CN109915113B - Wellhead oil-gas-water three-phase flow impedance capacitance water content measuring device and method - Google Patents

Wellhead oil-gas-water three-phase flow impedance capacitance water content measuring device and method Download PDF

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CN109915113B
CN109915113B CN201910289703.3A CN201910289703A CN109915113B CN 109915113 B CN109915113 B CN 109915113B CN 201910289703 A CN201910289703 A CN 201910289703A CN 109915113 B CN109915113 B CN 109915113B
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pipeline
gas
control valve
wellhead
flange
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CN109915113A (en
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孔德明
陈基亮
李军
孔维航
袁丽
田小强
谢贝贝
崔耀耀
孔令富
郝虎
吴伟超
何大川
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Yanshan University
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Yanshan University
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Abstract

The invention relates to a wellhead oil-gas-water three-phase flow impedance capacitance water content measuring device and method. During measurement, gas-liquid separation is firstly carried out on oil-gas-water three-phase flow in a gas-liquid separation system, gas phase is discharged from a gas phase outlet pipeline, and liquid phase flows through a dynamic water content measurement system and a static water content measurement system respectively and is subjected to dynamic and static water content measurement. The invention has the advantages of high sensitivity, reliable measurement, low cost, long service life and high safety, solves the problem that water content data can be obtained only in the process of transporting a sample to a central laboratory for testing and the like after the sample is sampled at the wellhead of the oil well in the traditional production, and realizes the high-efficiency real-time monitoring of the oil yield of the oil well.

Description

Wellhead oil-gas-water three-phase flow impedance capacitance water content measuring device and method
Technical Field
The invention relates to a device and a method for measuring water content of a land surface wellhead, in particular to a device and a method for measuring water content of an oil-gas-water three-phase flow impedance capacitor of a land surface wellhead.
Background
In an oil well deep storage area, gas mainly comprises natural gas, hydrocarbon and non-hydrocarbon gas, and mainly exists in crude oil in the form of dissolved gas, along with the upward flowing process of the crude oil, the gas is gradually separated out along with the reduction of pressure, and the phenomenon that three phases of oil, gas and water are mixed and coexist at an oil well mouth can occur. With the development of computer technology and network technology, the digitization for promoting oil field production becomes the first development strategy of oil field construction, but the automatic measurement of the water content parameter of the single well mouth of the oil field becomes the key technical problem of the automation of oil field production management. Taking the North China oil field as an example, the method for periodically sampling and testing the water content of the crude oil at the land wellhead in 2018 still adopts a manual sampling and testing method, and is large in error, low in efficiency and poor in real-time performance. Therefore, it is urgently needed to develop an on-line direct measurement device for wellhead parameters to realize test automation operation and continuous non-separation automatic measurement of oil well produced liquid.
Many technical methods for measuring the moisture content mainly include a direct measurement method, a ray attenuation method, a microwave method, a differential pressure method, an electrical method, an imaging method, and the like, and with the development of the technology, more and more measurement means are used for measuring the moisture content. The electrical method mainly comprises a capacitance method and a conductivity method, and the conductivity and dielectric properties of the oil-water two-phase are obviously different, so that the conductivity and capacitance sensor measuring method can be better applied to the measurement of the phase content of the oil-water two-phase flow. The capacitance method is to measure the phase content according to the different dielectric constants of the components in the measured fluid, and the sensor has the characteristics of simple structure, low cost, high response speed and the like. However, the current conductivity method needs to obtain a dynamic full-water phase correction value in an oil well in advance, automatic measurement cannot be realized, the capacitance method mainly aims at dynamic measurement under the condition of low water content and has high accuracy, the measurement effect in a high water content area is extremely poor, and meanwhile, the conductivity method and the capacitance method are both easily influenced by gas phase conditions and have large accuracy difference.
