Method for determining the anti-swelling rate of clay stabilizers

Abstract

The application discloses a method for determining the anti-swelling rate of a clay stabilizer, comprising the following steps: obtaining the first density of a clay stabilizer solution; centrifuging the first preset amount of the clay stabilizer solution by adding the second preset amount of bentonite into the first preset amount of the clay stabilizer solution in sequence according to a preset number, and obtaining the first supernatant; obtaining the first mass of the first supernatant; determining the first swelling volume of the bentonite in the clay stabilizer solution according to the first mass and the first density of the clay stabilizer solution; centrifuging the first preset amount of distilled water by adding the second preset amount of bentonite into the first preset amount of the distilled water in sequence according to a preset number, and obtaining the second supernatant; obtaining the second mass of the second supernatant; determining the second swelling volume of the bentonite in the distilled water according to the second mass and the second density of the distilled water; and calculating the anti-swelling rate of the clay stabilizer by using a first formula according to the first swelling volume and the second swelling volume. The accuracy of the anti-swelling rate is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of reservoir reconstruction operation, and particularly relates to a method for determining anti-swelling rate of clay stabilizer. BACKGROUND

[0002] In the related art, the anti-swelling rate of the clay stabilizer is usually measured by using a centrifugal method to evaluate the clay stabilizer. In the process of testing the anti-swelling rate of the clay stabilizer by using the centrifugal method, the upper end surface value and the lower end surface value of the surface of the sodium-based bentonite after swelling are read, and the average value of the upper and lower end surface values is taken as the volume of the sodium-based bentonite after swelling. However, since the surface of the sodium-based bentonite in the centrifugal tube after centrifugation is not a flat section, the reading method will affect the accuracy of the experimental results, and the reading error is large due to the different visual angles of different people during reading. Further, the volume of the sodium-based bentonite used in the formula for testing the anti-swelling rate of the clay stabilizer is the volume of the sodium-based bentonite in kerosene, however, there are still certain pores between the clay particles after the clay is compacted by the centrifugal machine in kerosene. Therefore, the error of the anti-swelling rate calculated by using the method is large. SUMMARY

[0003] Therefore, the present application provides a method for determining the anti-swelling rate of a clay stabilizer.

[0004] According to one aspect of the present application, a method for determining the anti-swelling rate of a clay stabilizer is provided, comprising:

[0005] adding the clay stabilizer into distilled water to obtain a clay stabilizer solution;

[0006] obtaining the first density of the clay stabilizer solution;

[0007] adding the second preset amount of bentonite into the first preset amount of the clay stabilizer solution in sequence according to the preset number for centrifugal separation to obtain a first supernatant;

[0008] obtaining the first mass of the first supernatant;

[0009] determining the first swelling volume of the bentonite in the clay stabilizer solution according to the first mass and the first density of the clay stabilizer solution;

[0010] adding the second preset amount of bentonite into the first preset amount of distilled water in sequence according to the preset number for centrifugal separation to obtain a second supernatant;

[0011] obtaining the second mass of the second supernatant;

[0012] determining the second swelling volume of the bentonite in the distilled water according to the second mass and the second density of the distilled water;

[0013] According to the first expansion volume and the second expansion volume, a swelling prevention rate of the clay stabilizer is calculated by using a first formula;

[0014] The first formula is:

[0015]

[0016] Wherein, the B1 is the swelling prevention rate of the clay stabilizer, the V3 is the second expansion volume of the bentonite in distilled water, and the V4 is the first expansion volume of the bentonite in the clay stabilizer solution.

[0017] Optionally, before the step of sequentially adding the second preset amount of the bentonite into the first preset amount of the clay stabilizer solution for centrifugal separation according to the preset number of times to obtain the first supernatant, the method further comprises:

[0018] Injecting the first preset amount of the clay stabilizer solution into the centrifugal tube;

[0019] Sequentially injecting the second preset amount of the bentonite into the centrifugal tube according to the preset number of times;

[0020] According to the preset direction, the piston device assembled on the centrifugal tube is pushed to mix the bentonite and the clay stabilizer solution;

[0021] The centrifugal tube is loaded into the centrifuge, and the centrifuge is controlled to perform centrifugal separation at the preset centrifugal speed for the preset centrifugal time to obtain the first supernatant.

