CN105756665A - Rotational flow floating type oil well measurement device and method - Google Patents
Rotational flow floating type oil well measurement device and method Download PDFInfo
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- CN105756665A CN105756665A CN201610261351.7A CN201610261351A CN105756665A CN 105756665 A CN105756665 A CN 105756665A CN 201610261351 A CN201610261351 A CN 201610261351A CN 105756665 A CN105756665 A CN 105756665A
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- 239000003129 oil well Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000005259 measurement Methods 0.000 title abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 107
- 239000010779 crude oil Substances 0.000 claims description 40
- 238000010992 reflux Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 239000003208 petroleum Substances 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 13
- 239000011521 glass Substances 0.000 description 6
- 239000004576 sand Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000001739 density measurement Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Measuring Volume Flow (AREA)
- Geophysics (AREA)
Abstract
The invention provides a rotational flow floating type oil well measurement device and method and belongs to the technical field of petroleum well metering. The device comprises a bypass unit, a separator, an electric reversing valve, a meter regulator, a vertical tube unit and a vortex flowmeter, wherein the separator comprises a gas throttle device, a rotational flow spiral guide vane structure, a floater structure, a liquid throttle device and a cylinder, the diameter-to-height ratio of a piston of the meter regulator is (2:1)-(2.5:1), and the difference between the radial depth of a piston groove and the radial width of a piston ring is larger than 0.3 mm. The device is compact in structure, small in size, high in adaptability to flow fluctuation, and capable of achieving single-well liquid measurement, gas-liquid two-phase measurement and oil-gas-water three-phase measurement by the adoption of the modular design. Meanwhile, the moving vehicle load mode can be realized easily by the adoption of the structure, and the device can be applied to circulating measurement of marginal areas and low-yield areas conveniently.
Description
Technical Field
The invention belongs to the technical field of petroleum well metering, and particularly relates to a rotational flow floating type oil well metering device and method.
Background
The crude oil production is a mixed liquor containing, in addition to oil, water, gas, sand, etc. The existing oil field and well metering mainly depends on gas-liquid two-phase separation metering. The metering method is influenced by factors such as easy scaling and wax precipitation of the inner wall, low flow rate of part of oil wells, intermittent oil outlet problem and the like, and the metering error of the wellhead of the oil well is larger. The existing metering method of crude oil comprises the following steps:
the liquid level meter for glass tube is a communicating tube liquid level meter composed of high pressure glass tube and vertical separator, and is installed on the side wall of oil-gas separator, and the rising height of water column in glass tube is observed, and the scale value is read, and the time required for liquid level rising is recorded, so that the liquid level output in the time period is calculated. The liquid level measurement of the vertical glass tube is a common method for measuring the liquid level of a single well in China, and accounts for more than ninety percent of an oil well. Its advantages are simple structure and durable foundation. The defects of low automation level and high labor intensity of manual metering; crude oil is stuck on the inner wall, so that the crude oil is difficult to record by workers; the error of intermittent metering of crude oil is large; the normal metering of the oil well is influenced by the gas-liquid ratio.
And 2, measuring oil by a glass tube electrode, wherein the electrode oil is formed by installing an electrode in a separator, the electrode can automatically record the metering time, and the liquid yield in the time period is deduced according to the recorded liquid yield. The calculation also adopts a constant volume calculation method, and only the measurement and record are completely replaced by a meter. Therefore, complex switching operation is avoided, the influence of human errors is reduced, and remote measurement is facilitated. Compared with the liquid level measurement of the glass tube, the automatic level of water level recording and time recording of electrode measurement is improved. But the intermittent oil measurement is influenced by unstable gas production, the error is high, and the method has certain limitation when the water content is high and the gas-liquid ratio is low.
And 3, tipping bucket oil measurement, which is to measure the yield of the oil well by using a constant volume method. The skip bucket oil measurement has low requirement on the measured liquid, allows the measured liquid to contain foam and impurities, and has a simpler structure. According to the mechanical structure, when the metering dump bucket is converted from the oil discharging state to the oil feeding state, the metering dump bucket is not completed in time, but completed within a certain time, in the time, a part of liquid is leaked without being metered, the higher the yield, the larger the error is, and therefore the error must be calculated.