At present, various multi-parameter measuring oil, gas and water three-phase flow measuring devices aiming at land wellheads are developed at home and abroad, but the price is high, the volume is large, the work is complex, and therefore, the device is suitable for basic conditions of oil fields such as numerous oil fields and oil wells in China, wide measuring wellhead range, large demand, frequent field measurement and the like. The real-time online measuring device for the water content of the wellhead of the land surface is urgently needed, and has the characteristics of small size, low cost, easiness in maintenance, high safety, high reliability and the like.
Disclosure of Invention
The invention aims to provide a device and a method for measuring the water content of a wellhead oil-gas-water three-phase flow resistance anti-capacitance, which can be used for measuring the water content of a complex fluid of an oil-gas-water three-phase flow on line in real time at the wellhead of an oil well.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention provides a wellhead oil-gas-water three-phase flow resistance anti-capacitance water content measuring device which comprises a wellhead installation module, a gas-liquid separation system, a dynamic water content measuring system, a static water content measuring system, a control valve group and a data processing system, wherein the wellhead installation module comprises an installation pipeline, an installation pipeline inlet flange and an installation pipeline outlet flange, and the installation pipeline inlet flange and the installation pipeline outlet flange are respectively welded at two ends of the installation pipeline;
the gas-liquid separation system comprises a mixed phase inlet pipeline, a gas-liquid separation tank base, a first flange at the top of the gas-liquid separation tank, a second flange at the top of the gas-liquid separation tank, a wire connector, an exhaust valve, a first one-way valve, a gas phase outlet pipeline and a mixed phase outlet pipeline, wherein the mixed phase inlet pipeline, the gas-liquid separation tank base and the first flange at the gas-liquid separation tank are respectively welded on the gas-liquid separation tank, the wire connector, the mixed phase outlet pipeline and the gas phase outlet pipeline are respectively welded on the second flange at the top of the gas-liquid separation tank, the first flange at the top of the gas-liquid separation tank and the second flange at the top of the gas-liquid separation tank are in sealing connection in a standard flange connection mode, and the exhaust valve and the first one;
the dynamic water content measuring system comprises a stainless steel shell, a first impedance sensor, a second impedance sensor, a third impedance sensor and a wire outlet, wherein the stainless steel shell is provided with a liquid inlet and a microcirculation inlet, the first impedance sensor is installed between the liquid inlet and the microcirculation inlet, and the second impedance sensor and the third impedance sensor are sequentially installed above the liquid inlet;
the static water content measuring system comprises a static measuring pipeline, a static measuring pipeline top first flange, a static measuring pipeline top second flange, an electrode fixing block, a central electrode and a second one-way valve, wherein the bottom of the static measuring pipeline is welded on the gas-liquid separation tank, the static measuring pipeline top is welded with the static measuring pipeline top first flange, the static measuring pipeline is welded with a bypass pipe at the position below the static measuring pipeline top first flange and is in sealed communication with a second one-way valve liquid inlet, a second one-way valve liquid outlet is in sealed communication with the mixed phase outlet pipeline through a pipeline, the central electrode is hermetically arranged in the middle of the electrode fixing block, and the electrode fixing block is hermetically arranged on the static measuring pipeline top second flange;
the control valve group comprises a first control valve, a second control valve, a third control valve and a fourth control valve, the first control valve is installed on the installation pipeline, the mixed phase inlet pipeline and the installation pipeline are connected through the second control valve, the mixed phase outlet pipeline and the installation pipeline are connected through the third control valve, and the fourth control valve is installed at the bottom of the static measurement pipeline;
the data processing system comprises a wellhead circuit system, a wireless base station and a computer, the first control valve, the second control valve, the third control valve, the fourth control valve, the first impedance sensor, the second impedance sensor, the third impedance sensor and the central electrode are all connected with the wellhead circuit system, and the wellhead circuit system is in wireless data transmission with the computer through the wireless base station.
Preferably, in the wellhead installation module, the installation pipeline is installed in the middle of the first control valve in a sealing mode, the first control valve and the installation pipeline inlet flange are connected with the liquid inlet of the second control valve in a sealing mode through a pipeline, and the first control valve and the installation pipeline outlet flange are connected with the liquid outlet of the third control valve in a sealing mode through a pipeline.