[0022] Optionally, before the step of loading the centrifugal tube into the centrifuge, controlling the centrifuge to perform centrifugal separation at the preset centrifugal speed for the preset centrifugal time to obtain the first supernatant, the method further comprises:

[0023] According to the centrifugal radius of the centrifugal tube and the preset relative centrifugal force of the centrifuge, a preset centrifugal speed is calculated by using a second formula;

[0024] The second formula is:

[0025]

[0026] Wherein, the F is the preset relative centrifugal force, the n is the preset centrifugal speed, the r is the centrifugal radius, and the g is the acceleration of gravity.

[0027] Optionally, before the step of sequentially adding the second preset amount of the bentonite into the first preset amount of the clay stabilizer solution for centrifugal separation according to the preset number of times to obtain the first supernatant, the method further comprises:

[0028] Obtaining a plurality of bentonite samples;

[0029] Among the plurality of bentonite samples, the bentonite sample satisfying the preset condition is determined.

[0030] Optionally, the step of obtaining the first mass of the first supernatant specifically comprises:

[0031] obtaining a third mass of the water-absorbing cotton;

[0032] using the water-absorbing cotton to absorb the first supernatant, and determining a fourth mass of the water-absorbing cotton after absorbing the first supernatant;

[0033] determining the first mass of the first supernatant according to the third mass and the fourth mass.

[0034] Optionally, the step of determining the first swelling volume of the bentonite in the clay stabilizer solution according to the first mass and the first density of the clay stabilizer solution specifically comprises:

[0035] calculating the first swelling volume according to the first mass and the first density by using a third formula;

[0036] The third formula is:

[0037] V4 = 10 - W / p,

[0038] wherein, V4 is the first swelling volume, W is the first mass of the first supernatant, and p is the first density of the clay stabilizer solution.

[0039] Optionally, the centrifugal radius of the centrifuge tube is between 10 cm and 15 cm.

[0040] Optionally, the preset centrifugal time is 15 min.

[0041] Optionally, the preset relative centrifugal force of the centrifuge is greater than or equal to 250.

[0042] Optionally, the preset condition is that the swelling volume multiple of the bentonite in distilled water is between 5 and 8, and the tangent slope of the functional relationship between the swelling volume of the bentonite and the placement time is less than 0.26.

[0043] According to the mass of the supernatant liquid separated by centrifugation of the bentonite mixed with the clay stabilizer solution and the density of the clay stabilizer solution, the swelling volume of the bentonite in the clay stabilizer solution is calculated. Meanwhile, according to the mass of the supernatant liquid separated by centrifugation of the bentonite mixed with distilled water and the density of the distilled water, the swelling volume of the bentonite in the distilled water is calculated. Then, according to the calculated swelling volumes, the anti-swelling rate of the clay stabilizer is calculated by using an anti-swelling rate calculation model, so as to evaluate the clay stabilizer subsequently. Compared with the prior art, in the process of testing the anti-swelling rate of the clay stabilizer by using the centrifugal method, the numerical values of the upper and lower end faces of the bentonite after swelling are read by using the visual reading method, and the average value of the readings of the upper and lower end faces is taken as the volume of the bentonite after swelling. Meanwhile, the volumes of the bentonite in kerosene and distilled water are used to calculate the anti-swelling rate of the clay stabilizer. The method for determining the anti-swelling rate of the clay stabilizer provided by the present application, on the one hand, uses the density-weighting method to calculate the volume of the bentonite after swelling instead of the visual reading method, so as to effectively reduce the reading error caused by the different visual angles of the eyes in the reading process of different people. On the other hand, by improving the mixing method of the drugs and constructing a new anti-swelling rate calculation model, the swelling volume of the bentonite in kerosene does not need to be measured, and only the swelling volumes of the bentonite in the clay stabilizer solution and distilled water need to be measured. Therefore, the method is simple in operation, reduces the error of experimental results, and effectively improves the accuracy of the calculation of the anti-swelling rate of the clay stabilizer, so as to provide protection for the subsequent screening of the best clay stabilizer, the optimization of the dosage of the drug, and the reduction of the damage of the imported operation fluid to the reservoir.

