A method and device for obtaining sensitivity of a detector and a storage medium

Abstract

This invention discloses a method, apparatus, electronic device, and storage medium for obtaining the sensitivity of a geophone, relating to the field of geophysical exploration. The method includes: obtaining the effective sensitivity of the geophone based on the geophone's shell displacement, damping coefficient, and natural frequency, as well as the seismic wave frequency and maximum amplitude; obtaining the theoretical sensitivity of the geophone based on the geophone's first impedance value, the seismic exploration instrument's second impedance value, and the effective sensitivity; and obtaining the actual sensitivity of the geophone based on the theoretical sensitivity. The technical solution of this invention not only achieves automatic calculation and acquisition of the geophone sensitivity, improving the accuracy and efficiency of the calculation results, but also obtains a geophone sensitivity value that is appropriate, ensuring that the geophone detects strong amplitude seismic waves while avoiding overshoot of the seismic exploration instrument's receiving upper limit, thus preventing the loss of some effective signals.

Description

Technical Field

[0001] This invention relates to the field of geophysical exploration, and in particular to a method, apparatus and storage medium for obtaining detector sensitivity. Background Technology

[0002] Geophones and seismic exploration instruments are widely used in the field of seismic exploration, serving as detection and recording devices for seismic signals, respectively. Among these, the sensitivity of the geophone is a crucial factor affecting the effectiveness of seismic wave detection.

[0003] Sensitivity is a measure of a detector's ability to respond to vibration signals, such as... Figure 1 As shown, from the perspective of the signal reception amplitude of the detector itself, the higher the detector sensitivity, the stronger the received seismic wave amplitude, and the stronger the ability to detect weak signals; however, excessively high seismic wave amplitude can lead to overshoot of the upper limit of the seismic exploration instrument's reception, thus losing some effective signals. Therefore, selecting a detector with a suitable sensitivity value has become an important part of seismic exploration. In the existing technology, the sensitivity of the detector is usually selected manually based on the field environment.

[0004] However, this method of obtaining information relies entirely on the personal experience of the exploration personnel. Not only does the process require a high time cost and have low sensitivity acquisition efficiency, but the manual selection method often has a large error, resulting in low accuracy of the obtained sensitivity. Summary of the Invention

[0005] This invention provides a method, apparatus, electronic device, and storage medium for acquiring detector sensitivity, in order to solve the problem of large errors in the acquired detector sensitivity results.

[0006] According to one aspect of the present invention, a method for obtaining detector sensitivity is provided, comprising:

[0007] The effective sensitivity of the detector is obtained based on the detector's shell displacement, damping coefficient, and natural frequency, as well as the seismic wave frequency and maximum seismic wave amplitude.

[0008] The theoretical sensitivity of the geophone is obtained based on the first impedance value of the geophone, the second impedance value of the seismic exploration instrument, and the effective sensitivity.

[0009] The actual sensitivity of the detector is obtained based on the theoretical sensitivity.

[0010] The step of obtaining the actual sensitivity of the detector based on the theoretical sensitivity further includes: obtaining the actual sensitivity of the detector based on the theoretical sensitivity and environmental parameters.

[0011] The method of obtaining the effective sensitivity of the detector based on the detector's shell displacement, damping coefficient, natural frequency, seismic wave frequency, and maximum seismic wave amplitude includes: obtaining the effective sensitivity of the detector through the Laplace transform method based on the detector's shell displacement, damping coefficient, natural frequency, seismic wave frequency, and maximum seismic wave amplitude.

[0012] After obtaining the actual sensitivity of the detector based on the theoretical sensitivity, the method further includes: obtaining the sensitivity of each candidate detector; obtaining the target sensitivity among the sensitivities of each candidate detector that is closest to the theoretical sensitivity value and less than or equal to the actual sensitivity; and using the target candidate detector corresponding to the target sensitivity as the detector actually used during seismic data acquisition.

[0013] The step of obtaining the actual sensitivity of the detector based on the theoretical sensitivity includes: obtaining a first sensitivity set based on the theoretical sensitivity and a first preset step size; wherein the first sensitivity set includes multiple first sensitivities; obtaining the maximum amplitude of the first seismic wave under different combinations of first parameters based on the set of excitation charge and the first sensitivity set; wherein the set of excitation charge includes multiple excitation charge amounts; the first parameter combination includes one excitation charge amount and one first sensitivity; obtaining the target maximum amplitude of the first seismic wave that is closest to and less than or equal to the maximum amplitude value of the seismic wave among all the maximum amplitudes of the first seismic wave; and taking the target first sensitivity corresponding to the target maximum amplitude of the first seismic wave as the actual sensitivity of the detector.

[0014] After obtaining the target first seismic wave maximum amplitude that is closest to and less than or equal to the maximum seismic wave amplitude value among all the first seismic wave maximum amplitudes, the method further includes: if the difference between the maximum seismic wave amplitude and the target first seismic wave maximum amplitude is greater than or equal to a preset difference threshold, then obtaining a second sensitivity set based on the target first sensitivity corresponding to the target first seismic wave maximum amplitude and a second preset step size; wherein the second preset step size is less than the first preset step size; obtaining the second seismic wave maximum amplitude under different combinations of second parameters based on the excitation dosage set and the second sensitivity set; wherein the second parameter combination includes an excitation dosage and a second sensitivity; obtaining the target second seismic wave maximum amplitude that is closest to and less than or equal to the maximum seismic wave amplitude value among all the second seismic wave maximum amplitudes; and using the target second sensitivity corresponding to the target second seismic wave maximum amplitude as the actual sensitivity of the detector.

