Dipole acoustic logging instrument transmitting crystal detection device and health state evaluation system

Abstract

The present application relates to the field of oil well logging, and discloses a dipole acoustic logging instrument transmitting crystal detection device and health state evaluation system. The device comprises: a probe support, the support seat is placed on the ground beside the dipole acoustic logging instrument transmitting crystal; a plurality of microphone probes, which are arranged at the end of the movable arm of the probe support and fixed by a probe clamp, the height of the probe and the distance from the transmitting crystal are adjustable, and the microphone probes are used for converting the acoustic signal excited by the dipole acoustic logging instrument transmitting crystal into an electric signal; a test box connected with the plurality of microphone probes, which is used for preprocessing the signal collected by the probe, transmitting the collected data to the upper computer through a communication module and storing the data as an audio data file. The audio data file collected is analyzed and processed by the upper computer and graphical analysis processing software, so that qualitative and quantitative detection of the quality and matching of the dipole acoustic transmitting crystal can be realized without disassembling the instrument. The maintenance cycle is greatly shortened, the maintenance cost is reduced, and the maintenance efficiency is improved.

Description

Technical Field

[0001] This disclosure relates to the field of oil well logging, and in particular to a dipole acoustic logging tool emitting crystal detection device and health status assessment system. Background Technology

[0002] In the field of oil well logging, dipole acoustic logging can perform monopole, dipole, and dipole shear wave logging in both fast and slow formations. Furthermore, the logging data from dipole acoustic logging can directly extract P-waves, S-waves, and Stoneley waves from fast and slow formations, enabling the evaluation of oil and gas reservoirs from various aspects, including: calculation of rock mechanical parameters, lithology identification, gas layer identification, and fracture identification based on the magnitude of formation anisotropy. Its unique measurement methods and enhancement modes are unmatched by conventional acoustic instruments.

[0003] Currently, with the widespread application of dipole acoustic logging, higher requirements have been placed on the maintenance and repair of dipole acoustic logging instruments. Due to the relatively complex structure of dipole acoustic logging instruments, especially the maintenance of the transmitting and receiving acoustic systems, inspection and repair often have to be carried out only after disassembly.

[0004] The existing maintenance methods have drawbacks such as high operational difficulty, high maintenance costs, and long maintenance cycles. Summary of the Invention

[0005] The purpose of this invention is to at least address the deficiencies mentioned above, and to disclose a new method for testing the transmitting crystal of a dipole acoustic logging instrument without disassembly. This method enables qualitative and quantitative testing of the quality and matching of the dipole acoustic transmitting crystal without disassembling the instrument, which can significantly shorten the maintenance cycle, reduce maintenance costs, and greatly improve maintenance efficiency.

[0006] To address the aforementioned technical problems, at least one embodiment of this application provides a dipole acoustic logging tool transmitting crystal detection device, the device comprising: a probe bracket, multiple microphone probes, a test box, and a communication module;

[0007] The probe support is placed on the ground next to the transmitting crystal of the dipole acoustic logging tool via a support base.

[0008] The plurality of microphone probes are mounted on the movable arm end of the probe bracket and fixed by the probe clamp. The height of the plurality of microphone probes and the distance between them and the transmitting crystal of the dipole acoustic logging tool are adjustable. The plurality of microphone probes are used to convert the acoustic wave signal excited by the transmitting crystal of the dipole acoustic logging tool into an electrical signal.

[0009] The test box is connected to the plurality of microphone probes and is used to preprocess the signals collected by the plurality of microphone probes, and send the preprocessed data to an external communication object through the communication module so that the external communication object can collect and store the data.

[0010] The communication module is located inside the test box and is used for communication with the external communication object.

[0011] This application also provides a health status assessment system for the transmitting crystal of a dipole acoustic logging tool, including:

[0012] The host computer and the acquisition software running on the host computer communicate with the test box via wired or wireless means. The host computer is used to send acquisition control commands to the test box and receive data uploaded by the test box and store it as audio data.

[0013] Based on the graphical analysis and processing software developed according to the preset evaluation strategy, the host computer runs the graphical analysis and processing software to perform first wave polarity, time domain curve correlation, frequency domain curve correlation, and peak frequency analysis on the audio data, thereby evaluating the operating status of the transmitting crystal of the dipole acoustic logging tool, and determining the health status of the transmitting crystal based on the operating status of the transmitting crystal.

[0014] At least one embodiment of this application also provides a method for assessing the health status of the transmitting crystal in a dipole acoustic logging tool, based on the system implementation described above, the method comprising:

[0015] The acoustic system of the dipole acoustic logging tool to be evaluated is subjected to a vacuum circulation and silicone oil filling operation.

[0016] Perform the installation and fixing of multiple microphone probes, placing the probe bracket on the ground next to the transmitting crystal of the dipole acoustic logging tool; set the multiple microphone probes at the movable arm end of the probe bracket and fix them with probe clamps; based on the preset microphone probe arrangement strategy, adjust the probe height and distance from the transmitting crystal so that the front of the microphone probe faces the center of the transmitting crystal window of the dipole acoustic instrument, and the distance between each microphone probe and the corresponding transmitting crystal is consistent;

[0017] Activate the test box of the dipole acoustic logging tool's transmitting crystal detection device;

[0018] Start the host computer and acquisition software to collect and store the data uploaded by the test box. Record one audio data for each dipole emitting crystal. The audio data is obtained based on the sound waves excited by each emitting crystal of the acoustic logging tool to be evaluated in the current working mode.

[0019] The host computer runs graphical analysis and processing software to analyze the audio data, thereby evaluating the operating status of the transmitting crystal of the acoustic logging tool, and determining the health status of the transmitting crystal based on its operating status. The graphical analysis and processing software is developed according to a preset evaluation strategy.

[0020] At least one embodiment of this application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the method described above.

[0021] The dipole acoustic logging tool transmitting crystal detection device, health status assessment system and method provided in this application embodiment can be regarded as a new method for detecting the transmitting crystal of the dipole acoustic logging tool without disassembly, compared with the prior art. It can realize qualitative and quantitative detection of the quality and matching of the dipole acoustic transmitting crystal without disassembling the instrument, which can significantly shorten the maintenance cycle, reduce maintenance costs and improve maintenance efficiency.

