A pilot test device for high-pressure electrostatic modification of crude oil

Abstract

A kind of pilot test device of crude oil high-pressure electrostatic modification, its characterized in that, the pilot test device of crude oil high-pressure electrostatic modification is pry dress, crude oil high-pressure electrostatic modification pilot test device is arranged on the top of mobile chassis, the pilot test device of crude oil high-pressure electrostatic modification includes detection table, thermostatic component, stirred tank, delivery pump, high-pressure processor, high-voltage power supply, crude oil collector, control electric box and solenoid valve, the thermostatic component, stirred tank, delivery pump, high-pressure processor and crude oil collector are sequentially connected in series, by using pry dress of crude oil high-pressure modification experimental device, to facilitate in each viscosity or content different oil pipeline, and three different forms of high-pressure processor also improves the variable situation of test, analyzes the actual use effect of various forms of high-pressure processor, improves the test efficiency of experimental device as a whole.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of crude oil modification pilot, and particularly relates to a pilot test device for high-pressure electrostatic modification of crude oil. BACKGROUND

[0002] The exploitation and transportation of high-viscosity heavy crude oil have great technical limitations. Due to the high content of paraffin, resin and asphaltene in high-viscosity crude oil, the flowability thereof is poor, and thus some physical or chemical methods are generally adopted to modify or modify the oil to reduce the viscosity and improve the flowability. So far, the methods for reducing viscosity adopted by oilfields in the exploitation and gathering process mainly include heating transportation process, adding chemical agents for viscosity reduction and transportation process, mixing thin oil for viscosity reduction and transportation process, and modification for viscosity reduction and transportation process. In addition, some methods are being developed and explored, such as microbial viscosity reduction, ultrasonic viscosity reduction, microwave viscosity reduction and electric field viscosity reduction.

[0003] In the prior art, the patent number CN210293971U discloses an experimental device for testing the performance of carbon dioxide solubilizing viscosity reducer. A carbon dioxide gas cylinder is connected to a gas storage tank through a booster pump, and then connected to a high-pressure phase equilibrium kettle through the gas storage tank. An additive tank is connected to the high-pressure phase equilibrium kettle through a high-pressure liquid pump, and a crude oil tank is connected to the high-pressure phase equilibrium kettle through a pipeline. The upper output of the high-pressure phase equilibrium kettle is connected to a gas phase collection bottle, and the lower output is connected to a liquid phase collection bottle. Carbon dioxide, thick oil and chemical agents are injected into the high-pressure phase equilibrium kettle, and the output is connected to the gas phase collection bottle and the liquid phase collection bottle. The gas and liquid samples are collected through the two sample collection bottles, the volume of carbon dioxide in the sample is measured by a gas flow meter, the mass of carbon dioxide is calculated, and the solubility is calculated. After multiple tests, the viscosity and flowability of thick oil are significantly improved, and the purpose of improving the recovery rate is achieved.

[0004] In the prior art, the electric field modification viscosity reduction is a relatively advanced novel technology. In simple terms, the electric field modification is to apply a high-voltage electric field with a certain intensity to the crude oil, and the effect of reducing the viscosity and yield stress can be achieved within a few seconds. For some waxy crude oil, the viscosity near the freezing point can be reduced by more than 80%, and the yield stress can be reduced by 90%. The energy consumption is only 1% of the heating energy consumption for achieving the same viscosity reduction rate. This method was first proposed by Tao et al. of Temple University in 2006, and has been supported by many parties and small-scale field tests have been carried out. Subsequently, many scholars have carried out research on the electric field modification of crude oil.

[0005] Among them, QS Energy Company proposed a new type of oil viscosity reduction technology in 2019, which uses high-voltage electric field to force hydrocarbons and other particles in crude oil to chain along the flow direction, thereby significantly reducing viscosity, which can greatly reduce the use of diluent (an additive) in heavy crude oil, thereby increasing production.

