CN115639308A - Wax removal experimental method based on in-situ utilization of asphaltenes - Google Patents
Wax removal experimental method based on in-situ utilization of asphaltenes Download PDFInfo
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- CN115639308A CN115639308A CN202111631292.5A CN202111631292A CN115639308A CN 115639308 A CN115639308 A CN 115639308A CN 202111631292 A CN202111631292 A CN 202111631292A CN 115639308 A CN115639308 A CN 115639308A
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- 238000002474 experimental method Methods 0.000 title claims abstract description 46
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 79
- 239000012188 paraffin wax Substances 0.000 claims abstract description 74
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 16
- 239000000498 cooling water Substances 0.000 claims abstract description 15
- 238000002844 melting Methods 0.000 claims abstract description 7
- 230000008018 melting Effects 0.000 claims abstract description 7
- 239000001993 wax Substances 0.000 claims description 46
- QPUYECUOLPXSFR-UHFFFAOYSA-N 1-methylnaphthalene Chemical compound C1=CC=C2C(C)=CC=CC2=C1 QPUYECUOLPXSFR-UHFFFAOYSA-N 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 7
- 238000005303 weighing Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 2
- 235000019476 oil-water mixture Nutrition 0.000 abstract description 2
- 239000010779 crude oil Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000003921 oil Substances 0.000 description 6
- 235000019198 oils Nutrition 0.000 description 6
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 5
- 235000017491 Bambusa tulda Nutrition 0.000 description 5
- 241001330002 Bambuseae Species 0.000 description 5
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 5
- 239000011425 bamboo Substances 0.000 description 5
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- 230000008859 change Effects 0.000 description 3
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- 230000008021 deposition Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
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- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
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- 230000000052 comparative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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- 229920005989 resin Polymers 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
A paraffin removal experiment method based on in-situ utilization of asphaltenes comprises the following steps: 1) Assembling paraffin removal equipment, fixing the bottom of a rotary cylinder with an opening at the upper end and a closed bottom at the middle part of a tray, filling paraffin removal liquid containing asphaltene into an outer cavity formed by the rotary cylinder and a cold finger cylinder, and then fixing the cold finger cylinder at the middle part in the rotary cylinder; 2) Water is introduced into the cold finger cylinder through a cooling water exchanger to form circulation, and the water in the cold finger cylinder is controlled within the required experiment temperature range; 3) Introducing water into the constant-temperature water tank through a constant-temperature water bath instrument to form circulation, and controlling the water in the constant-temperature water tank to be in a required experimental temperature range, wherein the experimental temperature is controlled to be above the melting point of paraffin; 4) The motor is started, the frequency is adjusted, the revolution is adjusted, the rotating cylinder is made to rotate at the required experiment revolution, and the paraffin removal experiment under the flowing condition is achieved. The paraffin removal experiment method disclosed by the invention is reasonable in design and can be used for measuring the paraffin removal rule of the oil-water mixture under different conditions.
Description
Technical Field
The invention relates to a paraffin removal method, in particular to a paraffin removal experimental method based on in-situ utilization of asphaltene.
Background
The waxy crude oil is a complex mixture mainly composed of paraffin, aromatic hydrocarbon, asphaltene and resin, wherein the paraffin content is high (the wax content of the crude oil is about 20%, and the wax content of the crude oil is as high as 47.1% in some cases). In the process of exploitation and transportation, when the temperature changes and the temperature of the wall of the oil pipe drops below the wax precipitation point of the crude oil, wax crystal molecules in the crude oil can be continuously precipitated and deposited on the wall surface of the oil pipe. With the increase of time, a wax precipitation layer becomes thick, the mobility of crude oil in a pipeline becomes poor, and the exploitation and transportation efficiency is influenced; and in severe cases, oil pipes are blocked, so that production is stopped, and economic loss is caused. Therefore, on the basis of mastering the wax deposition characteristic, the development of the high-efficiency low-energy-consumption wax removal technology has important significance for ensuring the safe production of crude oil and reducing the operation energy consumption. The asphaltene is one of four components of crude oil, the content of the asphaltene can reach up to 30 percent, and the asphaltene has two-sided properties, on one hand, the asphaltene can be used as wax crystals for paraffin deposition to promote the wax deposition; on the other hand, asphaltene is a natural surfactant and has a promoting effect on wax crystal removal. Therefore, it is crucial to develop a paraffin removal mechanism based on in situ utilization of asphaltenes.
