CN112196511A - Gas-liquid separation tank type oil-gas-water multiphase flowmeter - Google Patents
Gas-liquid separation tank type oil-gas-water multiphase flowmeter Download PDFInfo
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- CN112196511A CN112196511A CN202011041187.1A CN202011041187A CN112196511A CN 112196511 A CN112196511 A CN 112196511A CN 202011041187 A CN202011041187 A CN 202011041187A CN 112196511 A CN112196511 A CN 112196511A
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- gas
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- separation tank
- liquid level
- liquid separation
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
Abstract
The invention discloses a gas-liquid separation tank type oil-gas-water multiphase flowmeter, wherein an upper tuning fork liquid level switch and a lower tuning fork liquid level switch are respectively arranged at the upper end and the lower end of a gas-liquid separation tank; the liquid level height of a liquid outlet of the liquid outlet pipe is set to be consistent with that of a lower tuning fork liquid level switch, and a gear pump is arranged on a pipeline extending from the liquid outlet pipe to the outside of the gas-liquid separation tank; the liquid with the volume between the liquid level heights of the upper tuning fork liquid level switch and the lower tuning fork liquid level switch is emptied through the gear pump, so that the measurement of the oil-water two-phase volume flow is realized. Liquid level detection and control are realized through a liquid level switch, and intake and discharge control and total density detection of the enclosed liquid are realized by matching with a differential pressure gauge; the liquid in the volume enclosed by the liquid level switch is emptied by the gear pump, so that the oil-water two-phase volume flow is measured. Convenient and fast operation, high accuracy and good practical applicability.
Description
Technical Field
The invention belongs to the field of oil-gas-water multiphase metering equipment for single well metering in an oil field, and particularly relates to a gas-liquid separation tank type oil-gas-water multiphase flowmeter.
Background
The on-line measurement of oil-water-gas multiphase fluid has great economic value in oil field exploitation, especially offshore oil fields and onshore oil fields. The traditional metering method is that crude oil produced by an oil well is sent into a three-phase separator, the crude oil is divided into oil, water and gas three phases through the separator, and then three fluids are respectively metered through flow meters arranged at outlets of all phases of the separator; however, the traditional gas-liquid separators have complex structures, large sizes and high cost, increase great difficulty for design and manufacture, and reduce the practicability of the multiphase flowmeter; the gas-liquid separating tank is common equipment in oil fields, is used for metering and detecting gas production and liquid production metering of a single well in large quantity, cannot meter the oil-water ratio, needs to be lofted at a well mouth and sent to a laboratory for testing water content, and is time-consuming and labor-consuming.
Disclosure of Invention
The invention aims to provide a gas-liquid separation tank type oil-gas-water multiphase flowmeter, aiming at the technical problems that a gas-liquid separation tank in the prior art cannot measure the oil-water ratio and is time-consuming and labor-consuming.
The technical scheme adopted by the invention is as follows:
a gas-liquid separation tank type oil-gas-water multiphase flowmeter comprises a gas-liquid separation tank,
the top end of the gas-liquid separation tank is connected with an exhaust pipe, and the end part of the exhaust pipe extending into the gas-liquid separation tank is provided with a gas outlet;
the top end of the gas-liquid separation tank is connected with a liquid inlet pipe, and a liquid inlet is formed in the end part of the liquid inlet pipe extending into the gas-liquid separation tank; the bottom end of the gas-liquid separation tank is connected with a liquid outlet pipe, and a liquid outlet is formed in the end part of the liquid outlet pipe extending into the gas-liquid separation tank;
an upper tuning fork liquid level switch and a lower tuning fork liquid level switch are respectively arranged at the upper end and the lower end of the gas-liquid separation tank, and a differential pressure transmitter is arranged between the liquid level height of the upper tuning fork liquid level switch and the liquid level height of the lower tuning fork liquid level switch in the gas-liquid separation tank;
the liquid level height of the liquid outlet is set to be consistent with that of the lower tuning fork liquid level switch, and a gear pump is arranged on a pipeline of the liquid outlet pipe extending out of the gas-liquid separation tank;
the liquid with the volume between the liquid level heights of the upper tuning fork liquid level switch and the lower tuning fork liquid level switch is emptied through the gear pump, so that the measurement of the oil-water two-phase volume flow is realized.
