Electric power assisted high-viscosity foaming crude oil metering method and device

Abstract

The invention relates to the technical field of oil-gas separation metering methods and devices, in particular to a power-assisted high-viscosity bubbling crude oil metering method and device which comprises an oil pipe metering separator, a sleeve metering separator and a base, the oil pipe metering separator and the sleeve metering separator are fixed to the base, and the sleeve metering separator is fixed to the oil pipe metering separator. And an upper liquid inlet of the oil pipe metering separator is fixedly communicated with an oil pipe liquid inlet pipeline. The integrated design is adopted, the integration degree is high, multiple functions are achieved, the occupied area is small, and the on-site construction amount is small. A novel efficient defoaming internal part combination is used for eliminating the'foam effect ', an electric heater is arranged for heating and viscosity reduction of crude oil, accurate metering of liquid amount and gas and automatic liquid discharging are achieved, meanwhile, a gas metering pipeline is arranged at the gas outlet end of a sleeve metering separator, associated gas metering is achieved, and the electric heater is used for heating and viscosity reduction instead of a steam oil pressing mode. The steam consumption in the operation process of the device is reduced, and the natural gas consumption and carbon emission are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of oil-gas separation metering methods and devices, and is an electric-assisted high-viscosity foaming crude oil metering method and device. Background Art

[0002] Fire drive is a way to exploit heavy oil in oil fields. The produced fluid of fire drive is easy to form stable foam with tail gas to produce "foam effect", which makes a false liquid surface appear in the metering separator, making it difficult to control the liquid surface of the metering separator. At the same time, it is easy to cause gas leakage in the oil line of the metering separator or oil leakage in the gas line, resulting in a very large metering error in the metering of the oil well. At the same time, when the liquid in the metering separator cannot be discharged by self-pressure, steam is needed to assist in oil pressure. Due to the demand for green and low-carbon development, steam can only be used to reduce the viscosity of underground crude oil. Summary of the invention

[0003] The present invention provides an electric-assisted high-viscosity foaming crude oil metering method and device, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problem of inaccurate metering and large metering error of conventional volumetric metering devices for measuring high-viscosity foaming crude oil.

[0004] One of the technical solutions of the present invention is achieved by the following measures: an electric-assisted high-viscosity foaming crude oil metering method, comprising separately metering crude oil from the oil pipe and the casing; The crude oil from the oil pipe enters the oil pipe metering separator for gas-liquid separation. During the gas-liquid separation process of the oil pipe metering separator, the crude oil is defoamed by a high-efficiency defoaming internal component combination in the oil pipe metering separator and heated by an electric heater. The foam of the crude oil can be eliminated by the high-efficiency defoaming internal component combination, and the viscosity of the crude oil is reduced by heating to achieve self-drainage after the oil pipe metering separator measures the liquid volume. The crude oil from the casing enters the casing metering separator for gas-liquid separation. During the gas-liquid separation process of the crude oil in the casing metering separator, the crude oil is defoamed by a high-efficiency defoaming internal component combination and heated by an electric heater in the casing metering separator. The foam of the crude oil can be eliminated by the high-efficiency defoaming internal component combination, and the viscosity of the crude oil is reduced by heating to achieve self-drainage after the casing metering separator measures the liquid volume. The crude oil from the casing is discharged after the gas phase separated by the casing metering separator is measured by a flow meter.

