A measurement method and system based on micro-water test in borehole

Abstract

The present application discloses a measurement method and system based on a micro-water test in a borehole. The method comprises the following steps: performing a micro-water test based on a plurality of reference observation holes, obtaining a plurality of groups of initial hydrogeological data, observed water level depths and measured vibration frequencies of the rock and soil layers in the target test section; obtaining correction coefficients based on the observed water level depths of the respective reference observation holes, and obtaining a correction coefficient group; comparing the measured vibration frequency with a corresponding preset vibration frequency threshold, and obtaining a vibration frequency comparison result; performing data preprocessing on a plurality of groups of initial hydrogeological data, and obtaining a plurality of groups of preprocessed hydrogeological data; deriving standard curve data of the rock and soil layers of the reference observation holes under the influence of the positive thin wall effect in a borehole test simulation model; performing curve matching based on the corresponding standard curve, and identifying the positive thin wall of the borehole and the thin wall influencing factor; and obtaining the hydrogeological parameters of the rock and soil layers in the target test section. The present application improves the test effect of the micro-water test.

Description

Technical Field

[0001] The present application relates to the technical field of measuring hydrogeological parameters of water layers, and in particular to a measurement method and system thereof based on a micro-water test in a borehole. Background Art

[0002] Slug test is a simple and relatively fast field test method for determining the hydrogeological parameters of rock and soil layers. It originated abroad and has different translations, such as heavy hammer test, borehole oscillation test, impact test, constant volume instantaneous pumping or injection test, or directly transliterated as slug test, etc. The existing traditional test methods for hydrogeological parameters of water layers include pumping test, injection test, etc. These traditional tests have obvious advantages and disadvantages in actual application. Pumping test consumes a lot of manpower and material resources, the test is complicated and time-consuming, the data recording of injection test is more troublesome, and the results are often not accurate enough.

[0003] The micro-water test is a relatively new test method for obtaining the hydrogeological parameters of aquifers in a small range near the borehole. Its principle is to increase / decrease the amount of water in the borehole slightly in an instant, thereby causing the water level in the borehole to rise / fall over time, study its change law over time, and then obtain the hydrogeological parameters of the aquifer; the micro-water test has the characteristics of short test cycle (several hours or even tens of seconds), simple equipment, less manpower and material resources, and relatively accurate results; but at present, the micro-water test has not been included in the specification in the field of geotechnical engineering investigation, and because the residual mud or broken fine particles during drilling and well formation penetrate into the pores of the aquifer around the borehole, the water permeability of the aquifer medium near the borehole is reduced, resulting in the permeability of the medium around the borehole being less than the permeability of the aquifer, which will produce a positive thin-wall effect, and the positive thin-wall effect has a greater impact on the results of the micro-water test. Therefore, there is a defect that the test effect of the micro-water test is low, and there is room for improvement. Summary of the invention

[0004] In order to improve the test effect of the micro-water test, the present application provides a measurement method and system based on the micro-water test in a borehole.

[0005] In the first aspect, the invention objective of the present application is achieved by adopting the following technical solutions:

[0006] A measurement method based on a micro-water test in a borehole, comprising:

[0007] Based on the acquired geological data of the target test section, multiple reference observation holes are drilled in the target test section; based on the multiple reference observation holes, micro-water tests are performed to obtain multiple groups of initial hydrogeological data of the rock and soil layers of the target test section, corresponding observed water level depths, and corresponding measured vibration frequencies;

[0008] Based on the observed water level depth of each benchmark observation hole, a correction coefficient is obtained to obtain a correction coefficient group; the measured vibration frequencies of multiple groups of initial hydrogeological data are compared with the corresponding preset vibration frequency thresholds to obtain a vibration frequency comparison result;

[0009] Preprocessing the multiple groups of initial hydrogeological data in turn according to the vibration frequency comparison results and the corresponding correction coefficients to obtain the multiple groups of preprocessed hydrogeological data;

[0010] In the preset borehole test simulation model, the standard curve data of the rock and soil layer of the corresponding benchmark observation hole under the influence of the positive thin wall effect when the micro-water test is carried out in the borehole is derived based on the pre-processed multiple groups of hydrogeological data;

[0011] Curve matching is performed based on the preprocessed multiple groups of hydrogeological data and the standard curve corresponding to the standard curve data, the positive thin wall and thin wall influencing factor of the boreholes of the multiple benchmark observation holes are identified, and the hydrogeological data of each benchmark observation hole are updated to obtain the hydrogeological parameters of the rock and soil layers of the target test area.

[0012] By adopting the above technical scheme, in order to improve the test effect of the micro-water test in the target test area, when conducting the micro-water test, while obtaining the initial hydrogeological data of multiple benchmark observation holes, the corresponding observed water level depth and the corresponding measured vibration frequency are obtained, and the correction coefficient is obtained based on the observed water level depth to obtain the correction coefficient group of the depth of the rock and soil layer, so as to facilitate the subsequent analysis of whether it is necessary to perform parameter correction and other data processing operations on the initial hydrogeological data. At the same time, the measured vibration frequency is compared with the corresponding preset vibration frequency threshold. According to the vibration frequency comparison result, it is judged that when the test personnel perform the micro-water test, the vibration frequency state of the micro-water test equipment affects the hydrogeological data. Then, the data preprocessing is performed one by one on the multiple groups of initial hydrogeological data. , and obtain multiple sets of pre-processed hydrogeological parameters, which is beneficial to improve the data accuracy of the hydrogeological parameters of the target test section and reduce measurement errors and random errors; at the same time, in order to consider the influence of the positive thin-wall effect generated during drilling on the micro-water test results, in the drilling test simulation model, based on the pre-processed multiple sets of hydrogeological data, the standard curve data of the rock and soil layer of the corresponding benchmark observation hole under the influence of the positive thin-wall effect when the micro-water test is carried out in the borehole are derived, and the positive thin wall and thin-wall influence factors of the boreholes of multiple benchmark observation holes are calculated to analyze the degree of interference of the test observation layer (referring to the rock and soil layer) around the borehole of each benchmark observation hole. The hydrogeological parameters of the rock and soil layer of the target test section obtained thereby have high accuracy, thereby achieving the purpose of improving the test effect of the micro-water test.