Preferably, in the gas-liquid separation module, one end of the mixed phase inlet pipeline is hermetically connected with a liquid outlet of the second control valve; the other end of the mixed phase inlet pipeline is hermetically connected with the gas-liquid separation tank, one end of the mixed phase outlet pipeline is hermetically connected with the liquid inlet of the third control valve, and the other end of the mixed phase outlet pipeline is welded on a second flange at the top of the gas-liquid separation tank; one end of the gas-phase outlet pipeline is welded on the side wall of the mixed-phase outlet pipeline, the other end of the gas-phase outlet pipeline is welded on a second flange at the top of the gas-liquid separation tank, and the exhaust valve and the first one-way valve are sequentially and hermetically installed on the gas-phase outlet pipeline along the flowing direction of gas.
Preferably, in the dynamic water content measuring system, the number of the impedance sensors is N, and N is a positive integer greater than or equal to 2; the first impedance sensor is installed between the micro-circulation inlet and the liquid inlet; the second to Nth impedance sensors are sequentially arranged between the liquid inlet and the line outlet along the liquid flowing direction; and the height of the outlet is lower than that of the first flange at the top of the gas-liquid separation tank.
Preferably, in the device for measuring impedance, capacitance and water content of three-phase flow of oil, gas and water at the wellhead, the working process of the data processing system is as follows:
(1) the computer sends a signal acquisition starting instruction to the wireless base station;
(2) the wireless base station sends a signal acquisition starting instruction sent by the computer to the wellhead circuit system;
(3) the wellhead circuit system receives a signal acquisition starting instruction sent by the wireless base station, realizes the flowing and stopping of fluid in the wellhead oil-gas-water three-phase flow impedance capacitance water content measuring device by controlling the on-off of the first control valve, the second control valve, the third control valve and the fourth control valve, acquires signals of the first impedance sensor, the second impedance sensor, the third impedance sensor and the central electrode, and finally sends the signals to the wireless base station;
(4) the wireless base station transmits the signals collected by the circuit system to the computer;
(5) the computer receives the signal sent by the wireless base station, sends a command for stopping signal acquisition to the wireless base station, and calculates, visualizes and stores the signal;
(6) the wireless base station sends a command for terminating signal acquisition sent by the computer to the wellhead circuit system;
(7) and the wellhead circuit system receives a termination signal acquisition instruction sent by the wireless base station and stops signal acquisition.
Preferably, the control method of the wellhead oil-gas-water three-phase flow resistance capacitance-resistance water content measuring device comprises the following steps,
(1) the computer sends a signal acquisition starting instruction to the wireless base station;
(2) the wireless base station sends a signal acquisition starting instruction sent by the computer to the wellhead circuit system;
(3) the wellhead circuit system receives a signal acquisition starting instruction sent by the wireless base station, and then controls the second control valve to be opened, the third control valve to be opened, the fourth control valve to be opened and the first control valve to be closed;
(4) the wellhead circuitry collects the first impedance sensor data, and collects the second impedance sensor and the third impedance sensor data;
(5) after a first waiting time, the fourth control valve is closed;
(6) after a second waiting time, the wellhead circuit system acquires the central electrode data;
(7) the wellhead circuit system sends the acquired data to the wireless base station;
(8) the wireless base station transmits the data collected by the circuit system to the computer;
(9) the computer performs data storage, dynamic water content calculation, static water content calculation and data display;
(10) the computer receives the data sent by the wireless base station, sends a command for stopping signal acquisition to the wireless base station, and calculates, visualizes and stores the signal;
(11) the wireless base station sends a command for terminating signal acquisition sent by the computer to the wellhead circuit system;
(12) and the wellhead circuit system receives a termination signal acquisition instruction sent by the wireless base station, controls the first control valve to be opened, controls the second control valve to be closed, controls the third control valve to be closed, and stops data acquisition of the first impedance sensor, the second impedance sensor, the third impedance sensor and the central electrode.