[0005] The second technical solution of the present invention is achieved through the following measures: a device for implementing an electric-assisted high-viscosity foaming crude oil metering method, comprising an oil pipe metering separator, a casing metering separator and a base, the oil pipe metering separator and the casing metering separator are fixed on the base, the upper liquid inlet of the oil pipe metering separator is fixedly connected with an oil pipe liquid inlet pipeline, the upper gas outlet of the oil pipe metering separator above the liquid inlet is fixedly connected with an oil pipe gas outlet pipeline, the lower liquid outlet of the oil pipe metering separator is fixedly connected with an oil pipe liquid outlet pipeline, the other end of the oil pipe gas outlet pipeline is fixedly connected with the oil pipe liquid outlet pipeline, the oil pipe gas outlet pipeline is fixedly connected with an oil pipe venting pipeline, the oil pipe metering separator below the lower liquid outlet of the oil pipe metering separator is fixedly connected with an oil pipe water outlet pipeline, and the bottom of the oil pipe metering separator is fixedly connected with an oil pipe sewage discharge pipeline; The upper liquid inlet of the casing metering separator is fixedly connected with a casing liquid inlet pipeline, the upper air outlet of the casing metering separator above the liquid inlet is fixedly connected with a casing air outlet pipeline, the lower liquid outlet of the casing metering separator is fixedly connected with a casing liquid outlet pipeline, the other end of the casing air outlet pipeline is fixedly connected with the casing liquid outlet pipeline, the casing air outlet pipeline is fixedly connected with a gas metering pipeline and a bypass pipeline, the bypass pipeline is connected with a casing venting pipeline, the bypass pipeline and the gas metering pipeline are connected to the casing liquid outlet pipeline through a check valve after being collected together, the casing metering separator below the lower liquid outlet of the casing metering separator is fixedly connected with a casing water outlet pipeline, and the bottom of the casing metering separator is fixedly connected with a casing sewage discharge pipeline; the oil pipe metering separator and the casing metering separator both adopt vertical metering separators, a high-efficiency defoaming internal combination is arranged in the vertical metering separator, and an electric heater is arranged in the vertical metering separator.

[0006] The following are further optimizations and / or improvements to the above technical solutions: The above-mentioned high-efficiency defoaming internal parts combination includes a TP plate group fixed from top to bottom in the vertical metering separator, a downcomer and a three-stage defoaming plate arranged on the outer side of the lower part of the downcomer; the downcomer includes a central tube and an inverted V-shaped flow stabilizing device, the central tube is fixed in the vertical metering separator by a bracket, a liquid inlet pipe is arranged on the upper part of the central tube, the inverted V-shaped flow stabilizing device is located at the bottom of the central tube, the inverted V-shaped flow stabilizing device includes at least one layer of flow stabilizing plate, the flow stabilizing plate is connected or spliced ​​by a plurality of inverted V-shaped plates, and flow stabilizing bubble pulling plates are distributed from top to bottom on the inner wall of the central tube between the liquid inlet pipe and the flow stabilizing plate, each flow stabilizing bubble pulling plate is inclined downward from the inner wall of the central tube to the center, and bubble breaking holes with burrs are distributed on the flow stabilizing bubble pulling plate; the three-stage defoaming plate includes three defoaming plates distributed from top to bottom on the outer side of the lower part of the central tube at intervals, and defoaming holes with burrs are distributed on each defoaming plate.

[0007] From the perspective of looking down, the steady flow bubble drawing plates near the center line of the center tube overlap with each other.

[0008] A partition is fixed in the vertical metering separator below the downcomer, a heat transfer pipe and a ventilation device are fixed on the partition, and an electric heater is arranged at the heat medium chamber below the partition.

[0009] The TP plate group is fixedly installed in the vertical metering separator through a baffle, and the TP plate group is located in the vertical metering separator below the upper air outlet of the vertical metering separator; the lower part of the vertical metering separator is respectively provided with a liquid outlet, a water outlet and a sewage outlet.

[0010] The above-mentioned oil pipe metering separator and casing metering separator are respectively provided with an on-site liquid level gauge and a differential pressure liquid level gauge.

[0011] The above-mentioned casing vent pipeline and oil pipe vent pipeline are connected to the oil casing vent manifold; the oil pipe sewage pipeline and the casing sewage pipeline are connected to the sewage manifold; the casing water outlet pipeline and the oil pipe water outlet pipeline are both connected to the sewage manifold; the gas metering pipeline is provided with a flow meter and a filter, and at the same time, the gas metering pipeline is connected to the online analysis pipeline, and the online analysis pipeline is provided with a stop valve and a sampling electric valve.

[0012] The above-mentioned oil pipe liquid inlet pipeline, oil pipe gas outlet pipeline, oil pipe liquid outlet pipeline, oil pipe vent pipeline, oil pipe water outlet pipeline, oil pipe sewage pipeline, casing liquid inlet pipeline, casing gas outlet pipeline, casing liquid outlet pipeline, gas metering pipeline, bypass pipeline, casing vent pipeline, casing water outlet pipeline, and casing sewage pipeline are respectively connected in series with valves.