[0044] The above description is only a summary of the technical solutions of the present application. In order to enable the technical means of the present application to be more clearly understood, the present application can be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0045] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0046] Figure 1 A flowchart of a method for determining the anti-swelling rate of a clay stabilizer provided by an embodiment of the present application is shown.

[0047] Figure 2 A curve graph of the swelling volume of bentonite changing with the placement time is shown. DETAILED DESCRIPTION

[0048] Hereinafter, the present application will be described in detail with reference to the accompanying drawings and embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0049] A method for determining the anti-swelling rate of a clay stabilizer is provided in the present embodiment, as shown in the following formula (I): Figure 1 The method comprises the following steps:

[0050] In step 102, a clay stabilizer is added into distilled water to obtain a clay stabilizer solution.

[0051] In step 104, the first density of the clay stabilizer solution is obtained.

[0052] In step 106, a second preset amount of bentonite is sequentially added into a first preset amount of the clay stabilizer solution for centrifugal separation according to a preset number of times to obtain a first supernatant.

[0053] In step 108, the first mass of the first supernatant is obtained.

[0054] In step 110, the first swelling volume of the bentonite in the clay stabilizer solution is determined according to the first mass and the first density of the clay stabilizer solution.

[0055] In step 112, a second preset amount of bentonite is sequentially added into a first preset amount of distilled water for centrifugal separation according to a preset number of times to obtain a second supernatant.

[0056] In step 114, the second mass of the second supernatant is obtained.

[0057] In step 116, the second swelling volume of the bentonite in the distilled water is determined according to the second mass and the second density of the distilled water.

[0058] In step 118, the anti-swelling rate of the clay stabilizer is calculated by using the first formula according to the first swelling volume and the second swelling volume.

[0059] The embodiments of the present application can be applied to experimental analysis and evaluation of adding agents in well fluid to inhibit clay swelling. Specifically, a clay stabilizer is added into distilled water to configure a clay stabilizer solution. After the clay stabilizer solution is configured, the density of the clay stabilizer solution, i.e., the first density, is measured. Then, a second preset amount of bentonite is sequentially added into a first preset amount of the clay stabilizer solution according to a preset number of times, and the two are fully mixed and uniformly separated by centrifugal separation to obtain a first supernatant. Further, the mass of the first supernatant, i.e., the first mass, is measured, and the first swelling volume of the bentonite in the clay stabilizer solution after swelling is calculated according to the measured mass of the first supernatant and the density of the clay stabilizer solution.

[0060] Further, after obtaining the first swelling volume of the bentonite in the clay stabilizer solution, a repeated experiment is performed using distilled water instead of the clay stabilizer solution to obtain a second swelling volume of the bentonite in the distilled water. Specifically, the same dosage as the clay stabilizer solution, i.e., a first preset amount of distilled water, is obtained. According to the preset number of times, a second preset amount of bentonite is sequentially added to the distilled water, and after the two are fully mixed and uniformly mixed, centrifugal separation is performed to obtain a second supernatant. Further, the mass of the second supernatant, i.e., a second mass, is measured, and according to the measured mass of the second supernatant and the second density of the distilled water, the second swelling volume of the bentonite after swelling in the distilled water is calculated.

[0061] Further, according to the calculated swelling volume of the bentonite after swelling in the clay stabilizer solution and the calculated swelling volume of the bentonite after swelling in the distilled water, a first formula, i.e., an anti-swelling rate calculation model, is used to calculate the anti-swelling rate of the clay stabilizer.