[0015] According to another aspect of the present invention, a detector sensitivity acquisition device is provided, comprising:

[0016] The effective sensitivity acquisition module is used to acquire the effective sensitivity of the detector based on the detector's shell displacement, damping coefficient, and natural frequency, as well as the seismic wave frequency and maximum seismic wave amplitude.

[0017] The theoretical sensitivity acquisition module is used to acquire the theoretical sensitivity of the detector based on the first impedance value of the detector, the second impedance value of the seismic exploration instrument, and the effective sensitivity.

[0018] The actual sensitivity acquisition module is used to acquire the actual sensitivity of the detector based on the theoretical sensitivity.

[0019] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0020] At least one processor; and

[0021] A memory communicatively connected to the at least one processor; wherein,

[0022] The memory stores a computer program that can be executed by the at least one processor, which enables the at least one processor to perform the detector sensitivity acquisition method according to any embodiment of the present invention.

[0023] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement the detector sensitivity acquisition method according to any embodiment of the present invention.

[0024] According to another aspect of the present invention, a computer program product is provided, comprising a computer program that, when executed by a processor, implements the detector sensitivity acquisition method described in any embodiment of the present invention.

[0025] The technical solution of this invention first obtains the effective sensitivity of the geophone based on the geophone's shell displacement, damping coefficient, and natural frequency, as well as the seismic wave frequency and maximum amplitude. Then, it obtains the theoretical sensitivity of the geophone based on the geophone's first impedance value, the seismic exploration instrument's second impedance value, and the effective sensitivity. Finally, it obtains the actual sensitivity of the geophone based on the theoretical sensitivity. This not only achieves automatic calculation and acquisition of the geophone sensitivity, improving the accuracy and efficiency of the calculation results, but also ensures that the geophone detects strong amplitude seismic waves while avoiding overshoot of the seismic exploration instrument's receiving upper limit, which could lead to the loss of some effective signals.

[0026] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram illustrating the relationship between the output signals of geophones with different sensitivities and the signals received by the seismic exploration instrument, as provided in the background art of the present invention.

[0029] Figure 2 This is a flowchart of a method for obtaining detector sensitivity according to Embodiment 1 of the present invention;

[0030] Figure 3 This is a schematic diagram of the detector amplitude characteristic curve provided in Embodiment 1 of the present invention;

[0031] Figure 4 This is a flowchart of another method for obtaining detector sensitivity according to Embodiment 2 of the present invention;

[0032] Figure 5 This is a flowchart of another method for obtaining detector sensitivity according to Embodiment 3 of the present invention;

[0033] Figure 6 This is a waveform comparison diagram of the seismic signal received by the seismic exploration instrument at a near offset distance of 10 meters to 150 meters using the detector SN5A-5 provided according to Embodiment 3 of the present invention.

[0034] Figure 7 This is a schematic diagram comparing the amplitude of seismic signals received by a seismic exploration instrument at a near offset distance of 10 meters using the SN5A-5 detector provided in Embodiment 3 of the present invention.

[0035] Figure 8 This is a waveform comparison diagram of the seismic signal received by the seismic exploration instrument at a near offset distance of 10 meters to 150 meters using the detector SN160-5 provided according to Embodiment 3 of the present invention.

[0036] Figure 9 This is a schematic diagram comparing the amplitude of seismic signals received by a seismic exploration instrument at a near offset distance of 10 meters using the SN160-5 detector provided in Embodiment 3 of the present invention.

[0037] Figure 10 This is a waveform comparison diagram of the seismic signal received by the seismic exploration instrument at a near offset distance of 10 meters to 150 meters using the detector SN240-5 provided according to Embodiment 3 of the present invention.

[0038] Figure 11 This is a schematic diagram comparing the amplitude of seismic signals received by a seismic exploration instrument at a near offset distance of 10 meters using the SN240-5 detector provided in Embodiment 3 of the present invention.

[0039] Figure 12 This is a schematic diagram of the structure of a detector sensitivity acquisition device according to Embodiment 4 of the present invention;

[0040] Figure 13 This is a schematic diagram of the structure of an electronic device that implements the detector sensitivity acquisition method of the present invention. Detailed Implementation

[0041] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0042] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0043] Example 1

[0044] Figure 2This is a flowchart of a method for obtaining detector sensitivity according to Embodiment 1 of the present invention. This embodiment is applicable to situations where the detector sensitivity is calculated and obtained based on the inherent properties of the detector and the characteristics of seismic waves. This method can be executed by the detector sensitivity acquisition device in any embodiment of the present invention. The detector sensitivity acquisition device can be implemented in hardware and / or software and can be configured in an electronic device. Figure 2 As shown, the method includes:

[0045] S101. Obtain the effective sensitivity of the detector based on the detector's housing displacement, damping coefficient, natural frequency, seismic wave frequency, and maximum seismic wave amplitude.

