Asphaltene deposition experimental equipment and experimental method

Abstract

The invention relates to asphaltene deposition experimental equipment and experimental method, a rotating device is arranged at the top in an experimental deposition kettle, a magnetic heating device is arranged at the bottom, and the magnetic heating device is used for heating crude oil in the experimental deposition kettle; the bearing disc is arranged in the experimental deposition kettle and is connected with the rotating device; a glass slide is mounted on the bearing disc; the image acquisition and analysis device is arranged above the glass slide; the high-pressure infusion pump device is connected with the experimental deposition kettle and is used for providing reaction pressure for the experimental deposition kettle; the carbon dioxide pumping device is connected with the experimental deposition kettle through a pipeline; the equipment analyzes the deposition amount and size distribution of asphaltene under different conditions by evaluating the influence of different parameters such as pressure, temperature and carbon dioxide-fluid composition on asphaltene formation and deposition; the device realizes acquisition and analysis of asphaltene precipitation and deposition images in the gas injection process, and provides data for subsequent modeling and prediction research.

Description

Technical Field

[0001] The invention belongs to the technical field of petroleum development experiments, and in particular relates to asphaltene deposition experimental equipment and an experimental method. Background Art

[0002] CO2 flooding has become a popular method for enhanced oil recovery (EOR) because it not only effectively increases oil recovery, but also significantly reduces greenhouse gas emissions. However, this method is prone to asphaltene deposition, which changes the wettability of formation rocks from water-wet to oil-wet, and may also cause reservoir blockage, ultimately leading to reduced oil recovery performance; asphaltene precipitation can also severely damage the wellbore area, block production pipelines, and reduce the production capacity of surface facilities.

[0003] Therefore, to better predict reservoir dynamics, more knowledge is needed on the effects of key parameters such as pressure, temperature and composition on asphaltene precipitation and deposition processes in reservoirs and surface facilities, including production and CO2 injection processes.

[0004] At present, various CO2 EOR processes have been extensively studied in the laboratory, numerically simulated and applied in the field. The main effects of CO2 flooding are the reduction of crude oil viscosity, oil expansion effect and the change of the interface properties of the crude oil-CO2 system, which improves the ultimate recovery of crude oil. In recent years, the molecular properties of asphaltene have been extensively studied, but there is a lack of data collection and analysis of asphaltene precipitation and deposition images under high temperature and high pressure during gas injection to provide data for subsequent modeling and prediction research. Summary of the invention

[0005] In view of at least one of the problems in the above-mentioned prior art, the purpose of the present invention is to provide an asphaltene deposition experimental device and an experimental method, which can analyze the deposition amount and size distribution of asphaltene under different conditions by evaluating the effects of different parameters such as pressure, temperature and carbon dioxide-fluid composition on the formation and deposition of asphaltene; the equipment realizes the collection and analysis of asphaltene precipitation and deposition images during the gas injection process, providing data for subsequent modeling and prediction research.

[0006] To achieve the above object, the present invention adopts the following technical solutions: An asphaltene deposition experimental device, characterized in that it comprises: An experimental sedimentation kettle, wherein a rotating device is arranged on the top and a magnetic heating device is arranged on the bottom, wherein the magnetic heating device is used to heat the crude oil in the experimental sedimentation kettle; A carrier plate is arranged in the experimental deposition reactor and connected to the rotating device; the carrier plate is equipped with a glass slide; An image acquisition and analysis device, disposed above the glass slide, for acquiring and analyzing a microscopic image of asphaltene deposition on the surface of the glass slide; A high-pressure infusion pump device, connected to the experimental deposition kettle, and used to provide reaction pressure for the experimental deposition kettle; A carbon dioxide pumping device is connected to the experimental deposition reactor through a pipeline.

[0007] Preferably, the rotating device includes a rotating support and a magnetic member, one end of the rotating support is connected to the top of the experimental deposition kettle, and the other end of the rotating support is rotatably connected to the carrying plate, the carrying plate is made of magnetically affinity metal, and the magnetic member is arranged on the outer wall of the experimental deposition kettle, and the carrying plate is driven to rotate by moving the magnetic member.