4, measuring oil in an overhead tank, separating output liquid of a single well, entering the overhead tank, and measuring crude oil; when the metering is carried out by a plurality of wells, the time interval is long. The method has the defects of high labor intensity of personnel, low precision, slow metering speed and incapability of implementing continuous metering. The degree of automation is low.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a rotational flow floating type oil well metering device and a rotational flow floating type oil well metering method, which are used for achieving the purposes of quickly separating gas and liquid, improving the gas purity, ensuring the accuracy of liquid volume metering and preventing sand in a produced liquid mixture from entering a meter gap.
A rotational flow floating type oil well metering device comprises a bypass unit, a separator, an electric reversing valve, a meter, a vertical pipe unit and a vortex flowmeter, wherein the separator is connected with a crude oil mixed liquid inlet, the upper end of the separator is connected with a crude oil outlet through a gas pipeline, and the gas pipeline is provided with the vortex flowmeter; the lower end of the separator is connected with the input end on one side of the electric reversing valve through a liquid pipeline, the output end on one side of the electric reversing valve is connected with the input end of the vertical pipe unit through a liquid pipeline, and the output end of the vertical pipe unit is connected with a crude oil outlet; two ends of the other side of the electric reversing valve are connected with two ends of the meter; one end of the bypass unit is connected with the crude oil mixed liquid inlet, and the other end of the bypass unit is connected with the crude oil outlet through a gas pipeline;
the separator comprises a gas throttling device, a rotational flow spiral guide vane structure, a floater structure, a liquid throttling device and a cylinder body; wherein,
the top of the cylinder body is provided with a gas pipeline, and a gas throttling device is arranged between the gas pipeline and the cylinder body; a liquid pipeline is arranged at the bottom of the cylinder body, and a liquid throttling device is arranged between the liquid pipeline and the cylinder body; the crude oil mixed liquid inlet is arranged in the circumferential tangential direction of the section of the upper part of the cylinder body; a rotational flow spiral guide vane structure is arranged inside the cylinder body;
the float structure comprises a float and an intermediate rod, the intermediate rod is fixed at the central position inside the cylinder body through a support, the float is fixedly connected with the intermediate rod and drives the intermediate rod to move up and down through the up-and-down floating of the float, the upper end of the intermediate rod is matched with an outlet of the gas throttling device, and the lower end of the intermediate rod is matched with an outlet of the liquid throttling device.
The metering device comprises a cylinder body, a piston ring and position sensors, wherein the position sensors are arranged at the top and the bottom of the cylinder body; the ratio of the piston diameter to the piston height is: 2: 1-2.5: 1; the difference between the radial depth of the piston groove and the radial width of the piston ring is greater than 0.3 mm.
The spiral angle range of the spiral guide vane structure of the rotational flow is 5-15 degrees.
The metering method by adopting the rotational flow floating type oil well metering device comprises the following steps:
the method comprises the following steps that 1, produced liquid enters a separator through a crude oil inlet in a tangential direction, the produced liquid is separated into gas and liquid through a spiral guide vane structure in the separator, wherein the gas enters a vortex gas flowmeter through the top, and the liquid enters an electric reversing valve through the bottom;
step 2, the gas enters a vortex flowmeter through a pipeline to obtain the gas flow;
step 3, liquid enters the electric reversing valve through a pipeline, the electric reversing valve switches the direction of the liquid entering the metering device, namely the liquid enters the cylinder body from the bottom or the top of the metering device, the liquid pushes the piston in the metering cylinder body to move upwards or downwards, when the piston moves to the top or the bottom of the cylinder body, the position sensor sends a signal to control the electric reversing valve to reverse, and the volume flow of the oil well is obtained according to the reciprocating times of the plunger;
step 4, detecting the temperature, the pressure and the density of the liquid by adopting a vertical pipe unit, and further obtaining the liquid yield of the crude oil of the oil well;
and 5, when an accident occurs, automatically opening a safety reflux valve in the bypass unit, and allowing the produced liquid to flow to a crude oil outlet through a gas bypass channel.
The invention has the advantages that:
in order to adapt to the metering requirements of dispersed oil wells and oil wells limited by insufficient ground oil collecting pipelines, and the characteristics of large flow difference, gas, water, sand and the like, the invention provides a rotational flow floating type oil well metering device and method, the device has compact structure, small volume and strong adaptability to flow fluctuation, and the modular design can meet the requirements of single-well liquid measurement, gas-liquid two-phase measurement and oil-gas-water three-phase measurement; meanwhile, the structure is easy to realize a mobile vehicle-mounted mode, and can be conveniently applied to the cyclic measurement of edge areas and low-yield areas.
