismic wave signals acquired at different times correspond to the distance the drill rod has penetrated during that time interval. For example, if a seismic wave signal is acquired at a certain moment, and then another seismic wave signal is acquired when the drill rod has penetrated 0.2 meters, then the source spacing between these two seismic wave signals is 0.2 meters. The first and second wake signals of this application correspond to the wake signals of two vibration signals spaced apart by a preset source spacing. That is, to acquire the first and second source signals spaced apart by a preset source spacing, the first and second source signals are acquired first, and then the first and second wake signals are acquired from the first and second source signals respectively. Optionally, the preset source spacing is the preset distance between the two wake signal sources. The specific value can be set as needed and is not limited thereto. Considering that in this embodiment, the vibration generated by the drilling impact source is about 800Hz, in order to ensure the recognition accuracy, the preset source spacing can be set to 0.1 meters.

[0043] refer to Figure 4 This is a schematic diagram of the full waveform of seismic wave signals at different drilling depths according to an embodiment of this application, wherein... Figure 4 The horizontal axis represents the sequence number of the seismic wave signal, i.e. Figure 4 It includes the full waveform signals of 5 seismic wave signals, and each signal corresponds to a different depth into which the drill pipe is rotated, that is, the distance between the source of the 5 seismic wave signals and the seismic detector is different. Figure 4 The vertical axis in the graph represents the arrival time of the seismic wave signal. Figure 4 Each signal in the middle is approximately 80ms long.

[0044] S102, based on the first wake wave information signal and the second wake wave signal, determine the propagation velocity of the seismic wake wave in the local rock mass corresponding to the preset source spacing.

[0045] In practice, after obtaining the first wake wave information signal and the second wake wave signal, the propagation velocity of the seismic wake wave in the local rock mass corresponding to the preset source spacing can be determined based on the first wake wave information signal and the second wake wave signal.

[0046] refer to Figures 5a to 5c This is a comparison chart of two seismic wave signals spaced at a preset distance from the seismic source. The dashed line represents the seismic wave before the source moves, and the solid line represents the seismic wave after the source moves. Figure 5aIt can be seen that the two signals are very similar overall, but a comparison of the specific first arrival and wake waves reveals a phase difference between the two signals. However, in the initial wave, the initial arrival times of the two signals are the same, i.e. Figure 5b The first wave inflection points from left to right completely overlap, making it impossible to calculate the velocity of the seismic wave in the rock mass using the difference in arrival times of the two signals. However, in Figure 5c In the corresponding wake waves, there is a phase difference between the wake waves of two signals. This phase difference is related to the variance of the wake wave signal. The distance between the source and the seismic detector (receiver) is related to the variance (inconsistent phase disturbance). Since the receiver position remains unchanged in the seismic wave monitoring while drilling, the distance between the movement of adjacent source channels (preset source spacing) is also related to the variance. Therefore, the propagation speed of the wake wave in the rock mass can be determined by wake wave analysis.

[0047] To accurately determine the propagation velocity of the seismic wake wave in the rock mass corresponding to the preset source spacing during drilling, in some embodiments, the propagation velocity of the seismic wake wave in the rock mass corresponding to the preset source spacing during drilling is determined based on the first wake wave information signal and the second wake wave signal. Specifically, this includes: determining the maximum correlation coefficient between the first wake wave information signal and the second wake wave signal, wherein the maximum correlation coefficient is related to the variance of the seismic wake wave during drilling; then determining the variance of the seismic wake wave during drilling based on the maximum correlation coefficient; and determining the propagation velocity of the wake wave information in the rock mass corresponding to the preset source spacing during drilling based on the variance and the preset source spacing.

[0048] In some embodiments, determining the maximum correlation coefficient between the first wake signal and the second wake signal specifically includes:

[0049] The correlation coefficient between the first wake signal and the second wake signal is determined by the correlation coefficient calculation formula.

[0050] The maximum correlation coefficient is determined from the correlation coefficient between the first wake signal and the second wake signal;

[0051] The formula for calculating the correlation coefficient is as follows:

[0052]

[0053] Where uunp(t) represents the first wake signal, uper(t[1+∈]) represents the second wake signal, R represents the correlation coefficient between the first wake signal and the second wake signal, and (t1,t2) represents the time window corresponding to the first wake signal and the second wake signal.

