CN114414779A - High-pressure dissolved gas wax-containing crude oil solubility, viscosity and wax precipitation process measuring device - Google Patents
High-pressure dissolved gas wax-containing crude oil solubility, viscosity and wax precipitation process measuring device Download PDFInfo
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- CN114414779A CN114414779A CN202210069784.8A CN202210069784A CN114414779A CN 114414779 A CN114414779 A CN 114414779A CN 202210069784 A CN202210069784 A CN 202210069784A CN 114414779 A CN114414779 A CN 114414779A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; viscous liquids; paints; inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2823—Oils, i.e. hydrocarbon liquids raw oil, drilling fluid or polyphasic mixtures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; viscous liquids; paints; inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2835—Oils, i.e. hydrocarbon liquids specific substances contained in the oil or fuel
Abstract
The invention relates to a device for measuring the solubility, viscosity and wax precipitation process of high-pressure dissolved gas wax-containing crude oil, which consists of a high-pressure reaction kettle, a water bath heat-insulating layer, a high-definition probe, a probe lamp, an electric stirrer, two gas pumps, a screw pump, an absolute pressure transmitter, a temperature transmitter, a sealed transparent semicircular pipe, an I-shaped semicircular neodymium iron boron magnet, a Y-shaped tee joint, a vortex-shaped and annular gas diffuser, a computer terminal and data acquisition and analysis equipment. This device is through injecting the natural gas into high pressure batch autoclave, makes it fully and evenly dissolve in the waxy crude oil to dissolve the survey of gas waxy crude oil viscosity and the wax precipitation process under the different solubilities. The viscosity can be measured by the torque of the rotor at different rotating speeds, the solubility can be calculated by differential pressure, and the wax analysis process can be observed in the sealed transparent semicircular tube. The invention can measure the solubility, viscosity and wax precipitation process of the crude oil containing wax and the relationship between the solubility, the viscosity and the wax precipitation point.
Description
Technical Field
The invention belongs to the application field of high-pressure reaction kettles, and relates to a multifunctional high-pressure reaction kettle capable of efficiently measuring the solubility and viscosity of wax-containing crude oil and a wax precipitation process.
Background
The crude oil produced in China contains more high-wax crude oil, and has the characteristics of high condensation point and high wax precipitation point. The flow of the heated crude oil in the pipeline is influenced by the surrounding environment, and the temperature is gradually reduced. When the temperature of the crude oil is lower than the wax precipitation point, wax crystals in the oil product are continuously precipitated. When the wax molecules in the crude oil reach saturation, the wax molecules in the oil flow will move to the pipe wall under the action of molecular diffusion and deposit on the pipe wall. With the increase of time, the deposit on the pipe wall is increased gradually, the flow area of the pipe is reduced, the flow resistance is increased, and the pipe can be blocked in serious cases. Therefore, before carrying out the transportation of the wax-containing crude oil, it is necessary to study the wax precipitation law in the pipeline.
Meanwhile, the viscosity of the waxy crude oil also influences the rheological property of the waxy crude oil, but the viscosity of the waxy crude oil has uncertainty, and as the crude oil is a complex mixture consisting of a plurality of different substances, 3 components (wax, colloid and asphaltene) which have great influence on the rheological property of the crude oil are respectively a set of substances rather than a certain substance with a clear molecular structure, and the size, the form and the structure of wax crystals have uncertainty in two aspects of randomness and ambiguity, so that the wax crystals are difficult to describe accurately. For crude oil from the same production area, the composition and the size, shape and structure of wax crystals are different from one another in the process of pipeline transportation, so that the viscosity of each waxy crude oil must be measured.
The solubility of natural gas in waxy crude oil is an important factor influencing the viscosity and the wax precipitation process, so when the flowing performance and the like of certain waxy crude oil are researched, the relationship among the solubility, the viscosity and the wax precipitation process of the waxy crude oil needs to be analyzed and researched.
Therefore, it is necessary to design a device capable of efficiently measuring the relationship between the solubility and the viscosity and determining the wax precipitation process, so as to obtain the influence degree of the solubility of the waxy crude oil on the viscosity and the wax precipitation process.
Moreover, since wax molecules in the waxy crude oil move to the pipe wall under the action of molecular diffusion and are deposited on the pipe wall, it is also very critical to effectively remove the waxy crude oil in the device after the measurement is completed so as to influence the next measurement as little as possible.
Disclosure of Invention
The invention aims to provide a device for measuring the solubility, viscosity and wax precipitation process of wax-containing crude oil, which can be used for efficiently measuring the solubility, viscosity and wax precipitation process of the wax-containing crude oil.
In order to realize the functions, the technical method of the invention is as follows:
a device for measuring the solubility, viscosity and wax precipitation process of wax-containing crude oil. The device comprises a high-pressure reaction kettle, a water bath heat-insulating layer, a high-definition probe, a probe lamp, a torque and rotation speed sensor, two gas pumps, a screw pump, an absolute pressure transmitter, a temperature transmitter, a sealed transparent oleophobic semicircular pipe, an I-shaped semicircular neodymium iron boron magnet cut into two symmetrical parts, a Y-shaped tee joint, a ball valve, a vortex gas diffuser, an annular gas diffuser, a computer terminal and data acquisition and analysis equipment.