[0046] When a geophone is placed in the ocean or on land, its position may shift due to ocean currents or other external factors. The displacement of the outer casing, i.e., the displacement of the geophone itself, can be obtained using a displacement sensor installed within the geophone. The damping coefficient is the ratio of the rated load impedance of the power amplifier inside the geophone to the actual impedance of the power amplifier. The natural frequency is the frequency at which the displacement of the geophone changes with time according to a sine or cosine law during free vibration. For a geophone, the damping coefficient and natural frequency are inherent properties and are known values. Seismic wave frequency refers to the number of vibrations of a seismic wave, while seismic wave amplitude refers to the amplitude of vibration during the propagation of the seismic wave, used to measure the energy of the seismic wave.

[0047] The effective sensitivity of the detector can be calculated using the following equation:

[0048]

[0049] Where A0 is the seismic wave amplitude; ε0 is the detector housing displacement; h is the detector damping coefficient; n0 is the detector natural frequency; a0 is the detector effective sensitivity; and ω is the seismic wave frequency.

[0050] The maximum amplitude value ±A of the seismic wave recorded by the seismic exploration instrument can be directly obtained from the instrument. During seismic data acquisition, to ensure that the seismic exploration instrument records the seismic signal with maximum fidelity, A0 needs to be less than or equal to ±A. Figure 3 As shown in the amplitude characteristic curve of the detector, the amplitude of seismic waves close to the detector's natural frequency (i.e., its inherent frequency) is amplified. Therefore, when the seismic wave frequency ω equals the detector's natural frequency n0, the seismic signal exhibits its maximum peak value A. max Therefore, when A0 = A max When the value is ±A, the seismic exploration instrument can record seismic signals with maximum accuracy. Based on this, the effective sensitivity a0 can be calculated using the above equation.

[0051] Optionally, in this embodiment of the invention, obtaining the effective sensitivity of the detector based on the detector's shell displacement, damping coefficient, and natural frequency, as well as the seismic wave frequency and maximum seismic wave amplitude, includes: obtaining the effective sensitivity of the detector using the Laplace transform method based on the detector's shell displacement, damping coefficient, and natural frequency, as well as the seismic wave frequency and maximum seismic wave amplitude.

[0052] Specifically, the Laplace Transform, as a linear integral transform method, possesses properties such as time shift, differentiation, integration, and convolution. It transforms a function with real parameters into a function with complex parameters, thereby converting complex differential equations into algebraic equations, simplifying the solution process, reducing the computational complexity of the equations, and greatly improving the computational efficiency of effective sensitivity.

[0053] S102. Obtain the theoretical sensitivity of the detector based on the first impedance value of the detector, the second impedance value of the seismic exploration instrument, and the effective sensitivity.

[0054] During seismic data acquisition, the geophone is typically operating under load, and its input to the seismic instrument will have a certain impedance value, such as 20kΩ or 40kΩ. The geophone and seismic instrument form a loop, and its effective output is affected by its own resistance. The impedance matching connected to the seismic instrument input is as follows: Based on this, the theoretical sensitivity of the detector can be calculated using the following equation:

[0055]

[0056] Where a0 is the effective sensitivity of the detector; a is the theoretical sensitivity of the detector; R1 is the internal resistance of the detector coil; R2 is the equivalent input resistance of the seismic exploration instrument; for a given detector and seismic exploration instrument, the internal resistance R1 of the detector coil and the equivalent input resistance R2 of the seismic exploration instrument are both known values.

[0057] S103. Obtain the actual sensitivity of the detector based on the theoretical sensitivity.

[0058] The calculated theoretical sensitivity represents the sensitivity value at which the maximum amplitude of the seismic wave can be obtained under ideal conditions. Based on this, the theoretical sensitivity can be used as the actual sensitivity of the geophone, and the geophone with the sensitivity value as the actual sensitivity is selected as the geophone used in actual seismic data acquisition. In addition, in order to avoid the calculation deviation of the theoretical sensitivity caused by external factors, which would result in the maximum amplitude of the seismic wave being too large, a weight with a value less than 1 and greater than 0 can be configured for the theoretical sensitivity. The product of the theoretical sensitivity and the weight is used as the actual sensitivity, which further ensures that the amplitude of the seismic wave obtained by the geophone will not cause the upper limit of the seismic exploration instrument to be over-adjusted, thus avoiding the loss of effective signals.

[0059] Optionally, in this embodiment of the invention, obtaining the actual sensitivity of the detector based on the theoretical sensitivity further includes: obtaining the actual sensitivity of the detector based on the theoretical sensitivity and environmental parameters. Environmental parameters include noise data and temperature data. The noise data may include power supply noise, ambient noise, and noise generated by the detector itself. Noise data can interfere with the detector's output signal, causing increased fluctuations in the output signal and thus reducing sensitivity. Temperature changes can also cause changes in the performance of the electronic components inside the detector, affecting the accuracy of its output signal.

[0060] Based on this, by querying a pre-configured mapping table, a correction coefficient matching the current environmental parameters can be obtained. The theoretical sensitivity is then numerically corrected based on this correction coefficient, and the result is the actual sensitivity. The mapping table records the mapping relationship between different environmental parameters and correction coefficients. Alternatively, the environmental parameters and theoretical sensitivity can be substituted into a pre-configured calculation equation to calculate the actual sensitivity. This avoids interference from environmental parameters on the detector sensitivity and improves the accuracy of the detector sensitivity calculation results.