[0008] Preferably, the image acquisition and analysis device includes a microscope, a CCD camera and an image analysis module, the lens of the microscope passes through the top of the experimental deposition kettle and is located above the glass slide; the CCD camera is connected to the microscope and the image analysis module respectively, and the CCD camera is used to acquire the microscopic image of asphaltene deposition observed by the microscope and transmit it to the image analysis module.

[0009] Preferably, the glass slide is a transparent glass slide.

[0010] Preferably, the image acquisition and analysis device further comprises a cold light source, and a light outlet of the cold light source is arranged directly below the microscope.

[0011] Preferably, a stirring rod is provided on the bottom plate of the experimental sedimentation kettle, and the stirring rod is used to stir the crude oil in the experimental sedimentation kettle.

[0012] Preferably, the high-pressure infusion pump device includes a piston-cylinder assembly, a high-pressure infusion pump and a collecting device, one end of the piston-cylinder assembly is connected to the experimental sedimentation kettle through a pipeline, the other end of the piston-cylinder assembly is connected to one end of the high-pressure infusion pump, and the other end of the high-pressure infusion pump is connected to the collecting device. Preferably, the carrier plate is a circular plate, and a plurality of the glass slides are evenly spaced circumferentially arranged on the carrier plate.

[0013] An asphaltene deposition experimental method is performed based on any of the asphaltene deposition experimental devices described above, comprising the following steps: Inject crude oil into the experimental sedimentation kettle, and adjust the pressure and temperature in the experimental sedimentation kettle by a high-pressure infusion pump device and a magnetic heating device; Injecting carbon dioxide into the experimental deposition reactor through a carbon dioxide pumping device; When the temperature and pressure in the experimental deposition kettle are adjusted to the set temperature and pressure and stabilized, wait for the set time, and the asphaltene in the crude oil will be completely deposited on the glass slide; An image acquisition and analysis device was used to collect and analyze microscopic images of asphaltene deposition on the surface of the glass slide.

[0014] Preferably, in the process of adjusting the pressure and temperature in the experimental sedimentation kettle by the high-pressure infusion pump device and the magnetic heating device, the crude oil is stirred by rotating the stirring rod.

[0015] The present invention adopts the above technical solution, which has the following advantages: The asphaltene deposition experimental equipment and experimental method provided by the present invention can evaluate the influence of different parameters such as pressure, temperature and carbon dioxide-fluid composition on the formation and deposition of asphaltene by studying the deposition mechanism of asphaltene during the injection of carbon dioxide at different pressures and temperatures, intuitively recording the entire process by using a high-resolution microscope, and analyzing the formation and deposition of asphaltene particles at different stages of the experiment. Then, image processing software is used for analysis to analyze the deposition amount and size distribution of asphaltene under different conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the asphaltene deposition experimental equipment provided in Example 1 of the present invention.

[0017] Figure 2 It is a flow chart of the steps of the asphaltene deposition experimental method provided in the second embodiment of the present invention.

[0018] Markings in the accompanying drawings: 1 is an image analysis module, 2 is a CCD camera, 3 is a microscope, 4 is a rotating support, 5 is an experimental deposition kettle, 6 is a magnetic component, 7 is a cold light source, 8 is a piston cylinder assembly, 9 is a high-pressure infusion pump, 10 is a collecting device, 11 is a carrier plate, 12 is a glass slide, 13 is a stirring rod, 14 is a magnetic heating device, and 15 is a carbon dioxide pumping device. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of 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.

[0020] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "backward", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the system or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. The arrows in the accompanying drawings represent the flow direction of the substance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "assembly", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] The present invention provides an asphaltene deposition experimental device and an experimental method, which can analyze the deposition amount and size distribution of asphaltene under different conditions by evaluating the influence of different parameters such as pressure, temperature and carbon dioxide-fluid composition on the formation and deposition of asphaltene; the device realizes the collection and analysis of asphaltene precipitation and deposition images during the gas injection process, and provides data for subsequent modeling and prediction research.

