Sludge profile control device and injection method thereof

Abstract

The invention belongs to the technical field of oil exploitation sludge treatment, and provides a sludge profile control device which comprises a coarse separation sludge tank used for diluting sludge generated in the oil exploitation process of a water injection well; the fine sludge separation tank is used for screening the diluted sludge in the coarse sludge separation tank; the profile control and liquid preparation mechanism is used for stirring the screened sludge in the subdivision sludge tank, and mixing the sludge with a profile control agent liquid to form a sludge profile control agent; the sludge profile control agent automatically flows into the well bottom of the water injection well through the self-absorption capacity and gravity of the water injection well, the sludge serves as the main raw material of the profile control agent used in the profile control technology in the oil exploitation process, the emulsified suspending agent capable of meeting the formation profile control requirement is formed after pretreatment and processing, the profile control technology requirement can be met, and the profile control efficiency is improved. The dosage of polymers in the profile control process is reduced, and the profile control cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of petroleum exploitation sludge treatment, and in particular relates to a sludge profile control device and an injection method thereof. Background Art

[0002] Oilfield produced sludge is a byproduct of oilfield production. It is crude oil or finished oil mixed with soil or other impurities. The oil in it cannot be directly recovered and is one of the main pollutants in the petrochemical industry. It is inevitably produced during the process of oil extraction, processing, storage and transportation, such as the ground oil pollution produced by drilling; the bottom mud of oil storage tanks, oil separators, oil separators, and sediments in oily sewage pools during oilfield gathering and transportation; precipitation formed by water purifiers added during produced water treatment. These sludges are usually brown-black viscous solids and are in the form of stable suspended emulsions in water. Its composition is complex and rich in petroleum hydrocarbons. If it is discharged directly without treatment or treatment that does not meet the standards, especially for some sludges with high oil content, it will not only cause serious harm to the surrounding environment, but also cause serious waste of resources.

[0003] Currently, there are several commonly used methods for treating produced sludge: incineration, high-temperature heat treatment, landfill, etc.

[0004] Incineration technology is the most commonly used harmless treatment technology. However, the incineration method cannot recover the crude oil in the sludge, and the incineration process will produce a large amount of air pollutants such as sulfide and nitrogen oxides. The state has now stipulated that sludge with an oil content of more than 5% cannot be directly incinerated.

[0005] High temperature treatment methods mainly include thermal desorption and coking treatment. Thermal desorption is to preheat the sludge to a certain temperature, then enter the separation tower for flash evaporation, and finally recover the oil substances, which can be used for the recovery of light oil with low molecular weight. Coking treatment is for sludge rich in mineral oil, using high temperature conditions to crack heavy oil, and the temperature is generally controlled at 350℃ to 400℃. High temperature treatment technology meets the requirements of my country's clean production, but the investment is high.

[0006] Landfill treatment technology is a relatively simple method for sludge treatment, which is often landfilled directly or solidified before landfilling. At present, most domestic oil fields use direct landfilling to treat sludge, but this method occupies a large amount of land and is prone to soil and groundwater pollution. Summary of the invention

[0007] The invention discloses a sludge profile control device and an injection method thereof, which are intended to solve the defective problems existing in sludge treatment by incineration method, high temperature heat treatment or landfill method in petroleum exploitation.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0009] On the one hand, the present application provides a sludge profile control device including: a coarse sludge tank, which is connected to an injection well through a first pipeline, and is used to dilute the sludge generated by the injection well during oil extraction; a fine sludge tank, which is connected to the coarse sludge tank through a second pipeline, and is used to screen the diluted sludge in the coarse sludge tank; a profile control liquid preparation mechanism, which is arranged on one side of the fine sludge tank, and is used to stir the sludge after screening in the fine sludge tank, and prepare it with a profile control agent liquid to form a sludge profile control agent; an injection well, and the sludge profile control agent enters the bottom of the injection well through the self-priming ability of the injection well and gravity flow.