Disclosure of Invention
The invention provides a paraffin removal experimental method based on in-situ utilization of asphaltene, aiming at overcoming the defects of the prior art.
A paraffin removal experiment method based on in-situ utilization of asphaltene comprises the following steps:
1) Wax removing equipment for assembling
Placing a tray in a constant-temperature water tank, wherein the tray is connected with the output end of an adjustable-speed motor through a bottom shaft of the tray, the adjustable-speed motor is connected with a frequency converter, the shaft and the constant-temperature water tank are well sealed, a water inlet of the constant-temperature water tank is connected with an outlet of a constant-temperature water bath instrument through a pipeline, and a water outlet of the constant-temperature water tank is connected with an inlet of the constant-temperature water bath instrument through a pipeline;
fixing a coil pipe inside a cold finger cylinder, forming an inner cavity by the coil pipe and the cold finger cylinder, fixing a wax layer on the outer side surface of the cold finger cylinder, sealing the upper end and the lower end of the cold finger cylinder, leading out joints from the top end of the coil pipe and the top end of the inner cavity, connecting an outlet of a cooling water exchanger with a top end joint of the coil pipe through a pipeline, and connecting an inlet of the cooling water exchanger with a top end joint of the inner cavity through a pipeline;
the bottom of a rotary cylinder with an opening at the upper end and a closed bottom is fixed in the middle of a tray, paraffin removal liquid containing asphaltene is filled into an outer cavity formed by the rotary cylinder and a cold finger cylinder, and then the cold finger cylinder is fixed in the middle of the rotary cylinder.
2) Introducing water into the cold finger cylinder through a cooling water exchanger to form circulation, and controlling the water in the cold finger cylinder within a required experiment temperature range;
3) Introducing water into the constant-temperature water tank through a constant-temperature water bath instrument to form circulation, and controlling the water in the constant-temperature water tank to be in a required experimental temperature range, wherein the experimental temperature is controlled to be above the melting point of paraffin;
4) The motor is started, the frequency is adjusted, the revolution is adjusted, the rotating cylinder is made to rotate at the required experiment revolution, and the paraffin removal experiment under the flowing condition is achieved.
Compared with the prior art, the invention has the beneficial effects that:
the invention selects the asphaltene as the surfactant to carry out the paraffin removal experiment, and the asphaltene has the function of natural surface activity, so the method can carry out high-efficiency and low-energy-consumption paraffin removal based on the in-situ utilization of the asphaltene, can be used for measuring the paraffin removal rule of crude oil and oil-water mixtures under different conditions, and has important significance for the economic operation and safety of oil extraction and transportation. The rotating cylinder is driven by the speed-adjustable motor, so that liquid contained in the rotating cylinder is set to rotate at a set speed, the flow speed, the temperature and the stress action of the outer wall face of the cold finger cylinder are the same, the flowing state of actual pipeline wax oil flow under different conditions can be simulated, a better pipeline surface paraffin removal effect is achieved, and paraffin removal rules under different temperature and different revolution conditions are obtained.
The technical scheme of the invention is further explained by combining the drawings and the embodiment:
drawings
FIG. 1 is a diagram of a structure of a wax removal apparatus incorporating the experimental method of wax removal of the present invention;
FIG. 2 is a schematic structural view of an arrangement of a cold finger cylinder and a coil pipe;
FIG. 3 is a schematic diagram of the arrangement of the rotary drum and the tray;
FIG. 4 is a schematic view of a thermostatic water bath.