[0013] In a preferred example of the present application, the micro-water test is performed based on the plurality of the reference observation holes to obtain a plurality of groups of initial hydrogeological data of the rock and soil layers of the target test area, the corresponding observed water level depths and the corresponding measured vibration frequencies, including:

[0014] Dividing the observation water level at multiple depths in the same reference observation hole to obtain different observation water level depths based on the same reference observation hole, and dividing the rock and soil layer of the corresponding reference observation hole into multiple rock and soil observation layers according to the different observation water level depths;

[0015] Based on the rock and soil observation stratification with different observation water levels in the same reference observation hole, a micro-water test is performed through a micro-water test equipment, and corresponding initial hydrogeological data of multiple groups of different observation water level depths of the rock and soil layers in the target test section are obtained; a frequency instrument for obtaining the vibration frequency signal of the micro-water test equipment is arranged on the micro-water test equipment; the measured vibration frequency of the micro-water test equipment before the water head raising test and the water head lowering test is obtained through the frequency instrument.

[0016] By adopting the above technical scheme, multiple rock and soil observation layers are divided based on the same benchmark observation hole to analyze the changes in hydrogeological data of rock and soil layers at different depths. The initial hydrogeological data obtained by measuring multiple benchmark observation holes at the same depth are compared and extracted to show the data changes in the rock and soil layers at the same depth of each group of initial hydrogeological data. The parameters obtained by the micro-water test are relatively complete and the measurement accuracy is high. At the same time, in order to effectively avoid unreasonable measurement errors of the micro-water test equipment due to unreasonable measurement personnel or measurement methods before the micro-water test equipment conducts a head increase test or a head decrease test, the present application also provides a frequency instrument for obtaining the vibration frequency signal of the micro-water test equipment on the micro-water test equipment. When it is detected that the vibration frequency signal of the micro-water test equipment is less than a preset frequency threshold, the micro-water test is performed, which is conducive to providing a high-precision micro-water test method.

[0017] In a preferred example of the present application, the plurality of reference observation holes include reference test holes and calibration reference holes; the correction coefficients are obtained based on the observed water level depths of the respective reference observation holes to obtain a correction coefficient group, including:

[0018] Based on the observed water level depth in the reference observation hole, the rock and soil layer thickness and single-layer permeability coefficient of the corresponding rock and soil observation layer are obtained, and based on the rock and soil layer thickness and single-layer permeability coefficient, the equivalent permeability coefficient of the rock and soil layer at different observed water level depths of the reference test hole is obtained; the equivalent permeability coefficient of the rock and soil layer includes the equivalent permeability coefficient of the first rock and soil layer and the equivalent permeability coefficient of the second rock and soil layer of the reference test hole;

[0019] Obtaining a first rock-soil layer equivalent permeability coefficient group and a second rock-soil layer equivalent permeability coefficient group through multiple micro-water tests, and calculating first mean error data of the first rock-soil layer equivalent permeability coefficient group and second mean error data of the second rock-soil layer equivalent permeability coefficient group respectively;

[0020] When the first mean error data or the second mean error data is greater than a preset mean error threshold, determining the equivalent permeability coefficient of the third rock and soil layer at the preset target position of the reference observation hole;

[0021] The correction coefficient is obtained according to the difference between the equivalent permeability coefficient of the first rock and soil layer and the equivalent permeability coefficient of the second rock and soil layer, the permeability coefficient of the third rock and soil layer, and the corresponding observed water level depth to obtain a correction coefficient group.

[0022] By adopting the above technical scheme, combined with the comparison of the mean error data and the mean error threshold, the actuarial accuracy of the first rock and soil layer equivalent coefficient and the second rock and soil layer equivalent coefficient of multiple different observed water level depths obtained from the micro-water test is calculated. When the first mean error data or the second mean error data is greater than the preset mean error threshold, it indicates that the micro-water test does not meet the relevant test execution standards, such as "NB / T 35117-2018 Hydropower Engineering Borehole Oscillation Permeability Test Procedure". At this time, the correction coefficient of the observed water level depth of the current test is obtained through the equivalent permeability coefficient of the third rock and soil layer. After completing the micro-water test work of all benchmark observation holes, the corresponding correction coefficient group is obtained to improve the calculation accuracy and efficiency of the equivalent permeability coefficient of the rock and soil layer.

[0023] In a preferred example of the present application: the data preprocessing is performed on the multiple groups of the initial hydrogeological data in sequence according to the vibration frequency comparison result and the corresponding correction coefficient group to obtain the preprocessed multiple groups of the hydrogeological data, including: when the measured vibration frequency is less than the corresponding preset vibration frequency threshold, the corresponding initial hydrogeological data is corrected based on the corresponding correction coefficient;

[0024] When the measured vibration frequency is greater than the corresponding preset vibration frequency threshold, based on the initial hydrogeological data corresponding to the measured vibration frequency, a text box for parameter input is sent to a preset user test terminal, and data preprocessing information of the user test terminal is obtained; and the corresponding initial hydrogeological data is preprocessed based on the data preprocessing information;

[0025] A plurality of groups of pre-processed hydrogeological data are obtained.

[0026] By adopting the above technical scheme, when the measured vibration frequency is less than the corresponding vibration frequency threshold, it indicates that the micro-water test conducted at this time meets the data measurement accuracy requirements, and the measurement error caused by the influence of the measurement environment or improper measurement method during the measurement process of the measurement personnel is eliminated. At this time, the initial hydrogeological data can be directly corrected. When the measured vibration frequency is greater than the corresponding preset vibration frequency threshold, it indicates that there may be a measurement error. Based on the information prompt in the text box and the method for obtaining data preprocessing information, the test personnel connected to the user test terminal are prompted to judge whether data preprocessing is needed according to their own operating conditions and professional knowledge, and the preprocessed data obtained by the solution is input through the text box, so as to facilitate data preprocessing of the initial hydrogeological data based on the data preprocessing information.

[0027] In a preferred example of the present application, the method includes:

[0028] In the preset drilling test simulation model, formula (1) and formula (2) are used to solve the curve change function under the influence of positive thin wall effect:

[0029]

[0030] In formula (1), H D (τ) is the dimensionless form of water level change, τ represents dimensionless time, t is time; i is a positive integer, V i ′ is the average value of the comprehensive coefficients of the multiple benchmark observation holes at the current observation water level depth, is the initial drilling test simulation model equation, which is used to characterize the water level change in dimensionless form, δ i is the influence coefficient preset based on different types of benchmark observation holes; in formula (2), α is the thin wall influence factor, γ represents the size of the well pipe storage effect, and the size of β reflects whether the difference in permeability between the two layers has a greater impact or the difference in the well pipe storage effect has a greater impact under this strength ratio; I 0 (x) is the first kind of modified Bessel function, k 0 (x) is the modified Bessel function of the second kind, a 1 、c 1 、a 2 、c 2 is a constant coefficient.

[0031] By adopting the above technical scheme, the equations and solution conditions of the drilling test simulation model are converted into dimensionless form through dimensionless factors and parameters, and the drilling test simulation model under the influence of the positive thin-wall effect of the borehole is solved. At the same time, the data changes of the hydrogeological data are solved based on different types of benchmark observation holes, so as to facilitate the subsequent analysis of the influence of the positive thin-wall effect of each benchmark observation hole through the wiring method.