[0054] In some embodiments, the variance of the seismic wake during drilling is determined by the following formula:

[0055]

[0056] Wherein, the R max This represents the maximum correlation coefficient. This represents the dominant mean square frequency in the tail wave waveform. This represents the variance of the seismic wake wave during drilling.

[0057] In some embodiments, the propagation velocity of the wake information in the rock mass corresponding to the preset source spacing is determined by the following formula:

[0058]

[0059] in, The variance of the seismic wake during drilling is represented by α, the P-wave velocity of the seismic wake during drilling is represented by r, and the seismic detector is a P-wave seismic detector that only receives P-waves.

[0060] It should be noted that when the seismic detector is a P-wave seismic detector that only receives P-waves, only the P-wave velocity exists in the coma signal. Therefore, the relationship between variance and P-wave velocity can be determined relative to that in a two-dimensional acoustic medium.

[0061] In some implementation examples, the relationship between the variance of the seismic wake during drilling and the preset source spacing is as follows:

[0062]

[0063] in, The variance of the seismic wake during drilling is represented by α, the P-wave velocity of the seismic wake during drilling is represented by β, the S-wave velocity of the seismic wake during drilling is represented by r, and the seismic detector is a seismic detector that simultaneously receives P-waves and S-waves.

[0064] Considering that when identifying discontinuities in rock mass by measuring the propagation velocity of seismic wakes during drilling, it is only necessary to determine either the P-wave velocity or the S-wave velocity to accurately identify the discontinuities. Furthermore, the P-wave velocity and S-wave velocity generally have a multiple relationship. Therefore, to improve computational efficiency, in some embodiments, the propagation velocity of the wake information in the rock mass corresponding to the preset source spacing can be determined using the following formula:

[0065]

[0066] in, Let α represent the variance of the seismic wake during drilling, α represent the P-wave velocity of the seismic wake during drilling, r represent the preset source spacing, and the seismic detector is a seismic detector that simultaneously receives P-waves and S-waves, wherein the P-wave velocity is twice the S-wave velocity. It should be noted that in some embodiments, other multiple relationships between P-wave velocities and S-wave velocities can be assumed to simplify the relationship between the variance of the seismic wake during drilling and the preset source spacing, thereby facilitating the determination of the propagation velocity of the wake information in the rock mass corresponding to the preset source spacing.

[0067] refer to Figure 6 This is a schematic diagram comparing the actual propagation velocity and the identified propagation velocity of a seismic wake wave during drilling, according to an embodiment of this application. Figure 6 The horizontal axis represents the propagation speed of the wake wave, in seconds per second (m / s), and the vertical axis represents the distance from the source of each wake wave, with 300 corresponding to a distance of 15 meters. Figure 6 The asterisk (*) in the figure represents the identified propagation velocity of the seismic wake wave during drilling, and the curve represents the actual propagation velocity of the seismic wake wave during drilling. It can be seen that the two are almost completely consistent, which further illustrates the accuracy of determining the propagation velocity of the seismic wake wave during drilling in the rock mass corresponding to the preset source spacing in the above embodiments of this application.

[0068] S103, Identify the discontinuities of the rock mass to be identified based on the propagation wave velocity.

[0069] In practice, after obtaining the propagation velocity of the seismic wake wave in the local rock mass corresponding to the preset source spacing, the discontinuity of the rock mass to be identified can be identified based on the propagation velocity. Optionally, when the propagation velocity of the seismic wake wave in a certain local rock mass is low, it indicates that there is a discontinuity in that local rock mass.

[0070] It should be noted that the term "drilling-while-operating seismic wake wave" refers to the wake wave signal in the seismic wave signal generated during the drilling process of the drill pipe into the rock mass to be identified. Specifically, the first and second wake wave signals in the above embodiments both belong to the drilling-while-operating seismic wake wave. The propagation wave velocity of the drilling-while-operating seismic wake wave in the local rock mass corresponding to the preset source spacing generally refers to the average propagation velocity of the drilling-while-operating seismic wake wave in the local rock mass.

[0071] In some embodiments, identifying the discontinuities of the rock mass to be identified based on the propagation wave velocity specifically includes:

[0072] In response to the propagation wave velocity being less than the preset propagation velocity, it is determined that there is a rock mass discontinuity in the local rock mass corresponding to the preset source spacing.