[0023] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0024] Example 1 Please refer to Figure 1 , an asphaltene deposition experimental device provided in this embodiment includes an experimental deposition kettle 5, a carrier plate 11, an image acquisition and analysis device, a high-pressure infusion pump device and a carbon dioxide pumping device 15; A rotating device is provided at the top of the experimental sedimentation kettle 5, and a magnetic heating device 14 is provided at the bottom. The magnetic heating device 14 is used to heat the crude oil in the experimental sedimentation kettle 5; The carrier plate 11 is disposed in the experimental deposition reactor 5 and connected to the rotating device; the carrier plate 11 is equipped with a glass slide 12; The image acquisition and analysis device is arranged above the glass slide 12 and is used to acquire and analyze the microscopic image of asphaltene deposition on the surface of the glass slide; The high-pressure infusion pump device is connected to the experimental deposition reactor 5, and the high-pressure infusion pump device is used to provide reaction pressure for the experimental deposition reactor 5; The carbon dioxide pumping device 15 is connected to the experimental deposition reactor 5 through a pipeline.

[0025] Specifically, crude oil is injected into the experimental deposition kettle 5, and the magnetic heating device 14 includes a high-precision heating controller that can control the heating temperature of the magnetic heating device 14. The crude oil is heated by the magnetic heating device 14 to increase the temperature of the crude oil, and the experimental deposition kettle 5 is pressurized by the high-pressure infusion pump device. The magnetic heating device 14 is combined with the high-pressure infusion pump device 9 to adjust the temperature and pressure inside it to generate high temperature and high pressure. Carbon dioxide is injected into the experimental deposition kettle 5 through the carbon dioxide pumping device 15, and the effect of different concentrations of carbon dioxide injection on asphaltene can be observed.

[0026] In the asphaltene deposition experimental equipment of this embodiment, different types of glass slides 12 are installed on the carrier plate 11, and the glass slides 12 are transparent glass slides. The crude oil is heated and pressurized in the experimental deposition kettle 5, and the asphaltene in the crude oil is precipitated on the glass slide 12. The carrier plate 11 is a circular plate, and multiple glass slides 12 are evenly spaced in the circumferential direction on the carrier plate 11. In the experiment, the observation of multiple transparent glass slides 12 can be processed at one time.

[0027] During the experiment, crude oil is first introduced into the experimental deposition kettle 5, and the temperature and pressure in the experimental deposition kettle 5 are adjusted by the magnetic heating device 14 and the high-pressure infusion pump device to create a high-temperature and high-pressure environment; then carbon dioxide is introduced through the carbon dioxide pumping device 15, and the deposition of asphaltene on the glass slide 12 is observed by the image acquisition and analysis device. The carrying plate 11 is driven to rotate by the rotating device, and the rotation of the carrying plate 11 realizes the adjustment of the positions of multiple glass slides 12, so that different glass slides 12 are located under the image acquisition and analysis device, and the deposition image of asphaltene on the glass slide 11 is acquired by the image acquisition and analysis device, and the image is analyzed.

[0028] The asphaltene deposition experimental equipment of this embodiment, the magnetic heating device 14 and the high-pressure infusion pump device can create different temperatures and pressures in the experimental deposition kettle 5, and the carbon dioxide pumping device 15 can produce different concentration inputs to observe the effects of different temperatures, pressures and different concentrations of carbon dioxide injection on asphaltene. The deposition of asphaltene is quantified by the image processing software in the image acquisition and analysis device, thereby providing data for subsequent modeling and prediction research. In this embodiment, the rotating device includes a rotating support 4 and a magnetic member 6. One end of the rotating support 4 is connected to the top of the experimental deposition kettle 5, and the other end of the rotating support 4 is rotatably connected to a carrying plate 11. The carrying plate 11 is made of a magnetically-friendly metal. The magnetic member 6 is arranged on the outer wall of the experimental deposition kettle 5, and the carrying plate is driven to rotate by moving the magnetic member 6.

[0029] Specifically, the rotating support member 4 includes an integrally connected support block and a support rod, the support block is connected to the top of the inner cavity of the experimental deposition kettle 5, and the support rod is rotatably connected to the rotation center of the carrying plate 11; the carrying plate 11 can be made of steel. When the carrying plate 11 needs to be rotated, when the operator moves the magnetic member 6 circumferentially along the outer wall of the experimental deposition kettle 5, the suction force between the magnetic member 6 and the carrying plate 11 can make the carrying plate 11 intermittently rotate at a certain angle in the experimental deposition kettle 5, so that the glass slide 12 is located at a position corresponding to the image acquisition and analysis device, that is, the glass slide 12 is located directly below the microscope 3, and the image acquisition and analysis device is used to collect and analyze the microscopic image of asphaltene deposition on the surface of the transparent glass slide 12. In other embodiments, the rotating support 4 is a motor, which is installed on the top of the experimental deposition reactor 5. The output shaft of the motor is fixedly connected to the rotation center of the carrier plate 11. The motor drives the carrier plate 11 to rotate intermittently at a certain angle, so that the slide 12 is located directly below the microscope 3.