Detailed Description
As shown in fig. 1-4, a wax removal experimental method based on in-situ utilization of asphaltenes includes the following steps:
1) Wax removing equipment for assembling
Placing a tray 8 in a constant-temperature water bath 3, wherein the tray 8 is connected with the output end of an adjustable-speed motor 5 through a bottom shaft of the tray, the adjustable-speed motor 5 is connected with a frequency converter 6, the shaft and the constant-temperature water bath 3 are sealed, a water inlet of the constant-temperature water bath 3 is connected with an outlet of a constant-temperature water bath instrument 7 through a pipeline 10, and a water outlet of the constant-temperature water bath 3 is connected with an inlet of the constant-temperature water bath instrument 7 through the pipeline 10;
fixing a coil pipe 11 inside a cold finger cylinder 1, wherein the coil pipe 11 and the cold finger cylinder 1 form an inner cavity 12, then fixing a wax layer on the outer side surface of the cold finger cylinder 1, the upper end and the lower end of the cold finger cylinder 1 are closed, joints are led out from the top end of the coil pipe 11 and the top end of the inner cavity 12, an outlet of a cooling water exchanger 4 is connected with the top end joint of the coil pipe 11 through a pipeline 9, and an inlet of the cooling water exchanger 4 is connected with the top end joint of the inner cavity 12 through the pipeline 9;
the bottom of a rotary cylinder 2 with an opening at the upper end and a closed bottom is fixed in the middle of a tray 8, paraffin removal liquid containing asphaltene is filled into an outer cavity 21 formed by the rotary cylinder 2 and a cold finger cylinder 1, and then the cold finger cylinder 1 is fixed in the middle of the rotary cylinder 2.
2) Water is introduced into the cold finger cylinder 1 through a cooling water exchanger 4 to form circulation, and the water in the cold finger cylinder 1 is controlled within a required experiment temperature range;
3) Introducing water into the constant-temperature water tank 3 through the constant-temperature water bath instrument 7 to form circulation, and controlling the water in the constant-temperature water tank 3 to be in a required experimental temperature range, wherein the experimental temperature is controlled to be above the melting point of paraffin;
4) The motor is started, the frequency is adjusted, the revolution is adjusted, the rotating cylinder 2 is made to rotate at the required experiment revolution, and the paraffin removal experiment under the flowing condition is realized.
Based on the above embodiment, the amount of paraffin removal is obtained by weighing the rotary drum 2 and the paraffin removal liquid before and after the weighing in one example. The precision reading of the tray balance was 0.01.
In another embodiment, the timing is started when the cold finger cylinder 1 is placed into the rotary cylinder 2 until the wax removal experiment is finished, the wax removal time is obtained, and the wax removal rate is calculated.
Based on the scheme, the wax removal rate rules at different temperatures can be measured through a dynamic wax removal experiment; the wax removal rate law of different solvents can be determined. In addition, the wax removal temperature can be fixed, and the wax removal rate rule under the condition of different revolutions can be measured. The paraffin removal liquid is water or a mixed liquid of asphaltene with different masses, methylnaphthalene and water, and the methylnaphthalene is used as a solvent for dissolving the asphaltene.
The wax removal method of the embodiment can be used for carrying out dynamic wax removal experiments under different experimental conditions. The rotating cylinder 2 is driven by the speed-adjustable motor 5, liquid in the rotating cylinder 2 obtains a rotating speed, so that the flow speed, the temperature and the stress action of the outer wall surface of the cold finger cylinder 1 are the same, the flowing state of actual pipeline oil flow under different conditions can be simulated, and a better paraffin removal effect is achieved.