[0062] Specifically, the first formula is:

[0063]

[0064] wherein B1 is the anti-swelling rate of the clay stabilizer, V3 is the second swelling volume of the bentonite in the distilled water, and V4 is the first swelling volume of the bentonite in the clay stabilizer solution.

[0065] According to the quality of the supernatant separated by centrifugation of the bentonite and the clay stabilizer solution and the density of the clay stabilizer solution, the swelling volume of the bentonite in the clay stabilizer solution is calculated. At the same time, according to the quality of the supernatant separated by centrifugation of the bentonite and distilled water and the density of the distilled water, the swelling volume of the bentonite in the distilled water is calculated. Then, according to the calculated swelling volume, the anti-swelling rate of the clay stabilizer is calculated by using the anti-swelling rate calculation model for subsequent evaluation of the clay stabilizer. Compared with the prior art, in the process of testing the anti-swelling rate of the clay stabilizer by using the centrifugal method, the numerical values of the upper and lower end faces of the surface of the bentonite after swelling are read by visual reading method, and the average of the readings of the upper and lower end faces is taken as the volume of the bentonite after swelling. At the same time, the volume of the bentonite in kerosene and distilled water is used to calculate the anti-swelling rate of the clay stabilizer. The method for determining the anti-swelling rate of the clay stabilizer provided in the present application, on the one hand, uses the density-weighting method to calculate the volume of the bentonite after swelling instead of the visual reading method, effectively reducing the reading error caused by the different visual angles of the eyes during reading by different people. On the other hand, by improving the mixing method of the drugs and constructing a new anti-swelling rate calculation model, it is not necessary to measure the swelling volume of the bentonite in kerosene, but only to measure the swelling volume of the bentonite in the clay stabilizer solution and distilled water, which is simple in operation, reduces the experimental result error, and effectively improves the accuracy of the calculation of the anti-swelling rate of the clay stabilizer, providing protection for the subsequent selection of the best clay stabilizer, the optimization of the dosage of the drug, and the reduction of the damage of the imported operation fluid to the reservoir.

[0066] It should be noted that the dosage of the distilled water and the clay stabilizer required for configuring the clay stabilizer solution can be selected according to the measurement experiment requirements, which is not specifically limited herein.

[0067] Optionally, the first preset amount can be set to 10 mL; the second preset amount can be set to 0.5 g; and the preset number of times can be set to 4 to 6 times.

[0068] Optionally, the bentonite can be sodium-based bentonite.

[0069] In the embodiments of the present application, step 106 can specifically include: injecting a first preset amount of clay stabilizer solution into the centrifuge tube; injecting a second preset amount of bentonite into the centrifuge tube in turn according to a preset number of times; pushing the piston device assembled on the centrifuge tube in a preset direction to mix the bentonite and the clay stabilizer solution; and loading the centrifuge tube into a centrifuge, and controlling the centrifuge to perform centrifugal separation at a preset centrifugal speed for a preset centrifugal time to obtain a first supernatant.

[0070] In this embodiment, the determination of the swelling volume generally uses a centrifuge. After the clay stabilizer solution is prepared, a first preset amount of the prepared clay stabilizer solution is added to the centrifuge tube, and a second preset amount of the bentonite is sequentially added to the centrifuge tube according to a preset number of times. After the bentonite is added, the piston device is assembled on the centrifuge tube and is pushed in a preset direction to make the bentonite remaining on the wall fully contact and mix with the solution. After the bentonite is completely settled, the piston device is pulled out. The piston device is used to ensure that the two are uniformly mixed to reduce experimental errors caused by the bentonite adhering to the wall. Further, after the bentonite is uniformly mixed with the clay stabilizer solution, the centrifuge tube is loaded into the centrifuge, and the centrifuge is controlled to operate at a preset centrifugal speed for a preset centrifugal time to centrifuge the mixed solution in the centrifuge tube, thereby obtaining a first supernatant.