The invention has the advantages that: sensitivity is high, measure reliably, low cost, long service life, the security is high, process such as the sample transport to central laboratory carries out the chemical examination can obtain the water content data after the oil well head sample in having solved traditional production, the real time monitoring of the oil production volume of oil well has been realized, the fluctuation of oil well output can in time be discover, the hysteresis quality of traditional test has been avoided, and simultaneously, each oil field has been reduced to the input of on-the-spot manpower, material resources and financial resources, practice thrift the cost for the daily management of oil field production, sample when having avoided on-the-spot staff to test crude oil water content, send appearance and chemical examination step, greatly reduced on-the-spot staff's the amount of labour, the real-time on-line measurement of land face single well head oil gas water three-phase flow.
Drawings
FIG. 1 is a schematic diagram of a wellhead oil-gas-water three-phase flow impedance capacitance water content measuring device according to the invention; and
FIG. 2 is a schematic flow chart of a control method of the impedance capacitance water content measuring device for wellhead oil-gas-water three-phase flow.
Reference numerals: installing the pipeline 1; a first control valve 2; a second control valve 3; a third control valve 4; a miscible inlet conduit 5; a gas-liquid separation tank 6; an exhaust valve 7; a first check valve 8; a gas phase outlet conduit 9; a mixed phase outlet line 10; a stainless steel case 11; a liquid inlet 12; a microcirculation inlet 13; a first impedance sensor 14; a second impedance sensor 15; a third impedance sensor 16; an outlet 17; a wire connector 18; a first flange 19 at the top of the gas-liquid separation tank; a second flange 20 at the top of the gas-liquid separation tank; a fourth control valve 21; a static measurement pipe 22; a center electrode 23; an electrode fixing block 24; a static measurement pipe top first flange 25; a static measurement pipe top second flange 26; installing a pipeline inlet flange 27; installing a pipeline outlet flange 28; a gas-liquid separator base 29; a second check valve 30; a wellhead circuitry 31; a radio base station 32; a computer 33.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
[ example 1 ]
A device and a method for measuring the water content of a wellhead oil-gas-water three-phase flow impedance capacitor are disclosed, and as shown in figure 1, the device for measuring the water content comprises a wellhead installation module, a gas-liquid separation system, a dynamic water content measuring system, a static water content measuring system, a control valve set and a data processing system. The wellhead installation module comprises an installation pipeline 1, an installation pipeline inlet flange 27 and an installation pipeline outlet flange 28, wherein the installation pipeline inlet flange 27 and the installation pipeline outlet flange 28 are respectively welded at two ends of the installation pipeline 1;
the gas-liquid separation system comprises a mixed phase inlet pipeline 5, a gas-liquid separation tank 6, a gas-liquid separation tank base 29, a first flange 19 at the top of the gas-liquid separation tank, a second flange 20 at the top of the gas-liquid separation tank, a wire connector 18, an exhaust valve 7, a first one-way valve 8, a gas phase outlet pipeline 9 and a mixed phase outlet pipeline 10, wherein the mixed phase inlet pipeline 5, the gas-liquid separation tank base 29 and the first flange 19 of the gas-liquid separation tank are respectively welded on the gas-liquid separation tank 6, the wire connector 18, the mixed phase outlet pipeline 10 and the gas phase outlet pipeline 9 are respectively welded on the second flange 20 at the top of the gas-liquid separation tank, the first flange 19 at the top of the gas-liquid separation tank and the second flange 20 at the top of the gas-liquid separation tank are in sealing connection in a standard flange connection mode;
the dynamic water content measuring system comprises a stainless steel shell 11, a first impedance sensor 14, a second impedance sensor 15, a third impedance sensor 16 and an outlet 17, wherein the stainless steel shell 11 is provided with a liquid inlet 12 and a microcirculation inlet 13, the first impedance sensor 14 is arranged between the liquid inlet 12 and the microcirculation inlet 13, and the second impedance sensor 15 and the third impedance sensor 16 are positioned above the liquid inlet 12;