[0010] Optionally, the profile adjustment and liquid preparation mechanism includes: a profile adjustment and liquid preparation tank and a stirring device, the profile adjustment and liquid preparation tank is connected to the subdivided sludge tank and the water injection well through a third pipe and a fourth pipe respectively, the stirring device is arranged inside the profile adjustment and liquid preparation tank, and the stirring device is used to stir the sludge that flows into the profile adjustment and liquid preparation tank after screening in the subdivided sludge tank.

[0011] Optionally, the profile control and liquid preparation mechanism further includes: a reduction box, which is arranged on one side of the profile control and liquid preparation pool, and is electrically connected to the stirring device, and is used to adjust the stirring speed of the stirring device.

[0012] Optionally, the first pipeline, the second pipeline, the third pipeline and the fourth pipeline are all steel pipes, and the installation angle of the steel pipes is 30° to 45°.

[0013] Optionally, the stirring device includes a stirrer and a stirring blade, and the outlet of the profile control liquid preparation pool is arranged closest to the stirring blade.

[0014] Optionally, the installation heights of the coarse sludge tank, the fine sludge tank and the profile control and liquid preparation tank are in a decreasing trend, and the sludge transportation is completed through the installation height difference between the coarse sludge tank, the fine sludge tank and the profile control and liquid preparation tank.

[0015] Optionally, a valve is installed on the first pipeline, and the valve is located at the entrance of the coarse sludge tank, and the sludge generated in the injection well is input into the coarse sludge tank by opening and closing the valve.

[0016] In a second aspect, the present application provides an injection method for a sludge profile control device, the injection method comprising:

[0017] S1. The sludge generated in the water injection well during oil extraction is input into the coarse sludge pool through the first pipeline to dilute the coarse sludge;

[0018] S2. The sludge diluted from the coarse sludge tank automatically flows into the fine sludge tank for fine processing by utilizing the high and low potential energy difference of the device;

[0019] S3. The sludge sorted by the subdivided sludge pool automatically flows into the profile control liquid preparation mechanism again by utilizing the high and low potential energy difference of the device, and the profile control liquid preparation mechanism is used to stir the sludge after the screening treatment in the subdivided sludge pool and prepare it with the profile control agent liquid to form a sludge profile control agent;

[0020] S4. The sludge profile control agent enters the bottom of the water injection well through the self-priming capacity of the water injection well and gravity flow, completing the recycling of the sludge.

[0021] Optionally, the sludge sorted by the subdivided sludge pool automatically flows into the profile control liquid preparation mechanism again by utilizing the high and low potential energy difference of the device, and the profile control liquid preparation mechanism is used to stir the sludge after screening in the subdivided sludge pool, and prepare it with the profile control agent liquid to form the sludge profile control agent, including:

[0022] S31. The sludge sorted by the subdivided sludge pool is input into the profile adjustment liquid preparation pool through the third pipeline;

[0023] S32. The stirring device provided in the profile adjustment liquid preparation tank stirs the sludge in the profile adjustment liquid preparation tank;

[0024] S33. During the stirring process, the stirring device is electrically connected to the stirring device through the reduction box, thereby adjusting the stirring speed of the stirring device.

[0025] The beneficial effects of the present invention include:

[0026] 1. The main technical means of the present invention is to combine the profile control process of oil field water injection wells, utilize the characteristics of the sludge itself generated during the oil field exploitation process, and develop a sludge profile control device. The sludge is diluted, screened, and stirred on the ground through the device to prepare a sludge profile control agent suitable for water injection wells, so as to achieve the strength of sludge particles blocking the high permeability layer. The plugging agent is injected into the high permeability layer in the formation through the water injection well, forcing the injected water to flow toward the low permeability layer, thereby adjusting the water absorption profile of the water injection well, improving the heterogeneity of the underground reservoir, and ultimately achieving the purpose of improving the crude oil recovery rate.