[0022] In some optional embodiments, each of the microphone probes is used to collect acoustic wave signals from different transmitting crystals, and there is a one-to-one correspondence between the microphone probes and the transmitting crystals;

[0023] Each microphone probe is oriented toward the corresponding transmitting crystal, and the distance between each microphone probe and the corresponding transmitting crystal is consistent.

[0024] The microphone probes must face the center of the transmitting crystal window of the dipole acoustic logging tool, and the distance between all microphone probes and the transmitting crystal window must be kept consistent in each test to obtain the acoustic signals excited by each transmitting crystal in the dipole acoustic logging tool under the same operating conditions.

[0025] In some optional embodiments, the test box includes:

[0026] The preamplifier module is used to amplify the electrical signal collected by the microphone probe to obtain the amplified electrical signal;

[0027] The filtering module is used to filter the amplified electrical signal to remove noise from the signal and obtain a noise-removed electrical signal.

[0028] An analog-to-digital converter module is used to convert the noise-removed analog electrical signal into a digital signal;

[0029] The data buffer module is used to store the digital signal after analog-to-digital conversion;

[0030] The MCU acquisition and control module is used to control the pre-amplification, filtering, analog-to-digital conversion, and data buffering processes of the test box.

[0031] In some optional embodiments, the communication module communicates with the external communication object via wired or wireless means, and the communication module is further configured to:

[0032] In response to receiving the acquisition control command sent by the external communication object, the MCU acquisition control module controls the entire acquisition process and uploads the pre-processed data acquired by the test box to the external communication object so that the external communication object stores it as audio data.

[0033] In some optional embodiments, the method further includes:

[0034] If the health status of the transmitting crystal meets the preset warning conditions (for example, if an abnormality has occurred), an alarm will be issued in a timely manner by sending an alarm message.

[0035] In some optional embodiments, the preset evaluation strategy includes one or more of the following: first-wave polarity evaluation strategy, time-domain correlation evaluation strategy, frequency-domain correlation evaluation strategy, and peak frequency evaluation strategy.

[0036] In some optional embodiments, the first-wave polarity assessment strategy includes:

[0037] In the current working mode, the reference first wave polarity and reference first wave amplitude of each transmitting crystal time domain curve in the acoustic logging tool to be evaluated are obtained from the preset first wave data set.

[0038] From the time-domain curves of the audio data corresponding to each transmitting crystal, obtain the current first wave polarity and current first wave amplitude of each transmitting crystal;

[0039] Based on the comparison between the reference first-wave polarity and the current first-wave polarity of the time-domain curves of each transmitting crystal, if the current first-wave polarity is reversed, it is determined that the operating state of the transmitting crystal corresponding to the current first-wave polarity is abnormal; and / or,

[0040] If the difference between the current first wave amplitude and the reference first wave amplitude is not less than a preset first threshold, it is determined that the operating state of the transmitting crystal corresponding to the current first wave amplitude has become abnormal.

[0041] The abnormality in the operating state of the transmitting crystal is determined by the polarity and amplitude of the first wave in the time-domain curve.

[0042] In some optional embodiments, the time-domain correlation assessment strategy includes:

[0043] According to the preset first transmitting crystal combination strategy, any transmitting crystal combination is selected from the acoustic logging tool; wherein, each transmitting crystal combination includes two transmitting crystals;

[0044] Obtain the reference time-domain curve correlation coefficient between two emitter crystals in the current emitter crystal combination under the current operating mode from the preset time-domain correlation set;

[0045] Based on the time-domain curve of the audio data corresponding to each transmitting crystal, obtain the current curve correlation coefficient between the two transmitting crystals;

[0046] If the difference between the correlation coefficient of the reference curve of the two emitting crystals and the correlation coefficient of the current curve is not less than a preset second threshold, it is determined that at least one of the two emitting crystals is in an abnormal operating state.

[0047] In the time domain curve, the correlation coefficient between the emitting crystals is used to determine whether the operating status of the emitting crystal has become abnormal.

[0048] In some optional embodiments, the frequency domain correlation evaluation strategy includes:

[0049] According to the preset second transmitting crystal combination strategy, any transmitting crystal combination is selected from the acoustic logging tool; wherein, each transmitting crystal combination includes four transmitting crystals;

[0050] For any two transmitting crystals in the current transmitting crystal combination, obtain the reference curve correlation coefficient of the two transmitting crystals in the current operating mode from a preset frequency domain correlation set;

[0051] Based on the frequency domain curve of the audio data corresponding to each transmitting crystal, obtain the correlation coefficient of the current frequency domain curve between the two transmitting crystals;

[0052] If the difference between the correlation coefficient of the reference curve of the two emitting crystals and the correlation coefficient of the current curve is not less than a preset third threshold, it is determined that at least one of the two emitting crystals is in an abnormal operating state.

[0053] In the frequency domain curve, the correlation coefficient between the transmitting crystals is used to determine whether the operating status of the transmitting crystal has become abnormal.

[0054] In some optional embodiments, the peak frequency evaluation strategy includes:

[0055] According to the preset second transmitting crystal combination strategy, any transmitting crystal combination is selected from the acoustic logging tool; wherein, each transmitting crystal combination includes four transmitting crystals;

[0056] Based on the frequency domain curves of the audio data corresponding to the four transmitting crystals in the current transmitting crystal combination, determine the frequency corresponding to the peak value of each frequency domain curve;

[0057] Based on a preset screening strategy, abnormal frequencies are selected from the frequencies corresponding to the peak values ​​of each frequency domain curve, and it is determined that the transmitting crystal corresponding to the abnormal frequency has an anomaly. Attached Figure Description

[0058] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0059] Figure 1 This is a schematic diagram of the structure of a transmitting crystal detection device for a dipole acoustic logging tool provided in an embodiment of the present disclosure;

[0060] Figure 2 This is a schematic diagram of the structure of a probe bracket for a transmitting crystal detection device of a dipole acoustic logging tool provided in an embodiment of this disclosure;

[0061] Figure 3 This is a schematic diagram of the structure of a test box for a dipole acoustic logging tool transmitting crystal detection device provided in an embodiment of this disclosure;

[0062] Figure 4 This is a schematic diagram illustrating an application scenario of a health status assessment system for a dipole acoustic logging tool transmitting crystal, provided in an embodiment of this disclosure.