the static water content measuring system comprises a static measuring pipeline 22, a first flange 25 at the top of the static measuring pipeline, a second flange 26 at the top of the static measuring pipeline, an electrode fixing block 24, a central electrode 23 and a second one-way valve 30, wherein the bottom of the static measuring pipeline 22 is welded on the gas-liquid separation tank 6, the first flange 25 at the top of the static measuring pipeline 22 is welded at the top of the static measuring pipeline, a bypass pipe is welded at the position below the first flange 25 at the top of the static measuring pipeline 22 and is communicated with a liquid inlet of the second one-way valve 30 in a sealing way, a liquid outlet of the second one-way valve 30 is communicated with the mixed phase outlet pipeline 10 in a sealing way through a pipeline, the central electrode 23 is arranged in the middle of the electrode fixing block 24 in a sealing way, and the electrode;
the control valve group comprises a first control valve 2, a second control valve 3, a third control valve 4 and a fourth control valve 21, the first control valve 2 is installed on the installation pipeline 1, the second control valve 3 is connected with the miscible phase inlet pipeline 5 and the installation pipeline 1, the third control valve 4 is connected with the miscible phase outlet pipeline 10 and the installation pipeline 1, and the fourth control valve 21 is installed at the bottom of the static measurement pipeline 22;
the data processing system comprises a wellhead circuit system 31, a wireless base station 32 and a computer 33, the wellhead circuit system is connected with the first control valve 2, the second control valve 3, the third control valve 4, the fourth control valve 21, the first impedance sensor 14, the second impedance sensor 15, the third impedance sensor 16 and the center electrode 23, and the wellhead circuit system 31 carries out wireless data transmission with the computer 33 through the wireless base station 32.
[ example 2 ]
In the wellhead installation module, the installation pipeline 1 is provided with a first control valve 2 in the middle in a sealing mode, the first control valve 2 and an installation pipeline inlet flange 27 are in sealing connection with a liquid inlet of a second control valve 3 through a pipeline, and the first control valve 2 and an installation pipeline outlet flange 28 are in sealing connection with a liquid outlet of a third control valve 4 through a pipeline.
In the gas-liquid separation module, one end of a mixed phase inlet pipeline 5 is hermetically connected with a liquid outlet of a second control valve 3, and the other end of the mixed phase inlet pipeline is hermetically connected with a gas-liquid separation tank 6; one end of the mixed phase outlet pipeline 10 is hermetically connected with a liquid inlet of the third control valve 4, and the other end of the mixed phase outlet pipeline 10 is welded on a second flange 20 at the top of the gas-liquid separation tank; one end of the gas phase outlet pipeline 9 is welded on the side wall of the mixed phase outlet pipeline 10, the other end of the gas phase outlet pipeline is welded on a second flange 20 at the top of the gas-liquid separation tank, and an exhaust valve 7 and a first one-way valve 8 are sequentially and hermetically installed on the gas phase outlet pipeline 9 along the flowing direction of gas.
In the dynamic water content measuring system, the number of the impedance sensors is N, and N is a positive integer greater than or equal to 2; a first impedance sensor 14 is mounted between the micro-circulation inlet 13 and the loading port 12; the second to nth impedance sensors are sequentially installed between the liquid inlet 12 and the liquid outlet 17 along the liquid flowing direction (the present invention is introduced with N ═ 2, as shown in fig. 1, the first impedance sensor 14 and the second impedance sensor 15 are sequentially installed between the liquid inlet 12 and the liquid outlet 17 along the liquid flowing direction); the outlet 17 is lower than the first flange 19 at the top of the gas-liquid separation tank.