Based on the above concept, the following embodiments are further described:
example 1, a cold finger cylinder 1 stained with a paraffin layer was set to a predetermined experimental temperature by a cooling water exchanger 4; heating the constant-temperature water tank 3 to a preset experimental temperature by a constant-temperature water bath instrument 7, wherein the experimental temperature is higher than the melting point of paraffin; weighing the rotary cylinder 2 and the internal liquid, and putting the rotary cylinder and the internal liquid into a tray 8; putting the cold finger cylinder 1 into the rotary cylinder 2, starting the speed-adjustable motor 5, setting a certain experimental revolution, recording time, observing the thickness of a wax layer on the outer surface of the cold finger cylinder 1 until no obvious wax layer exists on the surface of the cold finger cylinder 1, and stopping the experiment; and weighing the weight of the rotary cylinder 2 and the liquid in the rotary cylinder to obtain the weight difference, and calculating the paraffin removal rate. Wax removal experiments at different temperatures are carried out, and the wax removal change rule is analyzed.
The specific experimental data are as follows:
influence of temperature on the wax removal rate law.
In the paraffin removal process, the higher the temperature of paraffin removal liquid (taking water as an example), the faster the paraffin removal rate is, and the better the paraffin removal effect is. Table 1 shows the dynamic paraffin removal experiments at temperatures of 55 deg.C, 60 deg.C, 65 deg.C, 70 deg.C and 75 deg.C.
Table 1 shows the parameters of the paraffin removal experiments at temperatures of 55 deg.C, 60 deg.C, 65 deg.C, 70 deg.C and 75 deg.C
As can be seen from the above table, the higher the temperature provided by the constant temperature water tank to the rotary drum at the same revolution, the faster the wax layer on the cold finger drum melts, the faster the paraffin removal rate, and the more obvious the effect is.
Example 2, the cold finger cylinder 1 stained with paraffin layer was set to a predetermined experimental temperature by a cooling water exchanger 4; heating the constant-temperature water tank 3 to a preset experimental temperature by a constant-temperature water bath instrument 7, wherein the experimental temperature is higher than the melting point of paraffin; weighing the rotating cylinder 2 and the asphaltene, the methylnaphthalene and the water in different proportions inside the rotating cylinder, and putting the rotating cylinder and the water into a tray 8; putting the cold finger cylinder 1 into the rotary cylinder 2, starting the speed-adjustable motor 5, setting a certain number of revolutions, recording time, observing the thickness of a wax layer on the outer surface of the cold finger cylinder 1 until no obvious wax layer is formed on the surface of the cold finger cylinder 1, and stopping the experiment; and weighing the rotating cylinder 2 and the asphaltene, the methylnaphthalene and the water in different proportions in the rotating cylinder to obtain the weight difference, and calculating the paraffin removal rate. Wax removal experiments at different temperatures were performed, and the wax removal change law was analyzed.
The specific experimental data are as follows:
influence of asphaltene concentration on the wax removal rate law.
Preparing asphaltene: the paraffin removal solvent comprises 1:20 of methylnaphthalene, wherein in the paraffin removal process, when the mass percentage concentration of asphaltene is lower than 3.5%, the higher the concentration is, the faster the paraffin removal rate is, and the better the paraffin removal effect is; when the asphaltene mass percent concentration is higher than 3.5%, the paraffin removal rate decreases. Table 2 shows the dynamic paraffin removal experiments at concentrations of 1.5%, 2.5%, 3.5%, 4%, 4.5%.
Table 2 shows the parameters of the paraffin removal experiments at concentrations of 1.5%, 2.5%, 3.5%, 4%, 4.5%
As can be seen from the above table, under the same other conditions and different asphaltene concentrations, when the asphaltene concentration is lower than 3.5%, the wax layer on the cold finger cylinder is melted more quickly, the paraffin removal rate is increased, and the effect is more obvious; when the mass concentration of the asphaltene is higher than 3.5%, the melting of the wax layer on the cold finger cylinder is slowed down, and the paraffin removal rate is reduced.
Example 3 comparative experiment
Table 3 shows the paraffin removal rate with and without asphaltenes
As can be seen from Table 3, in the paraffin removal process, when the asphaltene concentration is lower than 3.5%, the higher the asphaltene concentration is, the higher the increase rate of the paraffin removal rate is, and the better the paraffin removal effect is; when the asphaltene concentration is higher than 3.5%, the increase rate of the paraffin removal rate is significantly reduced.