[0063] Figure 5 A flowchart illustrating a method for assessing the health status of the transmitting crystal in a dipole acoustic logging tool, provided in this embodiment of the disclosure;

[0064] Figure 6 A flowchart illustrating another method for assessing the health status of the transmitting crystal in a dipole acoustic logging tool, provided in this embodiment of the disclosure;

[0065] Figure 7 This is a schematic diagram of the X1, X2, Y1, and Y2 directions of the emitting crystal of a dipole acoustic logging tool. Detailed Implementation

[0066] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been presented in the various embodiments of the present invention to enable the reader to better understand the present invention. However, the technical solutions claimed in the present invention can be implemented even without these technical details and various changes and modifications based on the following embodiments.

[0067] To address the shortcomings of existing technologies, the purpose of this invention is to provide a new method for testing the transmitting crystal of a dipole acoustic logging instrument without disassembly. This method enables qualitative and quantitative testing of the quality and matching of the dipole acoustic transmitting crystal without disassembling the instrument, which can significantly shorten the maintenance cycle, reduce maintenance costs, and greatly improve maintenance efficiency.

[0068] Example 1:

[0069] The embodiments of the present invention relate to a transducer detection device for a dipole acoustic logging tool.

[0070] Compared to existing technologies, the embodiments of this invention enable the acquisition of acoustic signals excited by the transmitting crystal of a dipole acoustic logging tool without disassembling the transmitting acoustic system. The acquisition method is simple and fast. Furthermore, the pre-processed data can be sent to a host computer for acquisition and storage as an audio data file, allowing the host computer to further process and analyze the acoustic signals acquired by the device. This significantly shortens the maintenance cycle of the dipole acoustic logging tool's transmitting acoustic system, reduces maintenance costs, and greatly improves maintenance efficiency.

[0071] The following is a detailed description of the implementation details of the transmitting crystal detection device of the dipole acoustic logging tool in this embodiment. The following content is only for the convenience of understanding and is not necessary for implementing this solution.

[0072] like Figure 1 , Figure 2 and Figure 3 As shown, the dipole acoustic logging tool transmitting crystal detection device provided in this embodiment includes:

[0073] Probe bracket, multiple microphone probes, test box, and communication module;

[0074] The probe support is placed on the ground next to the transmitting crystal of the dipole acoustic logging tool via a support base (also called a probe support base);

[0075] The plurality of microphone probes are mounted on the movable arm end of the probe bracket and fixed by the probe clamp. The height of the plurality of microphone probes and the distance between them and the transmitting crystal of the dipole acoustic logging tool are adjustable. The plurality of microphone probes are used to convert the acoustic wave signal excited by the transmitting crystal of the dipole acoustic logging tool into an electrical signal.

[0076] The test box is connected to the plurality of microphone probes and is used to preprocess the signals collected by the plurality of microphone probes, and send the preprocessed data to an external communication object through the communication module so that the external communication object can collect and store the data.

[0077] The communication module is located inside the test box and is used for communication with the external communication object.

[0078] Specifically, the external communication object can be a host computer.

[0079] It should be noted that the test box can be connected to multiple microphone probes using XLR cables.

[0080] The number of microphone probes is equal to or not less than the number of transmitting crystals in the acoustic logging tool; the communication module is used for the test box to communicate with the host computer via wired or wireless means, for example, to receive instructions sent by the host computer and / or to send pre-processed data collected to the host computer.

[0081] The dipole acoustic logging tool transmitting crystal detection device provided in this embodiment can acquire acoustic signals excited by the transmitting crystal without disassembling the dipole acoustic logging tool's transmitting acoustic system. The acquisition method is simple and fast. Pre-processed data can also be sent to a host computer for acquisition and storage, allowing the host computer to further process and judge the data acquired by the device. This can significantly shorten the maintenance cycle of the dipole acoustic logging tool's transmitting crystal, reduce maintenance costs, and greatly improve maintenance efficiency.

[0082] Example 2:

[0083] Based on the above embodiments, this embodiment further explains and illustrates the dipole acoustic logging tool transmitting crystal detection device provided in the above embodiments.

[0084] In some embodiments, each microphone probe is used to collect acoustic wave signals from different transmitting crystals, and there is a one-to-one correspondence between the microphone probe and the transmitting crystal.

[0085] Each microphone probe is facing the center of the corresponding transmitting crystal window, and the distance between each microphone probe and the corresponding transmitting crystal is consistent.

[0086] To detect each transmitting crystal in the acoustic logging tool, it is necessary to collect the acoustic waves excited by each transmitting crystal. To ensure that the collected audio data are acoustic wave signals excited under the same operating conditions, the distance between each microphone probe and the corresponding transmitting crystal must be kept consistent.

[0087] In some embodiments, the test box includes:

[0088] The preamplifier module is used to amplify the electrical signal collected by the microphone probe to obtain an amplified electrical signal; the filter module is used to filter the amplified electrical signal to remove noise from the signal and obtain a noise-removed electrical signal.

[0089] An analog-to-digital converter module is used to convert the noise-removed analog electrical signal into a digital signal;

[0090] The data caching module is used for high-speed storage of the digital signal after analog-to-digital conversion;

[0091] The MCU acquisition and control module is used to control the preamplification, filtering, analog-to-digital conversion, and data buffering processes of the test box, and transmits the data to the host computer for acquisition and storage as an audio file through the communication module.

[0092] In some embodiments, the communication module communicates with the host computer via wired or wireless means, and the communication module is used for:

[0093] It receives acquisition control commands sent by the host computer and controls the entire acquisition process through the MCU acquisition control module; it transmits the data acquired by the test box to the host computer for acquisition and storage as an audio file.

[0094] Understandably, this communication module enables bidirectional communication with the host computer.

[0095] Specifically, the following example illustrates its application in ECLIPS 5700 cross-dipole acoustic XMAC-II:

[0096] For the probe design of this device: Design a probe bracket to mount 8 field-effect transistor large-diaphragm condenser microphone probes. The performance parameters of the microphone probes shall not be lower than the following requirements: frequency response range: 20Hz~20kHz, cardioid polar pattern, sensitivity: -27dBu, equivalent noise level: 11dB (A-weighted), signal-to-noise ratio: 81dB (ref 1k@1pascal), maximum sound pressure level: 128dB.