[0027] 2. The present invention uses sludge as the main raw material of the profile control agent used in the profile control process during oil extraction. After pretreatment and processing, it forms an emulsified suspension that can meet the requirements of formation profile control. It can not only meet the requirements of the profile control process, reduce the amount of polymer used in the profile control process, and reduce the cost of profile control, but also can process the sludge as a resource and eliminate environmental pollution.

[0028] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or be understood by implementing the embodiments of the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 This is a schematic diagram of the overall structure of a sludge profile control device in this application.

[0031] Figure 2 A schematic flow chart of the steps of an injection method of a sludge profile control device according to the present application.

[0032] Description of reference numerals:

[0033] 1. Coarse sludge tank; 2. Fine sludge tank; 3. Profile adjustment and liquid preparation tank; 4. Stirring device; 5. Speed ​​reducer; 6. Water injection well. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0036] Example 1

[0037] like Figure 1 The present embodiment provides a sludge profile control device, comprising:

[0038] A coarse sludge tank 1, wherein the coarse sludge tank 1 is connected to the water injection well 6 through a first pipeline, and the coarse sludge tank 1 is used to dilute the sludge generated by the water injection well 6 during the oil production process;

[0039] A subdivided sludge tank 2, wherein the subdivided sludge tank 2 is connected to the coarse sludge tank 1 through a second pipe, and the subdivided sludge tank 2 is used to screen the diluted sludge in the coarse sludge tank 1;

[0040] A profile control liquid preparation mechanism, which is arranged at one side of the subdivided sludge tank 2, and is used to stir the sludge after screening in the subdivided sludge tank 2, and prepare it with a profile control agent liquid to form a sludge profile control agent;

[0041] Injection well 6, the sludge profile control agent enters the bottom of the injection well 6 through the self-priming ability of the injection well 6 and gravity flow.

[0042] The sludge profile control device designed in the present invention comprises a dilution part, a screening part and a stirring and liquid preparation part.

[0043] In the dilution part, the sludge on the oil field site includes sludge from oil reservoir development and production, waste from production activities, and oily dirt on the ground, and most of them are in the form of oil-in-sand and sand-in-oil mixtures with poor fluidity. They have solidified under normal temperature and dehydration conditions. This part of the sludge first enters the coarse sludge pool 1, where it is diluted and roughly classified by the small-volume, high-temperature oil field produced water transported by steel pipes, and the solidified sludge is gradually expanded from the inside to the outside, gradually expanding the dilution area. It mainly sorts waste from production activities such as gravel and plastics.

[0044] In the screening part, the sludge diluted by the coarse sludge tank 1 automatically flows into the fine sludge tank 2 by utilizing the high and low potential energy difference of the device for fine segmentation, mainly to sort out the sludge particles after the coarse segmentation, so as to facilitate the use of profile adjustment and liquid preparation.

[0045] In the stirring and liquid preparation part, the sludge sorted by the subdivided sludge pool 2 automatically flows into the profile control liquid preparation pool 3 again by utilizing the high and low potential energy difference of the device. The profile control agent liquid after stirring utilizes the self-priming capacity of the water injection well 6 and gravity flow into the bottom of the well.

[0046] In this embodiment, the profile adjustment and liquid preparation mechanism includes: a profile adjustment and liquid preparation tank 3 and a stirring device 4. The profile adjustment and liquid preparation tank 3 is connected to the subdivided sludge tank 2 and the water injection well 6 through a third pipe and a fourth pipe respectively. The stirring device 4 is arranged inside the profile adjustment and liquid preparation tank 3. The stirring device 4 is used to stir the sludge that flows into the profile adjustment and liquid preparation tank 3 after being screened in the subdivided sludge tank 2.

[0047] Among them, the pore size of the coarse sludge tank 1 in the sludge profile control device of the present invention is 1 cm 2 The sorting device used in the subdivided sludge tank 2 has a pore size of 4 mm 2 The rough classification process uses the high and low potential energy difference to automatically flow into the fine division device, and the fine division sludge uses the potential energy difference to automatically flow into the profile adjustment liquid preparation tank 3. The transmission ratio of the reduction box 5 is adjusted through theoretical calculation to control the stirring device 4 of the profile adjustment liquid preparation tank 3, so as to facilitate the stirring speed to reach the designed value. The stirred profile adjustment liquid uses the self-priming capacity and gravity of the water injection well 6 to enter the bottom of the well. No external power is required except for stirring during the profile adjustment process.