[0013] The above also includes a power regulating cabinet and a power control cabinet, and the power control cabinet is electrically connected with the electric heater, the pressure differential level gauge, and the remote temperature transmitter and the remote pressure transmitter of the oil pipe metering separator and the casing metering separator.

[0014] The present invention adopts an integrated design, and the oil pipe metering separator, casing metering separator, electronic control system, instrument system and other pipelines are centrally installed on a base, which has high integration, multiple functions, small footprint and small on-site construction. A new high-efficiency defoaming internal combination is used to eliminate the "foam effect", and an electric heater is set to heat and reduce the viscosity of crude oil, so as to achieve accurate liquid and gas metering and self-draining. At the same time, a gas metering pipeline is set at the gas outlet end of the casing metering separator to achieve associated gas metering. The electric heater is used to heat and reduce the viscosity instead of steam oil compression, which reduces the use of steam during the operation of the device, reduces natural gas consumption and carbon emissions, and monitors the operation data through instruments. The electronic control operating system analyzes and adjusts the data to achieve automatic operation and unattended operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 It is a schematic diagram of the main structure of the device of the present invention.

[0016] Attached Figure 2 It is a schematic diagram of the top view of the structure of the device of the present invention.

[0017] Attached Figure 3 It is a schematic diagram of the main enlarged structure of the TP board group.

[0018] Attached Figure 4 This is a schematic diagram of the main enlarged structure of the downcomer.

[0019] Attached Figure 5 It is a schematic diagram of the main enlarged structure of the ventilation device.

[0020] Attached Figure 6 It is a schematic diagram of the main enlarged structure of the vertical metering separator.

[0021] The codes in the attached drawings are: 1 is a base, 2 is an oil pipe air outlet pipeline, 3 is a check valve, 4 is an oil pipe liquid outlet pipeline, 5 is an electric switch valve, 6 is an oil pipe liquid inlet pipeline, 7 is a flat gate valve, 8 is an on-site liquid level meter, 9 is a power regulating cabinet, 10 is a power control cabinet, 11 is a casing liquid inlet pipeline, 12 is a sampling electric valve, 13 is an online analysis pipeline, 14 is a flow meter, 15 is a gas metering pipeline, 16 is a filter, 17 is a casing air outlet pipeline, 18 is a casing venting pipeline, 19 is a bypass pipeline, 20 is a heat transfer tube, 21 is a casing water outlet pipeline, 22 is an electric heater, 23 is a casing metering separator, 24 is a hand hole, 25 is a casing sewage pipeline, 26 is a sewage manifold, 27 is an oil pipe sewage pipeline, 28 is an oil pipe water outlet pipeline, 29 is an oil pipe metering separator, 30 is a partition, 31 is an oil casing venting manifold, 32 is an oil pipe venting pipeline, 33 is a safety valve, 34 is a casing liquid outlet pipeline, 35 is a defoaming plate, 36 is a TP plate group, 37 is a baffle, 38 is a bracket, 39 is a liquid inlet pipe, 40 is a flow stabilizing bubble pulling plate, 41 is a center tube, 42 is an inverted V-shaped flow stabilizing device, 43 is a downcomer, 44 is a differential pressure level gauge, 45 is a stop valve, 46 is an electric heater connecting flange, and 47 is a ventilation device. DETAILED DESCRIPTION

[0022] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0023] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The layout is described in detail, such as the positional relationship of front, back, top, bottom, left, right, etc., which is based on the attached manual. Figure 1 It is determined by the layout direction.

[0024] The crude oil in the present invention refers to high-viscosity foaming crude oil. In the present invention, unless otherwise specified, the instruments or structures recorded are all existing well-known instruments or structures.