[0097] The support base is placed on the ground next to the transmitting crystal of the dipole acoustic logging tool. Eight condenser microphone probes are mounted on the movable arm of the probe support and fixed with probe clamps. The height of the probes and their distance from the transmitting crystal can be freely adjusted. After adjustment, the microphone probes must face the center of the transmitting crystal window of the dipole acoustic logging tool, and the distance between all microphone probes and the transmitting crystal window must remain consistent for each test, for example, 10mm.

[0098] The test box design for this device is as follows: The test box is used to pre-amplify, filter, perform analog-to-digital conversion, and buffer the signals acquired by the probe. The entire process is controlled by the MCU and the data is transmitted to the host computer for acquisition and storage via the communication module. The performance parameters of the test box design are no less than the following requirements: sampling rate 192KHz, EIN: 128dBu (A-weighted), dynamic range: -121dB (A-weighted), THD: -106dB, A / D converter: dynamic range: 120dB·THD+N: -100dB, D / A converter: dynamic range: 127dB (A-weighted)·THD+N: -115dB.

[0099] When collecting data using this device: Perform a vacuum circulation and silicone oil filling operation on the transmitting acoustic system of the dipole acoustic logging tool to be evaluated; connect the dipole acoustic instrument string and power the dipole acoustic logging tool through the logging surface system, allowing the dipole acoustic logging tool to operate normally in SUBSET 1 mode; perform the microphone probe installation and fixing operation as required; start the dipole acoustic logging tool transmitting crystal detection device test box; start the host computer and acquisition software, and collect and store 8-channel WAV format audio waveform files.

[0100] Each transmitting crystal corresponds to one sound waveform file, with a total of 8 waveforms, including: X1-LONG.WAV (long crystal in X1 direction), X1-SHORT.WAV (short crystal in X1 direction), X2-LONG.WAV (long crystal in X2 direction), X2-SHORT.WAV (short crystal in X2 direction), Y1-LONG.WAV (long crystal in Y1 direction), Y1-SHORT.WAV (short crystal in Y1 direction), Y2-LONG.WAV (long crystal in Y2 direction), and Y2-SHORT.WAV (short crystal in Y2 direction).

[0101] The dipole acoustic logging tool transmitting crystal detection device provided in this embodiment can collect acoustic signals excited by each transmitting crystal under the same operating conditions without disassembling the dipole acoustic logging tool's transmitting acoustic system. The acquisition method is simple and fast. Pre-processed data (which may include multiple data points, for example, one pre-processed data point for each transmitting crystal) can also be sent to a host computer for acquisition and storage as audio data. This allows the host computer to further process and judge the audio data, significantly shortening the maintenance cycle of the acoustic logging tool's transmitting crystals, reducing maintenance costs, and greatly improving maintenance efficiency.

[0102] Example 3:

[0103] Based on the above embodiments, this embodiment provides a health status assessment system for the transmitting crystal of a dipole acoustic logging tool.

[0104] The system provided in this embodiment can convert the acoustic signals excited by each transmitting crystal of a dipole acoustic logging tool under the same operating conditions into electrical signals without disassembling the transmitting acoustic system. After preprocessing by the test box, the data is uploaded to a host computer, where the acquisition software collects and stores it as audio data. The host computer runs graphic analysis and processing software to further process the collected audio data, which can determine whether any abnormalities have occurred in the transmitting crystals of the dipole acoustic logging tool. The dipole acoustic logging tool transmitting crystal health status assessment system provided in this embodiment can significantly shorten the maintenance cycle of the dipole acoustic logging tool transmitting acoustic system, reduce maintenance costs, and greatly improve maintenance efficiency.

[0105] The dipole acoustic logging tool transmitting crystal health status assessment system provided in this embodiment includes:

[0106] The above-described dipole acoustic logging tool emission crystal detection device;

[0107] The host computer and the acquisition software running on the host computer communicate with the test box via wired or wireless means. The host computer is used to send acquisition control commands to the test box and receive data uploaded by the test box and store it as audio data.

[0108] Based on the graphical analysis and processing software developed according to the preset evaluation strategy, the host computer runs the graphical analysis and processing software to perform first wave polarity, time domain curve correlation, frequency domain curve correlation, and peak frequency analysis on the audio data, thereby evaluating the operating status of the transmitting crystal of the dipole acoustic logging tool, and determining the health status of the transmitting crystal based on the operating status of the transmitting crystal.

[0109] Specifically, the host computer communicates bidirectionally with the test box through the test box's communication module. It can acquire the data uploaded by the test box and store it as audio data. Based on the acquired audio data, it evaluates the operating status of the transmitting crystal of the dipole acoustic logging tool through a preset evaluation strategy, thereby determining the health status of the transmitting crystal.

[0110] The health status of the emitting crystal can include: healthy (crystal performance is good), sub-healthy (performance is reduced but no cracks, and the usage needs to be monitored), damaged (small cracks appear or the crystal is completely cracked), etc.

[0111] Furthermore, the application scenarios of the dipole acoustic logging tool transmitting crystal health status assessment system provided in this embodiment can be referred to... Figure 4 , Figure 4 This is a schematic diagram illustrating an application scenario of a health status assessment system for a dipole acoustic logging tool transmitting crystal, provided in an embodiment of this disclosure.

[0112] Example 4:

[0113] Based on the above embodiments, this embodiment provides a method for assessing the health status of the transmitting crystal of a dipole acoustic logging tool.

[0114] In this embodiment, the ECLIPS 5700 cross-dipole acoustic XMAC-II is used as an example. The transmitting acoustic system of the dipole acoustic logging tool consists of four long dipole crystals, four short dipole crystals, one set of monopole crystals, and one set of quadrupole crystals. Related research has shown that understanding the timing patterns of these crystals' operation and obtaining corresponding evaluation strategies is crucial for subsequent waveform analysis.

[0115] like Figure 5 As shown in this embodiment, the method for assessing the health status of the transmitting crystal of a dipole acoustic logging tool includes the following steps:

[0116] Step 510: Perform a vacuum circulation filling operation on the transmitting acoustic system of the dipole acoustic logging tool to be evaluated to fill it with silicone oil.

[0117] In some alternative embodiments, step 510 may further include: assembling a dipole acoustic instrument string, powering it with the logging surface system, and allowing the instruments to operate normally in dipole acoustic acquisition mode (e.g., SUBSET 1 mode of the ECLIPS5700 logging system).