The high-pressure reaction kettle is sealed by a sealing ring, and is compacted by a screw, so that gas cannot leak out, and the measurement result is more accurate; the top of the high-pressure reaction kettle is provided with a torque and speed sensor, a rotor part is arranged on the outer circular surface of the reaction kettle, a lower circular rod and fan blades extend downwards, the two parts are connected in a contactless magnetic transmission mode, an absolute pressure transmitter and a temperature transmitter are arranged at the top of the torque and speed sensor at the rotor part, a motor on the upper portion of the rotor drives the rotor to rotate so as to transmit the rotating speed and the torque, the viscosity can be determined according to the torque at different rotating speeds, and meanwhile, the lower fan blades can be driven to rotate.
The high-pressure reaction kettle is divided into an outer wall surface, a water bath heat insulation layer and an inner wall surface. The outer wall surface is made of stainless steel, the inner wall surface is made of quartz, and the inner wall surface and the outer wall surface have high pressure bearing capacity; the outer wall surface comprises a visual window, so that the condition in the high-pressure reaction kettle can be observed; the water bath heat preservation layer can be controlled by the constant temperature water bath box of reation kettle outer intercommunication.
The side surface of the high-pressure reaction kettle and the round hole at the uppermost part of the same vertical line position of the unpenetrated groove are connected with a hose, the hose is connected with a gas pump, the other end of the gas pump is connected with a Y-shaped tee joint which is respectively communicated with an upper round hole and a lower round hole which are adjacent to the vertical line position of the unpenetrated groove, and the like, wherein the upper round hole is communicated with a sealed transparent oleophobic semicircular pipe, the gas flowing in at high temperature can blow off the waxy crude oil in the semicircular pipe, the lower round hole is communicated with an annular gas diffuser, and the flowing gas can be fully contacted with the waxy crude oil again after flowing through the small hole; the uppermost part of the side surface and the other round hole of the groove unequal vertical line are connected with a screw pump which is used for injecting the wax-containing crude oil into the high-pressure reaction kettle and injecting the wax-containing crude oil into the gasoline cleaning reaction kettle after the measurement is finished; a circular hole at the center of the bottom is upwards connected with a vortex-shaped gas diffuser and downwards connected with a hose, the hose is provided with a ball valve and then connected with a gas pump, natural gas in a gas storage tank can be extracted and injected into a reaction kettle, and the natural gas flows out through the vortex-shaped gas diffuser and can also be fully mixed and contacted with oil gas; a ball valve is also arranged after the round hole at the other eccentric position of the bottom surface is connected with the hose and is used for discharging the wax-containing crude oil after the measurement is finished.
The two symmetrical I-shaped semicircular neodymium iron boron magnets are respectively arranged inside and outside the position which does not penetrate through the groove, one half of the I-shaped semicircular neodymium iron boron magnets are arranged in the groove outside the reaction kettle, the other half of the I-shaped semicircular neodymium iron boron magnets are arranged between the water bath heat preservation layer, the sealed transparent oleophobic semicircular pipe is arranged in the reaction kettle and attached to the inner wall, the portion attached to the inner wall is also provided with the neodymium iron boron magnets, the three parts of the two symmetrical I-shaped semicircular neodymium iron boron magnets and the sealed transparent oleophobic semicircular pipe are separated by a wall surface and are attracted mutually, and the leakage-free magnetic transmission dynamic seal is adopted, so that the I-shaped semicircular neodymium iron boron magnets can move up and down.
The upper part of the seal of the transparent and oleophobic semi-circular tube is of a porous structure, the part close to the seal is a transparent tube, and the part far away from the seal is a neodymium iron boron magnet.
The annular gas diffuser and the vortex gas diffuser are respectively provided with a plurality of small round holes, so that gas can flow out at each position, and the contact area is increased; the gas diffuser is made of quartz, and the annular gas diffuser and the vortex gas diffuser can be respectively welded on the inner side surface and the inner bottom surface of the high-pressure reaction kettle by adopting a quartz glass welding rod.
The top in the high-pressure reaction kettle has a lighting function, the semi-sealed transparent circular tube is pulled upwards to the highest position, and a high-definition probe is arranged at a position vertical to the side surface of the semi-circular tube and connected with a computer terminal, so that the high-definition probe can be used for constantly observing and recording; after the determination of the solubility and the viscosity is finished, the transparent and oleophobic semicircular tube is pulled down and sealed, the transparent and oleophobic semicircular tube is pulled up to a position as high as a high-definition probe after being immersed in the crude oil, the light is turned on, and the wax precipitation process of the wax-containing crude oil at different temperatures can be observed and recorded.
The round holes are connected with the round holes through hoses, and the round holes are connected with the pump through hoses.