[0006] In the November 2021 issue of the 40th volume of the monthly "Oil and Gas Storage and Transportation", the research progress of crude oil electric field modification technology is proposed. The high-voltage electric field (electric field strength greater than 0.2kV / mm) is applied to the flowing or static state of crude oil for several seconds, which can achieve significant immediate viscosity reduction effect. The viscosity reduction rate near the freezing point temperature can reach 90%; electric field treatment has a significant effect on weakening the gelling structure of waxy crude oil, which is beneficial to improve the safety of pipeline shutdown and restart; electric field treatment is efficient and energy-saving, and the energy consumption required for electric field treatment is only 1% of that of heating method; the composition of modified crude oil remains unchanged, and does not affect subsequent refining and processing; the viscosity of electric field modified crude oil gradually rises with the treatment time, and the viscosity reduction effect can last for about 1 day, while the modification effect of gelled crude oil lasts much longer; the modification effect and stability of different crude oils are very different, and the electric field modification technology is not mature enough. The main reason is that the modification effect of different crude oils is different, and the stability of the modification effect needs to be further improved. Although the interface polarization theory can qualitatively explain the current observed crude oil electrorheological behavior, it cannot quantitatively explain the obvious difference in electric field modification effect of different crude oils.

[0007] Therefore, a pilot test device capable of being conveniently prying and connecting to each crude oil pipeline is needed to test the overall process of electric field viscosity reduction, so as to compare different schemes and further study the electric field viscosity reduction technology. SUMMARY

[0008] In order to solve the above problems, a crude oil high pressure electrostatic modification pilot test device is provided, the crude oil high pressure electrostatic modification pilot test device is pry-mounted, the crude oil high pressure electrostatic modification pilot test device is arranged above the movable chassis, the crude oil high pressure electrostatic modification pilot test device comprises a detection table, a constant temperature assembly, a stirred tank, a delivery pump, a high pressure processor, a high voltage power supply, a crude oil collector, a control electric box and a solenoid valve, the constant temperature assembly, the stirred tank, the delivery pump, the high pressure processor and the crude oil collector are connected in series, the constant temperature assembly comprises a heater, a heat exchanger and a straight pipe, the heater, the heat exchanger and the straight pipe are connected in parallel, the oil inlet and the oil outlet of the constant temperature assembly, the outlet end of the stirred tank, the outlet end of the delivery pump and the oil outlet of the high pressure processor are provided with sampling ports, the high pressure processor comprises a vertical processor, a horizontal processor and a barrel processor, the vertical processor, the horizontal processor and the barrel processor are connected in parallel, the outlet ends of the vertical processor, the horizontal processor and the barrel processor are provided with sampling ports, by using the pry-mounted crude oil high pressure modification experimental device, the crude oil can be connected and modified in the experimental pipeline with different viscosities or contents, so that various data under different experimental samples can be obtained, which is convenient for subsequent research and development of mass production equipment, and the three different forms of high pressure processors also improve the variable conditions of the experiment, analyze the actual use effect of various forms of high pressure processors, and improve the overall test efficiency of the test device.

[0009] The movable chassis around the bottom of the crude oil high pressure electrostatic modification pilot test device is provided with a cofferdam, one end of the crude oil high pressure electrostatic modification pilot test device is provided with an inlet end, the other end of the crude oil high pressure electrostatic modification pilot test device is provided with an outlet end, the inlet end and the outlet end are provided with pry-mounted openings, the pry-mounted inlet end is connected with the oil pipeline in communication, the pry-mounted outlet end is connected with the crude oil collector or the oil pipeline in communication, a detection table group is arranged between the inlet end and the constant temperature assembly, the detection table group comprises a pressure gauge, a temperature gauge and a flowmeter, a sampling port is arranged between the constant temperature assembly and the detection table group, the crude oil is directly introduced into the oil pipeline, the pry-mounted device is convenient for testing in various conditions of crude oil, and the introduced crude oil can be directly detected by the detection table group, so as to determine the subsequent test method, or directly introduced into the oil pipeline to realize the modification of the crude oil.

