CN112452565A - Cyclone for multiphase flow measurement and measurement system - Google Patents
Cyclone for multiphase flow measurement and measurement system Download PDFInfo
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- CN112452565A CN112452565A CN202011202863.9A CN202011202863A CN112452565A CN 112452565 A CN112452565 A CN 112452565A CN 202011202863 A CN202011202863 A CN 202011202863A CN 112452565 A CN112452565 A CN 112452565A
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- 238000005259 measurement Methods 0.000 title claims abstract description 49
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 11
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 4
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 4
- 241001330002 Bambuseae Species 0.000 claims description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 4
- 238000003556 assay Methods 0.000 claims description 4
- 239000011425 bamboo Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- 239000012071 phase Substances 0.000 abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 31
- 239000007788 liquid Substances 0.000 abstract description 8
- 238000009434 installation Methods 0.000 abstract description 6
- 239000007791 liquid phase Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 12
- 235000019198 oils Nutrition 0.000 description 12
- 239000000203 mixture Substances 0.000 description 11
- 239000012530 fluid Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 7
- 230000001464 adherent effect Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 238000004088 simulation Methods 0.000 description 4
- 230000033558 biomineral tissue development Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 2
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 235000019476 oil-water mixture Nutrition 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/08—Vortex chamber constructions
- B04C5/103—Bodies or members, e.g. bulkheads, guides, in the vortex chamber
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N22/00—Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more
- G01N22/04—Investigating moisture content
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
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- General Health & Medical Sciences (AREA)
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Abstract
The invention discloses a cyclone for measuring multiphase flow, which can effectively separate gas phase from liquid phase in three-phase flow and has a standard flow pattern, and comprises an outer support cylinder, wherein three cyclone blades are arranged in the outer support cylinder, are obliquely arranged relative to the central line of the outer support cylinder, and are annularly and uniformly distributed; the multiphase flow measuring system comprises an installation body, a measuring hole penetrates through the installation body in a straight line, the upstream section of the measuring hole is provided with the cyclone for multiphase flow measurement, and the downstream section of the measuring hole is provided with a microwave detection antenna. The invention has the obvious effects that the three-phase flow is separated into gas phase and liquid phase with obvious boundaries through the rectification action of the cyclone, wherein the gas phase is converged in the center of the pipeline to form gas core flow, and the liquid phase (oil phase and water phase) forms a liquid film which is attached to the inner side of the pipe wall to flow, so that the parameters such as gas content, water content and the like can be accurately measured, and the invention is particularly suitable for measuring the water content under the condition of high gas content.
Description
Technical Field
The invention relates to the field of petroleum engineering, in particular to a crude oil measuring device.
Background
Most of the existing three-phase flow microwave water content measuring methods are based on microwave transmission methods, the principle of the method is that the water content of a flowing medium is calculated by measuring the attenuation of microwaves in the flowing medium, the essence of the method is that the water content of the flowing medium is reflected by the dielectric constants of different media, and for oil field produced product oil-gas-water three-phase flow, the method usually contains a lot of oil impurities, the water content of the impurities is formation water, the mineralization degree is very large, and the mineralization degree is greatly influenced by the conductivity of the medium, so the measurement accuracy of the microwave water content measuring method based on the dielectric constants can be greatly influenced.
Researchers have proposed a measuring method for measuring water content based on the propagation velocity of microwaves in a fluid medium, which is not influenced by the mineralization degree of the fluid medium, and the propagation velocities of microwaves in oil, gas and water three-phase fluids also have a sufficiently large discrimination (the propagation velocity of microwaves in oil is 20.7km/s, the propagation velocity in water is 30km/s, and the propagation velocity in air is 3.3km/s) to ensure the measurement resolution.
The three-phase flow is rectified to obtain a standard flow pattern with a uniform flow form, the standard flow pattern avoids severe interference on microwave measurement caused by random fluctuation of an original flow pattern oil-gas-water three-phase interface, great convenience is provided for calibrating the propagation speed of microwaves in a mixture, and the measurement accuracy can be increased.