The device for measuring the solubility, viscosity and wax precipitation process of the wax-containing crude oil can be used for efficiently measuring the relationship between the solubility and viscosity of the wax-containing crude oil and observing the wax precipitation process of the wax-containing crude oil. After the wax-containing crude oil enters the high-pressure reaction kettle, a motor on the upper part of the torque and rotation speed sensor drives a rotor to rotate, and the viscosity is measured according to the torque at different rotation speeds; measuring differential pressure through an absolute pressure transmitter connected to the rotor, and calculating the solubility according to the differential pressure to obtain the viscosity under the solubility; and (3) pulling down the transparent oleophobic semicircular tube with the sealed opening, immersing the semi-circular tube in the crude oil, pulling up the semi-circular tube to a position as high as a high-definition probe, turning on lamplight, and observing the wax precipitation process of the waxy crude oil by changing the temperature in the high-pressure reaction kettle. Therefore, the method can realize the simultaneous determination of the solubility, viscosity and wax precipitation process of the wax-containing crude oil in one device.
After all the measurements are finished, increasing the temperature of the water bath thermostat to raise the temperature in the high-pressure reaction kettle so that the wax-containing crude oil can be in a flowing state, then opening the ball valve below the round hole at the eccentric position of the bottom so that the wax-containing crude oil can flow out slowly, closing the ball valve after most of the wax-containing crude oil flows out, opening the ball valve and the gas pump below the round hole at the center of the bottom again, pumping natural gas into the high-pressure reaction kettle from the gas storage tank, and flushing out the crude oil in the vortex gas diffuser; after sufficient gas is supplied, closing the bottom ball valve and the gas pump, pumping the gas pump connected with the circular hole on the outer side surface of the reaction kettle and the highest position of the same vertical line of the groove, pumping air from top to bottom by the gas pump, flushing the annular gas diffuser connected with the circular hole on the adjacent lower part of the groove and the residual waxy crude oil in the sealed transparent oleophobic semicircular tube connected with the circular hole on the adjacent upper part of the groove by using gas, injecting gasoline into the high-pressure reaction kettle through the oil injection circular hole on the uppermost part of the side surface to flush the bottom, finally opening the ball valve connected below the eccentric circular hole on the bottom, and flowing out residual liquid, so that the effect of cleaning the inner part of the high-pressure reaction kettle to the maximum extent is achieved, and the influence on the next measurement is reduced; and finally closing each ball valve, the gas pump and the screw pump.
By adopting the technical scheme, the invention has the following advantages:
1. annular gas diffuser and vortex gas diffuser are installed inside the high-pressure reaction kettle, so that the contact area of oil and gas can be effectively increased, natural gas is fully and uniformly dissolved in the wax-containing crude oil, and the solubility of the crude oil is more accurately measured.
2. The torque and rotating speed sensor is connected with an absolute pressure transmitter and a temperature transmitter, and can measure the temperature and the pressure in the reaction kettle in real time; the rotation of the upper rotor can transmit the rotating speed and the torque, and the viscosity of the wax-containing crude oil is effectively measured according to the torque at different rotating speeds.
3. In the natural gas injection process, the pressure in the high-pressure reaction kettle can be gradually changed, and the change relation between the solubility and the viscosity can be obtained by measuring the numerical values of the solubility and the viscosity under a plurality of pressures; when the temperature is changed, the change relation of the solubility and the viscosity at different temperatures can also be obtained.
4. After the process of solubility, viscosity and wax precipitation is measured and is accomplished, the device can effectively clear away inside wax-containing crude oil, reduces the influence to next survey.