[0071] It can be understood that, in the process of repeating the experiment using distilled water instead of the clay stabilizer solution, a first preset amount of the distilled water is added to the centrifuge tube, and a second preset amount of the bentonite is sequentially added to the centrifuge tube according to a preset number of times. After the bentonite is added, the piston device is assembled on the centrifuge tube and is pushed downward to make the bentonite remaining on the wall fully contact and mix with the solution. After the bentonite is completely settled, the piston device is pulled out. Further, after the bentonite is uniformly mixed with the distilled water, the centrifuge tube is loaded into the centrifuge, and the centrifuge is controlled to operate at a preset centrifugal speed for a preset centrifugal time to centrifuge the mixed solution in the centrifuge tube, thereby obtaining a second supernatant.

[0072] In the embodiments of the present application, the preset centrifugal time is 15 min. By setting the preset time, the centrifuge is controlled to centrifuge for the preset centrifugal time to ensure the accumulation effect of the bentonite in the centrifuge tube, thereby ensuring the accuracy of the experimental results.

[0073] In the embodiments of the present application, before the centrifuge tube is loaded into the centrifuge, the centrifuge is controlled to centrifuge at a preset centrifugal speed for a preset centrifugal time to obtain the first supernatant, the method further includes: according to the centrifugal radius of the centrifuge tube and the preset relative centrifugal force of the centrifuge, a second formula is used to calculate the preset centrifugal speed.

[0074] The second formula is:

[0075]

[0076] In the above formula, F is the preset relative centrifugal force, n is the preset centrifugal speed, r is the centrifugal radius, and g is the acceleration of gravity.

[0077] In this embodiment, according to the centrifugal radius and the relative centrifugal force of the centrifugal tube, the centrifugal speed of the centrifugal machine is calculated by the second formula, and then the centrifugal machine is controlled to perform centrifugal separation at the calculated centrifugal speed, so as to ensure the accuracy of the experimental results.

[0078] Specifically, the acceleration of gravity is 980 cm / s 2 .

[0079] In the embodiment of the present application, the centrifugal radius of the centrifugal tube is optionally set to be between 10 cm and 15 cm. The preset relative centrifugal force of the centrifugal separation is greater than or equal to 250. By setting the centrifugal radius and the relative centrifugal force, the centrifugal speed of the centrifugal machine is calculated by the second formula, and then the centrifugal machine is controlled to perform centrifugal separation according to the calculated centrifugal speed.

[0080] In a specific embodiment, when the preset relative centrifugal force of the centrifugal machine is 250, the preset centrifugal speed is calculated to be 1500 r / min according to the formula. After the clay stabilizer solution is prepared, 10 mL of the prepared clay stabilizer solution is added to the centrifugal tube, and then 0.5 g of bentonite is added to the centrifugal tube in 4 to 6 times, and a stirring device is used to ensure that the two are uniformly mixed. After standing at room temperature for 2 hours, the centrifugal machine is loaded, and centrifugal separation is performed at a centrifugal speed of 1500 r / min for 15 min to obtain the first supernatant.

[0081] In the embodiment of the present application, before step 106, the method can further include: obtaining a plurality of bentonite samples; and determining bentonite samples that meet a preset condition from the plurality of bentonite samples.

[0082] In this embodiment, different bentonites have different anti-swelling rates in the centrifugal experiment of mixing with the clay stabilizer and distilled water. In order to ensure the accuracy of the measurement results, a plurality of bentonite samples are obtained, and through pre-experiment, the bentonite samples that meet the preset condition are screened from the plurality of bentonite samples for subsequent measurement of the anti-swelling rate of the clay stabilizer, so that the quality of the bentonite used in the subsequent experimental measurement process can meet the experimental requirements, and the quality of the bentonite will not affect the final experimental data, effectively improving the accuracy of the measured anti-swelling rate of the clay stabilizer.