[0025] The present invention will be further described below in conjunction with embodiments: Embodiment 1: As attached Figure 1 , 2 As shown, the power-assisted high-viscosity foaming crude oil metering method includes metering the crude oil from the oil pipe and the casing respectively; The crude oil from the oil pipe enters the oil pipe metering separator 29 for gas-liquid separation. During the gas-liquid separation process of the crude oil in the oil pipe metering separator 29, the crude oil is defoamed by the high-efficiency defoaming internal component combination in the oil pipe metering separator 29 and heated by the electric heater 22. The foam of the crude oil can be eliminated by the high-efficiency defoaming internal component combination, and the viscosity of the crude oil can be reduced by heating to achieve self-drainage after the oil pipe metering separator 29 measures the liquid volume. The crude oil from the casing enters the casing metering separator 23 for gas-liquid separation. During the gas-liquid separation process of the crude oil in the casing metering separator 23, the crude oil is defoamed by the high-efficiency defoaming internal component combination in the casing metering separator 23 and heated by the electric heater 22. The foam of the crude oil can be eliminated by the high-efficiency defoaming internal component combination, and the viscosity of the crude oil is reduced by heating to achieve self-drainage after the casing metering separator 23 measures the liquid volume. The crude oil from the casing is discharged after the gas phase separated by the casing metering separator 23 is measured by the flow meter 14.

[0026] The amount of associated gas with crude oil from the oil pipeline is very small and is not measured.

[0027] Embodiment 2: As attached Figures 1 to 5 As shown, the device for implementing the power-assisted high-viscosity foaming crude oil metering method described in Example 1 includes an oil pipe metering separator 29, a casing metering separator 23 and a base 1. The oil pipe metering separator 29 and the casing metering separator 23 are fixed on the base 1. The upper liquid inlet of the oil pipe metering separator 29 is fixedly connected with an oil pipe liquid inlet pipeline 6, the upper gas outlet of the oil pipe metering separator 29 above the liquid inlet is fixedly connected with an oil pipe gas outlet pipeline 2, the lower liquid outlet of the oil pipe metering separator 29 is fixedly connected with an oil pipe liquid outlet pipeline 4, the other end of the oil pipe gas outlet pipeline 2 is fixedly connected with the oil pipe liquid outlet pipeline 4, the oil pipe gas outlet pipeline 2 is fixedly connected with an oil pipe venting pipeline 32, the oil pipe metering separator 29 below the lower liquid outlet of the oil pipe metering separator 29 is fixedly connected with an oil pipe water outlet pipeline 28, and the bottom of the oil pipe metering separator 29 is fixedly connected with an oil pipe sewage discharge pipeline 27; The upper liquid inlet of the casing metering separator 23 is fixedly connected with a casing liquid inlet pipeline 11, the upper gas outlet of the casing metering separator 23 above the liquid inlet is fixedly connected with a casing gas outlet pipeline 17, the lower liquid outlet of the casing metering separator 23 is fixedly connected with a casing liquid outlet pipeline 34, the other end of the casing gas outlet pipeline 17 is fixedly connected with the casing liquid outlet pipeline 34, the casing gas outlet pipeline 17 is fixedly connected with a gas metering pipeline 15 and a bypass pipeline 19, the bypass pipeline 19 is connected with a casing venting pipeline 18, and the bypass pipeline 19 After being collected together with the gas metering pipeline 15, it is connected to the casing liquid outlet pipeline 34 through the check valve 3. The casing water outlet pipeline 21 is fixedly connected to the casing metering separator 23 below the lower liquid outlet of the casing metering separator 23, and the casing sewage discharge pipeline 25 is fixedly connected at the bottom of the casing metering separator 23; the oil pipe metering separator 29 and the casing metering separator 23 both adopt vertical metering separators, and a high-efficiency defoaming internal component combination is arranged in the vertical metering separator, and the vertical metering separator is provided with an electric heater 22.

[0028] The pipelines are also integrated on the base 1 .

[0029] The present invention can well solve the metering problem of highly viscous foaming crude oil, effectively avoid the influence of crude oil foaming on the liquid level in the separation device, eliminate the influence of the "foam effect" on the metering accuracy, and at the same time solve the problem of the metering device needing steam to press oil when the system pressure is insufficient through heating. The present invention is a metering device with stronger adaptability, higher integration and automation.