[0073] In specific implementation, when the propagation wave velocity is determined to be less than the preset propagation velocity, it is determined that there is a rock mass discontinuity in the local rock mass corresponding to the preset source spacing. Optionally, in some embodiments, multiple propagation wave velocities can be calculated first, then sorted in descending order, and the propagation wave velocity in the bottom 50% is determined as the target propagation wave velocity, and the local rock mass corresponding to the target propagation wave velocity is determined as the local rock mass with a rock mass discontinuity.

[0074] refer to Figure 7 This is a schematic diagram of the longitudinal wave velocity distribution of rock mass along the borehole direction. Figure 7 The colors in the diagram represent the longitudinal wave velocity of the rock mass, measured in meters per second. Discontinuities in the rock mass appear as low-velocity bodies. Figure 7 The dark black parts in the image mostly correspond to discontinuous surfaces.

[0075] The method for identifying rock discontinuities based on seismic wakes during drilling provided in this application acquires seismic wave signals generated during drilling into the rock mass to be identified, and determines a first wake signal and a second wake signal at a preset source spacing from the seismic wave signals; determines the propagation velocity of the seismic wake in the local rock mass corresponding to the preset source spacing based on the first wake signal and the second wake signal; and identifies the discontinuities of the rock mass to be identified based on the propagation velocity. The seismic wave signals are obtained through a seismic detector, which is installed on the outer surface of the rock mass to be identified. Through wake analysis, the propagation velocity of the seismic wake in the local rock mass can be accurately determined, thus allowing for precise identification of rock discontinuities. Furthermore, since the wake is generated by multiple scattering and reflection of the source in the medium, analyzing the wake signal to identify the internal structure of the rock mass is more sensitive to minute changes in the rock medium, thereby further improving the accuracy of rock mass structure identification.

[0076] Furthermore, the method described in this application, compared to traditional seismic wave testing methods while drilling, allows for the identification of rock discontinuities using a single seismic detector at the working face. This method is more convenient and practical in practice, and the reduced number of operations and equipment required at the working face ensures testing safety. Since the wake wave is the result of multiple scatterings of seismic waves within the surrounding rock medium, it involves more repeated sampling of the medium, making it more sensitive to minute changes in medium properties. It can identify minute changes in the medium that direct waves cannot detect, offering a significant advantage in identifying minute rock discontinuities. Compared to traditional tomography and velocity inversion methods, wake wave analysis directly measures the true velocity, rather than the relative apparent velocity derived from tomography. This is more advantageous for identifying lithology and the filling conditions of rock discontinuities.

[0077] It should be noted that the method in this embodiment can be executed by a single device, such as a computer or server. The method can also be applied in a distributed scenario, where multiple devices cooperate to complete the task. In such a distributed scenario, one of these devices may execute only one or more steps of the method in this embodiment, and the multiple devices will interact with each other to complete the method described.

[0078] It should be noted that the above description describes some embodiments of this application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in a different order than that shown in the above embodiments and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0079] Based on the same inventive concept, and corresponding to any of the above embodiments, this application also provides a rock discontinuity identification device based on the wake wave of a seismic wave during drilling.

[0080] refer to Figure 8 The rock discontinuity identification device based on seismic wake during drilling includes:

[0081] The acquisition module 201 acquires the seismic wave signals generated during the drilling process of the drill pipe into the rock mass to be identified, and determines the first and second tail wave signals with a preset source spacing from the seismic wave signals.

[0082] The determination module 202 determines the propagation velocity of the seismic wake wave in the local rock mass corresponding to the preset source spacing based on the first wake wave information signal and the second wake wave signal.

[0083] The identification module 203 identifies the discontinuities of the rock mass to be identified based on the propagation wave velocity;

[0084] The seismic wave signal is obtained through a seismic detector, which is installed on the outer surface of the rock mass to be identified.

[0085] In some embodiments, the determining module includes:

[0086] The correlation coefficient module is used to determine the maximum correlation coefficient between the first wake signal and the second wake signal;

[0087] The variance module is used to determine the variance of the seismic wake wave during drilling based on the maximum correlation coefficient.

[0088] The wave velocity module is used to determine the propagation wave velocity of the tailwave information in the rock mass corresponding to the preset source spacing based on the variance and the preset source spacing.

[0089] In some embodiments, the correlation coefficient module is specifically used for:

[0090] The correlation coefficient between the first wake signal and the second wake signal is determined by the correlation coefficient calculation formula.