Drawings
FIG. 1 is a schematic structural diagram of a rotational flow floating type oil well metering device according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a separator according to an embodiment of the present invention, wherein FIG. (a) is a front view and FIG. (b) is a top view;
FIG. 3 is a schematic structural diagram of an embodiment of the present invention, wherein FIG. (a) is a front view and FIG. (b) is a partially enlarged view;
FIG. 4 is a flow chart of a rotational flow floating type oil well metering method according to an embodiment of the invention.
Detailed Description
An embodiment of the present invention will be further described with reference to the accompanying drawings.
In the embodiment of the invention, as shown in fig. 1, the rotational flow floating type oil well metering device comprises a bypass unit a, a separator b, an electric reversing valve c, a meter d, a standpipe unit e and a rotational flow meter f, wherein the separator b is used for performing gas-liquid separation on produced liquid entering through a crude oil inlet, gas enters a rotational flow gas meter through the top, and liquid enters the electric reversing valve c through the bottom; the electric reversing valve c is used for switching liquid to enter the cylinder of the metering device d from the bottom or the top of the metering device d; the meter d is used for obtaining the volume flow of the oil well according to the times of the liquid pushing the plunger in the metering cylinder body to move upwards or downwards; the standpipe unit e is used for detecting the temperature, the pressure and the density of the liquid; the vortex flowmeter f is used for metering the gas flow; the bypass unit a is used for opening a safety reflux valve therein when an accident occurs, and the produced liquid flows to a crude oil outlet through a gas bypass channel;
in the embodiment of the invention, a temperature sensor (model: WZPKJ-248), a pressure sensor (model: FB0803E3Rd) and a density sensor (model: MD3051A10F2H 15/model: WS3051-EMD13L1IA1A51H1-YE) are arranged in a standpipe unit E; a safety return valve (model: AHN42F-25C) is arranged inside the bypass unit a; the vortex gas flowmeter f adopts a LUY-BIIS 21-025-;
in the embodiment of the invention, as shown in fig. 2 (a) and (b), the separator b comprises a gas pipeline 1, a gas throttling device 2, a spiral guide vane structure 3, a floater structure 5, a liquid throttling device 6, a cylinder, a crude oil mixed liquid inlet 4 and a liquid pipeline 7; wherein, the top of the cylinder body is provided with a gas pipeline 1, and a gas throttling device 2 is arranged between the gas pipeline 1 and the cylinder body; a liquid pipeline 7 is arranged at the bottom of the cylinder body, and a liquid throttling device 6 is arranged between the liquid pipeline 7 and the cylinder body; the crude oil mixed liquid inlet 4 is arranged in the circumferential tangential direction of the section of the upper part of the cylinder body; a rotational flow spiral guide vane structure 3 is arranged inside the cylinder body; the floater structure 5 comprises a floater and an intermediate rod, the intermediate rod is fixed at the central position in the cylinder body through a support, the floater is fixedly connected with the intermediate rod and drives the intermediate rod to move up and down through the up-and-down floating of the floater, the upper end (spherical) of the intermediate rod is matched with an outlet of the gas throttling device 2, and the lower end (spherical) of the intermediate rod is matched with an outlet of the liquid throttling device 6; the spiral angle range of the spiral guide vane structure 3 of the rotational flow is 5-15 degrees.
In the embodiment of the invention, a rotational flow spiral guide vane structure is adopted to rapidly separate gas from liquid, the gas purity is improved through a cyclone flow guiding element, the liquid throttling device 6 and the gas throttling device 2 ensure that the liquid level in the separator is stable, the gas flows out of the top of the separator and enters a vortex flowmeter, and the liquid flows out of the lower part of the separator and enters a floating metering oil cylinder.
In the embodiment of the present invention, as shown in fig. 3 (a) and (b), the gauge d includes a cylinder 8, a piston 9, a piston ring 10, and a position sensor (not shown in the figure), wherein the position sensor is disposed on the top and bottom of the cylinder 8; the matching relation between the piston 9 and the cylinder body 8 of the metering cylinder and between the piston 9 and the piston ring 10, namely when the ratio of the diameter of the piston to the height of the piston is between 2: 1 and 2.5: 1, the manufacturing cost of the metering device can be reduced; the fit relation between the piston groove 11 and the piston ring 10, namely the radial depth of the piston groove is 0.3mm greater than the radial width of the piston ring, can avoid the problems of damage to the cylinder body and the piston and inaccurate measurement caused by locking of the piston ring due to the fact that sand in the crude oil mixture enters the fit clearance.