[0048] When using sludge as a profile control agent for oilfield water injection well 6, the first choice is the oilfield block with a large permeability range, serious heterogeneity, uneven water absorption profile, high permeability zone, and high water content of produced fluid. The No. 1 Oil Production Plant of North China Oilfield has a large area of ​​buried hill reservoirs with an effective permeability between 0.253-1.974μm2. The reservoir fractures are well developed, making it possible for the sludge produced by the reservoir development to return to the oil layer. Taking advantage of the characteristics of the buried hill reservoir of the No. 1 Oil Production Plant and combining it with the geological structure of large pores, the oilfield produced sludge is profiled, the large pores are blocked, the water drive flow direction is changed, the oil drive area is increased, and the oilfield produced sludge is reinjected into the original production formation to achieve harmless treatment of the sludge.

[0049] Well Renx in the buried hill reservoir of the No. 1 Oil Production Plant of Huabei Oilfield was selected as the sludge profile control test well. The water absorption capacity of the well is 20m 3 / h, in order to ensure the fluidity of sludge and the viscosity of profile control agent, the ratio of water to sludge is controlled between 7:1 and 8:1, every 9m 3 The water can adjust 1.2 tons of sludge, and the stirring speed is controlled at 3-9 rpm, which is conducive to sludge suspension. During the trial phase from August 24 to September 24, 2022, a total of 588 bags of sludge were adjusted, weighing a total of 765.88 tons.

[0050] Through the reservoir fluid values, the formula of sludge volume and injection well pressure is simulated, and the injection well suitable for reservoir reinjection is selected according to the pressure value.

[0051] y=8.9923x+9.8639;

[0052] x-injection well pressure; y-sludge volume;

[0053] Determine the specific parameters of the dilution and screening devices. During the shipping process, there is a certain amount of non-reservoir output or scale components in the sludge. If it is larger than the reservoir fractures, it will block the water injection layer. Excessive subdivision will affect the sludge profile adjustment amount.

[0054] In this embodiment, the profile adjustment and liquid preparation mechanism also includes: a reduction box 5, which is arranged on one side of the profile adjustment and liquid preparation pool 3, and is electrically connected to the stirring device 4, and is used to adjust the stirring speed of the stirring device 4.

[0055] In this embodiment, the first pipeline, the second pipeline, the third pipeline and the fourth pipeline are all steel pipes, and the installation angle of the steel pipe is 30° to 45°. The use of steel pipes can increase the service life of the pipelines, reduce the maintenance of the pipelines in the later stage, and save costs. The installation angle of the pipelines is set to facilitate the transportation of sludge through the pipelines and improve the transportation efficiency of the sludge.

[0056] In this embodiment, the stirring device 4 includes a stirrer and a stirring blade, and the outlet of the profile control liquid preparation tank 3 is arranged near the stirring blade. The outlet of the profile control liquid preparation tank 3 is arranged near the stirring blade, so that the stirring blade can conveniently input the sludge in the profile control liquid preparation tank 3 into the water injection well 6 through the outlet of the profile control liquid preparation tank 3 through the fourth pipeline during the stirring process.

[0057] In this embodiment, the installation heights of the coarse sludge tank 1, the fine sludge tank 2 and the profile control liquid preparation tank 3 are in a decreasing trend, and the sludge is transported by the installation height difference between the coarse sludge tank 1, the fine sludge tank 2 and the profile control liquid preparation tank 3. There is an installation height difference between the coarse sludge tank 1, the fine sludge tank 2 and the profile control liquid preparation tank 3, and the sludge is input into the adjacent device through the pipeline by using the high and low potential energy difference between the devices.