[0083] In the embodiment of the present application, the preset condition is that the swelling volume multiple of the bentonite in the distilled water is between 5 and 8, and the slope of the tangent line of the function relationship between the swelling volume of the bentonite and the standing time is less than 0.26. Through pre-experiment, the bentonite samples that meet the preset condition are screened from the plurality of bentonite samples, so that the swelling volume multiple of the screened bentonite in the distilled water is between 5 and 8. Further, as Figure 2As shown, it is a curve diagram of the swelling volume of bentonite changing with the standing time, specifically, the "curve" in the diagram is the curve of the swelling volume of bentonite changing with the standing time, and the slope of the tangent line set for the function relationship between the swelling volume of bentonite and the standing time is less than 0.26, that is, the tangent angle θ is less than 15°, so as to ensure the accuracy of the anti-swelling rate of the clay stabilizer measured subsequently.

[0084] In the embodiment of the present application, step 108 can specifically include: acquiring the third mass of the water-absorbing cotton; determining the fourth mass of the water-absorbing cotton after the water-absorbing cotton absorbs the first upper clear liquid; and determining the first mass of the first upper clear liquid according to the third mass and the fourth mass.

[0085] In this embodiment, the mass of the water-absorbing cotton wrapped with gauze, i.e., the third mass, is collected after the mixed solution of bentonite and clay stabilizer solution is centrifuged by the centrifuge. Then, the water-absorbing cotton absorbs the first upper clear liquid, and the mass of the water-absorbing cotton after absorbing the first upper clear liquid, i.e., the fourth mass, is collected. The first mass of the first upper clear liquid is obtained according to the mass difference of the water-absorbing cotton before and after absorbing water.

[0086] It can be understood that, in the process of repeating the experiment by using distilled water instead of the clay stabilizer solution, the mass of the water-absorbing cotton wrapped with gauze is collected after the mixed solution of bentonite and distilled water is centrifuged by the centrifuge. Then, the water-absorbing cotton absorbs the second upper clear liquid, and the mass of the water-absorbing cotton after absorbing the second upper clear liquid is collected. The second mass of the second upper clear liquid is obtained according to the mass difference of the water-absorbing cotton before and after absorbing water.

[0087] In the embodiment of the present application, step 110 can specifically include: calculating the first swelling volume of bentonite according to the first mass and the first density by using a third formula.

[0088] The third formula is:

[0089] V4=10-W / ρ,

[0090] wherein V4 is the first swelling volume, W is the first mass of the first upper clear liquid, and ρ is the first density of the clay stabilizer solution.

[0091] In this embodiment, the first supernatant after centrifugation is sucked by the water-absorbing cotton, the mass of the first supernatant is calculated, and then according to the mass of the obtained supernatant and the density of the clay stabilizer solution, the first swelling volume of the bentonite after swelling in the clay stabilizer solution is calculated by using the third formula. The density-weighing method is used to obtain the swelling volume of the bentonite in the experiment, which reduces the human error compared with the visual reading method in the prior art, effectively improves the accuracy of the test data, and provides protection for screening the best clay stabilizer, optimizing the dosage of the agent, and reducing the damage of the reservoir by the well operation fluid.

[0092] It can be understood that in the process of repeating the experiment by using distilled water instead of the clay stabilizer solution, the second supernatant after centrifugation is sucked by the water-absorbing cotton, the mass of the second supernatant is calculated, and then the second swelling volume V3 of the bentonite after swelling in the distilled water can be calculated by using the formula V3 = 10 - W / ρ. It should be noted that at this time, W in the formula is the second mass of the second supernatant; and ρ is the density of the distilled water.

[0093] Those skilled in the art can understand that the modules or processes in the drawings are not necessarily required for implementing the present application. Those skilled in the art can understand that the modules in the device in the implementation scenario can be distributed in the device in the implementation scenario according to the description of the implementation scenario, or can be changed and located in one or more devices different from the implementation scenario. The modules of the above implementation scenario can be combined into one module, or can be further split into multiple sub-modules.

[0094] The above application number is only for description, and does not represent the advantages and disadvantages of the implementation scenario. The above disclosure is only a few specific implementation scenarios of the present application, but the present application is not limited thereto, and any changes that can be thought of by those skilled in the art should fall within the protection scope of the present application.