[0032] In a preferred example of the present application, the method of matching the preprocessed multiple groups of hydrogeological data with the standard curve corresponding to the standard curve data to identify the positive thin walls and thin wall influencing factors of the boreholes of the multiple reference observation holes includes:

[0033] The actual test curve of the current test is drawn through the standard curve data, so that the actual test curve and the standard test curve are aligned on the ordinate axis, and then the actual test curve is translated along the abscissa axis to fit the actual test curve with the standard test curve, and the α value, β value and γ value corresponding to the fitted standard test curve are recorded. At the same time, any matching point is selected, and the corresponding coordinate values ​​[τ] and [t] are recorded to calculate the aquifer permeability coefficient K1 and aquifer water storage rate S of the current measured benchmark observation hole. 1 , positive thin-wall permeability coefficient K B and positive thin-wall layer water storage rate S 2 .

[0034] By adopting the above technical solution, it is convenient to calculate the hydrogeological parameters of the benchmark observation hole through the curve matching method.

[0035] In a preferred example of the present application: the calculation of the aquifer permeability coefficient K1 and the aquifer water storage rate S of the currently measured reference observation hole 1 , positive thin-wall permeability coefficient K B and positive thin-wall layer water storage rate S 2 ,include:

[0036] Calculate the aquifer storage rate S based on formula (3): 1 :

[0037]

[0038] Calculate the water storage rate S of the positive thin wall layer based on formula (4): 2 :

[0039] S 2 =β 2 *S 1 / α (4)

[0040] The permeability coefficient K1 of the aquifer is calculated based on formula (5):

[0041]

[0042] Based on formula (6), the permeability coefficient K of the positive thin wall layer is calculated B :

[0043] K B =K1 / α (6)

[0044] In the formula, r cis the radius of the borehole casing; B is the thickness of the confined aquifer; γ represents the size of the wellbore storage effect, τ represents the dimensionless time, and r w is the radius of the drilled tube.

[0045] By adopting the above technical scheme, the drilling flower tube is a flower tube with holes opened on the side of the tube. The flower tube is water-permeable and the casing is water-impermeable. When drilling, a hole is drilled on site to the bottom of the aquifer to be tested, and the soil sample above the bottom of the aquifer is taken out of the borehole. At the same time, the flower tube is lowered to the test section with a length the same as the thickness of the test section. The upper part of the flower tube is connected to a water-impermeable dead pipe as a casing. Then, a multifunctional probe that can automatically record water level data is placed in the wellbore (dead pipe and the inside of the flower tube) about 2 meters below the water level with a rope and waits for the water level to stabilize, so as to determine the drilling test simulation model of the aquifer under the influence of the positive thin wall effect, and analyze and solve the positive thin wall and thin wall influencing factors of the drilling of multiple benchmark observation holes.

[0046] In the second aspect, the invention objective of the present application is achieved by adopting the following technical solutions:

[0047] A measurement system based on micro-water test in a borehole, the system comprising:

[0048] The observation hole formation and micro-water test module is used to drill holes in the target test section to form multiple reference observation holes based on the acquired geological data of the target test section; perform micro-water tests based on the multiple reference observation holes to obtain multiple groups of initial hydrogeological data of the rock and soil layers of the target test section, the corresponding observation water level depths and the corresponding measurement vibration frequencies;

[0049] The correction coefficient acquisition and vibration frequency comparison module is used to obtain the correction coefficient based on the observed water level depth of each benchmark observation hole to obtain a correction coefficient group; compare the measured vibration frequencies of multiple groups of initial hydrogeological data with the corresponding preset vibration frequency thresholds to obtain vibration frequency comparison results;

[0050] A data preprocessing module, used for sequentially preprocessing the multiple groups of the initial hydrogeological data according to the vibration frequency comparison result and the corresponding correction coefficient, to obtain the multiple groups of preprocessed hydrogeological data;

[0051] A standard curve data acquisition module is used to derive standard curve data of the rock and soil layer of the corresponding reference observation hole under the influence of positive thin wall effect when a micro-water test is carried out in the borehole based on multiple groups of pre-processed hydrogeological data in a preset borehole test simulation model;

[0052] The hydrogeological data acquisition module performs curve matching based on the preprocessed multiple groups of hydrogeological data and the standard curve corresponding to the standard curve data, identifies the positive thin walls and thin wall influencing factors of the boreholes of the multiple benchmark observation holes; updates the hydrogeological data of each benchmark observation hole, and obtains the hydrogeological parameters of the rock and soil layers of the target test area.

[0053] By adopting the above technical scheme, in order to improve the test effect of the micro-water test in the target test area, when conducting the micro-water test, while obtaining the initial hydrogeological data of multiple benchmark observation holes, the corresponding observed water level depth and the corresponding measured vibration frequency are obtained, and the correction coefficient is obtained based on the observed water level depth to obtain the correction coefficient group of the depth of the rock and soil layer, so as to facilitate the subsequent analysis of whether it is necessary to perform parameter correction and other data processing operations on the initial hydrogeological data. At the same time, the measured vibration frequency is compared with the corresponding preset vibration frequency threshold. According to the vibration frequency comparison result, it is judged that when the test personnel perform the micro-water test, the vibration frequency state of the micro-water test equipment affects the hydrogeological data. Then, the data preprocessing is performed one by one on the multiple groups of initial hydrogeological data. , and obtain multiple sets of pre-processed hydrogeological parameters, which is beneficial to improve the data accuracy of the hydrogeological parameters of the target test section and reduce measurement errors and random errors; at the same time, in order to consider the influence of the positive thin-wall effect generated during drilling on the micro-water test results, in the drilling test simulation model, based on the pre-processed multiple sets of hydrogeological data, the standard curve data of the rock and soil layer of the corresponding benchmark observation hole under the influence of the positive thin-wall effect when the micro-water test is carried out in the borehole are derived, and the positive thin wall and thin-wall influence factors of the boreholes of multiple benchmark observation holes are calculated to analyze the degree of interference of the test observation layer (referring to the rock and soil layer) around the borehole of each benchmark observation hole. The hydrogeological parameters of the rock and soil layer of the target test section obtained thereby have high accuracy, thereby achieving the purpose of improving the test effect of the micro-water test.

[0054] In a preferred example, the present application also includes a micro-water test device for conducting a micro-water test, wherein the micro-water test device includes a metal oscillator, wherein the metal oscillator includes a top cylinder and a bottom cylinder for connecting a traction rope, wherein the top end of the bottom cylinder is detachably connected to the top cylinder, and the tail end of the bottom cylinder is conical; a plurality of cylinders are connected end to end and detachably connected between the top cylinder and the bottom cylinder.