[0030] The following are further optimizations and / or improvements to the above device: As attached Figures 3 to 5 As shown, the high-efficiency defoaming internal component assembly includes a TP plate group 36 fixed from top to bottom in the vertical metering separator, a downcomer 43, and a three-stage defoaming plate 35 arranged on the outer side of the lower part of the downcomer 43; the downcomer 43 includes a central tube 41 and an inverted V-shaped flow stabilizing device 42, the central tube 41 is fixed in the vertical metering separator by a bracket 38, a liquid inlet pipe 39 is arranged on the upper part of the central tube 41, and the inverted V-shaped flow stabilizing device 42 is located at the bottom of the central tube 41, and the inverted V-shaped flow stabilizing device 42 includes to There is one less layer of flow stabilizing plate, which is composed of multiple inverted V-shaped plates connected or spliced ​​together, and flow stabilizing bubble pulling plates 40 are distributed from top to bottom on the inner wall of the central tube 41 between the liquid inlet pipe 39 and the flow stabilizing plate. Each flow stabilizing bubble pulling plate 40 is inclined downward from the inner wall of the central tube 41 toward the center, and bubble breaking holes with burrs are distributed on the flow stabilizing bubble pulling plate 40; the three-stage defoaming plate 35 includes three defoaming plates 35 spaced from top to bottom on the outer side of the lower part of the central tube 41, and each defoaming plate 35 is distributed with defoaming holes with burrs.

[0031] The bubble-breaking holes with burrs are opened on the steady-flow bubble-pulling plate 40 and the inverted V-shaped steady-flow device 42 to achieve preliminary defoaming of the incoming liquid and steady flow. The bubble-breaking holes with burrs are opened on the steady-flow bubble-pulling plate 40 to achieve preliminary defoaming of the incoming liquid, and the inverted V-shaped steady-flow device 42 achieves steady flow of the incoming liquid. The defoaming holes with burrs are also opened on the defoaming plate 35 to achieve secondary defoaming, and the separated gas is finally purified into dry gas through the TP plate group 36.

[0032] The steady-flow bubble-pulling plate 40 is provided with bubble-breaking holes with burrs, and this component can break large bubbles and expand small bubbles.

[0033] Crude oil enters the vertical metering separator through the liquid inlet, undergoes preliminary defoaming and steady flow in the downcomer 43, undergoes preliminary gas-liquid separation, and then enters the "three-stage defoaming section" (three defoaming plates 35), and is discharged from the liquid outlet after sufficient defoaming. The gas generated during the defoaming period enters the TP plate group 36 together with the gas initially separated by the downcomer 43, and undergoes gas-liquid separation and defoaming in the gas, and finally the gas is discharged through the gas outlet. The whole process of gas-liquid separation, defoaming in the liquid, defoaming in the gas, and defoaming in the gas is realized, and finally the metering accuracy is achieved.

[0034] For the oil pipe metering separator 29 , the liquid inlet pipe 39 of the center tube 41 is connected to the upper liquid inlet of the oil pipe metering separator 29 ; for the casing metering separator 23 , the liquid inlet pipe 39 of the center tube 41 is connected to the upper liquid inlet of the casing metering separator 23 .

[0035] As attached Figure 4 As shown, from a top view, a section of the steady flow bubble drawing plates 40 near the center line of the central tube 41 overlaps with each other.

[0036] As attached Figure 6 As shown, the TP plate group 36 is fixedly installed in the vertical metering separator through the baffle 37, and the TP plate group 36 is located in the vertical metering separator below the upper air outlet of the vertical metering separator; the lower part of the vertical metering separator is respectively provided with a liquid outlet, a water outlet and a sewage outlet.

[0037] As attached Figure 6 As shown, a partition 30 is fixed in the vertical metering separator below the downcomer 43, a heat transfer pipe 20 and a ventilation device 47 are fixed on the partition 30, and an electric heater 22 is connected to the heat medium chamber below the partition 30 through an electric heater connecting flange 46.

[0038] The heat transfer tube 20 is inserted on the partition 30 and matched with the electric heater 22 to heat the crude oil and reduce its viscosity. The electric heater 22 heats the salt solution in the space below the partition 30 and then transfers the heat to the crude oil through the heat transfer tube 20, so that the crude oil is evenly heated and the vertical metering separator can self-drain. This method can avoid the problem that the electric heater 22 directly heats the crude oil, causing coking on the surface of the electric heater and shortening its service life.