In the above embodiment, the combined paraffin removal device may specifically be that the cold finger cylinder 1 is in a cylindrical shape and is sealed up and down, in order to ensure that the cold finger cylinder 1 is reliable and stable, the cold finger cylinder 1 is connected with the rotary cylinder 2 through a horizontal supporting plate at the top, the coil 11 is a coiled pipe or a spiral pipe, the coiled pipe and the inner cavity 12 are connected with an inlet and an outlet of the cooling water exchanger 4 through the pipeline 9 to control the surface temperature of the cold finger cylinder 1, in the above embodiments 1 to 3, the diameter of the cold finger cylinder 1 is 53mm, the height is 200mm, the diameter of the coiled pipe is 10mm, the height is 180mm, the cold finger cylinder is connected with the cooling water exchanger 4 through the pipeline 9, the length of the pipeline 9 is 1500mm, the diameter is 10mm, the cooling water exchanger 4 controls the temperatures of the coil 11 and the water in the pipeline 9, and further ensures that the temperature of the cold finger cylinder 1 is within a predetermined experimental temperature range.
As shown in fig. 3, rotatory section of thick bamboo 2 is cylindricly, and the material is organic glass, and the lower extreme is sealed, and the upper end is uncovered, bears by tray 8, in order to guarantee that rotatory section of thick bamboo 2 is reliable and stable, at a plurality of poles of 8 upper surfaces of tray along the fixed of circumference, a plurality of poles form the ring, and the embedding of rotatory section of thick bamboo 2 is by radial fixed in annular rod circle, and tray 8 links to each other through the output of axle with adjustable speed motor 5, constant temperature basin 3 and the formation of rotatory section of thick bamboo 2 hold cavity 31, hold the interior water that drains of cavity 31, optionally, adjustable speed motor 5 is connected with converter 6, realizes different revolutions through setting for different frequencies, and then controls the interior fluidic shearing force degree that receives of rotatory section of thick bamboo 2. In the above embodiments 1 to 3, the diameter of the rotary drum 2 is 150mm, the height thereof is 200mm, the diameter of the tray 8 is 160mm, and the height thereof is 15mm, and the adjustable-speed motor 5 drives the rotary drum 2 to rotate at a desired experimental frequency, so that the fluid inside the rotary drum 2 flows at a certain rotation speed.
As shown in fig. 4, the thermostatic water bath 3 is a cuboid, the bottom of the thermostatic water bath is designed to be a stainless steel plate, the left and right opposite side surfaces of the thermostatic water bath are stainless steel plates, the front and back opposite side surfaces of the thermostatic water bath are organic glass plates, the stainless steel plates and the organic glass plates are hermetically connected (for example, by bonding heat-resistant silicone glass glue), and the organic glass is designed to facilitate observation of internal change conditions. The thermostatic water tank 3 is provided with water inlet and outlet ports at two sides, is connected with the thermostatic waterbath instrument 7 through the pipeline 10, and controls the temperature of water in the thermostatic water tank by adjusting the temperature of the thermostatic waterbath instrument 7, in the above embodiments 1-3, the length of the thermostatic water tank 3 is 300mm, the width is 300mm, and the height is 500mm.
The present invention is not limited to the above embodiments, and any person skilled in the art can make various changes and modifications to the above-described structures and technical contents without departing from the technical scope of the present invention.