Drawings
FIG. 1 is a plan view of the entire apparatus;
FIG. 2 is a schematic perspective view of a high-pressure reactor;
FIG. 3 is a central axis sectional view of a high-pressure reactor;
FIG. 4 is a torque speed sensor diagram;
FIG. 5 is a view of a sealed transparent oleophobic semi-circular tube mounted on the inner wall;
FIG. 6 is a view of an I-shaped semicircular NdFeB magnet mounted in a non-penetrating groove and capable of translating up and down;
FIG. 7 is a view of an annular gas diffuser mounted on the underside of a high pressure reactor;
FIG. 8 is a diagram of a vortex gas diffuser installed at the bottom of a high pressure reactor;
FIG. 9 is a side cross-sectional view of the connection of the NdFeB magnet and the sealed transparent oleophobic semicircular tube at the unpenetrated groove. Wherein: 1. a high-pressure reaction kettle; 2. a torque and rotation speed sensor; 3. sealing a transparent oleophobic semicircular tube; 4. symmetrically divided I-shaped semicircular neodymium iron boron magnets; 5. an annular gas diffuser; 6. a swirl gas diffuser; 7. an air exhaust hole; 8. an air inlet; 9. does not penetrate the groove; 10. an air inlet; 11. an oil outlet; 12. an oil inlet; 13. the outer wall of the high-pressure reaction kettle; 14. a visual window; 15. a water bath heat insulation layer; 16. the inner wall of the high-pressure reaction kettle; 17. a screw; 18. an air inlet; 19. a rotor; 20. a fan blade; 21. turning the head; 22. an oil blow hole; 23. a transparent oleophobic semi-circular tube; 24. a neodymium iron boron magnet; 25. a neodymium iron boron magnet; 26. the groove is connected with the fracture; 27. an air inlet; 28. an air outlet; 29. an air outlet; 30. an air inlet; 31. a gas pump; 32. a gas pump; 33. a screw pump; 34. a ball valve; 35. an oil drum; 36. a gas storage tank; 37. a motor; 38. a Y-shaped tee joint.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The invention relates to a device for measuring the solubility, viscosity and wax precipitation process of wax-containing crude oil, which comprises a high-pressure reaction kettle, a water bath heat-insulating layer, a high-definition probe, a probe lamp, a torque and rotating speed sensor, two gas pumps, a screw pump, an absolute pressure transmitter, a temperature transmitter, a sealed transparent oleophobic semicircular pipe, a Y-shaped tee joint, a ball valve, a vortex gas diffuser, an annular gas diffuser, a computer terminal and data acquisition and analysis equipment. As shown in fig. 2 and fig. 3, a torque and rotation speed sensor 2 (the torque and rotation speed sensor is shown in fig. 4) is installed at the top of a high-pressure reaction kettle 1, a rotor part 19 is arranged on the circular surface of the outer end of the reaction kettle, a lower circular rod and fan blades are arranged in the kettle, and the two parts are in transmission connection by non-contact magnetic force; the circular hole 12 is connected with a screw pump 33 through a hose and used for injecting wax-containing crude oil into the high-pressure reaction kettle; the round hole 7 is connected with a hose, the hose is provided with a ball valve, the ball valve is connected with the gas pump 31 through the hose, the other end of the gas pump is connected with a Y-shaped tee 38, the other two ends of the Y-shaped tee are respectively connected with a ball valve, the two ball valves are respectively communicated with the round hole 8 and the round hole 10 through the hoses, a sealed transparent oleophobic semicircular pipe 3 (the sealed transparent oleophobic semicircular pipe is shown in figure 5) is arranged under the round hole 8, the sealed transparent oleophobic semicircular pipe is pulled upwards to the highest position of the groove and then can be just close to the lower part of the round hole 8, and the round hole 10 is communicated with a round hole 27 of an annular gas diffuser 5 (the annular gas diffuser is shown in figure 7); the bottom circular hole 18 is upwards connected with a circular hole 30 of a vortex-shaped gas diffuser 6 (the vortex-shaped gas diffuser is shown in figure 8), a hose is downwards connected, a ball valve is arranged on the hose, the ball valve is connected with a gas pump 32 through the hose, and natural gas can be injected into the reaction kettle after the ball valve is opened and the gas pump is started; a ball valve is also arranged after the other eccentric round hole 11 on the bottom surface is connected with a hose and is used for discharging wax-containing crude oil after the measurement is finished; the inside and outside of the position which does not penetrate through the groove 9 are respectively provided with an I-shaped semicircular neodymium iron boron magnet 4 (the I-shaped semicircular neodymium iron boron magnet is shown in figure 6) which is divided into two symmetrical blocks, one half of the I-shaped semicircular neodymium iron boron magnet is arranged in the groove outside the reaction kettle, the other half of the I-shaped semicircular neodymium iron boron magnet is arranged between the water bath heat preservation layers, the sealed transparent oleophobic semicircular pipe 3 is arranged in the high-pressure reaction kettle and is attached to the inner wall, the portion attached to the inner wall is also provided with a neodymium iron boron magnet 24, the three parts are attracted by the wall surfaces at intervals, and the leakage-free magnetic transmission dynamic seal is adopted, so that the I-shaped semicircular neodymium iron boron magnet can move up and down (shown in figure 9); the outer wall surface 13 of the reaction kettle is made of stainless steel, the inner wall surface 16 of the reaction kettle is made of quartz, the inner wall and the outer wall of the reaction kettle both have high pressure bearing capacity, and 14 of the reaction kettle is a visual window which can observe the internal condition of the high-pressure reaction kettle; 15 is a water bath heat-insulating layer, and the temperature of the high-pressure reaction kettle can be controlled by communicating the outer layer of the high-pressure reaction kettle with a constant-temperature water bath tank; a sealing ring is arranged on the inner ring of the kettle cover, and the reaction kettle is sealed by using an upper screw 17 and a lower screw 17, so that gas cannot leak out, and the measurement result is more accurate; the torque and speed sensor 2 (as shown in fig. 4) is connected with an absolute pressure transmitter and a temperature transmitter at the position of an upper rotor 19, so that the temperature and pressure in the reaction kettle can be measured, a rotor upper motor 37 is driven to rotate to transmit the rotating speed and torque, the viscosity is measured according to the torque at different rotating speeds, and the turbulent effect can be increased by the rotation of a lower fan blade 20, so that the natural gas can be fully dissolved in the wax-containing crude oil; the upper part of the seal of the sealed transparent oleophobic semicircular tube 3 is provided with a porous structure 22, so that wax-containing crude oil can be cleaned more easily in the process of blowing the tube, the front part 23 of the semicircular tube is a transparent tube and is used for observing the wax analysis process, and the rear part 24 of the semicircular tube is a neodymium iron boron magnet; the annular gas diffuser 5 is provided with a plurality of small round holes 28, and gas can fully contact with crude oil after coming out of the small holes; the vortex gas diffuser 6 is also provided with a plurality of small holes 29, so that the oil-gas contact area can be effectively increased; the gas diffusers are made of quartz materials, and the annular gas diffuser and the vortex gas diffuser are welded on the inner side surface and the inner bottom of the high-pressure reaction kettle respectively by adopting quartz glass welding rods; the high-pressure reaction kettle has a lighting function, the semi-sealed transparent circular tube 3 is pulled upwards to the highest position, and a high-definition probe is arranged at a position vertical to the side surface of the circular tube and connected with a computer terminal, so that the wax precipitation process in the sealed transparent circular tube can be observed and recorded at any time; the round holes are connected with the round holes through hoses, and the round holes are connected with the pump through hoses.