[0030] In this embodiment, the image acquisition and analysis device includes a microscope 3, a CCD camera 2 and an image analysis module 1. A lens passage hole is provided on the top of the experimental deposition kettle 5, and the lens of the microscope passes through the top of the experimental deposition kettle 5 through the lens passage hole and is located above the glass slide; the CCD camera is connected to the microscope and the image analysis module respectively, and the CCD camera is used to collect the microscopic image of asphaltene deposition observed by the microscope and transmit it to the image analysis module.

[0031] Specifically, the microscope 3 is arranged above the carrier plate 11, and the microscope 3 is used to obtain the microscopic image of asphaltene deposition on the surface of the glass slide 12, and the CCD camera 2 is used to collect the microscopic image of asphaltene deposition and transmit it to the image analysis module 1; the microscope 3 is a high-resolution microscope 3, and the high-resolution microscope 3 and the CCD camera 2 are used to capture the high-resolution image and video of asphaltene deposition on the glass slide, so as to further analyze the asphaltene precipitation mechanism, and the geometric characteristics of asphaltene aggregation can be analyzed by the image analysis module 1, and the image analysis module 1 includes a computer, and the computer is equipped with image analysis software.

[0032] In this embodiment, the image acquisition and analysis device also includes a cold light source 7. The cold light source 7 is outside the experimental deposition kettle 5, and part of the light outlet pipe extends from the bottom of the experimental deposition kettle 5 into the experimental deposition kettle 5. The light outlet of the cold light source 7 is arranged directly below the microscope 3.

[0033] Specifically, the cold light source 7 is disposed below the carrier plate 11 and at a side away from the microscope 3 . The cold light source 7 can more clearly observe the deposition on the transparent glass slide 12 without generating excess heat.

[0034] In this embodiment, a stirring rod 13 is provided on the bottom plate of the experimental sedimentation kettle 5 , and the stirring rod 13 is used to stir the crude oil in the experimental sedimentation kettle 5 .

[0035] Specifically, the stirring rod 13 is a cross-shaped rod, the vertical rod is rotatably connected to the bottom plate of the experimental deposition kettle 5, the stirring rod 13 is a magnetophilic material, the magnetic heating device 14 is a magnetic heating stirrer, the stirring rod 13 is a stirring rod of the magnetic heating stirrer, the stirring speed and heating temperature of the stirring rod 13 can be controlled by the magnetic heating stirrer, and the magnetic heating stirrer controls the stirring rod 13 to rotate and stir the crude oil. By providing the stirring rod 13, the crude oil can be stirred to avoid asphaltene from being deposited on the glass slide 12 of the carrier plate 11 before the temperature and pressure are stabilized during the temperature and pressure increase of the experimental deposition kettle 5.

[0036] In other embodiments, a motor is installed at the bottom of the experimental sedimentation kettle 5, and the output shaft of the motor is fixedly connected to the vertical rod of the stirring rod 13, and the stirring rod 13 is driven by the motor to rotate to achieve stirring of the crude oil.

[0037] In this embodiment, the high-pressure infusion pump device includes a piston-cylinder assembly 8, a high-pressure infusion pump 9 and a collecting device 10. One end of the piston-cylinder assembly 8 is connected to the experimental sedimentation kettle 5 through a pipeline, and the other end of the piston-cylinder assembly 8 is connected to one end of the high-pressure infusion pump 9, and the other end of the high-pressure infusion pump 9 is connected to the collecting device 10; the piston-cylinder assembly 8 is used to inject crude oil into the experimental sedimentation kettle 5, and the collecting device 10 is used to collect the crude oil.