Claims (9)
1. A paraffin removal experimental method based on in-situ utilization of asphaltene is characterized by comprising the following steps: comprises the following steps:
1) Wax removing equipment for assembling
The tray (8) is placed in the constant-temperature water bath (3), the tray (8) is connected with the output end of an adjustable-speed motor (5) through a bottom shaft of the tray, the adjustable-speed motor (5) is connected with a frequency converter (6), the shaft and the constant-temperature water bath (3) are well sealed, a water inlet of the constant-temperature water bath (3) is connected with an outlet of a constant-temperature water bath instrument (7) through a pipeline (10), and a water outlet of the constant-temperature water bath (3) is connected with an inlet of the constant-temperature water bath instrument (7) through the pipeline (10);
fixing a coil pipe (11) inside a cold finger cylinder (1), wherein the coil pipe (11) and the cold finger cylinder (1) form an inner cavity (12), then fixing a wax layer on the outer side surface of the cold finger cylinder (1), the upper end and the lower end of the cold finger cylinder (1) are sealed, joints are led out from the top end of the coil pipe (11) and the top end of the inner cavity (12), the outlet of a cooling water exchanger (4) is connected with the joint at the top end of the coil pipe (11) through a pipeline (9), and the inlet of the cooling water exchanger (4) is connected with the joint at the top end of the inner cavity (12) through the pipeline (9);
the bottom of a rotating cylinder (2) with an opening at the upper end and a closed bottom is fixed in the middle of a tray (8), paraffin removal liquid containing asphaltene is filled into an outer cavity (21) formed by the rotating cylinder (2) and a cold finger cylinder (1), and then the cold finger cylinder (1) is fixed in the middle of the rotating cylinder (2).
2) Water is introduced into the cold finger cylinder (1) through a cooling water exchanger (4) to form circulation, and the water in the cold finger cylinder (1) is controlled within a required experiment temperature range;
3) Introducing water into the constant-temperature water tank (3) through a constant-temperature water bath instrument (7) to form circulation, and controlling the water in the constant-temperature water tank (3) to be in a required experiment temperature range, wherein the experiment temperature is controlled to be above the melting point of paraffin;
4) The motor is started, the frequency is adjusted, the revolution is adjusted, the rotating cylinder (2) is made to rotate at the required experiment revolution, and the paraffin removal experiment under the flowing condition is realized.
2. The paraffin removal experimental method based on in-situ utilization of the asphaltenes as claimed in claim 1, wherein the method comprises the following steps: the wax removal amount is obtained by weighing the rotary cylinder (2) and the internal wax removal liquid before and after.
3. The paraffin removal experiment method based on in-situ utilization of the asphaltenes as claimed in claim 1, wherein the method comprises the following steps: and starting timing at the moment when the cold finger cylinder (1) is placed into the rotary cylinder (2) until the paraffin removal experiment is finished, obtaining paraffin removal time, and calculating the paraffin removal rate.
4. The paraffin removal experimental method based on in-situ utilization of the asphaltenes as claimed in claim 1 or claim 2, wherein: the paraffin removal liquid is a mixed liquid of asphaltene, methylnaphthalene and water with different masses.
5. The paraffin removal experimental method based on in-situ utilization of the asphaltenes as claimed in claim 1, wherein the method comprises the following steps: the cold finger cylinder (1) and the rotary cylinder (2) are both cylindrical.
6. The paraffin removal experimental method based on the in-situ utilization of the asphaltenes as claimed in claim 1 or 2, wherein: the cold finger cylinder (1) is a stainless steel cylinder.
7. The paraffin removal experimental method based on in-situ utilization of asphaltenes as claimed in claim 3, wherein: the rotary cylinder (2) is made of organic glass.
8. The paraffin removal experimental method based on in-situ utilization of the asphaltenes as claimed in claim 1, wherein the method comprises the following steps: the coil pipe (11) is a coiled pipe or a spiral pipe.
9. The paraffin removal experimental method based on in-situ utilization of the asphaltenes as claimed in claim 1, wherein the method comprises the following steps: the bottom of the constant-temperature water tank (3) is a stainless steel plate, two opposite side faces of the constant-temperature water tank are the stainless steel plates, the other two opposite side faces of the constant-temperature water tank are organic glass plates, and the stainless steel plates are connected with the organic glass plates in a sealing mode.
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