[0039] The electric heater 22, the heat transfer tube 20 and the heat transfer medium (any medium with a density greater than that of crude oil and a stable state when heated) in the heat medium cavity below the partition 30 constitute a heating source for heating the crude oil.

[0040] As attached Figure 2 As shown, the oil pipe metering separator 29 and the casing metering separator 23 are respectively provided with an on-site liquid level gauge 8 and a differential pressure liquid level gauge 44 .

[0041] As attached Figure 5 As shown, the ventilation device 47 is welded by a section of steel pipe and a steel plate, and small holes are evenly opened on the steel pipe, and the small holes are used to connect the space above and below the partition 30.

[0042] The ventilation device 47 and the heat medium cavity below the partition 30 form a water bag, and the local liquid level meter 8 is combined with the water bag and the metering chamber of the oil pipe metering separator 29 to measure the amount of liquid entering the oil pipe metering separator 29 by using the principle of a communicating vessel. Similarly, the casing metering separator 23 measures the amount of liquid according to the same principle.

[0043] As attached Figure 1 , 2 As shown, the casing vent line 18 and the oil pipe vent line 32 are connected to the oil casing vent manifold 31; the oil pipe sewage pipeline 27 and the casing sewage pipeline 25 are connected to the sewage manifold 26; the casing water outlet pipeline 21 and the oil pipe water outlet pipeline 28 are both connected to the sewage manifold 26; the gas metering pipeline 15 is provided with a flow meter 14 and a filter 16, and at the same time, the gas metering pipeline 15 is connected to the online analysis pipeline 13, and the online analysis pipeline 13 is provided with a stop valve and a sampling electric valve 12.

[0044] As attached Figure 2 As shown, valves are respectively connected in series to the oil pipe liquid inlet pipeline 6, the oil pipe gas outlet pipeline 2, the oil pipe liquid outlet pipeline 4, the oil pipe venting pipeline 32, the oil pipe water outlet pipeline 28, the oil pipe sewage discharge pipeline 27, the casing liquid inlet pipeline 11, the casing gas outlet pipeline 17, the casing liquid outlet pipeline 34, the gas metering pipeline 15, the bypass pipeline 19, the casing venting pipeline 18, the casing water outlet pipeline 21, and the casing sewage discharge pipeline 25.

[0045] According to actual needs, the valve can be a flat gate valve 7 or an electric switch valve 5 or other valves.

[0046] The specific settings of the valve, such as Figure 1 , 2As shown, the casing liquid inlet pipeline 11 is provided with a flat gate valve 7, the gas metering pipeline 15 is provided with a flat gate valve 7, a filter 16, a flow meter 14, an electric switch valve 5, and a flat gate valve 7 in sequence according to the fluid flow direction, and the casing liquid outlet pipeline 34 is provided with an electric switch valve 5 and a check valve 3 in sequence according to the fluid flow direction. The setting of the check valve 3 can prevent gas-liquid backflow.

[0047] The oil pipe inlet pipeline 6 is provided with a flat gate valve 7, and the oil pipe outlet pipeline 2 is provided with an electric switch valve 5 and a check valve 3 in sequence according to the flow direction of the fluid; the oil pipe outlet pipeline 4 is provided with an electric switch valve 5 and a check valve 3 in sequence according to the flow direction of the fluid, and the check valve 3 can prevent gas and liquid from flowing back. The oil pipe venting pipeline 32 is provided with a flat gate valve 7, a safety valve 33, and a flat gate valve 7 in sequence according to the flow direction of the fluid; a stop valve 45 can be provided on the adjacent pipeline.

[0048] As attached Figure 2 As shown, it also includes a power regulating cabinet 9 and a power control cabinet 10. The power control cabinet 10 is electrically connected to the electric heater 22, the differential pressure level gauge 44, and the remote temperature transmitter and remote pressure transmitter of the oil pipe metering separator 29 and the casing metering separator 23.

[0049] The power regulating cabinet 9 provides power and power distribution for the operation of the device. The power control cabinet 10 is connected to the electric heater 22, the differential pressure level gauge 44, and the ports on the remote temperature transmitter and the remote pressure transmitter on the metering separator to collect measuring point data, display data, implement control and upload data.