[0010] The constant temperature assembly comprises a heater, a heat exchanger and a straight flow pipe, the heater, the heat exchanger and the straight flow pipe are connected in parallel, the heater is an electric heater, the heat exchanger is in circulation communication with a refrigerating machine, and the oil outlet of the constant temperature assembly is provided with a temperature gauge, the temperature gauge at the oil outlet of the constant temperature assembly and the stirring kettle are provided with a sampling port, the crude oil can be kept at a constant temperature required by the test, the crude oil can be quickly led to the required constant temperature through the three different heaters, heat exchangers and straight flow pipes, the subsequent processing is facilitated, and the temperature for the test can be conveniently adjusted.

[0011] The stirring kettle is a vertical flow circulation type stirring kettle, the upper outer side of the stirring kettle is provided with an oil inlet, the lower outer side of the stirring kettle is provided with an oil outlet, the oil outlet of the stirring kettle is provided with a temperature gauge and a pressure gauge in sequence, the pressure gauge at the oil outlet of the stirring kettle and the delivery pump are provided with a sampling port, the crude oil after stirring in the stirring kettle can be fully mixed with internal impurities and other excess substances, so that the stability of the crude oil during subsequent high-pressure processing is improved.

[0012] The delivery pump is a booster delivery pump, the oil outlet of the delivery pump is provided with a pressure gauge, a temperature gauge and a flow meter in sequence, the flow meter at the oil outlet of the delivery pump and the high-pressure processor are provided with a sampling port, the crude oil after stirring is re-pressurized and accelerated by the delivery pump, so that it can be quickly filled into the high-pressure processor to improve the reaction speed of the crude oil in the high-pressure processor, and the values of the test group are observed and detected again before the crude oil enters the high-pressure processor, so that the crude oil entering the high-pressure processor is the required parameter.

[0013] A plurality of rectangular electric field guide vanes are vertically arranged in the vertical processor, a plurality of circular center electric field guide vanes are horizontally arranged in the horizontal processor, and a plurality of nested cylindrical electric field guide vanes are arranged in the cylindrical processor.

[0014] The two ends of the vertical processor, the horizontal processor and the cylindrical processor are provided with electromagnetic valves, the outer side of the electromagnetic valve at the oil outlet of the vertical processor, the horizontal processor and the cylindrical processor is provided with a sampling port, the parallel connection part of the vertical processor, the horizontal processor and the cylindrical processor is provided with an electromagnetic valve, the total outlet end of the vertical processor, the horizontal processor and the cylindrical processor is provided with a pressure gauge and a temperature gauge in sequence, the positive and negative electrodes of the vertical processor, the horizontal processor and the cylindrical processor are connected with two groups of high-voltage power supplies, the crude oil can be simultaneously introduced into different types of high-pressure processors, or the crude oil can be introduced into only one high-pressure processor, so that various comparison tests can be conveniently made, the variable range is improved, various adjustable high-pressure processing parameters are used, and the effects of various parameters of the crude oil are tested.

[0015] The control electric box is connected with the detection table, the electromagnetic valve, the constant temperature component, the stirring kettle, the conveying pump and the high pressure processor through cables respectively, and the whole experimental device is connected and controlled through the control electric box, so that convenient test control can be realized.

[0016] Beneficial effects:

[0017] By using the pry-mounted crude oil high pressure modification experimental device, the crude oil can be modified in each oil pipeline with different viscosities or contents, so that various data under different experimental samples can be tested, which is convenient for subsequent mass production equipment research and development, and the three different forms of high pressure processors also improve the variable conditions of the test, analyze the actual use effect of various forms of high pressure processors, and improve the overall test efficiency of the test device.

[0018] The crude oil is directly introduced into the oil pipeline, which belongs to pry-mounted and is convenient for testing in various conditions of crude oil, and the introduced crude oil can also be directly detected by the detection table group, so as to determine the subsequent test method or directly introduce the crude oil into the oil pipeline to realize the modification of the crude oil.

[0019] The crude oil is kept at a constant temperature required for the test, and the crude oil can be quickly introduced to the required constant temperature by three different heaters, heat exchangers and straight pipes, which is convenient for subsequent processing and temperature adjustment for testing.

[0020] After stirring, the impurities and other excess substances in the crude oil can be fully mixed, so as to improve the stability of the crude oil during subsequent high pressure processing.