When the device is used, firstly, the water bath thermostat is opened, the inner part of the high-pressure reaction kettle is heated to a certain temperature, and then the heated wax-containing crude oil is extracted by the screw pump 33 from the upper round hole 12 and enters the high-pressure reaction kettle; the motor 37 at the upper part of the torque rotating speed sensor 2 is turned on, so that after the rotor 19 rotates, the lower fan blades 20 are driven by magnetic force to rotate, the turbulence effect of the crude oil in the rotor is increased, and the gas can be fully dissolved; then, a temperature transmitter and an absolute pressure transmitter which are connected with a rotor 19 on the upper part of the torque and rotation speed sensor 2 are opened, and the pressure and temperature change conditions in the high-pressure reaction kettle are measured in real time; then the ball valve connected with the bottom 18 of the high-pressure reaction kettle is opened, the gas pump 32 connected with the ball valve is opened at the same time, the natural gas flows in from the bottom of the high-pressure reaction kettle through the gas storage tank 36, flows out after flowing through each round hole 29 of the vortex-shaped gas diffuser 6, and is fully contacted with the crude oil, after the high-pressure reaction kettle reaches a certain pressure, the ball valve and the gas pump are closed, two ball valves and the gas pump 31 connected with a Y-shaped tee joint 38 between a round hole 7 on the side surface of the high-pressure reaction kettle and a round hole 10 are opened, the gas is pumped to the Y-shaped tee joint from the upper part through the gas pump, one part of the gas flows through the round hole 8 and is used for flushing away a small part of the wax-containing crude oil in the sealed transparent semicircular pipe 3 (the sealed transparent semicircular pipe is pulled up to the top in the last wax analysis process and most of the wax-containing crude oil is completely blown away after the last measurement is completed), the other part flows through the round hole 10 and flows out from the annular gas diffuser 5 on the side surface of the bottom, the oil gas is fully contacted; then, the viscosity is measured according to the torque at different rotating speeds when the rotor 19 rotates; in the process that gas enters the high-pressure reaction kettle, differential pressure can be measured by an absolute pressure transmitter, the solubility of crude oil can be calculated through the differential pressure, and the change relation between the solubility and the viscosity under different pressures can be obtained; pulling down the sealed transparent oleophobic semicircular tube, immersing the sealed transparent oleophobic semicircular tube in the crude oil, then pulling up the sealed transparent oleophobic semicircular tube to a position as high as a high-definition probe, turning on light, and observing and recording the wax precipitation process of the wax-containing crude oil by changing the temperature of the outer-layer water bath; thereby realizing the process of simultaneously measuring the solubility and the viscosity of the wax-containing crude oil and separating out the wax in one device.
After all the measurements are finished, the temperature of the water bath thermostat is increased to raise the temperature in the high-pressure reaction kettle, so that the wax-containing crude oil is in a flowing state, then the ball valve below the circular hole 11 at the bottom is opened, the wax-containing crude oil can slowly flow out, after most of the wax-containing crude oil flows out, the ball valve is closed, the ball valve and the gas pump 32 below the circular hole 18 are opened again to flush out the crude oil in the vortex-shaped gas diffuser 6, the gas pump 31 between the circular hole 7 at the side surface and the circular hole 10 is opened after sufficient gas is supplied, the gas circulates from top to bottom to flush the wax-containing crude oil in the annular gas diffuser 5 and the sealed transparent oleophobic semicircular pipe 3 to the bottom of the high-pressure reaction kettle, and then the gasoline is injected into the high-pressure reaction kettle through the circular hole 12 to flush the reaction kettle; then, opening a ball valve at the lower part of the round hole 11, and flowing out residual liquid, so that the effect of cleaning the interior of the high-pressure reaction kettle to the maximum extent is achieved, and the influence on the next measurement is reduced; and finally, closing each ball valve, the gas pump and the screw pump, and completing the measurement of the device on the solubility, viscosity and wax precipitation process of the wax-containing crude oil.