The problem that arises is how to rectify the three-phase flow to obtain a flow pattern suitable for measuring the water content by the microwave sonic velocity method.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a cyclone for multiphase flow measurement, which can effectively separate two phases of gas and liquid in a three-phase flow and has a standardized flow pattern.
The technical scheme is as follows:
a swirler for multiphase flow determination is characterized in that: the cyclone support device comprises an outer support cylinder, wherein three cyclone blades are arranged inside the outer support cylinder, the included angle between each cyclone blade and the central line of the outer support cylinder is theta, theta is more than 0 and less than 90 degrees, and the three cyclone blades are circumferentially and uniformly distributed;
the cyclone blade is an 1/2 elliptical plate, the major axis of the ellipse corresponding to the cyclone blade is a, the minor axis of the ellipse corresponding to the cyclone blade is b, the cyclone blade comprises a straight line edge and an arc-shaped connecting edge, the straight line edge coincides with the major axis direction of the corresponding ellipse, and the arc-shaped connecting edge is attached and fixed to the inner wall of the outer support cylinder.
The invention also provides a multiphase flow determination system, which comprises an installation body, wherein a measurement hole penetrates through the installation body in a straight line, the upstream section of the measurement hole is provided with the cyclone for multiphase flow determination, the downstream section of the measurement hole is provided with a microwave detection antenna, the microwave detection antenna comprises an adherence measurement antenna and a central measurement antenna, the adherence measurement antenna is close to the inner wall of the measurement hole and is arranged along the axial direction of the measurement hole, and the central measurement antenna is positioned on the central line of the measurement hole and is arranged along the axial direction of the measurement hole.
Drawings
FIG. 1 is a schematic structural view of example 1;
FIG. 2 is a schematic view of the inlet end of the outer support cylinder 11;
fig. 3 is a schematic view of an installation structure of the first swirl vanes 121 and the outer support cylinder 11;
FIG. 4 is a cross-sectional view taken along line D-D' of FIG. 1;
FIG. 5 is a schematic structural view of the first swirl vane 121;
FIG. 6 is a schematic diagram of the structure of experimental group I;
FIG. 7 shows the results of CFD simulation of the experimental group (i);
FIG. 8 is a schematic structural diagram of experiment group II;
FIG. 9 shows the results of CFD simulation in experiment group II;
FIG. 10 is a schematic diagram of the structure of experiment group c;
FIG. 11 shows the result of CFD simulation of experiment group C;
FIG. 12 is a graph of pressure loss versus inlet flow rate measured in experimental groups I, II, and III;
FIG. 13 is a schematic structural view of embodiment 3;
FIG. 14 is a schematic view of the inlet end configuration of a multiphase flow assay system;
FIG. 15 is a cross-sectional view B-B' of FIG. 14;
FIG. 16 is a cross-sectional view C-C' of FIG. 14;
FIG. 17 is an enlarged view of section i of FIG. 16;
FIG. 18 is a schematic structural view of example 4.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
Example 1:
as shown in fig. 1, 2, 3, 4, and 5, a cyclone for multiphase flow determination includes an outer support cylinder 11, three cyclone blades 12 are disposed inside the outer support cylinder 11, a wear-resistant coating is disposed on the surfaces of the cyclone blades 12, an included angle between the cyclone blades 12 and a center line of the outer support cylinder 11 is θ, θ is greater than 0 and less than 90 °, and the three cyclone blades 12 are circumferentially and uniformly distributed;
the swirl vanes 12 are 1/2 elliptical plates, the major axis of the ellipse corresponding to the swirl vanes is a, the minor axis of the ellipse is b, the swirl vanes 12 comprise a straight line edge 12a and an arc-shaped connecting edge 12b, the straight line edge 12a coincides with the major axis of the ellipse corresponding to the swirl vanes, and the arc-shaped connecting edge 12b is attached to and fixed on the inner wall of the outer support cylinder 11.