[0058] In this embodiment, a valve is installed on the first pipeline, and the valve is located at the entrance of the coarse sludge tank 1, and the sludge generated in the water injection well 6 is input into the coarse sludge tank 1 by opening and closing the valve. A branch is led by a steel pipe on the pipeline from the oil field water injection station to the wellhead of the water injection well 6, and the other end of the steel pipe is connected to the coarse sludge tank 1, and a valve is installed at the entrance of the coarse sludge tank 1.

[0059] Example 2

[0060] Based on the sludge profile control device described in Example 1, this embodiment further provides an injection method for the sludge profile control device, the injection method comprising:

[0061] S1. The sludge generated during oil extraction in the water injection well 6 is input into the coarse sludge pool 1 through the first pipeline, and the sludge is diluted and coarsely processed;

[0062] S2. The sludge diluted by the coarse sludge tank 1 automatically flows into the subdivided sludge tank 2 for subdivided treatment by utilizing the high and low potential energy difference of the device;

[0063] S3. The sludge sorted by the subdivided sludge pool 2 automatically flows into the profile control liquid preparation mechanism again by utilizing the high and low potential energy difference of the device, and the profile control liquid preparation mechanism is used to stir the sludge after the screening treatment in the subdivided sludge pool 2, and prepare it with the profile control agent liquid to form a sludge profile control agent;

[0064] S4. The sludge profile control agent enters the bottom of the water injection well 6 through the self-priming ability of the water injection well 6 and gravity flow, completing the recycling of the sludge.

[0065] In this embodiment, the sludge sorted by the subdivided sludge pool 2 automatically flows into the profile control liquid preparation mechanism again by utilizing the high and low potential energy difference of the device. The profile control liquid preparation mechanism is used to stir the sludge after the screening treatment in the subdivided sludge pool 2, and prepare it with the profile control agent liquid to form a sludge profile control agent, including:

[0066] S31. The sludge sorted by the subdivided sludge pool 2 is input into the profile adjustment liquid preparation pool 3 through a third pipeline;

[0067] S32. The stirring device 4 provided in the profile control liquid preparation tank 3 stirs the sludge in the profile control liquid preparation tank 3;

[0068] S33. During the stirring process, the stirring device 4 is electrically connected to the stirring device 4 through the reduction box 5, thereby adjusting the stirring speed of the stirring device 4.

[0069] The present invention uses sludge as the main raw material of the profile control agent used in the profile control process in the oil production process. After pretreatment and processing, an emulsified suspension that can meet the formation profile control is formed, which can not only meet the profile control process requirements, reduce the amount of polymer used in the profile control process, reduce the profile control cost, but also can treat the sludge as a resource and eliminate environmental pollution. The main technical means is to combine the oil field water injection well profile control process, use the characteristics of the sludge itself generated in the oil field exploitation process, and develop a sludge profile control device. The sludge is diluted, screened, and stirred on the ground by the device to prepare a sludge profile control agent suitable for the water injection well, so as to achieve the strength of the sludge particles blocking the high permeability layer, and use the water injection well to inject the plugging agent into the high permeability layer in the formation, forcing the injected water to flow toward the low permeability layer, thereby adjusting the water absorption profile of the water injection well, improving the heterogeneity of the underground reservoir, and finally achieving the purpose of improving the crude oil recovery rate.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0071] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A sludge profile control device, characterized in that: include: A coarse sludge pool (1), the coarse sludge pool (1) being connected to a water injection well (6) via a first pipeline, the coarse sludge pool (1) being used to dilute sludge generated by the water injection well (6) during oil production; A subdivided sludge tank (2), the subdivided sludge tank (2) being connected to the coarse sludge tank (1) via a second pipe, the subdivided sludge tank (2) being used to screen the diluted sludge in the coarse sludge tank (1); A profile control liquid preparation mechanism, the profile control liquid preparation mechanism being arranged at one side of the subdivided sludge tank (2), the profile control liquid preparation mechanism being used to stir the sludge after the sieving treatment in the subdivided sludge tank (2), and to prepare the sludge with the profile control agent liquid to form a sludge profile control agent; Injection well (6), the sludge profile control agent enters the bottom of the injection well (6) through the self-priming ability of the injection well (6) and gravity flow.