In the embodiment of the invention, the metering method is implemented by adopting a rotational flow floating type oil well metering device, and the flow chart of the method is shown in figure 4, and the method comprises the following steps:
the method comprises the following steps that 1, produced liquid enters a separator through a crude oil inlet in a tangential direction, the produced liquid is separated into gas and liquid through a spiral guide vane structure in the separator, wherein the gas enters a vortex gas flowmeter through the top, and the liquid enters an electric reversing valve through the bottom;
in the embodiment of the invention, the crude oil in the pipeline tangentially enters the cylinder of the separator, and the flow cross section area is suddenly increased, so that the internal pressure of the crude oil mixed liquid is released, and the gas contained in the crude oil is easy to separate; by utilizing the principle of density difference between liquid and gas, crude oil enters a cylinder of the separator at a certain tangential speed and is vertical to a gravity field, and the inertial centrifugal force is more favorably increased due to the change of the radius R of the circular cylinder wall; under the double actions of a gravity field and a spiral guide vane, liquid with high density clings to a circular pipe wall to be settled, gas with low density is extruded into a gas column to overflow upwards, and the spiral guide vane structure arranged in the cylinder according to the flow rate enables the settling velocity of the crude oil to be in an idealized controlled state, so that the gas separation efficiency can be improved;
in the embodiment of the invention, as shown in fig. 1, the dashed arrows of the gas indicate that the gas separated by the separator passes through the channel on the separator, namely the gas channel; as indicated by the solid liquid arrows in fig. 1, the liquid separated by the separator accumulates to an amount that causes the float disposed in the chamber to lift open the liquid regulating device 6 and simultaneously close the gas regulating device 2, and the liquid passes through the lower passage of the separator;
and 2, the gas enters a vortex flowmeter through a pipeline to obtain the gas flow, and the gas is measured by the gas meter and then discharged through a crude oil outlet.
Step 3, liquid enters the electric reversing valve through a pipeline, the electric reversing valve switches the direction of the liquid entering the metering device, namely the liquid enters the cylinder body from the bottom or the top of the metering device, the liquid pushes the piston in the metering cylinder body to move upwards or downwards, when the piston moves to the top or the bottom of the cylinder body, the position sensor sends a signal to control the electric reversing valve to reverse, and the volume flow of the oil well is obtained according to the reciprocating times of the plunger;
in an embodiment of the invention, the dosing unit is constituted by a dosing cylinder with a floating piston. After the crude oil enters the metering device, the floating piston in the metering cylinder is pushed to move. The two ends of a metering cylinder in the metering unit are provided with position sensors, when liquid pushes a piston to move to the top or the bottom of a cylinder body, the position sensors can send reversing instructions to an electric reversing valve in advance to enable the electric reversing valve to start reversing, a floating piston moves in the opposite direction, the reversing is carried out, liquid produced by crude oil flows out after the volume of the liquid is determined by the metering cylinder, and the liquid enters a vertical pipe unit to carry out density measurement.
Step 4, detecting the temperature, the pressure and the density of the liquid by adopting a vertical pipe unit, and further obtaining the liquid yield of the crude oil of the oil well;
and 5, when an accident occurs, automatically opening a safety reflux valve in the bypass unit, and allowing the produced liquid to flow to a crude oil outlet through a gas bypass channel.
Claims (4)
1. A rotational flow floating type oil well metering device is characterized by comprising a bypass unit, a separator, an electric reversing valve, a meter, a vertical pipe unit and a vortex flowmeter, wherein the separator is connected with a crude oil mixed liquid inlet, the upper end of the separator is connected with a crude oil outlet through a gas pipeline, and the gas pipeline is provided with the vortex flowmeter; the lower end of the separator is connected with the input end on one side of the electric reversing valve through a liquid pipeline, the output end on one side of the electric reversing valve is connected with the input end of the vertical pipe unit through a liquid pipeline, and the output end of the vertical pipe unit is connected with a crude oil outlet; two ends of the other side of the electric reversing valve are connected with two ends of the meter; one end of the bypass unit is connected with the crude oil mixed liquid inlet, and the other end of the bypass unit is connected with the crude oil outlet through a gas pipeline;
the separator comprises a gas throttling device, a rotational flow spiral guide vane structure, a floater structure, a liquid throttling device and a cylinder body; wherein,
the top of the cylinder body is provided with a gas pipeline, and a gas throttling device is arranged between the gas pipeline and the cylinder body; a liquid pipeline is arranged at the bottom of the cylinder body, and a liquid throttling device is arranged between the liquid pipeline and the cylinder body; the crude oil mixed liquid inlet is arranged in the circumferential tangential direction of the section of the upper part of the cylinder body; a rotational flow spiral guide vane structure is arranged inside the cylinder body;
the float structure comprises a float and an intermediate rod, the intermediate rod is fixed at the central position inside the cylinder body through a support, the float is fixedly connected with the intermediate rod and drives the intermediate rod to move up and down through the up-and-down floating of the float, the upper end of the intermediate rod is matched with an outlet of the gas throttling device, and the lower end of the intermediate rod is matched with an outlet of the liquid throttling device.