[0118] Step 520: Perform the installation and fixing of multiple microphone probes. Place the probe bracket base on the ground next to the transmitting crystal of the dipole acoustic logging tool; set the multiple microphone probes at the movable arm end of the probe bracket and fix them with probe clamps. Based on the preset microphone probe arrangement strategy, adjust the probe height and distance from the transmitting crystal so that the front of the microphone probe faces the center of the transmitting crystal window of the dipole acoustic logging tool, and the distance between each microphone probe and its corresponding transmitting crystal remains consistent.

[0119] When performing the microphone probe installation and fixing operation, the preset microphone probe arrangement strategy can be set as follows: ensure that the front of the microphone probe faces the center of the transmitting crystal window of the dipole acoustic logging tool, and ensure that the distance between all microphone probes and the transmitting crystal window remains consistent in each test, for example, 10mm.

[0120] Step 530: Activate the test box of the transmitting crystal detection device for the dipole acoustic logging tool;

[0121] Step 540: Start the host computer and acquisition software, and store the data uploaded by the test box as an audio data file. Each dipole emitting crystal corresponds to one audio data record. The audio data is obtained based on the sound waves excited by each emitting crystal of the dipole acoustic logging tool to be evaluated in the current working mode.

[0122] The audio data acquired by the host computer can be in WAV format, and the sampling rate should ideally be set to 192kHz or higher when acquiring the audio files. Each transmitting crystal corresponds to one audio waveform file, with a total of 8 waveforms, including: X1-LONG.WAV (long crystal in X1 direction), X1-SHORT.WAV (short crystal in X1 direction), X2-LONG.WAV (long crystal in X2 direction), X2-SHORT.WAV (short crystal in X2 direction), Y1-LONG.WAV (long crystal in Y1 direction), Y1-SHORT.WAV (short crystal in Y1 direction), Y2-LONG.WAV (long crystal in Y2 direction), and Y2-SHORT.WAV (short crystal in Y2 direction).

[0123] As an example, the X1, X2, Y1, and Y2 directions of the acoustic system emitted by the dipole acoustic logging tool can be referenced. Figure 7 .

[0124] Step 550: The host computer runs graphical analysis and processing software to analyze the audio data, and then evaluates the operating status of the transmitting crystal of the acoustic logging tool, and determines the health status of the transmitting crystal based on the operating status of the transmitting crystal. The graphical analysis and processing software is compiled according to a preset evaluation strategy.

[0125] Specifically, a graphical analysis and processing software is developed based on a preset evaluation strategy. The host computer runs the graphical analysis and processing software to analyze the WAV waveform file, thereby evaluating the operating status of the transmitting crystal of the dipole acoustic logging tool, and determining the health status of the transmitting crystal based on the operating status of the transmitting crystal.

[0126] The transmission timing of the acquired WAV waveforms was studied using a dipole acoustic logging tool. The following conclusions were drawn: When the dipole acoustic logging tool is in SUBSET 1 mode, within each cycle, the monopole T1 crystal transmits twice; the dipole X-axis crystal transmits four times; the dipole Y-axis crystal transmits four times; and the monopole T2 crystal transmits twice. The transmission interval between each transmitter is 50 ms. Simultaneously with each transmitter transmission, the logging tool's acquisition circuit acquires and stores the acoustic waveform. After the final transmission of T2, the acquired waveform is packaged and sent to the logging surface system. The entire process takes 1.7 seconds.

[0127] In some optional embodiments, the preset evaluation strategy includes one or more of the following: first-wave polarity evaluation strategy, time-domain correlation evaluation strategy, frequency-domain correlation evaluation strategy, and peak frequency evaluation strategy.

[0128] In some embodiments, the first-wave polarity assessment strategy includes:

[0129] In the current working mode, the reference first wave polarity and reference first wave amplitude of each emitting crystal in the acoustic logging tool to be evaluated are obtained from the preset first wave data set.

[0130] From the time-domain curves of the audio data corresponding to each transmitting crystal, obtain the current first wave polarity and current first wave amplitude of each transmitting crystal;

[0131] Based on the comparison between the reference first wave polarity and the current first wave polarity of each transmitting crystal, if the current first wave polarity is reversed, it is determined that the operating state of the transmitting crystal corresponding to the current first wave polarity is abnormal.

[0132] If the difference between the current first wave amplitude and the reference first wave amplitude is not less than a preset first threshold, it is determined that the operating state of the transmitting crystal corresponding to the current first wave amplitude is abnormal.

[0133] The preset first wave data set stores the first wave polarity and first wave amplitude of the transmitting crystal, and the first wave polarity and first wave amplitude stored in the preset first wave data set are called the reference first wave polarity and reference first wave amplitude; the preset first threshold can be set according to actual needs.

[0134] Specifically, by analyzing the first-wave polarity of time-domain curves acquired by various dipole acoustic logging tools, the following pattern can be observed: the reference first-wave polarity is negative in the X1 and Y1 directions, regardless of whether the crystal is long or short; and positive in the X2 and Y2 directions, regardless of whether the crystal is long or short. This first-wave polarity pattern is consistent with the physical structure of the dipole acoustic emitting crystal: the positive crystal poles in the X1 and Y1 directions face outwards, while the negative crystal poles in the X2 and Y2 directions face outwards.

[0135] As the performance of the emitting crystal deteriorates, the initial wave amplitude decreases. When a crack appears in the crystal, the initial wave amplitude decreases significantly, and polarity reversal may even occur. Therefore, the health status of the emitting crystal can be judged based on the initial wave polarity and amplitude. If the initial wave amplitude decreases significantly or the initial wave polarity reverses, it can be determined that the emitting crystal is damaged.

[0136] In some embodiments, the time-domain correlation assessment strategy includes:

[0137] According to the preset first transmitting crystal combination strategy, any transmitting crystal combination is selected from the dipole acoustic logging tool. Each transmitting crystal combination includes two transmitting crystals.

[0138] Obtain the reference time-domain curve correlation coefficient between two emitter crystals in the current emitter crystal combination under the current operating mode from the preset time-domain correlation set;

[0139] Based on the time-domain curve of the audio data corresponding to each transmitting crystal, obtain the current curve correlation coefficient between the two transmitting crystals;

[0140] If the difference between the correlation coefficient of the reference curve of the two emitting crystals and the correlation coefficient of the current curve is not less than a preset second threshold, it is determined that at least one of the two emitting crystals is in an abnormal operating state.