[0091] The maximum correlation coefficient is determined from the correlation coefficient between the first wake signal and the second wake signal;

[0092] The formula for calculating the correlation coefficient is as follows:

[0093]

[0094] Where uunp(t) represents the first wake signal, uper(t[1+∈]) represents the second wake signal, R represents the correlation coefficient between the first wake signal and the second wake signal, and (t1,t2) represents the time window corresponding to the first wake signal and the second wake signal.

[0095] In some embodiments, the variance module is specifically used to determine the variance of the seismic wake during drilling using the following formula:

[0096]

[0097] Wherein, the R max This represents the maximum correlation coefficient. This represents the dominant mean square frequency in the tail wave waveform. This represents the variance of the seismic wake wave during drilling.

[0098] In some embodiments, the velocity module is specifically used to determine the propagation velocity of the wake information in the rock mass corresponding to the preset source spacing using the following formula:

[0099]

[0100] in, The variance of the seismic wake during drilling is represented by α, the P-wave velocity of the seismic wake during drilling is represented by r, and the seismic detector is a P-wave seismic detector that only receives P-waves.

[0101] In some embodiments, the velocity module is further configured to determine the propagation velocity of the wake information in the rock mass corresponding to the preset source spacing using the following formula:

[0102]

[0103] in, The variance of the seismic wake during drilling is represented by α, the P-wave velocity of the seismic wake during drilling is represented by r, the preset source spacing is represented by r, the seismic detector is a seismic detector that simultaneously receives P-waves and S-waves, and the P-wave velocity is twice the S-wave velocity.

[0104] In some embodiments, the identification module is specifically used for:

[0105] In response to the propagation wave velocity being less than the preset propagation velocity, it is determined that there is a rock mass discontinuity in the local rock mass corresponding to the preset source spacing.

[0106] For ease of description, the above devices are described in terms of function, divided into various modules. Of course, in implementing this application, the functions of each module can be implemented in one or more software and / or hardware.

[0107] The apparatus of the above embodiments is used to implement the rock discontinuity identification method based on seismic wake wave during drilling in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0108] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the rock discontinuity identification method based on seismic wakes during drilling as described in any of the above embodiments.

[0109] Figure 9 This embodiment illustrates a more specific hardware structure of an electronic device, which may include a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040, and a bus 1050. The processor 1010, memory 1020, input / output interface 1030, and communication interface 1040 are interconnected internally via the bus 1050.

[0110] The processor 1010 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0111] The memory 1020 can be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 1020 can store the operating system and other applications. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program code is stored in the memory 1020 and is called and executed by the processor 1010.

[0112] The input / output interface 1030 is used to connect input / output modules to realize information input and output. Input / output modules can be configured as components within the device (not shown in the figure) or externally connected to the device to provide corresponding functions. Input devices may include keyboards, mice, touchscreens, microphones, various sensors, etc., while output devices may include displays, speakers, vibrators, indicator lights, etc.

[0113] The communication interface 1040 is used to connect a communication module (not shown in the figure) to enable communication between this device and other devices. The communication module can communicate via wired means (such as USB, Ethernet cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.).

[0114] Bus 1050 includes a pathway for transmitting information between various components of the device, such as processor 1010, memory 1020, input / output interface 1030, and communication interface 1040.

[0115] It should be noted that although the above-described device only shows the processor 1010, memory 1020, input / output interface 1030, communication interface 1040, and bus 1050, in specific implementations, the device may also include other components necessary for normal operation. Furthermore, those skilled in the art will understand that the above-described device may only include the components necessary for implementing the embodiments of this specification, and not necessarily all the components shown in the figures.

[0116] The electronic devices described above are used to implement the rock discontinuity identification method based on seismic wakes during drilling in any of the foregoing embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0117] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this application also provides a non-transitory computer-readable storage medium storing computer instructions for causing the computer to execute the rock mass discontinuity identification method based on seismic wakes during drilling as described in any of the above embodiments.

[0118] The computer-readable medium of this embodiment includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0119] The computer instructions stored in the storage medium of the above embodiments are used to cause the computer to execute the rock discontinuity identification method based on seismic wakes during drilling as described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0120] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this application also provides a computer program product, which includes a computer program. In some embodiments, the computer program is executed by one or more processors to cause the processors to perform the interface transition animation generation method described in the above embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0121] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application (including the claims) is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in the details for the sake of brevity.