[0061] Optionally, in this embodiment of the invention, after obtaining the actual sensitivity of the detector based on the theoretical sensitivity, the method further includes: obtaining the sensitivity of each candidate detector; obtaining the target sensitivity among the sensitivities of each candidate detector that is closest to the theoretical sensitivity value and less than or equal to the actual sensitivity; and using the target candidate detector corresponding to the target sensitivity as the detector actually used during seismic data acquisition.

[0062] Specifically, if none of the existing geophones (i.e., backup geophones) have a sensitivity value equal to the actual sensitivity, then after obtaining the sensitivity of each candidate geophone, the target sensitivity is selected from the candidate geophones whose sensitivity is closest to the theoretical sensitivity value and less than or equal to the actual sensitivity. The geophone corresponding to the target sensitivity (i.e., the target candidate geophone) is then used as the actual geophone for seismic data acquisition. This ensures that among the existing geophones, a geophone is selected that can avoid the overshoot phenomenon of the upper limit of the seismic exploration instrument and can receive large amplitude seismic waves to the maximum extent, thus improving the detection effect of the geophone.

[0063] The technical solution of this invention first obtains the effective sensitivity of the geophone based on the geophone's shell displacement, damping coefficient, and natural frequency, as well as the seismic wave frequency and maximum amplitude. Then, it obtains the theoretical sensitivity of the geophone based on the geophone's first impedance value, the seismic exploration instrument's second impedance value, and the effective sensitivity. Finally, it obtains the actual sensitivity of the geophone based on the theoretical sensitivity. This not only achieves automatic calculation and acquisition of the geophone sensitivity, improving the accuracy and efficiency of the calculation results, but also ensures that the geophone detects strong amplitude seismic waves while avoiding overshoot of the seismic exploration instrument's receiving upper limit, which could lead to the loss of some effective signals.

[0064] Example 2

[0065] Figure 4 This is a flowchart of a method for obtaining detector sensitivity according to Embodiment 2 of the present invention. The relationship between this embodiment and the above embodiments is that, under different combinations of excitation charge and first sensitivity, the target first sensitivity corresponding to the maximum amplitude of the target first seismic wave is selected. Figure 4 As shown, the method includes:

[0066] S201. Obtain the effective sensitivity of the detector based on the detector's housing displacement, damping coefficient, natural frequency, seismic wave frequency, and maximum seismic wave amplitude.

[0067] S202. Based on the first impedance value of the detector, the second impedance value of the seismic exploration instrument, and the effective sensitivity, obtain the theoretical sensitivity of the detector.

[0068] S203. Obtain a first sensitivity set based on the theoretical sensitivity and the first preset step size; wherein, the first sensitivity set includes multiple first sensitivities.

[0069] Based on the theoretical sensitivity value, and with the first preset step size as the value of a single change, different sensitivity values ​​(i.e., first sensitivities) are obtained sequentially and formed into a set of first sensitivities. The theoretical sensitivity can be used as the minimum value, and the first preset step size can be increased sequentially; alternatively, the theoretical sensitivity can be used as the maximum value, and the first preset step size can be decreased sequentially; or the theoretical sensitivity can be used as an intermediate value, and the first preset step size can be increased sequentially, then decreased sequentially, again using the theoretical sensitivity as an intermediate value, to obtain various first sensitivities. The number of first sensitivities can be pre-configured to a fixed value or configured based on the theoretical sensitivity; the larger the theoretical sensitivity value, the more first sensitivities are obtained; the smaller the theoretical sensitivity value, the fewer first sensitivities are obtained.

[0070] Taking a theoretical sensitivity of 80V / m / s (volts per meter per second), a first preset step size of 30V / m / s, and three first sensitivities as an example, as described in the above technical solution, 80V / m / s, 110V / m / s, and 140V / m / s can be used as the first sensitivities respectively; 20V / m / s, 50V / m / s, and 80V / m / s can also be used as the first sensitivities respectively; and 50V / m / s, 80V / m / s, and 110V / m / s can also be used as the first sensitivities respectively.

[0071] S204. Based on the set of excitation charge and the first sensitivity set, obtain the maximum amplitude of the first seismic wave under different combinations of the first parameters; wherein, the set of excitation charge includes multiple excitation charges; the first parameter combination includes one excitation charge and one first sensitivity.

[0072] In this embodiment of the invention, the source of the excitation factor in the seismic data acquisition is selected as an explosive source, and various different excitation amounts are set. The specific value of the excitation amount can be obtained from the historical records of seismic data acquired in the field. Assuming that the set of excitation amounts includes M excitation amounts and the set of first sensitivities includes N first sensitivities, a total of M×N different combinations of first parameters can be obtained. The N detectors with the above different sensitivities are placed at the same position to receive seismic waves simultaneously, and the seismic signals are recorded using the same type of seismic exploration instrument, thereby obtaining M×N seismic records.

[0073] S205. Obtain the target first seismic wave maximum amplitude that is closest to the maximum amplitude value of the seismic wave and is less than or equal to the maximum amplitude value of the seismic wave among the maximum amplitude values ​​of each first seismic wave.