Claims (4)
1. The utility model provides a high pressure dissolved gas wax-bearing crude oil solubility, viscosity and wax precipitation process survey device, adopts the method that can high-efficient survey wax-bearing crude oil solubility, viscosity and wax precipitation process, its characterized in that: the device comprises a high-pressure reaction kettle, a water bath heat-insulating layer, a high-definition probe, a probe lamp, a torque and rotation speed sensor, two gas pumps, a screw pump, an absolute pressure transmitter, a temperature transmitter, a sealed transparent and oleophobic semicircular pipe, a Y-shaped tee joint, a ball valve, a vortex gas diffuser, an annular gas diffuser, a computer terminal and data acquisition and analysis equipment; the top of the high-pressure reaction kettle 1 is provided with a torque and rotating speed sensor 2, a rotor part 19 is arranged on the outer end circular surface of the reaction kettle, a lower circular rod and a fan blade extend downwards, and the two parts are connected in a non-contact magnetic transmission way; the circular hole 12 is connected with a screw pump, and wax-containing crude oil can be injected into the high-pressure reaction kettle; the circular hole 7 is connected with a hose, the other end of the hose is connected with a gas pump, the other end of the gas pump is connected with a Y-shaped tee joint, the other two ends of the tee joint are respectively connected with a ball valve and are respectively communicated with the circular hole 8 and the circular hole 10 through the hose, a sealed transparent oleophobic semicircular pipe 3 is arranged under the circular hole 8, the sealed transparent oleophobic semicircular pipe is pulled upwards to the highest position of the groove and then can be just close to the lower part of the circular hole 8, and the circular hole 10 is communicated with a circular hole 27 of the annular gas diffuser 5; the bottom circular hole 18 is upwards connected with a circular hole 30 of the vortex-shaped gas diffuser 6, a hose is downwards connected with the circular hole, a ball valve is arranged on the hose and then connected with a gas pump, and natural gas can be injected into the reaction kettle after the ball valve is opened and the gas pump is started; a ball valve is also arranged after another round hole 11 on the bottom surface is connected with a hose and is used for discharging the wax-containing crude oil after the measurement is finished; the inside and the outside of the non-penetrating groove 9 are respectively provided with an I-shaped semicircular neodymium iron boron magnet 4 which is divided into two symmetrical parts, the leakage-free magnetic transmission dynamic seal is adopted, the part 24 of the sealing transparent semicircular tube 3, which is attached to the inner wall, is also a neodymium iron boron magnet, and the three parts are mutually attracted by the wall surfaces at intervals and can simultaneously move up and down; the outer wall surface 13 of the reaction kettle is made of stainless steel, the inner wall surface 16 of the reaction kettle is made of quartz, the inner wall and the outer wall of the reaction kettle both have high pressure bearing capacity, and 14 of the reaction kettle is a visual window which can observe the internal condition of the high-pressure reaction kettle; 15 is a water bath heat-insulating layer, and the temperature of the reaction kettle can be controlled by communicating the outer layer of the reaction kettle with a constant-temperature water bath tank; a sealing ring is arranged on the inner ring of the kettle cover, and the reaction kettle is sealed by using the upper and lower screws 17, so that gas cannot leak out, and the measurement result is more accurate; the upper rotor 19 of the torque and rotation speed sensor 2 is connected with an absolute pressure transmitter and a temperature transmitter, so that the temperature and the pressure in the reaction kettle can be measured, the motor drives the reaction kettle to rotate so as to transmit the rotation speed and the torque, the viscosity is measured according to the torque at different rotation speeds, and the turbulence effect can be increased by rotating the lower fan blade 20, so that the natural gas can be fully dissolved in the wax-containing crude oil; the upper part of the seal of the sealed transparent oleophobic semicircular tube 3 is provided with a porous structure 22, so that wax-containing crude oil can be cleaned more easily in the process of blowing the tube, the front part 23 of the semicircular tube is a transparent tube and is used for observing the wax analysis process, and the rear part 24 of the semicircular tube is a neodymium iron boron magnet; the annular gas diffuser 5 is provided with a plurality of small round holes 28, and gas can fully contact with crude oil after coming out of the small holes; the vortex gas diffuser 6 is also provided with a plurality of small holes 29, so that the oil-gas contact area can be effectively increased; the gas diffusers are made of quartz materials, and the annular gas diffuser and the vortex gas diffuser are welded on the inner side surface and the inner bottom of the high-pressure reaction kettle respectively by adopting quartz glass welding rods; the high-pressure reaction kettle has a lighting function, the semi-sealed transparent circular tube is pulled upwards to the highest position, and a high-definition probe is arranged at a position vertical to the side surface of the circular tube and connected with a computer terminal, so that real-time observation and recording can be carried out; the round holes are connected with the round holes through hoses, and the round holes are connected with the pump through hoses.