[0141] The preset time-domain correlation set stores the correlation coefficients between the emitting crystals in all operating modes, and the correlation coefficients stored in the preset time-domain correlation set are called the reference curve correlation coefficients; the preset second threshold can be set according to actual needs.

[0142] It should be noted that the preset first transmitting crystal combination strategy is as follows: the waveforms acquired by the long crystals X1 and Y1 have good correlation, especially the sliding correlation coefficient in the first 3000us; the waveforms acquired by the long crystals X2 and Y2 have good correlation, especially the sliding correlation coefficient in the first 3000us; the waveforms acquired by the short crystals X1 and Y1 have good correlation, especially the sliding correlation coefficient in the first 3000us; the waveforms acquired by the short crystals X2 and Y2 have good correlation, especially the sliding correlation coefficient in the first 3000us.

[0143] Specifically, correlation analysis of the acquired time-domain curves reveals the following patterns: the waveforms acquired by the X1 and Y1 long crystals show good correlation, with a sliding correlation coefficient above 0.9 for the first 3000µs; the waveforms acquired by the X2 and Y2 long crystals show good correlation, with a sliding correlation coefficient above 0.9 for the first 3000µs; the waveforms acquired by the X1 and Y1 short crystals show good correlation, with a sliding correlation coefficient above 0.9 for the first 3000µs; and the waveforms acquired by the X2 and Y2 short crystals show good correlation, with a sliding correlation coefficient above 0.9 for the first 3000µs.

[0144] By analyzing the structure and emitting circuit of the dipole emitter crystal assembly, it can be found that the physical structures and circuits of X1-LONG and Y1-LONG crystals, X1-SHORT and Y1-SHORT crystals, X2-LONG and Y2-LONG crystals, and X2-SHORT and Y2-SHORT crystals are completely identical. Therefore, for a high-performance dipole emitter crystal, the time-domain curves of X1-LONG and Y1-LONG, X1-SHORT and Y1-SHORT, X2-LONG and Y2-LONG, and X2-SHORT and Y2-SHORT should have very good correlation.

[0145] Through extensive experiments, an empirical value R² for the sliding correlation coefficient can be obtained. When the sliding correlation coefficient of the time-domain curves of X1-LONG and Y1-LONG is lower than R², it indicates that at least one of the X1-LONG and Y1-LONG crystals is damaged; when the sliding correlation coefficient of the time-domain curves of X1-SHORT and Y1-SHORT is lower than R², it indicates that at least one of the X1-SHORT and Y1-SHORT crystals is damaged; when the sliding correlation coefficient of the time-domain curves of X2-LONG and Y2-LONG is lower than R², it indicates that at least one of the X2-LONG and Y2-LONG crystals is damaged; when the sliding correlation coefficient of the time-domain curves of X2-SHORT and Y2-SHORT is lower than R², it indicates that at least one of the X2-SHORT and Y2-SHORT crystals is damaged.

[0146] In some embodiments, the frequency domain correlation assessment strategy includes:

[0147] According to the preset second transmitting crystal combination strategy, any transmitting crystal combination is selected from the dipole acoustic logging tool; wherein, each transmitting crystal combination includes four transmitting crystals;

[0148] For the four transmitting crystals in the current transmitting crystal combination, obtain the reference curve correlation coefficient between any two transmitting crystals in the current operating mode from the preset frequency domain correlation set;

[0149] Based on the frequency domain curve of the audio data corresponding to each transmitting crystal, obtain the correlation coefficient of the current curve between any two of the four transmitting crystals;

[0150] If the difference between the correlation coefficient of the reference curve of the transmitting crystal and the correlation coefficient of the current curve is not less than a preset third threshold, it is determined that at least one of the two transmitting crystals is in an abnormal operating state.

[0151] The preset frequency domain correlation set stores the correlation coefficients between the transmitting crystals in all operating modes, and the correlation coefficients stored in the preset frequency domain correlation set are called the reference curve correlation coefficients; the preset third threshold can be set according to actual needs.

[0152] It should be noted that the preset second transmitting crystal combination strategy can be: four long crystals (including X1 long crystal acquiring waveform X1-LONG, Y1 long crystal acquiring waveform Y1-LONG, X2 long crystal acquiring waveform X2-LONG, Y2 long crystal acquiring waveform Y2-LONG) and four short crystals (including X1 short crystal acquiring waveform X1-SHORT, Y1 short crystal acquiring waveform Y1-SHORT, X2 short crystal acquiring waveform X2-SHORT, Y2 short crystal acquiring waveform Y2-SHORT).

[0153] Specifically, the eight time-domain waveforms are Fourier transformed into frequency-domain curves, and the amplitude-frequency characteristics and correlations of these eight waves are analyzed.

[0154] During the assembly of dipole acoustic wave emitting crystals, the core frequency and equivalent capacitance of the crystals must be tested using an ultrasonic component analyzer. The core frequency and equivalent capacitance of the four long crystals should be basically consistent, generally around 3000-4000 Hz (the core frequency values ​​may vary between instruments from different manufacturers, but the core frequencies of the four long crystals should be basically consistent). The core frequency and equivalent capacitance of the four short crystals should also be basically consistent, generally around 1000-1200 Hz (the core frequency values ​​may vary between instruments from different manufacturers, but the core frequencies of the four short crystals should be basically consistent). Therefore, the frequency domain curves of the X1-LONG, Y1-LONG, X2-LONG, and Y2-LONG long crystals should have good correlation. The frequency domain curves of the X1-SHORT, Y1-SHORT, X2-SHORT, and Y2-SHORT short crystals should also have good correlation.

[0155] Analysis of the acquired frequency domain curves reveals the following patterns: the frequency domain curves of X1-LONG, Y1-LONG, X2-LONG, and Y2-LONG long crystals show good correlation, with correlation coefficients generally above 0.9. Similarly, the frequency domain curves of X1-SHORT, Y1-SHORT, X2-SHORT, and Y2-SHORT short crystals also show good correlation, with correlation coefficients generally above 0.9.

[0156] Through extensive experimentation, we can obtain an empirical value R3 for the correlation coefficient. The graphical analysis software can automatically calculate the correlation coefficients between any two pairs of the frequency domain curves X1-LONG, X2-LONG, Y1-LONG, and Y2-LONG of the four long crystals. If any one of these coefficients is lower than R3, it indicates that at least one of the long crystals is damaged. Similarly, the graphical analysis software can automatically calculate the correlation coefficients between any two pairs of the frequency domain curves X1-SHORT, X2-SHORT, Y1-SHORT, and Y2-SHORT of the four short crystals. If any one of these coefficients is lower than R3, it indicates that at least one of the short crystals is damaged.