[0055] By adopting the above technical scheme, since vibrators with different volume requirements are needed due to differences in the permeability of rock and soil layers, different pore sizes of filter pipes, etc. when conducting micro-water tests, this application provides a multi-size, detachable metal oscillator on this basis. Testers can lengthen or shorten the metal oscillator according to their own test needs, which is conducive to improving the convenience of metal rock and soil layer exploration work and has high value for promotion and application.

[0056] In summary, the present application includes at least one of the following beneficial technical effects:

[0057] 1. In order to improve the test effect of the micro-water test in the target test area, when conducting the micro-water test, while obtaining the initial hydrogeological data of multiple benchmark observation holes, the corresponding observed water level depth and the corresponding measured vibration frequency are obtained, and the correction coefficient is obtained based on the observed water level depth to obtain the correction coefficient group of the depth of the rock and soil layer, so as to facilitate the subsequent analysis of whether it is necessary to perform parameter correction and other data processing operations on the initial hydrogeological data. At the same time, the measured vibration frequency is compared with the corresponding preset vibration frequency threshold. According to the vibration frequency comparison result, it is judged that when the test personnel perform the micro-water test, the vibration frequency state of the micro-water test equipment affects the data of the hydrogeological data. Then, the multiple groups of initial hydrogeological data are preprocessed one by one to obtain the pre-processed data. The processed multiple groups of hydrogeological parameters are conducive to improving the data accuracy of the hydrogeological parameters of the target test section and reducing measurement errors and random errors. At the same time, in order to consider the influence of the positive thin-wall effect generated during drilling on the micro-water test results, in the drilling test simulation model, the standard curve data of the rock and soil layer of the corresponding benchmark observation hole under the influence of the positive thin-wall effect when the micro-water test is carried out in the borehole are derived based on the pre-processed multiple groups of hydrogeological data, and the positive thin wall and thin-wall influence factors of the boreholes of multiple benchmark observation holes are calculated to analyze the interference degree of the test observation layer (referring to the rock and soil layer) around the borehole of each benchmark observation hole. The hydrogeological parameters of the rock and soil layer of the target test section obtained thereby have high accuracy, thereby achieving the purpose of improving the test effect of the micro-water test.

[0058] 2. When the measured vibration frequency is less than the corresponding vibration frequency threshold, it indicates that the micro-water test conducted at this time meets the data measurement accuracy requirements, and the measurement error caused by the influence of the measurement environment or improper measurement method during the measurement process of the measurement personnel is eliminated. At this time, the initial hydrogeological data can be directly corrected. When the measured vibration frequency is greater than the corresponding preset vibration frequency threshold, it indicates that there may be a measurement error. Based on the information prompt in the text box and the method for obtaining data preprocessing information, the test personnel connected to the user test terminal are prompted to judge whether data preprocessing is required based on their own operating conditions and professional knowledge, and the preprocessed data obtained by the solution is input through the text box, so as to facilitate data preprocessing of the initial hydrogeological data based on the data preprocessing information;

[0059] 3. When conducting micro-water tests, vibrators with different volume requirements are needed due to differences in the permeability of rock and soil layers, different pore sizes of filter pipes, etc. On this basis, this application provides a multi-size, detachable metal oscillator. Testers can lengthen or shorten the metal oscillator according to their own test needs, which is conducive to improving the convenience of metal rock and soil layer exploration work and has high value for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 is a flow chart of a measurement method based on a micro-water test in a borehole in an embodiment of the present application;

[0061] Figure 2 This is a flow chart of step S1 in a measurement method based on a micro-water test in a borehole in an embodiment of the present application;

[0062] Figure 3 This is a flow chart of step S2 in a measurement method based on a micro-water test in a borehole in one embodiment of the present application. DETAILED DESCRIPTION

[0063] The present application is further described in detail below in conjunction with the accompanying drawings.

[0064] In one embodiment, if Figure 1 As shown, the present application discloses a measurement method based on a micro-water test in a borehole, which specifically includes the following steps:

[0065] S1: Based on the acquired geological data of the target test area, multiple benchmark observation holes are drilled in the target test area; micro-water tests are performed based on the multiple benchmark observation holes to obtain multiple groups of initial hydrogeological data of the rock and soil layers of the target test area, the corresponding observed water level depths and the corresponding measured vibration frequencies.

[0066] In this embodiment, the radial distance between two adjacent reference observation holes does not exceed a preset distance threshold, which can be set specifically according to geological data of the target test site, such as a preset distance threshold of 90CM-110CM.

[0067] Specifically, a plurality of different observation water level depths may be set for the same reference observation hole based on the thickness distribution of the rock and soil layers, and the measured vibration frequency is the vibration frequency value measured by the micro-water test equipment during the micro-water test.

[0068] S2: Obtain correction coefficients based on the observed water level depths of each benchmark observation hole to obtain a correction coefficient group; compare the measured vibration frequencies of multiple groups of initial hydrogeological data with corresponding preset vibration frequency thresholds to obtain vibration frequency comparison results.

[0069] In this embodiment, the initial hydrogeological data include the equivalent permeability coefficient of the rock and soil layer and the measurement vibration frequency, and the correction coefficient is a correction value corresponding to the equivalent permeability coefficient of the rock and soil layer.

[0070] Specifically, it is convenient for subsequent analysis whether it is necessary to perform data processing operations such as parameter correction on the initial hydrogeological data. At the same time, the measured vibration frequency is compared with the corresponding preset vibration frequency threshold. According to the vibration frequency comparison result, it is judged how much the vibration frequency state of the micro-water test equipment affects the hydrogeological data when the test personnel perform the micro-water test. Then, the multiple groups of initial hydrogeological data are preprocessed one by one to obtain multiple groups of preprocessed hydrogeological parameters, which is beneficial to improve the data accuracy of the hydrogeological parameters of the target test section and reduce measurement errors and random errors. When the measured vibration frequency of the initial hydrogeological data is less than the corresponding preset vibration frequency threshold, it is characterized that the measurement method of the initial hydrogeological data meets the test specification requirements and has high accuracy.

[0071] S3: Preprocessing the multiple groups of initial hydrogeological data in turn according to the vibration frequency comparison results and the corresponding correction coefficient groups to obtain multiple groups of preprocessed hydrogeological data.

[0072] In this embodiment, data preprocessing includes data correction, abnormal data and invalid data filtering and other data processing operations.

[0073] S4: In the preset borehole test simulation model, the standard curve data of the rock and soil layer of the corresponding benchmark observation hole under the influence of the positive thin-wall effect when the micro-water test is carried out in the borehole is derived based on the pre-processed multiple groups of hydrogeological data.