2. The device for measuring the solubility, viscosity and wax precipitation process of the high-pressure dissolved gas wax-containing crude oil as claimed in claim 1 is characterized in that: when the device is used, firstly, the water bath thermostat is opened, the inner part of the high-pressure reaction kettle is heated to a certain temperature, and then the heated wax-containing crude oil is extracted by the screw pump 33 from the upper round hole 12 and enters the high-pressure reaction kettle; the motor 37 at the upper part of the torque rotating speed sensor 2 is turned on, so that after the rotor 19 rotates, the lower fan blades 20 are driven by magnetic force to rotate, the turbulence effect of the crude oil in the rotor is increased, and the oil gas can be fully dissolved; then, a temperature transmitter and an absolute pressure transmitter which are connected with a rotor 19 on the upper part of the torque and rotation speed sensor 2 are opened, and the pressure and temperature change conditions in the high-pressure reaction kettle are measured in real time; then opening the ball valve connected with the bottom 18 of the high-pressure reaction kettle, simultaneously opening the gas pump 32 connected with the ball valve, leading the natural gas to flow in from the bottom of the high-pressure reaction kettle through the gas storage tank 36, flowing through each round hole 29 of the vortex-shaped gas diffuser 6 and then flowing out, and fully contacting with the crude oil; after a certain pressure is reached in the high-pressure reaction kettle, closing the ball valve and the gas pump, opening two ball valves and a gas pump 31 which are connected with a Y-shaped tee 38 between a round hole 7 on the side surface of the high-pressure reaction kettle and a round hole 10, pumping gas to the Y-shaped tee from the upper part through the gas pump, enabling a part of gas to flow through the round hole 8 and be used for flushing away a small part of wax-containing crude oil in the sealed transparent oleophobic semicircular pipe 3 (the semicircular pipe is pulled up to the top in the last wax analysis process and most of the wax-containing crude oil is completely blown away in the last time after the measurement is completed), enabling the other part of gas to flow through the round hole 10 and flow out from an annular gas diffuser 5 on the side surface of the bottom, and enabling the oil gas to be fully contacted again; then, the viscosity is measured according to the torque at different rotating speeds when the rotor 19 rotates; in the process that gas enters the high-pressure reaction kettle, the pressure at each moment can be measured by an absolute pressure transmitter, and the solubility of the wax-containing crude oil can be calculated through differential pressure, so that the change relation between the solubility and the viscosity under different pressures can be obtained.
3. The device for measuring the solubility, viscosity and wax precipitation process of the high-pressure dissolved gas wax-containing crude oil as claimed in claim 1 is characterized in that: under the combined action of the annular gas diffuser 5, the vortex gas diffuser 6 and the torque and rotation speed sensor 2, the crude oil and the gas can be fully dissolved, and the solubility and the viscosity of the wax-containing crude oil under high pressure can be measured most accurately.
4. The device for measuring the solubility, viscosity and wax precipitation process of the high-pressure dissolved gas wax-containing crude oil as claimed in claim 1 is characterized in that: after the solubility and the viscosity are measured, the sealed transparent oleophobic semicircular tube 3 can be pulled down to obtain the waxy crude oil, then the waxy crude oil is pulled up to the highest position which does not penetrate through the groove 9, the exploring lamp and the high-definition probe are opened, the temperature in the reaction kettle is changed, the wax precipitation process of the waxy crude oil under the solubility can be directly observed in the high-pressure reaction kettle, and the measurement of the solubility, the viscosity and the wax precipitation process of the waxy crude oil by the same device is realized.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116908409A (en) * | 2023-07-13 | 2023-10-20 | 中国石油大学(华东) | Device and method for predicting, treating and evaluating solid-phase deposition of ultra-deep condensate gas reservoir shaft |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1073809A (en) * | 1964-12-24 | 1967-06-28 | Shell Int Research | Process for the separation of a wax-containing mixture |
| US20150099675A1 (en) * | 2013-10-03 | 2015-04-09 | Exxonmobil Research And Engineering Company | Compositions with improved varnish control properties |
| US20150219614A1 (en) * | 2012-06-22 | 2015-08-06 | Baker Hughes Incorporated | Methods of determining crude oil stability |