The minor axis direction of the corresponding ellipse of the swirl vane 12 is perpendicular to the center line of the outer support cylinder 11, the straight edges 12a of the three swirl vanes 12 are contacted with each other at the same abutting point, and the abutting point is located on the center line of the outer support cylinder 11.
The inner diameter of the outer support tube 11 is R, b ═ R, and R ═ 21.5 mm.
In order to further improve the rectification effect on the three-phase flow, theta is more than or equal to 30 degrees and less than or equal to 45 degrees.
In fig. 1 and 2, the three swirl blades 12 are a first swirl blade 121, a second swirl blade 122, and a third swirl blade 123 in this order.
Example 2:
three cyclone experimental groups are provided:
experimental group (i): this experimental group differs from example 1 in that θ is 45 °, as shown in fig. 6;
experiment group two: the experimental group is different from the example 1 in that the number of the swirl vanes 12 is four, and θ is 45 °, as shown in fig. 8;
experiment group c: the experimental group differs from example 1 in that the number of the swirl vanes 12 is two, and θ is 45 °, as shown in fig. 10.
Respectively carrying out CFD simulation on three cyclones of the experimental groups I, II and III, and carrying out comparative analysis on the results: the swirling effect of the three vanes is shown in fig. 7, 9 and 11 respectively.
For the description of fig. 7, 9, 11: in the original drawings corresponding to fig. 7, 9, and 11 (gray scale drawings), the pipes at the upstream side of the cyclone are all colored in green in a large area, and after passing through the cyclone, the part close to the inner wall of the pipe is colored in blue (representing an oil phase), and is colored in green, yellow, and red (representing a gas phase) in the direction of the pipe axis.
As can be seen from fig. 7, 9 and 11, the rectification effects of the experimental groups i and ii are superior to those of the experimental group iii, and the three-phase flow of the first two groups has uniform interfaces of gas phase and liquid phase after passing through the cyclone;
the pressure loss before and after the three-phase flow passes through the experimental groups (i), (ii), and (iii) was measured, as shown in fig. 12. As can be seen from fig. 12, the cyclone in the experimental group i has a large influence on the pressure loss, and the cyclones in the experimental groups i and iii have a relatively small influence on the pressure loss.
The cyclone with three blades in the experimental group I is selected to be better by comprehensively considering two factors of cyclone effect and pressure loss.
Example 3:
as shown in fig. 13, 14, 15, 16 and 17, a multiphase flow measurement system includes a mounting body 1, a measurement hole 1a is linearly penetrated in the mounting body 1, an upstream section of the measurement hole 1a is provided with the cyclone for multiphase flow measurement described in embodiment 1, and a downstream section of the measurement hole 1a is provided with a microwave detection antenna; the measuring hole 1a comprises a large hole section located at the upstream and a small hole section located at the downstream, the outer supporting cylinder 11 is embedded in the large hole section, an adjusting ring 13 is further arranged between the outer supporting cylinder 11 and the small hole section, one end of the adjusting ring 13 is tightly abutted to the end face of the outer supporting cylinder 11, the other end of the adjusting ring 13 is tightly abutted to the hole bottom of the large hole section, the inner diameter of the outer supporting cylinder 11 is equal to the aperture of the measuring hole 1a, the inner diameter of the adjusting ring 13 is equal to the aperture of the measuring hole 1a, the adjusting ring 13 plays a role in adjusting the position of the swirler, and on one hand, installation and adjustment of different angles are facilitated.
The microwave detection antenna comprises eight adherent measurement antennas 21 and a central measurement antenna 22, wherein the adherent measurement antennas 21 are close to the inner wall of the measurement hole 1a and are arranged along the axial direction of the measurement hole 1a, the eight adherent measurement antennas 21 are uniformly arranged circumferentially, and the central measurement antenna 22 is positioned on the central line of the measurement hole 1a and is arranged along the axial direction of the measurement hole 1 a.