In the data processing system, a wellhead circuit system 31 is responsible for controlling the on-off of a first control valve 2, a second control valve 3, a third control valve 4 and a fourth control valve 21, collecting signals of a first impedance sensor 14, a second impedance sensor 15, a third impedance sensor 16 and a center electrode 23, and sending the signals to a computer 33 through a wireless base station 32 or receiving instruction signals of the computer 33 from the wireless base station 32; the wireless base station 32 is responsible for wireless signal transfer between the wellhead circuit system 31 and the computer 33; the computer 33 is responsible for receiving the signal data collected by the wellhead circuit system 31 from the wireless base station 32, performing calculation, visualization processing and storage on the signals, and sending out instructions for starting signal collection and stopping signal collection.
[ example 3 ]
A control method of a wellhead oil-gas-water three-phase flow impedance capacitance water content measuring device is characterized in that a computer 33 is used for manually sending a start signal acquisition instruction and a stop signal acquisition instruction, a wellhead circuit system 31 receives the instruction sent by the computer 33 from a wireless base station 32, controls the flow of fluid in the measuring device by controlling the on-off of a control valve set, and performs signal acquisition and transmission; the control method comprises the following steps:
as shown in fig. 2, after the wellhead circuit system 31 receives a signal acquisition start instruction sent by the computer 33, the wellhead circuit system 31 controls the second control valve 3, the third control valve 4 and the fourth control valve 21 to be opened, and the first control valve 2 to be closed; the oil-gas-water multiphase fluid flows through the mounting pipeline inlet flange 27, the second control valve 3 and the mixed phase inlet pipeline 5 to reach the inside of the gas-liquid separation tank 6, gas-liquid separation is carried out under the action of gravity, wherein gas phase is concentrated at the top of the gas-liquid separation tank 6, reaches the mixed phase outlet pipeline 10 along the gas phase outlet pipeline 9 through the exhaust valve 7 and the first one-way valve 8, and finally passes through the third control valve 4 and the mounting pipeline outlet flange 28 to be discharged out of the device; the water phase and the oil phase (hereinafter referred to as liquid phase) in the gas-liquid separation tank 6 are concentrated at the middle lower part of the gas-liquid separation tank 6, enter the stainless steel shell 11 through the liquid inlet 12, flow upwards, reach the mixed phase outlet pipeline 10 through the second impedance sensor 15 and the third impedance sensor 16, are remixed with the gas phase discharged from the gas phase outlet pipeline 9, and are discharged out of the device through the third control valve 4 and the mounting pipeline outlet flange 28; under the action of gravity, part of water phase is accumulated at the bottom of the gas-liquid separation tank 6, wherein a small amount of water phase enters the first impedance sensor 14 from the microcirculation inlet 13 and is finally mixed with the liquid phase entering from the liquid inlet 12, and the water phase in the first impedance sensor 14 is subjected to micro-flow updating; in the process, the wellhead circuitry 31 collects the full water value data of the first impedance sensor 14 and the mixed phase value of the data of the second impedance sensor 15 and the third impedance sensor 16.
In addition, when the fourth control valve 21 is opened, the liquid phase enters the static measurement pipeline 22 and flows upwards, flows through the second check valve 30 and enters the mixed phase outlet pipeline 10, and finally flows through the third control valve 4 and the installation pipeline outlet flange 28 and flows out of the device; meanwhile, when the first waiting time T passes1Thereafter, the fourth control valve 21 is closed, and the fluid inside the static measuring pipe 22 is still and the second waiting time T is passed under the action of gravity2After that, the separation of the fluid inside the static measurement pipeline 22 is completed, the bottom of the static measurement pipeline 22 is a water phase, the top is an oil phase, the central electrode 23 and the static measurement pipeline 22 constitute two electrodes of the capacitance liquid level meter, the height of the water phase inside the static measurement pipeline 22 can be reversely deduced by measuring the capacitance value between the central electrode 23 and the static measurement pipeline 22, and the wellhead circuit system 31 acquires the capacitance signal data of the central electrode 23.
Finally, the wellhead circuit system 31 sends the acquired data to the computer 33 through the wireless base station 32, and the computer 33 performs data storage, dynamic water content calculation, static water content calculation and data display.