[0074] In this embodiment, the drilling test simulation model stores thin-wall influence factors based on different types of geological data at different observation water level depths and under the influence of the positive thin-wall effect, and stores HD-τ standard curves corresponding to different thin-wall influence factors.

[0075] S5: Curve matching is performed based on the preprocessed multiple groups of hydrogeological data and the standard curve corresponding to the standard curve data to identify the positive thin wall and thin wall influencing factors of the boreholes of multiple benchmark observation holes; the hydrogeological data of each benchmark observation hole is updated to obtain the hydrogeological parameters of the rock and soil layers of the target test area.

[0076] Specifically, a curve plot is made based on the standard curve data of the rock and soil layer of the benchmark observation hole under the influence of the positive thin wall effect to obtain the HD-τ observation curve of the current observation; the matching method is used to identify and determine the positive thin wall of the borehole and the thin wall influencing factor, and the permeability coefficient and water storage rate of the aquifer corresponding to the test section of the benchmark observation hole are determined. The water temperature geological data of the benchmark observation hole obtained by preliminary calculation are corrected and updated accordingly to obtain the hydrogeological data of the rock and soil layer of the target test section.

[0077] In one embodiment, if Figure 2As shown, in step S1, a micro-water test is performed based on multiple reference observation holes to obtain multiple groups of initial hydrogeological data of the rock and soil layers of the target test area, the corresponding observed water level depths and the corresponding measured vibration frequencies, including:

[0078] S11: Divide the observation water levels into multiple depths in the same benchmark observation hole to obtain different observation water level depths based on the same benchmark observation hole, and divide the rock and soil layer of the corresponding benchmark observation hole into multiple rock and soil observation layers according to the different observation water level depths.

[0079] S12: Based on the rock and soil observation stratification with different observation water levels in the same benchmark observation hole, a micro-water test is performed using micro-water test equipment to obtain multiple groups of initial hydrogeological data of different observation water level depths of the rock and soil layers in the target test area.

[0080] In this embodiment, multiple rock and soil observation layers are divided based on the same benchmark observation hole to analyze the changes in hydrogeological data of rock and soil layers at different depths. The initial hydrogeological data obtained by measuring multiple benchmark observation holes at the same depth are compared and extracted, and the data changes of each group of initial hydrogeological data in the rock and soil layers at the same depth are compared. The parameters obtained by the micro-water test are relatively complete and the measurement accuracy is high.

[0081] S13: A frequency instrument for obtaining a vibration frequency signal of the micro-water test equipment is arranged on the micro-water test equipment; the measured vibration frequency of the micro-water test equipment before performing a water head raising test and a water head lowering test is obtained through the frequency instrument.

[0082] In this embodiment, the frequency instrument is arranged on the oscillator of the micro-water test equipment or at the connection between the oscillator and the traction rope; in order to effectively avoid unreasonable measurement errors of the micro-water test equipment due to unreasonable measurement personnel or measurement methods before the micro-water test equipment conducts a head increase test or a head decrease test, the present application also provides a frequency instrument for obtaining the vibration frequency signal of the micro-water test equipment on the micro-water test equipment. When it is detected that the vibration frequency signal of the micro-water test equipment is less than a preset frequency threshold, the micro-water test is performed, which is conducive to providing a high-precision micro-water test method.

[0083] In one embodiment, if Figure 3 As shown, in step S2, the multiple reference observation holes include reference test holes and calibration reference holes; based on the observed water level depth of each reference observation hole, a correction coefficient is obtained to obtain a correction coefficient group, which specifically includes:

[0084] S21: Based on the observed water level depth in the benchmark observation hole, the rock and soil layer thickness and single-layer permeability coefficient of the corresponding rock and soil observation layer are obtained; based on the rock and soil layer thickness and single-layer permeability coefficient, the equivalent permeability coefficient of the rock and soil layer at different observed water level depths of the benchmark test hole is obtained; the equivalent permeability coefficient of the rock and soil layer includes the equivalent permeability coefficient of the first rock and soil layer and the equivalent permeability coefficient of the second rock and soil layer of the benchmark test hole.

[0085] S22: obtaining the first rock and soil layer equivalent permeability coefficient group and the second rock and soil layer equivalent permeability coefficient group through multiple micro-water tests, and calculating the first mean error data of the first rock and soil layer equivalent coefficient group and the second mean error data of the second rock and soil layer equivalent permeability coefficient group respectively.

[0086] Specifically, the number of first rock and soil layer equivalent permeability coefficients in the first rock and soil layer equivalent permeability coefficient group at the same observed water level depth is not less than 4, and the number of second rock and soil layer equivalent permeability coefficients in the second rock and soil layer equivalent permeability coefficient group at the same observed water level depth is not less than 4.

[0087] S23: When the first mean error data or the second mean error data is greater than a preset mean error threshold, the equivalent permeability coefficient of the third rock and soil layer at the preset target position of the reference observation hole is determined.

[0088] In this embodiment, the actuarial accuracy of the first rock and soil layer equivalent coefficient and the second rock and soil layer equivalent coefficient of multiple different observed water level depths obtained from the micro-water test is compared with the mean error data and the mean error threshold; when the first mean error data or the second mean error data is greater than the preset mean error threshold, it indicates that the micro-water test does not comply with the relevant test execution standards, such as "NB / T 35117-2018 Hydropower Engineering Borehole Oscillation Permeability Test Procedure".

[0089] Specifically, the preset target position is the center position of the test section where the corresponding benchmark observation hole is located when the first mean error data or the second mean error data is greater than the preset mean error threshold. A micro-water test is performed again at the preset target position to determine the equivalent permeability coefficient of the corresponding third rock and soil layer.

[0090] S24: Obtain a correction coefficient according to the difference between the equivalent permeability coefficient of the first rock and soil layer and the equivalent permeability coefficient of the second rock and soil layer, the permeability coefficient of the third rock and soil layer, and the corresponding observed water level depth to obtain a correction coefficient group.

[0091] Specifically, assuming that the equivalent permeability coefficient of the first rock and soil layer is K1, the equivalent permeability coefficient of the second rock and soil layer is K2, the correction coefficient r=k1 / k3+(K1-K2 / K1+K2).

[0092] In one embodiment, in step S3, multiple groups of initial hydrogeological data are preprocessed in sequence according to the vibration frequency comparison results and the corresponding correction coefficient groups to obtain multiple groups of preprocessed hydrogeological data, including:

[0093] S31: When the measured vibration frequency is less than the corresponding preset vibration frequency threshold, the corresponding initial hydrogeological data is corrected based on the corresponding correction coefficient.