[0050] The present invention provides an electric-assisted high-viscosity foaming crude oil metering method and device, and the device belongs to a volumetric metering device. Different from conventional volumetric metering devices, the vertical separator in the metering device is provided with a new type of high-efficiency defoaming internal component combination device to eliminate the "foaming effect", and an electric heater 22 is provided to heat and reduce the viscosity of the crude oil, so as to achieve accurate liquid and gas metering and self-draining. At the same time, a gas metering pipeline is provided at the outlet end of the casing metering separator 23 to achieve associated gas metering. At the same time, the device uses an instrument system and an electronic control operating system to interlock the temperature, pressure, water level, and surface temperature of the heating tube of the electric heater 22 of the vertical metering separator, so as to achieve automatic and safe operation of the device. The operating state of the device is always maintained in the set state, and the electric heater 22 is used to heat and reduce the viscosity instead of the steam oil pressure method. At the same time, the electric heater 22 can be controlled to start and stop according to system needs to rationally utilize electrical energy, thereby improving the operating effect of the metering device and the electrification transformation of the equipment.

[0051] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. An electric-assisted high-viscosity foaming crude oil metering method, characterized in that This includes separate metering of crude oil from tubing and casing; The crude oil from the oil pipe enters the oil pipe metering separator for gas-liquid separation. During the gas-liquid separation process of the oil pipe metering separator, the crude oil is defoamed by a high-efficiency defoaming internal component combination in the oil pipe metering separator and heated by an electric heater. The foam of the crude oil can be eliminated by the high-efficiency defoaming internal component combination, and the viscosity of the crude oil is reduced by heating to achieve self-drainage after the oil pipe metering separator measures the liquid volume. The crude oil from the casing enters the casing metering separator for gas-liquid separation. During the gas-liquid separation process of the crude oil in the casing metering separator, the crude oil is defoamed by a high-efficiency defoaming internal component combination and heated by an electric heater in the casing metering separator. The foam of the crude oil can be eliminated by the high-efficiency defoaming internal component combination, and the viscosity of the crude oil is reduced by heating to achieve self-drainage after the casing metering separator measures the liquid volume. The crude oil from the casing is discharged after the gas phase separated by the casing metering separator is measured by a flow meter.

2. A device for implementing the power-assisted high-viscosity foaming crude oil metering method according to claim 1, characterized in that It comprises an oil pipe metering separator, a casing metering separator and a base, wherein the oil pipe metering separator and the casing metering separator are fixed on the base, an upper liquid inlet of the oil pipe metering separator is fixedly connected with an oil pipe liquid inlet pipeline, an upper gas outlet of the oil pipe metering separator above the liquid inlet is fixedly connected with an oil pipe gas outlet pipeline, a lower liquid outlet of the oil pipe metering separator is fixedly connected with an oil pipe liquid outlet pipeline, the other end of the oil pipe gas outlet pipeline is fixedly connected with the oil pipe liquid outlet pipeline, an oil pipe venting pipeline is fixedly connected with the oil pipe metering separator below the lower liquid outlet of the oil pipe metering separator, and an oil pipe sewage discharge pipeline is fixedly connected with the bottom of the oil pipe metering separator; The upper liquid inlet of the casing metering separator is fixedly connected with a casing liquid inlet pipeline, the upper air outlet of the casing metering separator above the liquid inlet is fixedly connected with a casing air outlet pipeline, the lower liquid outlet of the casing metering separator is fixedly connected with a casing liquid outlet pipeline, the other end of the casing air outlet pipeline is fixedly connected with the casing liquid outlet pipeline, the casing air outlet pipeline is fixedly connected with a gas metering pipeline and a bypass pipeline, the bypass pipeline is connected with a casing venting pipeline, the bypass pipeline and the gas metering pipeline are connected to the casing liquid outlet pipeline through a check valve after being collected together, the casing metering separator below the lower liquid outlet of the casing metering separator is fixedly connected with a casing water outlet pipeline, and the bottom of the casing metering separator is fixedly connected with a casing sewage discharge pipeline; the oil pipe metering separator and the casing metering separator both adopt vertical metering separators, a high-efficiency defoaming internal combination is arranged in the vertical metering separator, and an electric heater is arranged in the vertical metering separator.