Furthermore, an ultrasonic flowmeter and a one-way valve are sequentially arranged on a pipeline of the exhaust pipe extending out of the gas-liquid separation tank, and a gas outlet of the exhaust pipe is communicated with the tail end of the liquid outlet pipe.
Furthermore, the gas in the gas-liquid separation tank enters the exhaust pipe along the gas outlet, and the gas flow is independently measured through the ultrasonic flowmeter.
Furthermore, liquid level detection and control are realized through the upper tuning fork liquid level switch and the lower tuning fork liquid level switch, and the feeding and discharging control and the total density detection of liquid in the volume between the liquid level heights of the upper tuning fork liquid level switch and the lower tuning fork liquid level switch are realized by matching with a differential pressure transmitter.
Further, the volume flow of the oil-water two-phase is calculated by the following formula:
calculating the total density: since Δ p is ρ gh, Δ p is equal to ρ gh
Oil-water volume flow:
the total volume of the extracted liquid is VGeneral assemblyThe total volume of liquid and the density of oil and water in the formula are known quantities, and the total volume of liquid and the density of oil and water can be solved by solving the equationVolumetric flow of oil and water.
Furthermore, a separation umbrella is arranged inside the gas-liquid separation tank, liquid is input into the gas-liquid separation tank through a liquid inlet pipe, and gas-liquid separation is realized through the separation umbrella.
Further, the tip that the feed liquor pipe extends to outside the gas-liquid separation jar is provided with the entry solenoid valve, and the tip that the drain pipe extends to outside the gas-liquid separation jar is provided with the outlet solenoid valve, entry solenoid valve, last tuning fork liquid level switch, lower tuning fork liquid level switch, gear pump, outlet solenoid valve are connected through circuit and PCL controller respectively, through opening and close of PCL controller control entry solenoid valve, outlet solenoid valve or gear pump.
The invention has the beneficial effects that:
the invention utilizes the physics knowledge of the liquid level height difference and combines the mechanistic principle, designs a gas-liquid separation tank system for measuring oil, gas and water three phases, realizes liquid level detection and control through a liquid level switch, and realizes the inlet and outlet control and total density detection of the enclosed liquid by matching with a differential pressure gauge; the liquid in the volume enclosed by the liquid level switch is emptied by the gear pump, so that the oil-water two-phase volume flow is measured. Convenient and fast operation, high accuracy and good practical applicability.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Wherein, 1, an inlet electromagnetic valve; 2. an upper tuning fork liquid level switch; 3. a liquid inlet pipe; 4. a lower tuning fork liquid level switch; 5. a gas-liquid separation tank; 6. a liquid inlet; 7. an air outlet; 8. an ultrasonic flow meter; 9. a one-way valve; 10. a differential pressure transmitter; 11. a liquid outlet; 12. an outlet solenoid valve; 13. a gear pump; 14. a liquid outlet pipe; 15. and an air outlet pipe.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1
As shown in fig. 1, the gas-liquid separation tank type oil-gas-water multiphase flowmeter comprises a gas-liquid separation tank 5,
the top end of the gas-liquid separation tank 5 is connected with an exhaust pipe, and the end part of the exhaust pipe extending into the gas-liquid separation tank 5 is provided with a gas outlet 7;
the top end of the gas-liquid separation tank 5 is connected with a liquid inlet pipe 3, and a liquid inlet 6 is arranged at the end part of the liquid inlet pipe 3 extending into the gas-liquid separation tank 5; the bottom end of the gas-liquid separation tank 5 is connected with a liquid outlet pipe 14, and a liquid outlet 11 is arranged at the end part of the liquid outlet pipe 14 extending into the gas-liquid separation tank 5;
an upper tuning fork liquid level switch 2 and a lower tuning fork liquid level switch 4 are respectively arranged at the upper end and the lower end of the gas-liquid separation tank 5, and a differential pressure transmitter 10 is arranged between the liquid level height of the upper tuning fork liquid level switch 2 and the liquid level height of the lower tuning fork liquid level switch 4 in the gas-liquid separation tank 5;
the liquid level height of the liquid outlet 11 is set to be consistent with that of the lower tuning fork liquid level switch 4, and a liquid outlet pipe 14 extends to a pipeline outside the gas-liquid separation tank 5 and is connected with a gear pump 13 through an outlet electromagnetic valve 12;
the liquid with the volume between the liquid level heights of the upper tuning fork liquid level switch 2 and the lower tuning fork liquid level switch 4 is emptied through the gear pump 13, so that the oil-water two-phase volume flow measurement is realized.