[0094] In this embodiment, when the measured vibration frequency is less than the corresponding vibration frequency threshold, it indicates that the micro-water test conducted at this time meets the data measurement accuracy requirements, and the measurement errors caused by the influence of the measurement environment or improper measurement methods during the measurement process are eliminated. At this time, the initial hydrogeological data can be directly corrected.

[0095] S32: When the measured vibration frequency is greater than the corresponding preset vibration frequency threshold, based on the initial hydrogeological data corresponding to the measured vibration frequency, a text box for parameter input is sent to a preset user test terminal, and data preprocessing information of the user test terminal is obtained; and the corresponding initial hydrogeological data is preprocessed based on the data preprocessing information.

[0096] Specifically, when the measured vibration frequency is greater than the corresponding preset vibration frequency threshold, it indicates that there may be a measurement error. Based on the information prompt in the text box and the method of obtaining data preprocessing information, the test personnel connected to the user test terminal are prompted to judge whether data preprocessing is needed based on their own operating conditions and professional knowledge, and input the preprocessed data obtained by solving the solution through the text box, so as to perform data preprocessing through the instruction modification method of the data processing instruction, so as to facilitate data preprocessing of the initial hydrogeological data based on the data preprocessing information.

[0097] S33: Obtain multiple sets of pre-processed hydrogeological data.

[0098] In one embodiment, a measurement method based on a micro-water test in a borehole further includes:

[0099] In the preset drilling test simulation model, formula (1) and formula (2) are used to solve the curve change function under the influence of positive thin wall effect:

[0100]

[0101] In formula (1), H D (τ) is the dimensionless form of water level change, τ represents dimensionless time, t is time; i is a positive integer, V i ′ is the average comprehensive coefficient of multiple benchmark observation holes at the current observation water level depth, is the initial drilling test simulation model equation, which is used to characterize the water level change in dimensionless form, δ i is the influence coefficient preset based on different types of benchmark observation holes; for example, when the observation well formed corresponding to the benchmark observation hole is a pressure-bearing complete well, then δ i Take the value of 0.366. When the observation well corresponding to the benchmark observation hole is a complete submersible well, then δ i The value is 0.733.

[0102] In formula (2), α is the thin-wall influence factor, γ represents the size of the well pipe storage effect, and the size of β reflects whether the difference in permeability between the two layers has a greater impact or the difference in the well pipe storage effect has a greater impact under this strength ratio; I 0 (x) is the first kind of modified Bessel function, k 0 (x) is the modified Bessel function of the second kind, a 1 、c 1 、a 2 、c 2 is a constant coefficient.

[0103] Specifically, H D (τ) is After the Laplace transformation, the water level change is dimensionless form after the inverse Laplace transformation using the AWG algorithm.

[0104] In one embodiment, in step S5, curve matching is performed based on the preprocessed multiple groups of hydrogeological data and the standard curve corresponding to the standard curve data to identify the positive thin wall of the boreholes and the thin wall influencing factors of the multiple reference observation holes, including:

[0105] S51: Draw the actual test curve of the current test through the standard curve data, align the vertical axis of the actual test curve with the standard test curve, and then translate the actual test curve along the horizontal axis to fit the actual test curve with the standard test curve, and record the α value, β value and γ value corresponding to the fitted standard test curve. At the same time, select a matching point, record the corresponding coordinate values ​​[τ] and [t], and calculate the aquifer permeability coefficient K1 and aquifer water storage rate S of the current measured benchmark observation hole. 1 , positive thin-wall permeability coefficient K B and positive thin-wall layer water storage rate S 2 .

[0106] In this embodiment, the permeability coefficient K1 and the water storage rate S of the aquifer of the currently measured reference observation hole are calculated. 1 , positive thin-wall permeability coefficient K B and positive thin-wall layer water storage rate S 2 ,include:

[0107] Calculate the aquifer storage rate S based on formula (3): 1 :

[0108]

[0109] Calculate the water storage rate S of the positive thin wall layer based on formula (4): 2 :

[0110] S 2 =β 2 *S 1 / α (4)

[0111] The permeability coefficient K1 of the aquifer is calculated based on formula (5):

[0112]

[0113] Based on formula (6), the permeability coefficient K of the positive thin wall layer is calculated B :

[0114] K B =K1 / α (6)

[0115] In the formula, r c is the radius of the borehole casing; B is the thickness of the confined aquifer; γ represents the size of the wellbore storage effect, τ represents the dimensionless time, and r w is the radius of the drilled tube.

[0116] Specifically, the drilling flower pipe is a flower pipe with holes opened on the side of the pipe. The flower pipe is water-permeable, and the casing is water-impermeable. When drilling, a hole is drilled on site to the bottom of the aquifer to be tested, and the soil sample above the bottom of the aquifer is taken out of the borehole. At the same time, the flower pipe is lowered to the test section with a length the same as the thickness of the test section. The upper part of the flower pipe is connected to a water-impermeable dead pipe as a casing. Then, a multifunctional probe that can automatically record water level data is placed in the wellbore (the dead pipe and the inside of the flower pipe) about 2 meters below the water level with a rope and wait for the water level to stabilize, so as to determine the drilling test simulation model of the aquifer under the influence of the positive thin wall effect, and analyze and solve the positive thin wall and thin wall influencing factors of the borehole of multiple benchmark observation holes.

[0117] It should be understood that the serial numbers of the steps in the above embodiments do not imply a sequence of execution. The execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0118] In one embodiment, a measurement system based on a borehole micro-water test is provided, and the measurement system based on a borehole micro-water test corresponds to a measurement method based on a borehole micro-water test in the above embodiment.

[0119] A measurement system based on micro-water test in a borehole includes an observation hole formation and micro-water test module, a correction coefficient acquisition and vibration frequency comparison module, a data preprocessing module and a standard curve data acquisition module. The detailed description of each functional module is as follows:

[0120] The observation hole formation and micro-water test module is used to drill holes in the target test area to form multiple reference observation holes based on the acquired geological data of the target test area; conduct micro-water tests based on the multiple reference observation holes to obtain multiple groups of initial hydrogeological data of the rock and soil layers of the target test area, the corresponding observation water level depth and the corresponding measurement vibration frequency;

[0121] The correction coefficient acquisition and vibration frequency comparison module is used to obtain the correction coefficient based on the observed water level depth of each benchmark observation hole to obtain a correction coefficient group; compare the measured vibration frequencies of multiple groups of initial hydrogeological data with the corresponding preset vibration frequency thresholds to obtain vibration frequency comparison results;

[0122] A data preprocessing module is used to perform data preprocessing on multiple groups of initial hydrogeological data in turn according to the vibration frequency comparison results and the corresponding correction coefficients to obtain multiple groups of preprocessed hydrogeological data;

[0123] A standard curve data acquisition module is used to derive standard curve data of the rock and soil layer of the corresponding reference observation hole under the influence of positive thin wall effect when a micro-water test is carried out in the borehole based on multiple groups of pre-processed hydrogeological data in a preset borehole test simulation model;

[0124] The hydrogeological data acquisition module matches the preprocessed multiple groups of hydrogeological data with the standard curve corresponding to the standard curve data, identifies the positive thin wall and thin wall influencing factors of the boreholes of multiple benchmark observation holes; updates the hydrogeological data of each benchmark observation hole, and obtains the hydrogeological parameters of the rock and soil layers of the target test area.