3. The device according to claim 2, characterized in that The high-efficiency defoaming internal parts combination includes a TP plate group fixed from top to bottom in a vertical metering separator, a downcomer and a three-stage defoaming plate arranged on the outer side of the lower part of the downcomer; the downcomer includes a central tube and an inverted V-shaped flow stabilizing device, the central tube is fixed in the vertical metering separator by a bracket, a liquid inlet pipe is arranged on the upper part of the central tube, the inverted V-shaped flow stabilizing device is located at the bottom of the central tube, the inverted V-shaped flow stabilizing device includes at least one layer of flow stabilizing plate, the flow stabilizing plate is connected or spliced ​​by a plurality of inverted V-shaped plates, and flow stabilizing bubble pulling plates are distributed from top to bottom on the inner wall of the central tube between the liquid inlet pipe and the flow stabilizing plate, each flow stabilizing bubble pulling plate is inclined downward from the inner wall of the central tube to the center, and bubble breaking holes with burrs are distributed on the flow stabilizing bubble pulling plate; the three-stage defoaming plate includes three defoaming plates distributed from top to bottom on the outer side of the lower part of the central tube at intervals, and defoaming holes with burrs are distributed on each defoaming plate.

4. The device according to claim 3, characterized in that From a bird's-eye view, a section of the steady flow bubble pulling plates near the center line of the center tube overlaps with each other.

5. The device according to claim 3 or 4, characterized in that A partition is fixed in the vertical metering separator below the downcomer, a heat transfer pipe and a ventilation device are fixed on the partition, and an electric heater is arranged at the heat medium chamber below the partition.

6. The device according to claim 2, 3, 4 or 5, characterized in that The TP plate group is fixedly installed in the vertical metering separator through a baffle, the TP plate group is located in the vertical metering separator below the upper air outlet of the vertical metering separator, and the lower part of the vertical metering separator is respectively provided with a liquid outlet, a water outlet and a sewage outlet; or / and, the oil pipe metering separator and the casing metering separator are respectively provided with an on-site liquid level gauge and a differential pressure liquid level gauge.

7. The device according to any one of claims 2 to 6, characterized in that The casing vent pipeline and the oil pipe vent pipeline are connected to the oil casing vent manifold; the oil pipe sewage pipeline and the casing sewage pipeline are connected to the sewage manifold; the casing water outlet pipeline and the oil pipe water outlet pipeline are both connected to the sewage manifold; the gas metering pipeline is provided with a flow meter and a filter, and at the same time, the gas metering pipeline is connected to the online analysis pipeline, and the online analysis pipeline is provided with a stop valve and a sampling electric valve.

8. The device according to claim 2, 3 or 4, characterized in that Valves are respectively connected in series on the oil pipe liquid inlet pipeline, oil pipe gas outlet pipeline, oil pipe liquid outlet pipeline, oil pipe vent pipeline, oil pipe water outlet pipeline, oil pipe sewage discharge pipeline, casing liquid inlet pipeline, casing gas outlet pipeline, casing liquid outlet pipeline, gas metering pipeline, bypass pipeline, casing vent pipeline, casing water outlet pipeline and casing sewage discharge pipeline.

9. The device according to claim 5, 6 or 7, characterized in that Valves are respectively connected in series on the oil pipe liquid inlet pipeline, oil pipe gas outlet pipeline, oil pipe liquid outlet pipeline, oil pipe vent pipeline, oil pipe water outlet pipeline, oil pipe sewage discharge pipeline, casing liquid inlet pipeline, casing gas outlet pipeline, casing liquid outlet pipeline, gas metering pipeline, bypass pipeline, casing vent pipeline, casing water outlet pipeline and casing sewage discharge pipeline.

10. The device according to any one of claims 2 to 9, characterized in that It also includes a power regulating cabinet and a power control cabinet. The power control cabinet is electrically connected with an electric heater, a differential pressure level gauge, and a remote temperature transmitter and a remote pressure transmitter of an oil pipe metering separator and a casing metering separator.

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