Liquid level detection and control are realized through the upper tuning fork liquid level switch 2 and the lower tuning fork liquid level switch 4, and the liquid inlet and outlet control and the total density detection of the volume of liquid between the liquid level heights of the upper tuning fork liquid level switch 2 and the lower tuning fork liquid level switch 4 are realized through matching with the differential pressure transmitter 10.
The inside separation umbrella that is provided with of gas-liquid separation jar 5, liquid realize gas-liquid separation through the separation umbrella in liquid inlet pipe 3 input gas-liquid separation jar 5.
The end part of the liquid inlet pipe 3 extending to the outside of the gas-liquid separation tank 5 is provided with an inlet electromagnetic valve 1, the end part of the liquid outlet pipe 14 extending to the outside of the gas-liquid separation tank 5 is provided with an outlet electromagnetic valve 12, the inlet electromagnetic valve 1, the upper tuning fork liquid level switch 2, the lower tuning fork liquid level switch 4, the gear pump 13 and the outlet electromagnetic valve 12 are respectively connected with a PCL controller through circuits, and the opening and closing of the inlet electromagnetic valve 1, the outlet electromagnetic valve 12 or the gear pump 13 are controlled through the PCL controller.
The specific operation process and principle of the invention are as follows:
the invention discloses a gas-liquid separation tank 5 system for metering oil, gas and water three phases, which is a low-cost system and can realize real-time metering, wherein a PCL controller is used for controlling an inlet electromagnetic valve 1 to be opened, liquid circulates along a liquid inlet pipe 3, the liquid enters the gas-liquid separation tank 5 from the tank top through a liquid inlet 6 at the top end of the gas-liquid separation tank 5, the liquid is sprayed on a separation umbrella to realize gas-liquid separation, the water level of bottom water preset in the gas-liquid separation tank 5 reaches the water level height of a lower tuning fork liquid level switch 4 (to the height of a lower dotted line in figure 1), namely, after the liquid is continuously input for a period of time, the middle liquid level in the gas-liquid separation tank 5 reaches an upper tuning fork liquid level switch 2 (to the height of an upper dotted line in figure 1), the upper tuning fork liquid level switch 2 outputs an instruction signal to the PCL controller, the PCL controller is used for controlling the inlet electromagnetic valve 1 at the port of the liquid inlet pipe 3 to, and converted to total density.
Calculating the total density: since Δ p is ρ gh, Δ p is equal to ρ gh
After the measurement is completed, the outlet electromagnetic valve 12 on the PCL controller control liquid outlet pipe 14 is opened, the gear pump 13 is started to pump liquid, when the liquid level drops to the position of the lower tuning fork liquid level switch 4, the lower tuning fork liquid level switch 4 outputs an instruction signal to the PCL controller, the PCL controller outputs a pump stopping signal, the gear pump 13 is closed, the outlet electromagnetic valve 12 is closed simultaneously, and the inlet electromagnetic valve 1 is opened to feed liquid again for metering next time. The total amount of the liquid extracted this time is VGeneral assemblyVolume flow V of oil-water two-phase flowOilVWater (W)Is calculated as follows:
oil-water volume flow:
the total volume of the liquid and the density of the oil and the water are known quantities, and the volume flow of the oil and the water can be obtained by solving an equation.