As shown in fig. 2, after the wellhead circuit system 31 receives the instruction of terminating the signal acquisition sent by the computer 33, the wellhead circuit system 31 controls the first control valve 2 to open, the second control valve 3 to close, the third control valve 4 to close, and at this time, the fourth control valve 21 is already in a closed state, so that the oil-gas-water multiphase fluid flows out through the installation pipeline inlet flange 27, the installation pipeline 1, the first control valve 2, the installation pipeline 1, and the installation pipeline outlet flange 28 in sequence, and does not enter the device, and the wellhead circuit system 31 does not acquire any data.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.

Claims (5)

1. A wellhead oil-gas-water three-phase flow impedance capacitance water content measuring device comprises a wellhead installation module, a gas-liquid separation system, a dynamic water content measuring system, a static water content measuring system, a control valve group and a data processing system, and is characterized in that,
the wellhead installation module comprises an installation pipeline, an installation pipeline inlet flange and an installation pipeline outlet flange, and the installation pipeline inlet flange and the installation pipeline outlet flange are respectively welded at two ends of the installation pipeline;
the gas-liquid separation system comprises a mixed phase inlet pipeline, a gas-liquid separation tank base, a first flange at the top of the gas-liquid separation tank, a second flange at the top of the gas-liquid separation tank, a wire connector, an exhaust valve, a first one-way valve, a gas phase outlet pipeline and a mixed phase outlet pipeline, wherein the mixed phase inlet pipeline, the gas-liquid separation tank base and the first flange at the gas-liquid separation tank are respectively welded on the gas-liquid separation tank, the wire connector, the mixed phase outlet pipeline and the gas phase outlet pipeline are respectively welded on the second flange at the top of the gas-liquid separation tank, the first flange at the top of the gas-liquid separation tank and the second flange at the top of the gas-liquid separation tank are in sealing connection in a standard flange connection mode, and the exhaust valve and the first one;
the dynamic water content measuring system comprises a stainless steel shell, a first impedance sensor, a second impedance sensor, a third impedance sensor and a wire outlet, wherein the stainless steel shell is provided with a liquid inlet and a microcirculation inlet, the first impedance sensor is installed between the liquid inlet and the microcirculation inlet, and the second impedance sensor and the third impedance sensor are sequentially installed above the liquid inlet;
the static water content measuring system comprises a static measuring pipeline, a static measuring pipeline top first flange, a static measuring pipeline top second flange, an electrode fixing block, a central electrode and a second one-way valve, wherein the bottom of the static measuring pipeline is welded on the gas-liquid separation tank, the static measuring pipeline top is welded with the static measuring pipeline top first flange, the static measuring pipeline is welded with a bypass pipe at the position below the static measuring pipeline top first flange and is in sealed communication with a second one-way valve liquid inlet, a second one-way valve liquid outlet is in sealed communication with the mixed phase outlet pipeline through a pipeline, the central electrode is hermetically arranged in the middle of the electrode fixing block, and the electrode fixing block is hermetically arranged on the static measuring pipeline top second flange;
the control valve group comprises a first control valve, a second control valve, a third control valve and a fourth control valve, the first control valve is installed on the installation pipeline, the mixed phase inlet pipeline and the installation pipeline are connected through the second control valve, the mixed phase outlet pipeline and the installation pipeline are connected through the third control valve, and the fourth control valve is installed at the bottom of the static measurement pipeline;
the data processing system comprises a wellhead circuit system, a wireless base station and a computer, the first control valve, the second control valve, the third control valve, the fourth control valve, the first impedance sensor, the second impedance sensor, the third impedance sensor and the central electrode are all connected with the wellhead circuit system, and the wellhead circuit system is in wireless data transmission with the computer through the wireless base station.