[0157] In some embodiments, the peak frequency evaluation strategy includes:

[0158] According to the preset second transmitting crystal combination strategy, any transmitting crystal combination is selected from the dipole acoustic logging tool; wherein, each transmitting crystal combination includes four transmitting crystals;

[0159] Based on the frequency domain curves of the audio data corresponding to the four transmitting crystals in the current transmitting crystal combination, determine the frequency corresponding to the peak value of each frequency domain curve;

[0160] Based on a preset screening strategy, abnormal frequencies are selected from the frequencies corresponding to the peak values ​​of each frequency domain curve, and it is determined that the transmitting crystal corresponding to the abnormal frequency has an anomaly.

[0161] The preset filtering strategy includes: the peak frequency of the curve is inconsistent with the peak frequency of other curves.

[0162] Analysis of the acquired frequency domain curves reveals the following patterns: the peak values ​​of the frequency domain curves for X1-LONG, Y1-LONG, X2-LONG, and Y2-LONG long crystals correspond to the same frequency; and the first peak value of the frequency domain curves for X1-SHORT, Y1-SHORT, X2-SHORT, and Y2-SHORT short crystals corresponds to the same frequency.

[0163] When performing peak frequency analysis: By setting up graphical analysis software, you can observe that the peak frequencies of the four long crystal frequency domain curves X1-LONG, X2-LONG, Y1-LONG, and Y2-LONG should be consistent. If the peak frequencies of any curve are inconsistent, it indicates that the crystal is damaged. Similarly, the first peak frequency of the four short crystal frequency domain curves X1-SHORT, X2-SHORT, Y1-SHORT, and Y2-SHORT should be consistent. If the peak frequencies of any curve are inconsistent, it indicates that the crystal is damaged.

[0164] In some embodiments, the method further includes:

[0165] An alert message will be issued when the health status meets the preset warning conditions.

[0166] The preset warning condition can be set to indicate that an anomaly has occurred.

[0167] Optionally, warnings can be issued through audible and visual alerts, and / or by highlighting the warning on the display terminal of the host computer.

[0168] Furthermore, based on some of the patterns derived from the previous analysis, the dipole sound wave emission system can be disassembled, and the physical basis of the above patterns can be found and verified through circuit analysis and structural analysis of the dipole emission crystal assembly.

[0169] Furthermore, based on some patterns derived from the previous analysis, the dipole emitting crystal assembly can be disassembled. By observing whether cracks appear in the emitting crystal and testing the crystal parameters with an ultrasonic component analyzer, the correctness and accuracy of the patterns can be verified.

[0170] Based on this, through extensive experiments and the accumulation of experimental data from different manufacturers and types of dipole acoustic instruments, the maintenance and repair experience and patterns of different manufacturers and types of dipole acoustic emitting systems are compared horizontally. After accumulating a sufficient number of experimental samples, some empirical parameters can be derived to continuously improve and revise the methods or graphical analysis and processing software disclosed in this embodiment, thereby continuously improving the accuracy of detection.

[0171] In summary, the method provided in this application not only solves the problems of cumbersome operation, low efficiency, difficult maintenance and testing, poor quality control, high cost, and long maintenance cycle of existing maintenance technologies, but also significantly improves the timeliness and accuracy of dipole acoustic wave emitting crystal quality and matching detection, greatly improving the efficiency of dipole acoustic wave logging tool maintenance.

[0172] In addition, for easier understanding of the method disclosed in this application, please refer to Figure 6 , Figure 6 This application provides another method for assessing the health status of the transmitting crystal in a dipole acoustic logging tool.

[0173] Example 5:

[0174] Another embodiment of this application relates to an electronic device comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the dipole acoustic logging tool transmitting crystal health status assessment method of the above embodiments.

[0175] The memory and processor are connected via a bus, which can include any number of interconnecting buses and bridges, connecting various circuits of one or more processors and memories. The bus can also connect various other circuits, such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and will not be described further herein. The bus interface provides an interface between the bus and the transceiver. The transceiver can be a single element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices over a transmission medium. Data processed by the processor is transmitted over the wireless medium via an antenna, which further receives data and transmits it to the processor.

[0176] The processor manages the bus and general processing, and also provides various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. Memory is used to store data used by the processor during operation.

[0177] Example 6:

[0178] Another embodiment of this application relates to a computer-readable storage medium storing a computer program. When executed by a processor, the computer program implements the method embodiments described above.

[0179] That is, those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing related hardware. This program is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0180] In some embodiments of this application, a computer program product is also provided, including a computer program that, when executed by a processor, implements the steps of the methods described in the above embodiments.

[0181] Those skilled in the art will understand that the above embodiments are specific embodiments for implementing this application, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of this application.

Claims

1. A transducer detection device for a dipole acoustic logging tool, characterized in that, include: Probe bracket, multiple microphone probes, test box, and communication module; The probe support is placed on the ground next to the transmitting crystal of the dipole acoustic logging tool via a support base. The plurality of microphone probes are mounted on the movable arm end of the probe bracket and fixed by the probe clamp. The height of the plurality of microphone probes and the distance between them and the transmitting crystal of the dipole acoustic logging tool are adjustable. The plurality of microphone probes are used to convert the acoustic wave signal excited by the transmitting crystal of the dipole acoustic logging tool into an electrical signal. The test box is connected to the plurality of microphone probes and is used to preprocess the signals collected by the plurality of microphone probes, and send the preprocessed data to an external communication object through the communication module so that the external communication object can collect and store the data. The communication module is located inside the test box and is used for communication with the external communication object.

2. The apparatus according to claim 1, characterized in that, Each of the microphone probes is used to collect acoustic wave signals from different transmitting crystals, and there is a one-to-one correspondence between the microphone probes and the transmitting crystals; Each microphone probe is oriented toward the corresponding transmitting crystal, and the distance between each microphone probe and the corresponding transmitting crystal is consistent.