2. The vortex floating oil well metering device of claim 1, wherein the meter comprises a cylinder, a piston ring and a position sensor, wherein the position sensor is arranged at the top and the bottom of the cylinder; the ratio of the piston diameter to the piston height is: 2: 1-2.5: 1; the difference between the radial depth of the piston groove and the radial width of the piston ring is greater than 0.3 mm.
3. The spiral flow floating oil well metering device of claim 1, wherein the spiral angle of the spiral flow spiral guide vane structure is in the range of 5-15 °.
4. The method of metering using the spiral flow floating oil well metering device of claim 1, comprising the steps of:
the method comprises the following steps that 1, produced liquid enters a separator through a crude oil inlet in a tangential direction, the produced liquid is separated into gas and liquid through a spiral guide vane structure in the separator, wherein the gas enters a vortex gas flowmeter through the top, and the liquid enters an electric reversing valve through the bottom;
step 2, the gas enters a vortex flowmeter through a pipeline to obtain the gas flow;
step 3, liquid enters the electric reversing valve through a pipeline, the electric reversing valve switches the direction of the liquid entering the metering device, namely the liquid enters the cylinder body from the bottom or the top of the metering device, the liquid pushes the piston in the metering cylinder body to move upwards or downwards, when the piston moves to the top or the bottom of the cylinder body, the position sensor sends a signal to control the electric reversing valve to reverse, and the volume flow of the oil well is obtained according to the reciprocating times of the plunger;
step 4, detecting the temperature, the pressure and the density of the liquid by adopting a vertical pipe unit, and further obtaining the liquid yield of the crude oil of the oil well;
and 5, when an accident occurs, automatically opening a safety reflux valve in the bypass unit, and allowing the produced liquid to flow to a crude oil outlet through a gas bypass channel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610261351.7A CN105756665A (en) | 2016-04-19 | 2016-04-19 | Rotational flow floating type oil well measurement device and method |
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| CN201610261351.7A CN105756665A (en) | 2016-04-19 | 2016-04-19 | Rotational flow floating type oil well measurement device and method |
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| CN201610261351.7A Pending CN105756665A (en) | 2016-04-19 | 2016-04-19 | Rotational flow floating type oil well measurement device and method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106121625A (en) * | 2016-08-23 | 2016-11-16 | 陕西景行环保科技有限公司 | Oil pumper special gas, oil, water three-phase flow rate meter and method of calculating flux |
| CN106285625A (en) * | 2016-08-10 | 2017-01-04 | 北京富机达能电气产品股份有限公司 | A kind of metering device |
| CN108952680A (en) * | 2018-09-25 | 2018-12-07 | 王明显 | Super petroleum production fluid meter |
| CN109538188A (en) * | 2019-02-01 | 2019-03-29 | 杨元亮 | A kind of radiation source consecutive automatic scale shutter |
| CN110424946A (en) * | 2019-08-23 | 2019-11-08 | 董向军 | Single well metering device, individual well and one-well metering method |
| CN110470355A (en) * | 2019-09-16 | 2019-11-19 | 西安德汇石油开发科技有限公司 | A kind of piston type volumetric method apparatus for metering fluids and metering method |
| CN112267869A (en) * | 2019-07-08 | 2021-01-26 | 中国石油天然气股份有限公司 | Metering device for oilfield single-well produced liquid and use method |
| CN113323644A (en) * | 2021-06-30 | 2021-08-31 | 中国石油大学(华东) | Gas sand, water sand or gas-water sand multiphase separation and sand collection metering device |
| CN114485825A (en) * | 2022-01-17 | 2022-05-13 | 中国计量大学 | Simple gas-liquid two-phase flow comprehensive measuring device |
| CN118208232A (en) * | 2024-05-21 | 2024-06-18 | 四川新华林自控科技有限公司 | Fluid metering system |
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Application publication date: 20160713 |