[0074] The maximum amplitude A of seismic waves under different combinations of the first parameter was obtained using seismic data analysis software or directly using a seismic exploration instrument. max (that is, the maximum amplitude of the first seismic wave), and A maxCompare the maximum seismic wave amplitude value ±A in the above technical solution, and select the value of A that is less than or equal to ±A and closest to ±A. max The target is the maximum amplitude of the first seismic wave.

[0075] S206. The target first sensitivity corresponding to the maximum amplitude of the first seismic wave of the target is taken as the actual sensitivity of the detector.

[0076] Taking the above technical solution as an example, the target's first sensitivity (assumed to be 50V / m / s) corresponding to the maximum amplitude of the first seismic wave is used as the actual sensitivity of the detector. Thus, based on the theoretical sensitivity (80V / m / s), an accurate sensitivity value is obtained further according to the experimental results, improving the accuracy of the detector's sensitivity calculation results. At the same time, the target excitation charge corresponding to the maximum amplitude of the first seismic wave is also the optimal charge to ensure that the seismic exploration instrument records the maximum amplitude of the seismic wave. This avoids both the waste of excitation charge and the large error in the seismic wave detection results caused by insufficient excitation charge.

[0077] Optionally, in this embodiment of the invention, after obtaining the target first seismic wave maximum amplitude that is closest to and less than or equal to the maximum seismic wave amplitude value among the various first seismic wave maximum amplitudes, the method further includes: if the difference between the maximum seismic wave amplitude and the target first seismic wave maximum amplitude is greater than or equal to a preset difference threshold, then obtaining a second sensitivity set based on the target first sensitivity corresponding to the target first seismic wave maximum amplitude and a second preset step size; wherein the second preset step size is less than the first preset step size; obtaining the second seismic wave maximum amplitude under different combinations of second parameters based on the excitation dosage set and the second sensitivity set; wherein the second parameter combination includes an excitation dosage and a second sensitivity; obtaining the target second seismic wave maximum amplitude that is closest to and less than or equal to the maximum seismic wave amplitude value among the various second seismic wave maximum amplitudes; and using the target second sensitivity corresponding to the target second seismic wave maximum amplitude as the actual sensitivity of the detector.

[0078] Specifically, taking the above technical solution as an example, if the maximum amplitude value of the seismic wave ± A is different from the maximum amplitude A of the target first seismic wave obtained by the above calculation... maxIf the error between the two is large, that is, the difference between the two is greater than the preset difference threshold, it means that the detector at the current sensitivity is receiving a weaker amplitude of the seismic wave and has a poorer ability to detect weak signals. In order to improve the detection capability, it is necessary to continue to obtain a second sensitivity set based on the target first sensitivity corresponding to the maximum amplitude of the target first seismic wave (for example, 50V / m / s in the above technical solution) and the second preset step size. The second preset step size is smaller than the first preset step size. Assuming that the first preset step size is 30V / m / s in the above technical solution, the second preset step size can be 10V / m / s.

[0079] Similarly, using the target's first sensitivity as the base value and the second preset step size as the single-change value, different sensitivity values ​​(i.e., second sensitivities) are obtained sequentially and formed into a set of second sensitivities. The target's first sensitivity can be used as the minimum value, and the second preset step size can be increased sequentially; the target's first sensitivity can be used as the maximum value, and the second preset step size can be decreased sequentially; or the target's first sensitivity can be used as an intermediate value, and the second preset step size can be increased sequentially, then decreased sequentially, again using the target's first sensitivity as an intermediate value, to obtain various second sensitivities. The number of second sensitivities can be pre-configured to a fixed value or configured based on the target's first sensitivity. The larger the target's first sensitivity value, the more second sensitivities are obtained; the smaller the target's first sensitivity value, the fewer second sensitivities are obtained.

[0080] Specifically, the target's first sensitivity and theoretical sensitivity can be used as thresholds at both ends, and a second preset step size can be used as the single change step size to obtain various second sensitivities. For example, when the target's first sensitivity and theoretical sensitivity are 50V / m / s and 80V / m / s respectively, 10V / m / s can be used as the second preset step size, and 60V / m / s and 70V / m / s can be used as second sensitivities accordingly. Then, based on the set of excitation doses and the set of second sensitivities, the maximum amplitude of the second seismic wave under different combinations of second parameters can be obtained. Then, among the maximum amplitudes of the second seismic wave, the target's maximum amplitude of the second seismic wave that is closest to the maximum amplitude value of the seismic wave and is less than or equal to the maximum amplitude value of the seismic wave can be obtained.

[0081] The target's second sensitivity, corresponding to the maximum amplitude of the second seismic wave, is used as the actual sensitivity of the geophone. Based on the theoretical sensitivity and the target's first sensitivity, an accurate sensitivity value is obtained through experimental results, further improving the accuracy of the geophone's sensitivity calculation. At the same time, the target excitation charge corresponding to the maximum amplitude of the second seismic wave is also the optimal charge to ensure that the seismic exploration instrument records the maximum amplitude of the seismic wave. This avoids both wasting the excitation charge and preventing large errors in the seismic wave detection results due to insufficient excitation charge.