[0021] The conveying pump is used to re-pressurize and speed up the crude oil after stirring and reducing the flow rate, so as to quickly charge it into the high pressure processor to improve the reaction speed of the crude oil in the high pressure processor, and the value of the detection table group is observed again before the crude oil enters the high pressure processor to ensure that the crude oil entering the high pressure processor is the required parameter.

[0022] It can enter different forms of high pressure processors at the same time, or only enter one high pressure processor, which can facilitate various comparative tests and improve the variable range.

[0023] By using various adjustable high pressure processing parameters with high range, the effects of crude oil with various parameters can be tested. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a schematic flow chart of a crude oil high pressure electrostatic modification pilot test device;

[0025] In the figure; 1, oil pipeline, 2, detection table, 3, sampling port, 4, heater, 5, heat exchanger, 6, refrigerator, 7, stirred tank, 8, delivery pump, 9, vertical processor, 10, horizontal processor, 11, barrel processor, 12, high-voltage power supply, 13, crude oil collector, 14, control electric box. DETAILED DESCRIPTION

[0026] In order to deepen the understanding of the present application, the present application will be further described below in conjunction with examples and drawings, which are only used to explain the present application and do not constitute a limitation on the protection scope of the present application.

[0027] Oil pipeline 1, detection table 2, sampling port 3, heater 4, heat exchanger 5, refrigerator 6, stirred tank 7, delivery pump 8, vertical processor 9, horizontal processor 10, barrel processor 11, high-voltage power supply 12, crude oil collector 13, control electric box 14.

[0028] As shown in Figure 1 ;

[0029] The utility model provides a kind of crude oil high pressure electrostatic modification pilot test device, crude oil high pressure electrostatic modification pilot test device is pry dress type, crude oil high pressure electrostatic modification pilot test device is equipped on mobile chassis top, the crude oil high pressure electrostatic modification pilot test device includes detection table 2, thermostat component, stirred tank 7, delivery pump 8, high pressure processor, high voltage power supply 12, crude oil collector 13, control electric box 14 and solenoid valve, the thermostat component, stirred tank 7, delivery pump 8, high pressure processor and crude oil collector 13 are sequentially connected in series, the thermostat component includes heater 4, heat exchanger 5 and direct current pipe, the heater 4, heat exchanger 5 and direct current pipe are connected in parallel with each other, the oil inlet and oil outlet of the thermostat component, the outlet end of stirred tank 7, the outlet end of delivery pump 8 and the oil outlet of high pressure processor are equipped with sampling port 3, the high pressure processor includes vertical processor 9, horizontal processor 10 and barrel processor 11, the vertical processor 9, horizontal processor 10 and barrel processor 11 are connected in parallel with each other, the outlet end of vertical processor 9, horizontal processor 10 and barrel processor 11 is equipped with sampling port 3, the mobile chassis around of crude oil high pressure electrostatic modification pilot test device bottom is equipped with cofferdam, one end of crude oil high pressure electrostatic modification pilot test device is equipped with inlet end, the other end of crude oil high pressure electrostatic modification pilot test device is equipped with outlet end, the inlet end and outlet end are equipped with pry dress mouth, inlet end pry dress type is connected with oil pipeline 1, outlet end pry dress type is connected with crude oil collector 13 or oil pipeline 1, inlet end is equipped with detection table 2 group between thermostat component, the detection table 2 group includes pressure gauge, temperature table and flowmeter, thermostat component and detection table 2 group are equipped with sampling port 3, the thermostat component includes heater 4, heat exchanger 5 and direct current pipe, the heater 4, heat exchanger 5 and direct current pipe are connected in parallel with each other, the both ends of heater 4, heat exchanger 5 and direct current pipe are equipped with solenoid valve, the heater 4 is electric heater 4, the heat exchanger 5 is circularly communicated with refrigerator 6, the oil outlet of the thermostat component is equipped with temperature table, the temperature table of thermostat component oil outlet and stirred tank 7 are equipped with sampling port 3, the stirred tank 7 is vertical flow circulation type stirred tank 7, the upper outer side of stirred tank 7 is equipped with oil inlet, the lower outer side of stirred tank 7 is equipped with oil outlet, the oil outlet of stirred tank 7 is sequentially equipped with temperature table and pressure gauge, the pressure gauge of the oil outlet of stirred tank 7 and delivery pump 8 are equipped with sampling port 3, the delivery pump 8 is booster delivery pump 8, the oil outlet of delivery pump 8 is sequentially equipped with pressure gauge, temperature table and flowmeter, the flowmeter of delivery pump 8 oil outlet and high pressure processor are equipped with sampling port 3, the inside of vertical processor 9 is vertically equipped with a plurality of rectangular electric field guide blades, the inside of horizontal processor 10 is horizontally horizontally equipped with a plurality of central electric field guide blades, the inside of barrel processor 11 is equipped with a plurality of nested cylindrical electric field guide blades, the both ends of vertical processor 9, horizontal processor 10 and barrel processor 11 are equipped with solenoid valve,The outside of the oil outlet electromagnetic valve of the vertical processor 9, the horizontal processor 10 and the barrel processor 11 is provided with a sampling port 3, the parallel connection of the vertical processor 9, the horizontal processor 10 and the barrel processor 11 is provided with an electromagnetic valve, the total outlet end of the vertical processor 9, the horizontal processor 10 and the barrel processor 11 is provided with a pressure gauge and a temperature gauge in sequence, the positive and negative electrodes of the vertical processor 9, the horizontal processor 10 and the barrel processor 11 are connected with two groups of high-voltage power supplies 12 respectively, and the control electric box 14 is connected with the detection gauge 2, the electromagnetic valve, the constant temperature assembly, the stirring kettle 7, the conveying pump 8 and the high-voltage processor through cables respectively.