3. The apparatus according to claim 1, characterized in that, The test kit includes: The preamplifier module is used to amplify the electrical signal collected by the microphone probe to obtain the amplified electrical signal; The filtering module is used to filter the amplified electrical signal to remove noise from the signal and obtain a noise-removed electrical signal. An analog-to-digital converter module is used to convert the noise-removed analog electrical signal into a digital signal; The data buffer module is used to store the digital signal after analog-to-digital conversion; The MCU acquisition and control module is used to control the pre-amplification, filtering, analog-to-digital conversion, and data buffering processes of the test box.

4. The apparatus according to any one of claims 3, characterized in that, The communication module communicates with the external communication object via wired or wireless means, and the communication module is further used for: In response to receiving the acquisition control command sent by the external communication object, the MCU acquisition control module controls the entire acquisition process and uploads the pre-processed data acquired by the test box to the external communication object so that the external communication object stores it as audio data.

5. A health status assessment system for the transmitting crystal of a dipole acoustic logging tool, characterized in that, include: The dipole acoustic logging tool emission crystal detection device according to any one of claims 1 to 4; The host computer and the acquisition software running on the host computer communicate with the test box via wired or wireless means. The host computer is used to send acquisition control commands to the test box and receive data uploaded by the test box and store it as audio data. Based on the graphical analysis and processing software developed according to the preset evaluation strategy, the host computer runs the graphical analysis and processing software to perform first wave polarity, time domain curve correlation, frequency domain curve correlation, and peak frequency analysis on the audio data, thereby evaluating the operating status of the transmitting crystal of the dipole acoustic logging tool, and determining the health status of the transmitting crystal based on the operating status of the transmitting crystal.

6. A method for assessing the health status of the transmitting crystal in a dipole acoustic logging tool, characterized in that, Based on the system implementation of claim 5, the method includes: The acoustic system of the dipole acoustic logging tool to be evaluated is subjected to a vacuum circulation and silicone oil filling operation. Perform the installation and fixing of multiple microphone probes, placing the probe bracket on the ground next to the transmitting crystal of the dipole acoustic logging tool; set the multiple microphone probes at the movable arm end of the probe bracket and fix them with probe clamps; based on the preset microphone probe arrangement strategy, adjust the probe height and distance from the transmitting crystal so that the front of the microphone probe faces the center of the transmitting crystal window of the dipole acoustic instrument, and the distance between each microphone probe and the corresponding transmitting crystal is consistent; Activate the test box of the dipole acoustic logging tool's transmitting crystal detection device; Start the host computer and acquisition software to collect and store the data uploaded by the test box. Record one audio data for each dipole emitting crystal. The audio data is obtained based on the sound waves excited by each emitting crystal of the acoustic logging tool to be evaluated in the current working mode. The host computer runs graphical analysis and processing software to analyze the audio data, thereby evaluating the operating status of the transmitting crystal of the acoustic logging tool, and determining the health status of the transmitting crystal based on its operating status. The graphical analysis and processing software is developed according to a preset evaluation strategy.

7. The method according to claim 6, characterized in that, The method further includes: If the health status meets the preset warning conditions, a warning message will be issued.

8. The method according to claim 6, characterized in that, The preset evaluation strategy includes one or more of the following: first-wave polarity evaluation strategy, time-domain correlation evaluation strategy, frequency-domain correlation evaluation strategy, and peak frequency evaluation strategy.

9. The method according to claim 8, characterized in that, The initial polarity assessment strategy includes: In the current working mode, the reference first wave polarity and reference first wave amplitude of each transmitting crystal time domain curve in the acoustic logging tool to be evaluated are obtained from the preset first wave data set. From the time-domain curves of the audio data corresponding to each transmitting crystal, obtain the current first wave polarity and current first wave amplitude of each transmitting crystal; Based on the comparison between the reference first-wave polarity and the current first-wave polarity of the time-domain curves of each transmitting crystal, if the current first-wave polarity is reversed, it is determined that the operating state of the transmitting crystal corresponding to the current first-wave polarity is abnormal; and / or, If the difference between the current first wave amplitude and the reference first wave amplitude is not less than a preset first threshold, it is determined that the operating state of the transmitting crystal corresponding to the current first wave amplitude is abnormal.

10. The method according to claim 8, characterized in that, The time-domain correlation assessment strategy includes: According to the preset first transmitting crystal combination strategy, any transmitting crystal combination is selected from the acoustic logging tool; wherein, each transmitting crystal combination includes two transmitting crystals; Obtain the reference time-domain curve correlation coefficient between two emitter crystals in the current emitter crystal combination under the current operating mode from the preset time-domain correlation set; Based on the time-domain curve of the audio data corresponding to each transmitting crystal, obtain the current curve correlation coefficient between the two transmitting crystals; If the difference between the correlation coefficient of the reference curve of the two emitting crystals and the correlation coefficient of the current curve is not less than a preset second threshold, it is determined that at least one of the two emitting crystals is in an abnormal operating state.

11. The method according to claim 8, characterized in that, The frequency domain correlation assessment strategy includes: According to the preset second transmitting crystal combination strategy, any transmitting crystal combination is selected from the acoustic logging tool; wherein, each transmitting crystal combination includes four transmitting crystals; For any two transmitting crystals in the current transmitting crystal combination, obtain the reference curve correlation coefficient of the two transmitting crystals in the current operating mode from a preset frequency domain correlation set; Based on the frequency domain curve of the audio data corresponding to each transmitting crystal, obtain the correlation coefficient of the current frequency domain curve between the two transmitting crystals; If the difference between the correlation coefficient of the reference curve of the two emitting crystals and the correlation coefficient of the current curve is not less than a preset third threshold, it is determined that at least one of the two emitting crystals is in an abnormal operating state.

12. The method according to claim 8, characterized in that, The peak frequency evaluation strategy includes: According to the preset second transmitting crystal combination strategy, any transmitting crystal combination is selected from the acoustic logging tool; wherein, each transmitting crystal combination includes four transmitting crystals; Based on the frequency domain curves of the audio data corresponding to the four transmitting crystals in the current transmitting crystal combination, determine the frequency corresponding to the peak value of each frequency domain curve; Based on a preset screening strategy, abnormal frequencies are selected from the frequencies corresponding to the peak values ​​of each frequency domain curve, and it is determined that the transmitting crystal corresponding to the abnormal frequency has an anomaly.

13. A computer program product, comprising a computer program, characterized in that, When executed by a processor, the computer program performs the steps of the method according to any one of claims 6 to 12.

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