It can be known that the adherence measuring antenna 21 and the central measuring antenna 22 are led out of the measuring hole 1a through lead wires, lead holes are arranged on the mounting body 1, the lead wires pass through the lead holes, and the lead wires are sealed with the inner walls of the lead holes.
The outer wall of an outer support section of thick bamboo 11 is equipped with at least one screens lug 11a, and this screens lug 11a is located support section of thick bamboo 11's upstream port department be equipped with the screens on the pore wall of measuring orifice 1a upstream port department sunken, this screens is sunken to be extended outward measuring orifice 1a, this screens sunken with screens lug 11a phase-match, screens lug 11a is sunken to be corresponding in the screens is sunken.
The swirl vanes 12 are inclined counterclockwise from the inlet to the outlet of the measuring hole 1a as viewed from the inlet end of the measuring hole 1 a. Flanges are respectively arranged at two ends of the mounting body 1 corresponding to the measuring hole 1a, and are connected to a pipeline for conveying oil-gas-water three-phase flow, so that rectification and measurement can be performed.
When three-phase flow enters the outer supporting cylinder 11, three swirl vanes 12 rectify the three-phase flow into rotational flow and separate the three-phase flow in the pipe according to different densities, wherein the density of gas is minimum, so the three-phase flow can be converged to the center of the pipe to form gas core flow, the densities of oil and water are relatively close, a liquid film formed jointly is attached to the inner side of the pipe wall to flow, the gas-liquid two-phase separation limit is obvious, and the three-phase flow gas-liquid separator is particularly suitable for measuring the water content under the condition of high gas content.
Example 4:
as shown in fig. 18, a multiphase flow comprehensive measurement system includes a venturi flow meter 3 and the multiphase flow measurement system of embodiment 2, and a liquid outlet end of the venturi flow meter 3 is connected with a liquid inlet end of the multiphase flow measurement system through a flange.
The total volume flow V of the oil-gas-water three-phase mixed fluid is measured by the Venturi flowmeter 3mix(ii) a The adherent measurement antenna 21 arranged on the adherent wall is contacted with the adherent flowing oil-water mixed fluid, and the volume water ratio WVF of the oil-water mixture can be measuredol(ii) a And the central measuring antenna 22 extending into the measuring hole 1a measures the volume gas content GVF of the oil, gas and water three phasesmix(ii) a The adherence measuring antenna 21 and the central measuring antenna 22 are both microwave sensors.
Then according to the propagation speed/U of the microwave in the oil-water mixed fluid determined in the calibration experimentolRelation to water content (i.e. WVF ═ f (U)ol) velocity/U of propagation of microwaves in oil, gas and water three-phase fluid mixturesmixRelationship with gas content (i.e. GVF ═ f (U)mix) To calculate the gas fraction of the mixed fluid.
According to the measured total volume flow V of the oil-gas-water three-phase mixturemixCombined with respective densities ρ of the three-phase fluidso、ρg、ρlThe respective mass flow and volume flow can be calculated simultaneously by the following equations:
Vg＝GVF·Vmix
Gg＝Vgρg
Vl＝WVF·Vmix
GL＝Vlρl
Vo＝Vmix-GVF·Vmix-WVF·Vmix
Go＝Voρo
in the formula:
Vo、Vg、Vlthe volume flow of oil, gas and water phases respectively;
ρo、ρg、ρlthree phases of oil, gas and water respectivelyDegree;
Go、Gg、Glthe mass flow rates of oil, gas and water phases are respectively;
compared with the prior art, the invention has the beneficial effects that: the three-phase flow is separated into a gas phase and a liquid phase with obvious boundaries through the rectification action of the cyclone, wherein the gas phase is converged to the center of the pipeline to form a gas core flow, and the liquid phase (oil phase and water phase) forms a liquid film to flow along the inner side of the pipe wall, so that the parameters such as gas content, water content and the like can be accurately measured, and the device is particularly suitable for measuring the water content under the condition of high gas content.
Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.
Claims (8)
1. A cyclone for multiphase flow measurement is characterized in that: the device comprises an outer supporting cylinder (11), wherein three rotational flow blades (12) are arranged inside the outer supporting cylinder (11), the included angle between each rotational flow blade (12) and the central line of the outer supporting cylinder (11) is theta, theta is larger than 0 and smaller than 90 degrees, and the three rotational flow blades (12) are annularly and uniformly distributed;
the cyclone blade (12) is an 1/2 elliptical plate, the major axis of the ellipse corresponding to the cyclone blade is a, the minor axis of the ellipse is b, the cyclone blade (12) comprises a straight line edge (12a) and an arc-shaped connecting edge (12b), the straight line edge (12a) coincides with the major axis direction of the corresponding ellipse, and the arc-shaped connecting edge (12b) is attached and fixed on the inner wall of the outer support cylinder (11).
2. The cyclone for multiphase flow measurement according to claim 1, wherein: the inner diameter of the outer supporting cylinder (11) is R, and b is R.
3. The cyclone for multiphase flow measurement according to claim 2, wherein: the minor axis direction of the corresponding ellipse of the swirl vanes (12) is vertical to the central line of the outer support cylinder (11), the straight edges (12a) of the three swirl vanes (12) are mutually contacted at the same abutting point, and the abutting point is positioned on the central line of the outer support cylinder (11).
4. A cyclone for multiphase flow measurement according to claim 1, 2 or 3, wherein: theta is more than or equal to 30 degrees and less than or equal to 45 degrees.
5. A cyclone for multiphase flow measurement according to claim 1, 2 or 3, wherein: the surface of the rotational flow blade (12) is provided with a wear-resistant coating.
6. A multiphase flow assay system, characterized by: the cyclone for multiphase flow determination comprises a mounting body (1), wherein a measuring hole (1a) penetrates through the mounting body (1) in a straight line, the upstream section of the measuring hole (1a) is provided with the cyclone for multiphase flow determination as claimed in claim 4, the downstream section of the measuring hole (1a) is provided with a microwave detection antenna, the microwave detection antenna comprises an adherence measurement antenna (21) and a central measurement antenna (22), the adherence measurement antenna (21) abuts against the inner wall of the measuring hole (1a) and is arranged along the axial direction of the measuring hole (1a), and the central measurement antenna (22) is positioned on the central line of the measuring hole (1a) and is arranged along the axial direction of the measuring hole (1 a).
7. A multiphase flow assay system as recited in claim 6, wherein: the measuring hole (1a) comprises a large hole section positioned at the upstream and a small hole section positioned at the downstream, the outer supporting cylinder (11) is embedded in the large hole section, an adjusting ring (13) is further arranged between the outer supporting cylinder (11) and the small hole section, one end of the adjusting ring (13) is tightly abutted to the end face of the outer supporting cylinder (11), and the other end of the adjusting ring (13) is tightly abutted to the hole bottom of the large hole section;
the inner diameter of the outer supporting cylinder (11) is equal to the aperture of the measuring hole (1a), and the inner diameter of the adjusting ring (13) is equal to the aperture of the measuring hole (1 a).
8. A multiphase flow assay system as claimed in claim 6 or claim 7 wherein: the outer wall of an outer support section of thick bamboo (11) is equipped with at least one screens lug (11a), and this screens lug (11a) is located support the upstream port department of a section of thick bamboo (11) it is sunken to be equipped with the screens on the pore wall of measuring aperture (1a) upstream port department, and this screens is sunken to extend outward measuring aperture (1a), this screens sunken with screens lug (11a) phase-match, screens lug (11a) are sunken correspond in the screens is sunken.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| NO346797B1 (en) * | 2021-09-21 | 2023-01-16 | Wionetic AS | In-line flowmeter sensor device, in-line flowmeter and method for real-time monitoring of a volumetric ratio of fluid |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20210309 |