[0030] Embodiment example

[0031] a. The high-viscosity crude oil enters the detection gauge 2 group through the oil pipeline 1 to detect the parameters of the crude oil.

[0032] b. According to the detected crude oil parameters, the crude oil flows into the constant temperature group of the heater 4, the heat exchanger 5 or the straight-flow pipe to keep the crude oil at a constant temperature required for the test.

[0033] c. The constant-temperature crude oil is input into the stirring kettle 7 for uniform stirring.

[0034] d. The fully stirred crude oil enters the detection gauge 2 group 2 again through the conveying pump 8 to detect the parameters of the stirred crude oil.

[0035] e. According to the detected data, the crude oil is input into different forms of high-voltage processors.

[0036] f. The crude oil enters the high-voltage processor, and the high-voltage processor discharges inside the high-voltage power supply 12 to modify the crude oil.

[0037] g. The modification parameters of the high-voltage processor are adjusted, the power supply voltage range is 50kV-100kV, the field strength range of the high-voltage processor is 1000-3000V / mm, and the modification processing time range is 3-15min.

[0038] h. The modified crude oil flows into the crude oil collector 13, and the modified crude oil is observed and detected.

[0039] The above only describes the preferred embodiments of the present application and should not be used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pilot plant apparatus for high pressure electrostatic modification of crude oil, characterized in that, The crude oil high-voltage electrostatic modification pilot test device is a pry-mounted device, and the crude oil high-voltage electrostatic modification pilot test device is arranged above a mobile base, and the crude oil high-voltage electrostatic modification pilot test device comprises a detection table, a constant temperature assembly, a stirred tank, a delivery pump, a high-voltage processor, a high-voltage power supply, a crude oil collector, a control electric box and an electromagnetic valve, the constant temperature assembly, the stirred tank, the delivery pump, the high-voltage processor and the crude oil collector are sequentially and serially connected, the constant temperature assembly comprises a heater, a heat exchanger and a straight-flow pipe, the heater, the heat exchanger and the straight-flow pipe are connected in parallel with each other, the oil inlet and the oil outlet of the constant temperature assembly, the outlet end of the stirred tank, the outlet end of the delivery pump and the oil outlet of the high-voltage processor are all provided with sampling ports, the high-voltage processor comprises a vertical processor, a horizontal processor and a barrel-type processor, the vertical processor, the horizontal processor and the barrel-type processor are connected in parallel with each other, and the outlet ends of the vertical processor, the horizontal processor and the barrel-type processor are all provided with sampling ports.