| CN105759015A (en) * | 2016-03-31 | 2016-07-13 | 华南理工大学 | Device and method for online measurement of gas injection crude oil volume factor and solubility |
| WO2017080353A1 (en) * | 2015-11-12 | 2017-05-18 | 中国科学院广州能源研究所 | Device for testing characteristics of sand production during mining of natural gas hydrate |
| CN206208627U (en) * | 2016-12-10 | 2017-05-31 | 中国石油大学(华东) | A kind of dissolved gas crude oil is prepared and solubility measurement apparatus |
| CN106814177A (en) * | 2016-12-19 | 2017-06-09 | 中国石油天然气股份有限公司 | The test device and method of a kind of gas physical parameter in super-viscous oil |
| CN109339739A (en) * | 2018-12-10 | 2019-02-15 | 武汉富世达能源科技股份有限公司 | A kind of efficient wax-proof anti-scaling increasing liquid device |
| CN209894632U (en) * | 2019-05-16 | 2020-01-03 | 张晓� | A testing arrangement for containing wax crude oil wax deposition characteristic |
| CN111175167A (en) * | 2020-02-20 | 2020-05-19 | 西南石油大学 | Wax deposition characteristic and pipe flow characteristic simulation experiment device for wax-containing crude oil |
| US10942105B1 (en) * | 2019-12-31 | 2021-03-09 | Southwest Petroleum University | Experimental device for carbon dioxide imbition, diffusion and oil discharge in tight oil reservoir |
| CN212674707U (en) * | 2020-07-08 | 2021-03-09 | 承德石油高等专科学校 | High-efficient preparation of gas-dissolved crude oil and viscosity measurement device |
| JP2021042180A (en) * | 2019-09-13 | 2021-03-18 | 旭化成ワッカーシリコーン株式会社 | Oil-in-water emulsion composition containing amino-modified silicone suppressing change in color tone, production method and design method of the same and cosmetic blended with the composition |
| CN113533147A (en) * | 2021-07-16 | 2021-10-22 | 西南石油大学 | Device and method for measuring wax precipitation condition of micro-wax-containing natural gas |
-
2022
- 2022-01-21 CN CN202210069784.8A patent/CN114414779B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1073809A (en) * | 1964-12-24 | 1967-06-28 | Shell Int Research | Process for the separation of a wax-containing mixture |
| US20150219614A1 (en) * | 2012-06-22 | 2015-08-06 | Baker Hughes Incorporated | Methods of determining crude oil stability |
| US20150099675A1 (en) * | 2013-10-03 | 2015-04-09 | Exxonmobil Research And Engineering Company | Compositions with improved varnish control properties |
| WO2017080353A1 (en) * | 2015-11-12 | 2017-05-18 | 中国科学院广州能源研究所 | Device for testing characteristics of sand production during mining of natural gas hydrate |
| CN105759015A (en) * | 2016-03-31 | 2016-07-13 | 华南理工大学 | Device and method for online measurement of gas injection crude oil volume factor and solubility |
| CN206208627U (en) * | 2016-12-10 | 2017-05-31 | 中国石油大学(华东) | A kind of dissolved gas crude oil is prepared and solubility measurement apparatus |
| CN106814177A (en) * | 2016-12-19 | 2017-06-09 | 中国石油天然气股份有限公司 | The test device and method of a kind of gas physical parameter in super-viscous oil |
| CN109339739A (en) * | 2018-12-10 | 2019-02-15 | 武汉富世达能源科技股份有限公司 | A kind of efficient wax-proof anti-scaling increasing liquid device |
| CN209894632U (en) * | 2019-05-16 | 2020-01-03 | 张晓� | A testing arrangement for containing wax crude oil wax deposition characteristic |
| JP2021042180A (en) * | 2019-09-13 | 2021-03-18 | 旭化成ワッカーシリコーン株式会社 | Oil-in-water emulsion composition containing amino-modified silicone suppressing change in color tone, production method and design method of the same and cosmetic blended with the composition |
| US10942105B1 (en) * | 2019-12-31 | 2021-03-09 | Southwest Petroleum University | Experimental device for carbon dioxide imbition, diffusion and oil discharge in tight oil reservoir |
| CN111175167A (en) * | 2020-02-20 | 2020-05-19 | 西南石油大学 | Wax deposition characteristic and pipe flow characteristic simulation experiment device for wax-containing crude oil |
| CN212674707U (en) * | 2020-07-08 | 2021-03-09 | 承德石油高等专科学校 | High-efficient preparation of gas-dissolved crude oil and viscosity measurement device |
| CN113533147A (en) * | 2021-07-16 | 2021-10-22 | 西南石油大学 | Device and method for measuring wax precipitation condition of micro-wax-containing natural gas |
Non-Patent Citations (4)
| Title |
|---|
| HANYONG LI: "Gas solubility measurement for waxy crude oil saturated with nitrogen and natural gas", ADVANCED MATERIALS RESEARCH, pages 603 - 606 * |
| JIAQIANG JING等: "Viscosity and contact angle prediction of low water-containing heavy crude oil diluted with light oil", JOURNAL OF PETROLEUM SCIENCE AND ENGINEERIN, pages 1121 - 1134 * |
| 敬加强等: "油水不相溶体系流变特性探讨", 油田化学, vol. 33, no. 1, pages 170 - 175 * |
| 龙震: "溶气含税原油流动性研究", 中国优秀博硕士学位论文全文数据库（硕士）工程科技I辑, pages 019 - 755 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116908409A (en) * | 2023-07-13 | 2023-10-20 | 中国石油大学(华东) | Device and method for predicting, treating and evaluating solid-phase deposition of ultra-deep condensate gas reservoir shaft |
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