[0125] Optionally, a measurement system based on a micro-water test in a borehole also includes a micro-water test device for performing a micro-water test, the micro-water test device includes a metal oscillator, the metal oscillator includes a top cylinder and a bottom cylinder for connecting a traction rope, the top end of the bottom cylinder is detachably connected to the top cylinder, and the tail end of the bottom cylinder is conical; a plurality of sections of cylinders connected end to end and detachably connected are also connected between the top cylinder and the bottom cylinder, and the maximum cross-sectional area of ​​the top cylinder is the same as the maximum cross-sectional area of ​​the cylinder. Specifically, in actual application, the top cylinder and the bottom cylinder are detachably connected by threaded connection, and the multi-section cylinders are connected by threaded connection end to end.

[0126] For the specific definition of a measurement system based on a micro-water test in a borehole, please refer to the definition of a measurement method based on a micro-water test in a borehole above, which will not be repeated here; each module in the above-mentioned measurement system based on a micro-water test in a borehole can be fully or partially implemented by software, hardware and a combination thereof; each of the above-mentioned modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute the corresponding operations of each of the above modules.

[0127] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0128] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments may still be modified, or some of the features thereof may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A measurement method based on a micro-water test in a borehole, characterized in that: include: Based on the acquired geological data of the target test section, multiple reference observation holes are drilled in the target test section; based on the multiple reference observation holes, micro-water tests are performed to obtain multiple groups of initial hydrogeological data of the rock and soil layers of the target test section, corresponding observed water level depths, and corresponding measured vibration frequencies; Based on the observed water level depth of each benchmark observation hole, a correction coefficient is obtained to obtain a correction coefficient group; the measured vibration frequencies of multiple groups of initial hydrogeological data are compared with the corresponding preset vibration frequency thresholds to obtain a vibration frequency comparison result; Preprocessing the multiple groups of initial hydrogeological data in turn according to the vibration frequency comparison results and the corresponding correction coefficient groups to obtain the multiple groups of preprocessed hydrogeological data; In the preset borehole test simulation model, the standard curve data of the rock and soil layer of the corresponding benchmark observation hole under the influence of the positive thin wall effect when the micro-water test is carried out in the borehole is derived based on the pre-processed multiple groups of hydrogeological data; According to the pre-processed multiple groups of hydrogeological data and the standard curve corresponding to the standard curve data, the positive thin wall of the borehole and the thin wall influencing factor of the multiple reference observation holes are identified; the hydrogeological data of each reference observation hole is updated to obtain the hydrogeological parameters of the rock and soil layer of the target test section; The step of obtaining a plurality of groups of initial hydrogeological data of the rock and soil layers of the target test site, corresponding observed water level depths, and corresponding measured vibration frequencies includes: Dividing the observation water level at multiple depths in the same reference observation hole to obtain different observation water level depths based on the same reference observation hole, and dividing the rock and soil layer of the corresponding reference observation hole into multiple rock and soil observation layers according to the different observation water level depths; Based on the rock and soil observation stratification at different observation water levels of the same reference observation hole, a micro-water test is performed through a micro-water test device to obtain a plurality of groups of initial hydrogeological data at different observation water level depths of the rock and soil layers of the target test section; a frequency instrument for obtaining the vibration frequency signal of the micro-water test device is arranged on the micro-water test device; the measured vibration frequency of the micro-water test device before the water head rise test and the water head fall test is obtained through the frequency instrument; The plurality of reference observation holes include reference test holes and calibration reference holes; the correction coefficient group is obtained, including: Based on the observed water level depth in the reference observation hole, the rock and soil layer thickness and single-layer permeability coefficient of the corresponding rock and soil observation layer are obtained, and based on the rock and soil layer thickness and single-layer permeability coefficient, the equivalent permeability coefficient of the rock and soil layer at different observed water level depths of the reference test hole is obtained; the equivalent permeability coefficient of the rock and soil layer includes the equivalent permeability coefficient of the first rock and soil layer and the equivalent permeability coefficient of the second rock and soil layer of the reference test hole; Obtaining a first rock-soil layer equivalent permeability group and a second rock-soil layer equivalent permeability group through multiple micro-water tests, and calculating first mean error data of the first rock-soil layer equivalent permeability group and second mean error data of the second rock-soil layer equivalent permeability group respectively; When the first mean error data or the second mean error data is greater than a preset mean error threshold, determining the equivalent permeability coefficient of the third rock and soil layer at the preset target position of the reference observation hole; Obtaining a correction coefficient according to the difference between the equivalent permeability coefficient of the first rock and soil layer and the equivalent permeability coefficient of the second rock and soil layer, the equivalent permeability coefficient of the third rock and soil layer, and the corresponding observed water level depth to obtain a correction coefficient group; The plurality of groups of pre-processed hydrogeological data include: When the measured vibration frequency is less than the corresponding preset vibration frequency threshold, the corresponding initial hydrogeological data is corrected based on the corresponding correction coefficient; When the measured vibration frequency is greater than the corresponding preset vibration frequency threshold, based on the initial hydrogeological data corresponding to the measured vibration frequency, a text box for parameter input is sent to a preset user test terminal, and data preprocessing information of the user test terminal is obtained; and the corresponding initial hydrogeological data is preprocessed based on the data preprocessing information; A plurality of groups of pre-processed hydrogeological data are obtained.

2. A measurement method based on micro-water test in a borehole according to claim 1, characterized in that: Methods include: In the preset drilling test simulation model, formula (1) and formula (2) are used to solve the curve change function under the influence of positive thin wall effect: In formula (1), H D (τ) is the dimensionless form of water level change, τ represents dimensionless time, and t is time; i is a positive integer, V' i is the average value of the comprehensive coefficients of the multiple benchmark observation holes at the current observation water level depth, is the initial drilling test simulation model equation, which is used to characterize the water level change in dimensionless form, δ i Preset influence coefficients for different types of benchmark observation holes; In formula (2), α is the thin wall influence factor, γ represents the size of the well pipe storage effect, and the size of β reflects whether the difference in permeability between the two layers has a greater impact or the difference in the well pipe storage effect has a greater impact under this strength ratio; I0(x) is the first kind of modified Bessel function, k0(x) is the second kind of modified Bessel function, and a1, c1, a2, and c2 are constant coefficients.