The pipeline that the blast pipe extends to outside gas-liquid separation jar 5 is last to be provided with ultrasonic flowmeter 8 and check valve 9 in proper order, and the end intercommunication of gas outlet 7 and drain pipe 14 of blast pipe, the gas in the gas-liquid separation jar 5 gets into the blast pipe along gas outlet 7, measures gas flow alone through ultrasonic flowmeter 8.
More specifically, the gas is metered through the gas outlet pipe 15 at the top of the gas-liquid separation tank 5, and the gas flow is separately metered through the ultrasonic flowmeter 8.
The above description is not meant to be limiting, it being noted that: it will be apparent to those skilled in the art that various changes, modifications, additions and substitutions can be made without departing from the true scope of the invention, and these improvements and modifications should also be construed as within the scope of the invention.
Claims (7)
1. A gas-liquid separation tank type oil-gas-water multiphase flowmeter is characterized by comprising a gas-liquid separation tank,
the top end of the gas-liquid separation tank is connected with an exhaust pipe, and the end part of the exhaust pipe extending into the gas-liquid separation tank is provided with a gas outlet;
the top end of the gas-liquid separation tank is connected with a liquid inlet pipe, and a liquid inlet is formed in the end part of the liquid inlet pipe extending into the gas-liquid separation tank; the bottom end of the gas-liquid separation tank is connected with a liquid outlet pipe, and a liquid outlet is formed in the end part of the liquid outlet pipe extending into the gas-liquid separation tank;
an upper tuning fork liquid level switch and a lower tuning fork liquid level switch are respectively arranged at the upper end and the lower end of the gas-liquid separation tank, and a differential pressure transmitter is arranged between the liquid level height of the upper tuning fork liquid level switch and the liquid level height of the lower tuning fork liquid level switch in the gas-liquid separation tank;
the liquid level height of the liquid outlet is set to be consistent with that of the lower tuning fork liquid level switch, and a gear pump is arranged on a pipeline of the liquid outlet pipe extending out of the gas-liquid separation tank;
the liquid with the volume between the liquid level heights of the upper tuning fork liquid level switch and the lower tuning fork liquid level switch is emptied through the gear pump, so that the measurement of the oil-water two-phase volume flow is realized.
2. The gas-liquid separation tank type oil-gas-water multiphase flowmeter as claimed in claim 1, wherein an ultrasonic flowmeter and a one-way valve are sequentially arranged on a pipeline of the exhaust pipe extending out of the gas-liquid separation tank, and a gas outlet of the exhaust pipe is communicated with the tail end of the liquid outlet pipe.
3. The gas-liquid separation tank type oil-gas-water multiphase flowmeter as claimed in claim 2, wherein gas in the gas-liquid separation tank enters the exhaust pipe along the gas outlet, and the gas flow is separately measured by the ultrasonic flowmeter.
4. The gas-liquid separation tank type oil-gas-water multiphase flowmeter according to claim 1, wherein liquid level detection and control are realized by an upper tuning fork liquid level switch and a lower tuning fork liquid level switch, and liquid inlet and outlet control and total density detection of the volume between the liquid level heights of the upper tuning fork liquid level switch and the lower tuning fork liquid level switch are realized by matching with a differential pressure transmitter.
5. The gas-liquid separation tank type oil-gas-water multiphase flowmeter according to claim 1 or 4, wherein the volume flow of the oil-water two-phase is calculated by the following formula:
calculating the total density: since Δ p is ρ gh, Δ p is equal to ρ gh
Oil-water volume flow:
the total volume of the extracted liquid is VGeneral assemblyThe total volume of liquid and the density of oil and water in the formula are known quantities, and the volume flow of oil and water can be obtained by solving the equation.