2. A pilot plant apparatus for high pressure electrostatic modification of crude oil according to claim 1, characterized in that, The mobile base around the bottom of the crude oil high-voltage electrostatic modification pilot test device is provided with a cofferdam, one end of the crude oil high-voltage electrostatic modification pilot test device is provided with an inlet end, and the other end of the crude oil high-voltage electrostatic modification pilot test device is provided with an outlet end, the inlet end and the outlet end are both provided with pry-mounted openings, the pry-mounted opening of the inlet end is connected in communication with an oil delivery pipeline, and the pry-mounted opening of the outlet end is connected in communication with the crude oil collector or the oil delivery pipeline.

3. A pilot plant apparatus for high voltage electrostatic modification of crude oil according to claim 2, characterized in that, A detection table group is arranged between the inlet end and the constant temperature assembly, the detection table group comprises a pressure gauge, a temperature gauge and a flowmeter, and the constant temperature assembly and the detection table group are provided with sampling ports.

4. The pilot plant apparatus for high voltage electrostatic modification of crude oil according to claim 1, characterized in that, The constant temperature assembly comprises a heater, a heat exchanger and a straight-flow pipe, the heater, the heat exchanger and the straight-flow pipe are connected in parallel with each other, the heater, the heat exchanger and the straight-flow pipe are both provided with electromagnetic valves at both ends, the heater is an electric heater, the heat exchanger is connected in circulation with a refrigerating machine, the oil outlet of the constant temperature assembly is provided with a temperature gauge, and the temperature gauge at the oil outlet of the constant temperature assembly and the stirred tank are provided with sampling ports.

5. A pilot plant apparatus for high voltage electrostatic modification of crude oil according to claim 1, characterized in that, The stirred tank is a vertical flow circulation type stirred tank, the upper portion of the stirred tank is provided with an oil inlet, the lower portion of the stirred tank is provided with an oil outlet, the oil outlet of the stirred tank is sequentially provided with a temperature gauge and a pressure gauge, and the pressure gauge at the oil outlet of the stirred tank and the delivery pump are provided with a sampling port.

6. A pilot plant apparatus for high pressure electrostatic modification of crude oil according to claim 1, characterized in that, The delivery pump is a booster delivery pump, the oil outlet of the delivery pump is sequentially provided with a pressure gauge, a temperature gauge and a flowmeter, and the flowmeter at the oil outlet of the delivery pump and the high-voltage processor are provided with a sampling port.

7. A pilot plant apparatus for high voltage electrostatic modification of crude oil according to claim 1, characterized in that, The vertical processor is internally provided with a plurality of rectangular electric field guide plates in the vertical direction, the horizontal processor is internally provided with a plurality of circular electric field guide plates in the horizontal direction, and the barrel-type processor is internally provided with a plurality of nested cylindrical electric field guide plates.

8. A pilot plant apparatus for high pressure electrostatic modification of crude oil according to claim 1, characterized in that, The vertical processor, the horizontal processor and the barrel-type processor are both provided with electromagnetic valves at both ends, the outer side of the oil outlet electromagnetic valve of the vertical processor, the horizontal processor and the barrel-type processor is provided with a sampling port, the parallel connection positions of the vertical processor, the horizontal processor and the barrel-type processor are all provided with electromagnetic valves, and the total outlet ends of the vertical processor, the horizontal processor and the barrel-type processor are sequentially provided with a pressure gauge and a temperature gauge.

9. A pilot plant apparatus for high voltage electrostatic modification of crude oil according to claim 1, characterized in that, The positive and negative electrodes of the vertical processor, the horizontal processor and the barrel processor are connected with two groups of high-voltage power sources respectively.

10. A pilot plant apparatus for high pressure electrostatic modification of crude oil according to claim 1, characterized in that, The control electric box is connected with the detection table, the electromagnetic valve, the constant temperature component, the stirring kettle, the delivery pump and the high-pressure processor through cables respectively.

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