[0038] Specifically, during the process of creating a high-pressure environment in the experimental deposition kettle 5, a high-pressure environment is created by a high-pressure infusion pump 9. After the experiment is completed, the crude oil is output through the piston cylinder assembly 8 and the high-pressure infusion pump 9, and output to the collection device 10 for collection. The collection device 10 is a collection container, and the high-pressure infusion pump device 9 is used to recover the liquid into the collection container. The piston cylinder assembly 8 equipped with the high-pressure infusion pump 9 is used to generate high-pressure liquid flow. The piston cylinder assembly 8 is usually composed of a cylinder and a piston. The reciprocating motion of the piston pushes the liquid through the inlet and outlet of the high-pressure infusion pump 9. There are inlet valves and outlet valves in the inlet and outlet to control the liquid flowing into and out of the cylinder to ensure that the liquid flows in one direction. Liquid suction process: the piston moves backward, the inlet valve opens, and the external liquid enters the cylinder through the inlet. At this time, the outlet valve is closed to prevent the liquid from flowing back and flowing to the container through the cylinder; the liquid delivery process is the opposite. The piston moves forward to push the liquid sucked into the cylinder. At this time, the outlet valve opens, and the liquid flows to the collection container through the outlet.

[0039] In this embodiment, an observation window is provided on the upper part of the outer wall of the upper part of the experimental deposition reactor 5. The observation window is a sapphire glass window, through which the asphaltene deposition on the glass slide surface 12 can be observed from the side.

[0040] Example 2 Please refer to Figure 2 The asphaltene deposition experimental method provided in this embodiment is completed using the asphaltene deposition experimental equipment in Example 1, and includes the following steps: S01, injecting crude oil into the experimental sedimentation kettle 5, and adjusting the pressure and temperature in the experimental sedimentation kettle 5 by the high-pressure infusion pump device and the magnetic heating device 14; S02, injecting carbon dioxide into the experimental deposition reactor 5 through the carbon dioxide pumping device 15; S03, when the temperature and pressure in the experimental deposition reactor 5 are adjusted to the set temperature and pressure and stabilized, wait for the set time, and the asphaltene in the crude oil is completely deposited on the glass slide 12; S04. Using an image acquisition and analysis device to acquire and analyze the microscopic image of asphaltene deposition on the surface of the glass slide 12.

[0041] Specifically, in step S01, during the process of increasing temperature and pressure in the experimental deposition kettle 5, the crude oil is stirred by rotating the stirring rod 13. When the temperature and pressure are adjusted to the set temperature and pressure and stabilized, the asphaltene in the crude oil is deposited on the glass slide 12 for 2 to 3 hours to complete the deposition of the asphaltene.

[0042] In this embodiment, crude oil is injected into the experimental deposition kettle 5, and the temperature is stabilized at 70°C by the magnetic heating device 14; the pressure in the experimental deposition kettle 5 is gradually increased to 10MPa by a high-pressure infusion pump device; in the process of increasing the temperature and pressure of the equipment, asphaltene is easily deposited on the transparent slide glass 12, and the solution can be stirred by rotating the stirring rod 13 to achieve the purpose of removing the particles deposited before the experiment; after the temperature and pressure of the equipment are stabilized, the asphaltene in the oil product is allowed to deposit on the slide glass 12 for 2 to 3 hours until the whole system reaches a stable state. From the observation window on the side of the experimental deposition kettle 5, it is observed that there is no more asphaltene deposition on the slide glass surface 12, and the equilibrium state is reached at this time, and a high-resolution microscope 3 and a CCD camera 2 are used for observation and imaging. The pressure is further reduced to 8 MPa at a constant temperature, and the solution is stirred again by rotating the stirring rod 13. The stirring and rotation causes the liquid to flow. The glass slide 12 is in the crude oil, and the liquid flow drives the liquid flow around the glass slide 12. When a certain stirring speed and time are reached, the microscope 3 is used for observation, and the liquid flow is followed to remove the asphaltene particles deposited on the glass slide 12 under the high pressure in the previous step. After the temperature and pressure of the equipment reach a balanced and stable state, the observation and imaging are continued. The above steps can be repeated to observe at different temperatures / pressures.