Claims

1. A method for determining the anti-swelling rate of a clay stabilizer, characterized in that, include: Clay stabilizer is added to distilled water to obtain a clay stabilizer solution; Obtain the first density of the clay stabilizer solution; According to a preset number of times, a second preset amount of bentonite is added sequentially to a first preset amount of clay stabilizer solution and centrifuged to obtain a first supernatant. Obtain the first mass of the first supernatant; The first expansion volume of the bentonite in the clay stabilizer solution is determined based on the first mass and the first density of the clay stabilizer solution. According to the preset number of times, the second preset amount of bentonite is added to the first preset amount of distilled water in sequence and centrifuged to obtain the second supernatant. Obtain the second mass of the second supernatant; The second expansion volume of the bentonite in the distilled water is determined based on the second mass and the second density of the distilled water; Based on the first expansion volume and the second expansion volume, the anti-swelling rate of the clay stabilizer is calculated using the first formula. The first formula is: Wherein, B1 is the anti-swelling rate of the clay stabilizer, V3 is the second swelling volume of the bentonite in the distilled water, and V4 is the first swelling volume of the bentonite in the clay stabilizer solution.

2. The method according to claim 1, characterized in that, The step of adding a second preset amount of bentonite sequentially to a first preset amount of clay stabilizer solution according to a preset number of times, and centrifuging to obtain a first supernatant, specifically includes: Inject the first preset amount of the clay stabilizer solution into the centrifuge tube; The second preset amount of bentonite is injected into the centrifuge tube sequentially according to the preset number of times; The piston device mounted on the centrifuge tube is pushed in a preset direction to mix the bentonite with the clay stabilizer solution. The centrifuge tubes are loaded into a centrifuge, and the centrifuge is controlled to perform centrifugation separation at a preset speed for a preset centrifugation time to obtain the first supernatant.

3. The method according to claim 2, characterized in that, Before loading the centrifuge tubes into the centrifuge and centrifuging at a preset speed for a preset centrifugation time to obtain the first supernatant, the method further includes: The preset centrifugal speed is calculated using the second formula based on the centrifugal radius of the centrifuge tube and the preset relative centrifugal force of the centrifuge. The second formula is: Wherein, F is the preset relative centrifugal force, n is the preset centrifugal speed, r is the centrifugal radius, and g is the gravitational acceleration.

4. The method according to claim 1, characterized in that, Before centrifuging to obtain the first supernatant by sequentially adding a second preset amount of bentonite to a first preset amount of clay stabilizer solution according to a preset number of times and centrifuging, the method further includes: Multiple bentonite samples were obtained; Among the plurality of bentonite samples, bentonite that meets the preset conditions is identified.

5. The method according to claim 1, characterized in that, The step of obtaining the first mass of the first supernatant specifically includes: To obtain the third mass of the absorbent cotton; The absorbent cotton is used to absorb the first upper clear liquid, and the fourth mass of the absorbent cotton after absorbing the first upper clear liquid is determined. The first mass of the first supernatant is determined based on the third mass and the fourth mass.

6. The method according to claim 1, characterized in that, The step of determining the first expansion volume of the bentonite in the clay stabilizer solution based on the first mass and the first density of the clay stabilizer solution specifically includes: The first expansion volume is calculated using the third formula based on the first mass and the first density. The third formula is: V4 = 10 - W / ρ, Wherein, V4 is the first expansion volume, W is the first mass of the first supernatant, and ρ is the first density of the clay stabilizer solution.

7. The method according to any one of claims 1 to 6, characterized in that, The centrifugation radius of centrifuge tubes is between 10cm and 15cm.

8. The method according to any one of claims 1 to 6, characterized in that, The preset centrifugation time is 15 minutes.

9. The method according to any one of claims 1 to 6, characterized in that, The centrifuge's preset relative centrifugal force is greater than or equal to 250.

10. The method according to any one of claims 1 to 6, characterized in that, The preset conditions are that the expansion volume ratio of the bentonite in the distilled water is between 5 and 8, and the slope of the tangent line of the functional relationship between the expansion volume of the bentonite and the placement time is less than 0.26.

Images