[0082] The technical solution of this invention first obtains multiple maximum amplitudes of first seismic waves based on theoretical sensitivity, a first preset step size, and a set of excitation charges; then, it identifies the target maximum amplitude of the first seismic wave among these maximum amplitudes; finally, it uses the target first sensitivity corresponding to the target maximum amplitude of the first seismic wave as the actual sensitivity of the detector. Thus, based on the theoretical sensitivity, an accurate sensitivity value is obtained through experimental results, avoiding interference from external factors that could lead to deviations in the detector sensitivity calculation results, thereby improving the accuracy of the detector sensitivity calculation results.

[0083] Example 3

[0084] Figure 5 This is a flowchart of a method for obtaining detector sensitivity according to Embodiment 3 of the present invention. The relationship between this embodiment and the above embodiments is that, for example, the excitation dose set includes four excitation doses, and the first sensitivity set includes three first sensitivities. Figure 5 As shown, the method includes:

[0085] S301. Obtain the effective sensitivity of the detector based on the detector's housing displacement, damping coefficient, natural frequency, seismic wave frequency, and maximum seismic wave amplitude.

[0086] Taking a 3D seismic detection project as an example, this project uses well shot excitation with excitation factors of 3 wells * 18m * 8kg. The seismic exploration instrument uses an eSeis split-type node receiver with a preamplifier gain of 12dB and a maximum recordable amplitude of 0.625V. There are three types of alternative geophones: the first is SN5A-5 with a sensitivity of 80V / m / s and a coil resistance of 1850Ω; the second is SN160-5 with a sensitivity of 160V / m / s and a coil resistance of 2350Ω; and the third is SN240-5 with a sensitivity of 240V / m / s and a coil resistance of 4950Ω. All other parameters of the above three geophones are the same.

[0087] The displacement ε0 of the detector housing is 0.002 m; the detector damping coefficient h is 0.6; the detector natural frequency n0 is 5 Hz; the seismic exploration instrument can record a maximum seismic wave amplitude A = ±0.625V. During seismic data acquisition, in order to ensure that the seismic exploration instrument records seismic signals with maximum accuracy, A0 ≤ ±0.625V is required. When ω = n0 = 5 Hz, the amplitude A output by the detector is... max Maximum. Therefore, when A0 = A max When the value is ±0.625, the seismic exploration instrument can record seismic signals with maximum distortion. At this time, the effective sensitivity of the detector can be calculated as 75V / m / s according to the above formula.

[0088] S302. Obtain the theoretical sensitivity of the detector based on the first impedance value of the detector, the second impedance value of the seismic exploration instrument, and the effective sensitivity.

[0089] The internal resistance R1 of the detector coil is 1920Ω, and the equivalent input resistance R2 of the seismic exploration instrument is 40kΩ. According to Formula 2 above, the theoretical sensitivity of the detector can be calculated to be 80V / m / s.

[0090] S303. Obtain a first sensitivity set based on the theoretical sensitivity and the first preset step size; wherein, the first sensitivity set includes three first sensitivities.

[0091] The first preset step size is defined as 80V / m / s, and the theoretical sensitivity is taken as the minimum value. The number of first sensitivities is configured to be three, thus obtaining three first sensitivities of 80V / m / s, 160V / m / s and 240V / m / s respectively.

[0092] S304. Based on the set of excitation charges and the first set of sensitivity, obtain the maximum amplitude of the first seismic wave under different combinations of the first parameters; wherein, the set of excitation charges includes four excitation charges; the first parameter combination includes one excitation charge and one first sensitivity.

[0093] Based on the excitation factor used in the construction area being 3 excitation charges * 18m * 8kg, four different excitation charge dosages were set: 3 excitation charges * 18m * 10kg, 3 excitation charges * 18m * 8kg, 3 excitation charges * 18m * 6kg, and 3 excitation charges * 18m * 4kg. As described in the above technical solution, the three first sensitivities and four excitation charge dosages can yield a total of 12 different combinations of first parameters, and the maximum amplitude of the first seismic wave under each of these 12 combinations can be obtained.

[0094] S305. Obtain the target first seismic wave maximum amplitude that is closest to the maximum amplitude value of the seismic wave and is less than or equal to the maximum amplitude value of the seismic wave among the maximum amplitude values ​​of each first seismic wave.

[0095] S306. The target first sensitivity corresponding to the maximum amplitude of the first seismic wave of the target is taken as the actual sensitivity of the detector.

[0096] like Figures 6 to 11As shown, when the detector sensitivity reaches 160V / m / s or higher and the excitation charge reaches 24kg or higher, the maximum amplitude of the seismic wave received by the detector at a near offset (10m) reaches ±0.625V of the maximum recordable amplitude value of the seismic exploration instrument, indicating an overshoot phenomenon. The detector SN5A-5 with a sensitivity of 80V / m / s did not exhibit an overshoot phenomenon in amplitude at near offsets (10-150m). Therefore, the detector SN5A-5 with a sensitivity of 80V / m / s was selected as the detector used for seismic data acquisition.

[0097] The technical solution of this invention not only realizes the calculation and acquisition of detector sensitivity, improving the accuracy and efficiency of the calculation results, but also obtains a detector sensitivity value that is appropriate, ensuring that the detector can detect strong amplitude seismic waves while avoiding the phenomenon of overshooting the upper limit of the seismic exploration instrument's reception, which would lead to the loss of some effective signals.