2. A sludge profile control device according to claim 1, characterized in that: The profile adjustment and liquid preparation mechanism comprises: a profile adjustment and liquid preparation tank (3) and a stirring device (4); the profile adjustment and liquid preparation tank (3) is connected to the subdivided sludge tank (2) and the water injection well (6) through a third pipe and a fourth pipe respectively; the stirring device (4) is arranged inside the profile adjustment and liquid preparation tank (3); the stirring device (4) is used to stir the sludge that flows into the profile adjustment and liquid preparation tank (3) after being screened in the subdivided sludge tank (2).

3. A sludge profile control device according to claim 2, characterized in that: The profile adjustment and liquid preparation mechanism also includes: a reduction box (5), the reduction box (5) is arranged on one side of the profile adjustment and liquid preparation pool (3), the reduction box (5) is electrically connected to the stirring device (4), and the reduction box (5) is used to adjust the stirring speed of the stirring device (4).

4. A sludge profile control device according to claim 3, characterized in that: The first pipeline, the second pipeline, the third pipeline and the fourth pipeline are all steel pipes, and the installation angle of the steel pipes is 30° to 45°.

5. The sludge profile control device according to claim 3, characterized in that: The stirring device (4) comprises a stirrer and a stirring blade, and the outlet of the profile control liquid preparation pool (3) is arranged closest to the stirring blade.

6. A sludge profile control device according to claim 5, characterized in that: The installation heights of the coarse sludge tank (1), the fine sludge tank (2) and the profile adjustment and liquid preparation tank (3) show a decreasing trend, and the sludge is transported by the installation height difference between the coarse sludge tank (1), the fine sludge tank (2) and the profile adjustment and liquid preparation tank (3).

7. A sludge profile control device according to claim 6, characterized in that: A valve is installed on the first pipeline, and the valve is located at the entrance of the coarse sludge tank (1). The sludge generated in the water injection well (6) is input into the coarse sludge tank (1) by opening and closing the valve.

8. An injection method for a sludge profile control device according to any one of claims 1 to 7, characterized in that: The injection method comprises: S1. The sludge generated during oil extraction in the water injection well (6) is input into the coarse sludge pool (1) through the first pipeline to dilute the coarse sludge; S2. The sludge diluted by the coarse sludge tank (1) automatically flows into the subdivided sludge tank (2) for subdivided treatment by utilizing the high and low potential energy difference of the device; S3. The sludge sorted by the subdivided sludge pool (2) automatically flows into the profile control liquid preparation mechanism again by utilizing the high and low potential energy difference of the device, and the profile control liquid preparation mechanism is used to stir the sludge after the screening treatment in the subdivided sludge pool (2) and prepare it with the profile control agent liquid to form a sludge profile control agent; S4. The sludge profile control agent enters the bottom of the water injection well (6) through the self-priming ability of the water injection well (6) and gravity flow, thereby completing the recycling of the sludge.

9. An injection method according to claim 8, characterized in that: The sludge sorted by the subdivided sludge tank (2) automatically flows into the profile control liquid preparation mechanism again by utilizing the high and low potential energy difference of the device. The profile control liquid preparation mechanism is used to stir the sludge after the screening treatment in the subdivided sludge tank (2) and prepare it with the profile control agent liquid to form a sludge profile control agent, comprising: S31. The sludge sorted by the subdivided sludge pool (2) is input into the profile adjustment liquid pool (3) through a third pipeline; S32. The stirring device (4) provided in the profile adjustment liquid preparation tank (3) stirs the sludge in the profile adjustment liquid preparation tank (3); S33. During the stirring process, the stirring device (4) is electrically connected to the stirring device (4) through the reduction box (5), thereby adjusting the stirring speed of the stirring device (4).

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