3. A measurement method based on micro-water test in a borehole according to claim 2, characterized in that: The method of matching the preprocessed multiple groups of hydrogeological data with the standard curve corresponding to the standard curve data to identify the positive thin walls and thin wall influencing factors of the boreholes of the multiple reference observation holes includes: The actual test curve of the current test is drawn through the standard curve data, so that the actual test curve and the standard test curve are aligned on the ordinate axis, and then the actual test curve is translated along the abscissa axis to fit the actual test curve with the standard cone test curve, and the α value, β value and γ value corresponding to the fitted standard cone test curve are recorded. At the same time, any matching point is selected, and the corresponding coordinate values ​​[τ] and [t] are recorded to calculate the aquifer permeability K1, aquifer water storage rate S1, and positive thin wall permeability K of the current measured benchmark observation hole. B And the positive thin wall layer water storage rate S2.

4. A measurement method based on micro-water test in a borehole according to claim 3, characterized in that: The calculation method is as follows: the aquifer permeability coefficient K1, the aquifer water storage rate S1, the positive thin-wall permeability coefficient K of the currently measured reference observation hole B and positive thin-wall layer water storage rate S2, including: The aquifer water storage rate S1 is calculated based on formula (3): The water storage rate S2 of the positive thin wall layer is calculated based on formula (4): S2=β 2 *S1 / a (4) The permeability coefficient K1 of the aquifer is calculated based on formula (5): Based on formula (6), the permeability coefficient K of the positive thin wall layer is calculated B : K B =K1 / α (6) In the formula, r c is the radius of the borehole casing; B is the thickness of the confined aquifer; γ represents the size of the wellbore storage effect, τ represents the dimensionless time, and r w is the radius of the drilled tube.

5. A measurement system based on micro-water test in a borehole, characterized in that: The system includes: The observation hole formation and micro-water test module is used to drill holes in the target test section to form multiple reference observation holes based on the acquired geological data of the target test section; perform micro-water tests based on the multiple reference observation holes to obtain multiple groups of initial hydrogeological data of the rock and soil layers of the target test section, the corresponding observation water level depths and the corresponding measurement vibration frequencies; The correction coefficient acquisition and vibration frequency comparison module is used to obtain the correction coefficient based on the observed water level depth of each benchmark observation hole to obtain a correction coefficient group; compare the measured vibration frequencies of multiple groups of initial hydrogeological data with the corresponding preset vibration frequency thresholds to obtain vibration frequency comparison results; A data preprocessing module, used for sequentially preprocessing the multiple groups of the initial hydrogeological data according to the vibration frequency comparison result and the corresponding correction coefficient, to obtain the multiple groups of preprocessed hydrogeological data; A standard curve data acquisition module is used to derive standard curve data of the rock and soil layer of the corresponding reference observation hole under the influence of positive thin wall effect when a micro-water test is carried out in the borehole based on multiple groups of pre-processed hydrogeological data in a preset borehole test simulation model; The hydrogeological data acquisition module performs curve matching based on the preprocessed multiple groups of hydrogeological data and the standard curve corresponding to the standard curve data, identifies the positive thin walls and thin wall influencing factors of the boreholes of the multiple reference observation holes; updates the hydrogeological data of each reference observation hole, and obtains the hydrogeological parameters of the rock and soil layer of the target test section; The step of obtaining a plurality of groups of initial hydrogeological data of the rock and soil layers of the target test site, corresponding observed water level depths, and corresponding measured vibration frequencies includes: Dividing the observation water level at multiple depths in the same reference observation hole to obtain different observation water level depths based on the same reference observation hole, and dividing the rock and soil layer of the corresponding reference observation hole into multiple rock and soil observation layers according to the different observation water level depths; Based on the rock and soil observation stratification at different observation water levels of the same reference observation hole, a micro-water test is performed through a micro-water test device to obtain a plurality of groups of initial hydrogeological data at different observation water level depths of the rock and soil layers of the target test section; a frequency instrument for obtaining the vibration frequency signal of the micro-water test device is arranged on the micro-water test device; the measured vibration frequency of the micro-water test device before the water head rise test and the water head fall test is obtained through the frequency instrument; The plurality of reference observation holes include reference test holes and calibration reference holes; the correction coefficient group is obtained, including: Based on the observed water level depth in the reference observation hole, the rock and soil layer thickness and single-layer permeability coefficient of the corresponding rock and soil observation layer are obtained, and based on the rock and soil layer thickness and single-layer permeability coefficient, the equivalent permeability coefficient of the rock and soil layer at different observed water level depths of the reference test hole is obtained; the equivalent permeability coefficient of the rock and soil layer includes the equivalent permeability coefficient of the first rock and soil layer and the equivalent permeability coefficient of the second rock and soil layer of the reference test hole; Obtaining a first rock-soil layer equivalent permeability group and a second rock-soil layer equivalent permeability group through multiple micro-water tests, and calculating first mean error data of the first rock-soil layer equivalent permeability group and second mean error data of the second rock-soil layer equivalent permeability group respectively; When the first mean error data or the second mean error data is greater than a preset mean error threshold, determining the equivalent permeability coefficient of the third rock and soil layer at the preset target position of the reference observation hole; Obtaining a correction coefficient according to the difference between the equivalent permeability coefficient of the first rock and soil layer and the equivalent permeability coefficient of the second rock and soil layer, the equivalent permeability coefficient of the third rock and soil layer, and the corresponding observed water level depth to obtain a correction coefficient group; The plurality of groups of pre-processed hydrogeological data include: When the measured vibration frequency is less than the corresponding preset vibration frequency threshold, the corresponding initial hydrogeological data is corrected based on the corresponding correction coefficient; When the measured vibration frequency is greater than the corresponding preset vibration frequency threshold, based on the initial hydrogeological data corresponding to the measured vibration frequency, a text box for parameter input is sent to a preset user test terminal, and data preprocessing information of the user test terminal is obtained; and the corresponding initial hydrogeological data is preprocessed based on the data preprocessing information; A plurality of groups of pre-processed hydrogeological data are obtained.

6. A measurement system based on micro-water test in a borehole according to claim 5, characterized in that: It also includes a micro-water test device for conducting a micro-water test, the micro-water test device includes a metal oscillator, the metal oscillator includes a top column and a bottom column for connecting a traction rope, the top end of the bottom column is detachably connected to the top column, and the tail end of the bottom column is cone-shaped; a plurality of cylinders that are connected end to end and detachably connected are also connected between the top column and the bottom column.

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