[0043] In order to study the effect of carbon dioxide on asphaltene deposition, different concentrations of carbon dioxide are injected through the carbon dioxide pumping device 15 under different temperatures and pressures, and the asphaltene deposition area and particle size distribution are measured through the image analysis module 1, so as to evaluate the effects of different parameters such as pressure, temperature and carbon dioxide-fluid composition on asphaltene formation and deposition, and analyze the deposition amount and size distribution of asphaltene under different conditions; the equipment realizes the collection and analysis of asphaltene precipitation and deposition images during the gas injection process, providing data for subsequent modeling and prediction research.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these 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 invention.

Claims

1. An asphaltene deposition experimental device, characterized in that: include: An experimental sedimentation kettle, wherein a rotating device is arranged on the top and a magnetic heating device is arranged on the bottom, wherein the magnetic heating device is used to heat the crude oil in the experimental sedimentation kettle; A carrier plate is arranged in the experimental deposition reactor and connected to the rotating device; the carrier plate is equipped with a glass slide; An image acquisition and analysis device, disposed above the glass slide, for acquiring and analyzing a microscopic image of asphaltene deposition on the surface of the glass slide; A high-pressure infusion pump device, connected to the experimental deposition kettle, and used to provide reaction pressure for the experimental deposition kettle; A carbon dioxide pumping device is connected to the experimental deposition reactor through a pipeline.

2. The asphaltene deposition experimental equipment according to claim 1, characterized in that: The rotating device includes a rotating support and a magnetic part. One end of the rotating support is connected to the top of the experimental deposition kettle, and the other end of the rotating support is rotatably connected to the carrying plate. The carrying plate is made of magnetically affinity metal. The magnetic part is arranged on the outer wall of the experimental deposition kettle, and the carrying plate is driven to rotate by moving the magnetic part.

3. The asphaltene deposition experimental equipment according to claim 1, characterized in that: The image acquisition and analysis device includes a microscope, a CCD camera and an image analysis module. The lens of the microscope passes through the top of the experimental deposition kettle and is located above the glass slide. The CCD camera is connected to the microscope and the image analysis module respectively. The CCD camera is used to acquire the microscopic image of asphaltene deposition observed by the microscope and transmit it to the image analysis module.

4. The asphaltene deposition experimental equipment according to claim 3, characterized in that: The glass slide is a transparent glass slide.

5. The asphaltene deposition experimental equipment according to claim 4, characterized in that: The image acquisition and analysis device also includes a cold light source, and a light outlet of the cold light source is arranged directly below the microscope.

6. The asphaltene deposition experimental equipment according to claim 1, characterized in that: A stirring rod is arranged on the bottom plate of the experimental sedimentation kettle, and the stirring rod is used to stir the crude oil in the experimental sedimentation kettle.

7. The asphaltene deposition experimental equipment according to claim 1, characterized in that: The high-pressure infusion pump device includes a piston-cylinder assembly, a high-pressure infusion pump and a collecting device. One end of the piston-cylinder assembly is connected to the experimental sedimentation kettle through a pipeline, the other end of the piston-cylinder assembly is connected to one end of the high-pressure infusion pump, and the other end of the high-pressure infusion pump is connected to the collecting device.

8. The asphaltene deposition experimental equipment according to claim 1, characterized in that: The carrying plate is a circular plate, and a plurality of glass slides are evenly spaced and arranged on the carrying plate in the circumferential direction.

9. An asphaltene deposition experimental method, characterized in that: The asphaltene deposition experimental equipment according to any one of claims 1 to 8 is completed, comprising the following steps: Inject crude oil into the experimental sedimentation kettle, and adjust the pressure and temperature in the experimental sedimentation kettle by a high-pressure infusion pump device and a magnetic heating device; Injecting carbon dioxide into the experimental deposition reactor through a carbon dioxide pumping device; When the temperature and pressure in the experimental deposition kettle are adjusted to the set temperature and pressure and stabilized, wait for the set time, and the asphaltene in the crude oil will be completely deposited on the glass slide; An image acquisition and analysis device was used to collect and analyze microscopic images of asphaltene deposition on the surface of the glass slide.

10. The asphaltene deposition experimental method according to claim 9, characterized in that: In the process of adjusting the pressure and temperature in the experimental sedimentation kettle by the high-pressure infusion pump device and the magnetic heating device, the crude oil is stirred by rotating the stirring rod.

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