[0098] Example 4

[0099] Figure 12 This is a structural block diagram of a detector sensitivity acquisition device provided in Embodiment 4 of the present invention. The device specifically includes:

[0100] The effective sensitivity acquisition module 401 is used to acquire the effective sensitivity of the detector based on the detector's shell displacement, damping coefficient, and natural frequency, as well as the seismic wave frequency and maximum seismic wave amplitude.

[0101] The theoretical sensitivity acquisition module 402 is used to acquire the theoretical sensitivity of the detector based on the first impedance value of the detector, the second impedance value of the seismic exploration instrument, and the effective sensitivity.

[0102] The actual sensitivity acquisition module 403 is used to acquire the actual sensitivity of the detector based on the theoretical sensitivity.

[0103] The technical solution of this invention first obtains the effective sensitivity of the geophone based on the geophone's shell displacement, damping coefficient, and natural frequency, as well as the seismic wave frequency and maximum amplitude. Then, it obtains the theoretical sensitivity of the geophone based on the geophone's first impedance value, the seismic exploration instrument's second impedance value, and the effective sensitivity. Finally, it obtains the actual sensitivity of the geophone based on the theoretical sensitivity. This not only achieves automatic calculation and acquisition of the geophone sensitivity, improving the accuracy and efficiency of the calculation results, but also ensures that the geophone detects strong amplitude seismic waves while avoiding overshoot of the seismic exploration instrument's receiving upper limit, which could lead to the loss of some effective signals.

[0104] Optionally, the actual sensitivity acquisition module 403 is specifically used to acquire the actual sensitivity of the detector based on the theoretical sensitivity and environmental parameters.

[0105] Optionally, the effective sensitivity acquisition module 401 is specifically used to acquire the effective sensitivity of the detector by means of the Laplace transform method based on the detector's shell displacement, damping coefficient and natural frequency, as well as the seismic wave frequency and maximum seismic wave amplitude.

[0106] Optionally, the detector sensitivity acquisition device is also used to acquire the sensitivity of each candidate detector; acquire the target sensitivity of each candidate detector that is closest to the theoretical sensitivity value and less than or equal to the actual sensitivity; and use the target candidate detector corresponding to the target sensitivity as the detector actually used during seismic data acquisition.

[0107] Optionally, the actual sensitivity acquisition module 403 is specifically used to acquire a first sensitivity set based on the theoretical sensitivity and a first preset step size; wherein the first sensitivity set includes multiple first sensitivities; acquire the maximum amplitude of the first seismic wave under different combinations of first parameters based on the excitation charge set and the first sensitivity set; wherein the excitation charge set includes multiple excitation charges; the first parameter combination includes one excitation charge and one first sensitivity; acquire the target maximum amplitude of the first seismic wave that is closest to and less than or equal to the maximum amplitude value of the seismic wave among the various maximum amplitudes of the first seismic wave; and use the target first sensitivity corresponding to the target maximum amplitude of the first seismic wave as the actual sensitivity of the detector.

[0108] Optionally, the actual sensitivity acquisition module 403 is further configured to: if the difference between the maximum amplitude of the seismic wave and the maximum amplitude of the target first seismic wave is greater than or equal to a preset difference threshold, then acquire a second sensitivity set based on the target first sensitivity corresponding to the maximum amplitude of the target first seismic wave and a second preset step size; wherein the second preset step size is less than the first preset step size; acquire the maximum amplitude of the second seismic wave under different combinations of second parameters based on the set of excitation dosage and the second sensitivity set; wherein the second parameter combination includes an excitation dosage and a second sensitivity; acquire the target maximum amplitude of the second seismic wave that is closest to the maximum amplitude of the seismic wave and less than or equal to the maximum amplitude of the seismic wave among all the maximum amplitudes of the second seismic wave; and use the target second sensitivity corresponding to the target maximum amplitude of the second seismic wave as the actual sensitivity of the detector.

[0109] The above-described apparatus can execute the detector sensitivity acquisition method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the method. Technical details not described in detail in this embodiment can be found in the detector sensitivity acquisition method provided in any embodiment of the present invention.

[0110] Example 5

[0111] Figure 13 A schematic diagram of an electronic device 10 that can be used to implement embodiments of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, electronic devices, blade electronic devices, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (such as helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0112] like Figure 13 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 may also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0113] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0114] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as methods for acquiring detector sensitivity.

[0115] In some embodiments, the method for acquiring detector sensitivity can be implemented as a computer program tangibly contained in a computer-readable storage medium, such as a storage unit. In some embodiments, part or all of the computer program can be loaded and / or installed on a heterogeneous hardware accelerator via ROM and / or a communication unit. When the computer program is loaded into RAM and executed by a processor, one or more steps of the method for acquiring detector sensitivity described above can be performed. Alternatively, in other embodiments, the processor can be configured to perform the method for acquiring detector sensitivity by any other suitable means (e.g., by means of firmware).

[0116] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0117] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, as a standalone software package partially on a machine and partially on a remote machine, or entirely on a remote machine or electronic device.

[0118] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0119] To provide user interaction, the systems and techniques described herein can be implemented on a heterogeneous hardware accelerator, which includes: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the heterogeneous hardware accelerator. Other types of devices can also be used to provide user interaction; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or haptic feedback); and input from the user can be received in any form (including sound input, voice input, or haptic input).