2. A wellhead oil-gas-water three-phase flow impedance capacitance water content measuring device as claimed in claim 1, wherein in the wellhead mounting module, the mounting pipeline is mounted with the first control valve in the middle in a sealing manner, the first control valve and the mounting pipeline inlet flange are connected with the liquid inlet of the second control valve in a sealing manner through a pipeline, and the first control valve and the mounting pipeline outlet flange are connected with the liquid outlet of the third control valve in a sealing manner through a pipeline.
3. The wellhead oil-gas-water three-phase flow impedance capacitance water content measuring device according to claim 1, characterized in that in the gas-liquid separation module, one end of the mixed phase inlet pipeline is hermetically connected with a liquid outlet of the second control valve; the other end of the mixed phase inlet pipeline is hermetically connected with the gas-liquid separation tank, one end of the mixed phase outlet pipeline is hermetically connected with the liquid inlet of the third control valve, and the other end of the mixed phase outlet pipeline is welded on a second flange at the top of the gas-liquid separation tank; one end of the gas-phase outlet pipeline is welded on the side wall of the mixed-phase outlet pipeline, the other end of the gas-phase outlet pipeline is welded on a second flange at the top of the gas-liquid separation tank, and the exhaust valve and the first one-way valve are sequentially and hermetically installed on the gas-phase outlet pipeline along the flowing direction of gas.
4. The wellhead oil-gas-water three-phase flow impedance capacitance water content measuring device according to claim 1, characterized in that the working process of the data processing system comprises the following steps:
(1) the computer sends a signal acquisition starting instruction to the wireless base station;
(2) the wireless base station sends a signal acquisition starting instruction sent by the computer to the wellhead circuit system;
(3) the wellhead circuit system receives a signal acquisition starting instruction sent by the wireless base station, realizes the flowing and stopping of fluid in the wellhead oil-gas-water three-phase flow impedance capacitance water content measuring device by controlling the on-off of the first control valve, the second control valve, the third control valve and the fourth control valve, acquires signals of the first impedance sensor, the second impedance sensor, the third impedance sensor and the central electrode, and finally sends the signals to the wireless base station;
(4) the wireless base station transmits the signals collected by the circuit system to the computer;
(5) the computer receives the signal sent by the wireless base station, sends a command for stopping signal acquisition to the wireless base station, and calculates, visualizes and stores the signal;
(6) the wireless base station sends a command for terminating signal acquisition sent by the computer to the wellhead circuit system;
(7) and the wellhead circuit system receives a termination signal acquisition instruction sent by the wireless base station and stops signal acquisition.
5. A control method of the impedance capacitance water content measuring device of the wellhead oil-gas-water three-phase flow according to any one of the claims 1 to 4, characterized by comprising the following steps,
(1) the computer sends a signal acquisition starting instruction to the wireless base station;
(2) the wireless base station sends a signal acquisition starting instruction sent by the computer to the wellhead circuit system;
(3) the wellhead circuit system receives a signal acquisition starting instruction sent by the wireless base station, and then controls the second control valve to be opened, the third control valve to be opened, the fourth control valve to be opened and the first control valve to be closed;
(4) the wellhead circuitry collects the first impedance sensor data, and collects the second impedance sensor and the third impedance sensor data;
(5) after a first waiting time, the fourth control valve is closed;
(6) after a second waiting time, the wellhead circuit system acquires the central electrode data;
(7) the wellhead circuit system sends the acquired data to the wireless base station;
(8) the wireless base station transmits the data collected by the circuit system to the computer;
(9) the computer performs data storage, dynamic water content calculation, static water content calculation and data display;
(10) the computer receives the data sent by the wireless base station, sends a command for stopping signal acquisition to the wireless base station, and calculates, visualizes and stores the signal;
(11) the wireless base station sends a command for terminating signal acquisition sent by the computer to the wellhead circuit system; and
(12) and the wellhead circuit system receives a termination signal acquisition instruction sent by the wireless base station, controls the first control valve to be opened, controls the second control valve to be closed, controls the third control valve to be closed, and stops data acquisition of the first impedance sensor, the second impedance sensor, the third impedance sensor and the central electrode.
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