6. The gas-liquid separation tank type oil-gas-water multiphase flowmeter as claimed in claim 1, wherein a separation umbrella is arranged inside the gas-liquid separation tank, liquid is fed into the gas-liquid separation tank through a liquid inlet pipe, and gas-liquid separation is realized through the separation umbrella.
7. The gas-liquid separation tank type oil-gas-water multiphase flowmeter according to claim 1, wherein an inlet solenoid valve is arranged at the end of the liquid inlet pipe extending out of the gas-liquid separation tank, an outlet solenoid valve is arranged at the end of the liquid outlet pipe extending out of the gas-liquid separation tank, the inlet solenoid valve, the upper tuning fork liquid level switch, the lower tuning fork liquid level switch, the gear pump and the outlet solenoid valve are respectively connected with a PCL controller through circuits, and the PCL controller controls the opening and closing of the inlet solenoid valve, the outlet solenoid valve or the gear pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011041187.1A CN112196511A (en) | 2020-09-28 | 2020-09-28 | Gas-liquid separation tank type oil-gas-water multiphase flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011041187.1A CN112196511A (en) | 2020-09-28 | 2020-09-28 | Gas-liquid separation tank type oil-gas-water multiphase flowmeter |
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| Publication Number | Publication Date |
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| CN112196511A true CN112196511A (en) | 2021-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011041187.1A Pending CN112196511A (en) | 2020-09-28 | 2020-09-28 | Gas-liquid separation tank type oil-gas-water multiphase flowmeter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113082775A (en) * | 2021-03-31 | 2021-07-09 | 张田田 | Chemical solution separating tank |
| CN115680603A (en) * | 2021-07-26 | 2023-02-03 | 中国石油天然气股份有限公司 | Device for controlling degassing of wellhead of carbon dioxide huff-puff well |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2394225Y (en) * | 1999-11-22 | 2000-08-30 | 张学斌 | Automatic oil metering and gas testing device for single well |
| CN2651718Y (en) * | 2003-10-30 | 2004-10-27 | 浙江大学 | Automatic metering installation of oil well and oil gas water three-phase flow |
| CN201635722U (en) * | 2010-03-22 | 2010-11-17 | 天津大港油田科远石油工程有限责任公司 | Single-well three-phase automatic metering device of oil field |
| CN201892552U (en) * | 2010-08-09 | 2011-07-06 | 福州昌晖自动化系统有限公司 | Oil, gas and water multiphase flowmeter |
| CN103835696A (en) * | 2012-11-22 | 2014-06-04 | 上海一诺仪表有限公司 | Single-well metering device |
-
2020
- 2020-09-28 CN CN202011041187.1A patent/CN112196511A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2394225Y (en) * | 1999-11-22 | 2000-08-30 | 张学斌 | Automatic oil metering and gas testing device for single well |
| CN2651718Y (en) * | 2003-10-30 | 2004-10-27 | 浙江大学 | Automatic metering installation of oil well and oil gas water three-phase flow |
| CN201635722U (en) * | 2010-03-22 | 2010-11-17 | 天津大港油田科远石油工程有限责任公司 | Single-well three-phase automatic metering device of oil field |
| CN201892552U (en) * | 2010-08-09 | 2011-07-06 | 福州昌晖自动化系统有限公司 | Oil, gas and water multiphase flowmeter |
| CN103835696A (en) * | 2012-11-22 | 2014-06-04 | 上海一诺仪表有限公司 | Single-well metering device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113082775A (en) * | 2021-03-31 | 2021-07-09 | 张田田 | Chemical solution separating tank |
| CN113082775B (en) * | 2021-03-31 | 2022-07-29 | 山东龙华生物股份有限公司 | Chemical solution separating tank |
| CN115680603A (en) * | 2021-07-26 | 2023-02-03 | 中国石油天然气股份有限公司 | Device for controlling degassing of wellhead of carbon dioxide huff-puff well |
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Application publication date: 20210108 |