[0122] Additionally, to simplify the description and discussion, and to avoid obscuring the embodiments of this application, the well-known power / ground connections to integrated circuit (IC) chips and other components may or may not be shown in the provided drawings. Furthermore, the apparatus may be shown in block diagram form to avoid obscuring the embodiments of this application, and this also takes into account the fact that the details of the implementation of these block diagram apparatuses are highly dependent on the platform on which the embodiments of this application will be implemented (i.e., these details should be fully understood by those skilled in the art). While specific details (e.g., circuits) have been set forth to describe exemplary embodiments of this application, it will be apparent to those skilled in the art that the embodiments of this application can be implemented without these specific details or with variations thereof. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0123] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications, and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may be used with the embodiments discussed.

[0124] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A rock mass discontinuity identification method based on seismic wave tail waves while drilling, characterized in that, include: Acquire seismic wave signals generated during the drilling process of the drill pipe into the rock mass to be identified, and determine the first and second tailwave signals with a preset source spacing from the seismic wave signals; The propagation velocity of the seismic wake wave during drilling in the local rock mass corresponding to the preset source spacing is determined based on the first wake wave signal and the second wake wave signal. The discontinuities of the rock mass to be identified are determined based on the propagation wave velocity. The seismic wave signal is obtained through a seismic detector, which is installed on the outer surface of the rock mass to be identified.

2. The method of claim 1, wherein, Determining the propagation velocity of the seismic wake-up wave in the rock mass corresponding to the preset source spacing based on the first wake-up signal and the second wake-up signal specifically includes: Determine the maximum correlation coefficient between the first and second wake signals; The variance of the seismic wake during drilling is determined based on the maximum correlation coefficient. The propagation velocity of the tailwave signal in the rock mass corresponding to the preset source spacing is determined based on the variance and the preset source spacing.

3. The method of claim 2, wherein, Determining the maximum correlation coefficient between the first wake signal and the second wake signal specifically includes: The correlation coefficient between the first and second tailwave signals is determined using the correlation coefficient calculation formula. The maximum correlation coefficient is determined from the correlation coefficients of the first and second wake signals; The formula for calculating the correlation coefficient is as follows: Where uunp(t) represents the first wake signal, uper(t[1+∈]) represents the second wake signal, R represents the correlation coefficient between the first wake signal and the second wake signal, and (t1,t2) represents the time window corresponding to the first wake signal and the second wake signal.

4. The method according to claim 2, characterized in that, The variance of the seismic wake during drilling is determined using the following formula: Wherein, the R max This represents the maximum correlation coefficient. This represents the mean square frequency in the wake waveform. This represents the variance of the seismic wake wave during drilling.

5. The method according to claim 2, characterized in that, The propagation velocity of the wake signal in the rock mass corresponding to the preset source spacing is determined by the following formula: in, The variance of the seismic wake during drilling is represented by α, the P-wave velocity of the seismic wake during drilling is represented by r, and the seismic detector is a P-wave seismic detector that only receives P-waves.

6. The method according to claim 2, characterized in that, The propagation velocity of the wake signal in the rock mass corresponding to the preset source spacing is determined by the following formula: in, The variance of the seismic wake during drilling is represented by α, the P-wave velocity of the seismic wake during drilling is represented by r, the preset source spacing is represented by r, the seismic detector is a seismic detector that simultaneously receives P-waves and S-waves, and the P-wave velocity is twice the S-wave velocity.

7. The method according to claim 1, characterized in that, Identifying discontinuities in the rock mass to be identified based on the propagation wave velocity specifically includes: In response to the propagation wave velocity being less than the preset propagation velocity, it is determined that there is a rock mass discontinuity in the local rock mass corresponding to the preset source spacing.

8. A rock mass discontinuity identification device based on seismic wakes during drilling, characterized in that, include: The acquisition module acquires the seismic wave signals generated during the drilling process of the drill pipe into the rock mass to be identified, and determines the first and second tailwave signals with a preset source spacing from the seismic wave signals. The determination module determines the propagation velocity of the seismic wake wave in the local rock mass corresponding to the preset source spacing based on the first wake wave signal and the second wake wave signal. The identification module identifies the discontinuities of the rock mass to be identified based on the propagation wave velocity; The seismic wave signal is obtained through a seismic detector, which is installed on the outer surface of the rock mass to be identified.

9. A non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the method according to any one of claims 1 to 7.

10. An electronic device, characterized in that, The method includes a memory, a processor, and a computer program stored in the memory and executable by the processor, wherein the processor, when executing the program, implements the method as described in any one of claims 1 to 7.

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