[0120] The systems and technologies described herein can be implemented in computing systems that include back-end components (e.g., as data electronic devices), or computing systems that include middleware components (e.g., application electronic devices), or computing systems that include front-end components (e.g., a user computer with a graphical user interface or web browser through which a user can interact with implementations of the systems and technologies described herein), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., a communication network). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0121] A computing system can include clients and electronic devices. Clients and electronic devices are generally geographically separated and typically interact via communication networks. The client-electronic device relationship is created by computer programs running on the respective computers and establishing a client-electronic device relationship between them. Electronic devices can be cloud electronic devices, also known as cloud computing electronic devices or cloud servers, which are hosting products within the cloud computing service ecosystem. These address the shortcomings of traditional physical hosting and VPS services, such as high management difficulty and weak business scalability.

[0122] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0123] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for obtaining detector sensitivity, characterized in that, include: The effective sensitivity of the detector is obtained based on the detector's shell displacement, damping coefficient, and natural frequency, as well as the seismic wave frequency and maximum seismic wave amplitude. The theoretical sensitivity of the geophone is obtained based on the first impedance value of the geophone, the second impedance value of the seismic exploration instrument, and the effective sensitivity. The actual sensitivity of the detector is obtained based on the theoretical sensitivity.

2. The method according to claim 1, characterized in that, The step of obtaining the actual sensitivity of the detector based on the theoretical sensitivity also includes: Based on the theoretical sensitivity and environmental parameters, the actual sensitivity of the detector is obtained.

3. The method according to claim 1, characterized in that, The method of obtaining the effective sensitivity of the geophone based on the geophone's shell displacement, damping coefficient, and natural frequency, as well as the seismic wave frequency and maximum seismic wave amplitude, includes: The effective sensitivity of the detector is obtained by using the Laplace transform method based on the detector's shell displacement, damping coefficient, natural frequency, seismic wave frequency, and maximum seismic wave amplitude.

4. The method according to claim 1, characterized in that, After obtaining the actual sensitivity of the detector based on the theoretical sensitivity, the following steps are also included: Obtain the sensitivity of each candidate detector; Among the sensitivities of each of the candidate detectors, the target sensitivity is the one that is closest to the theoretical sensitivity value and is less than or equal to the actual sensitivity. The target candidate detectors corresponding to the target sensitivity are used as the detectors actually used during seismic data acquisition.

5. The method according to claim 1, characterized in that, The step of obtaining the actual sensitivity of the detector based on the theoretical sensitivity includes: A first sensitivity set is obtained based on the theoretical sensitivity and the first preset step size; wherein, the first sensitivity set includes multiple first sensitivities; Based on the set of excitation charges and the first set of sensitivities, the maximum amplitude of the first seismic wave under different combinations of first parameters is obtained; wherein, the set of excitation charges includes multiple excitation charges; the combination of first parameters includes one excitation charge and one first sensitivity. Among the maximum amplitudes of each of the first seismic waves, the target maximum amplitude of the first seismic wave that is closest to the maximum amplitude value of the seismic wave and is less than or equal to the maximum amplitude value of the seismic wave is obtained. The target first sensitivity corresponding to the maximum amplitude of the first seismic wave of the target is taken as the actual sensitivity of the detector.

6. The method according to claim 5, characterized in that, After obtaining the target first seismic wave maximum amplitude that is closest to and less than or equal to the maximum amplitude value of each of the first seismic waves, the method further includes: If the difference between the maximum amplitude of the seismic wave and the maximum amplitude of the target first seismic wave is greater than or equal to a preset difference threshold, then a second sensitivity set is obtained based on the target first sensitivity corresponding to the maximum amplitude of the target first seismic wave and a second preset step size; wherein the second preset step size is less than the first preset step size; Based on the set of excitation doses and the second set of sensitivities, the maximum amplitude of the second seismic wave under different combinations of second parameters is obtained; wherein, the combination of second parameters includes an excitation dose and a second sensitivity. Among the maximum amplitudes of each second seismic wave, the target maximum amplitude of the second seismic wave that is closest to the maximum amplitude value of the seismic wave and is less than or equal to the maximum amplitude value of the seismic wave is obtained. The target second sensitivity corresponding to the maximum amplitude of the target second seismic wave is taken as the actual sensitivity of the detector.

7. A device for acquiring detector sensitivity, characterized in that, include: The effective sensitivity acquisition module is used to acquire the effective sensitivity of the detector based on the detector's shell displacement, damping coefficient, and natural frequency, as well as the seismic wave frequency and maximum seismic wave amplitude. The theoretical sensitivity acquisition module is used to acquire the theoretical sensitivity of the detector based on the first impedance value of the detector, the second impedance value of the seismic exploration instrument, and the effective sensitivity. The actual sensitivity acquisition module is used to acquire the actual sensitivity of the detector based on the theoretical sensitivity.

8. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, which enables the at least one processor to perform the method for obtaining detector sensitivity according to any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the method for obtaining detector sensitivity according to any one of claims 1-6.

10. A computer program product comprising a computer program that, when executed by a processor, implements the method for obtaining the detector sensitivity according to any one of claims 1-6.

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