CN106092225B - Measurement method and its sensor for three phase circulation parameter of oil-gas-water - Google Patents
Measurement method and its sensor for three phase circulation parameter of oil-gas-water Download PDFInfo
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- CN106092225B CN106092225B CN201610362533.3A CN201610362533A CN106092225B CN 106092225 B CN106092225 B CN 106092225B CN 201610362533 A CN201610362533 A CN 201610362533A CN 106092225 B CN106092225 B CN 106092225B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
Abstract
The present invention provides a kind of measurement method and its sensor for three phase circulation parameter of oil-gas-water, and the sensor includes measurement pipe and electrode group；The electrode group is at least two groups, and is sticked in opposite positional relationship in the outer wall of the measurement pipe, and every group of electrode includes electrode and an external electrode in one, and the external electrode is located on the interior surrounding them, and the inside and outside electrode forms " returning " font structure.Compared to the prior art, provided by the present invention for the measurement method and its sensor of three phase circulation parameter of oil-gas-water, pass through optimization design capacitance chromatography imaging (ECT) sensors electrode structure, control the sensitivity field section of measurement, it can be achieved just to calculate the moisture content and vapor/liquid ratio of oil gas water three phase flow merely with capacitance.Specifically, the measurement to oil-gas-water three-phase annular flow key parameter may be implemented in conjunction with single " time " word electrode mode measurement and comparative electrode group measurement pattern in " returning " word electrode structural designs of inventive sensor.
Description
Technical field
The present invention relates to the technical fields of the measuring device of oil gas water three phase flow amount parameter and method in oil and gas industry, special
It is not to be related to a kind of measurement method and its sensor for three phase circulation parameter of oil-gas-water.
Background technique
Oil-gas-water multiphase flow is flow media common in oil and gas industry, mainly include liquid hydrocarbon, natural gas and
Mineralized water.The online metering accurate in real time of oil gas water three phase flow amount is always the important link in oil and gas industry, to oil gas
The exploration of hiding and reserves monitoring all have significance.In China's offshore oil and gas industry, traditional gas gathering station is used for a long time to solidifying
Analysis natural gas is separated, then is measured using single-phase flow instrument to the medium after separation.Though this way can guarantee one
Devise a stratagem accuracy of measurement, but its drawback is also fairly obvious.The construction at separate measurement station not only somewhat expensive a, it is often more important that exploitation
Block is generally only capable of building a separate measurement station, and numerous natural gas well yields in the block can only be counted periodically in turn
Amount, and then it is unable to satisfy the demand that oil company carries out real-time monitoring to every mouth well yield information.Therefore, research both at home and abroad
Person wishes to research and develop a kind of industrial technology that can accurately measure oil gas water three phase flow amount under the conditions of non-separation always.
Capacitance chromatography imaging (Electrical Capacitance Tomography, ECT) is the weight of multiphase flow measurement
Want method.It relies on a series of measurement capacitance of array electrode acquisition for being arranged in tested field domain boundary, and is surveyed using capacitor
Relationship in magnitude and tested field domain between dielectric distribution carries out the reconstruction of image, obtains the distribution map of medium in tested field domain
Picture.And sensing system is the hardware core part of ECT.Currently, most sensor designs is only applicable to the survey of two phase flow
Amount, or the single key parameter of oil gas water three phase flow can only be measured, such as solution-air ratio.And for generally existing in engineering
The sensor design scheme that oil-gas-water three-phase annular flow is not applicable in.
Summary of the invention
The present invention provides a kind of measurement methods and its sensor for three phase circulation parameter of oil-gas-water, are able to solve
Each phase parameter in three phase circulation of oil-gas-water that can measure simultaneously that is simple without a kind of structure in the prior art, being applicable in senses
The technical issues of device and measurement method.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: it provides a kind of for oil-gas-water three
The capacitance imaging sensor of phase circulation parameter measurement, the sensor include measurement pipe and electrode group；The electrode group is at least
Two groups, and be sticked in opposite positional relationship in the outer wall of the measurement pipe, every group of electrode includes electrode and a dispatch from foreign news agency in one
Pole, the external electrode are located on the interior surrounding them, and the inside and outside electrode forms " returning " font structure.
According to one preferred embodiment of the present invention, the sensor includes 8 electrode groups, and 8 electrode groups are in uniform battle array
Outer wall ring week of the column distribution in the measurement pipe.
According to one preferred embodiment of the present invention, the material of the measurement pipe has insulated enclosure characteristic.
According to one preferred embodiment of the present invention, the material of the measurement pipe is polyether-ether-ketone.
According to one preferred embodiment of the present invention, the electrode group is all made of copper foil or other good conductive metallic material production.
According to one preferred embodiment of the present invention, the sensor further includes support housing, and the support housing branch stays at
The outside of the measurement pipe and the electrode group shields stray capacitance noise for protecting the electrode group, and by sensor
It is fixedly installed in pipeline to be measured.
According to one preferred embodiment of the present invention, the cross section of the measurement pipe is circle.
According to one preferred embodiment of the present invention, the external electrode is along the axially extending length of measurement pipe and measurement pipe interior diameter
Ratio be 1: 1；The spacing distance of the interior electrode and the external electrode is 2mm.
In order to solve the above technical problems, another technical solution used in the present invention is: providing a kind of utilization above-mentioned implementation
The method of the described in any item three phase circulation parameters of sensor measurement oil-gas-water of example, which comprises
Oil-water in three-phase ring-type flow liquid, which is obtained, using single electrode group measurement pattern compares parameter；
The vapor/liquid ratio parameter in three-phase ring-type flow liquid is obtained using the electrode group measurement pattern of at least a pair of opposing；
Each phase content in three-phase ring-type flow liquid is calculated than parameter and vapor/liquid ratio parameter according to the oil-water.
According to one preferred embodiment of the present invention, described to be obtained in three-phase ring-type flow liquid using single electrode group measurement pattern
In the step of oil-water is than parameter, using interior electrode as excitation electrode, external electrode is as measuring electrode；It is described to utilize at least one
In the step of obtaining the vapor/liquid ratio parameter in three-phase ring-type flow liquid to the electrode group measurement pattern being oppositely arranged, using interior electrode
As excitation electrode, the interior electrode for another electrode group being arranged corresponding thereto is as measuring electrode, the external electrode point of two electrode groups
It is not grounded.
The beneficial effects of the present invention are: being in contrast to the prior art, provided by the present invention for oil-gas-water three-phase
The measurement method and its sensor of circulation parameter control the sensitive place of measurement by optimization design ECT sensor electrode structure
Between (sensing penetration depth), it can be achieved that merely with capacitance, just calculate the aqueous of oil gas water three phase flow
Rate and vapor/liquid ratio, specifically, " returning " word electrode structural designs of inventive sensor, in conjunction with single " time " word electrode mode measurement
With comparative electrode measurement pattern, the measurement to oil-gas-water three-phase annular flow key parameter may be implemented.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is one preferred embodiment of capacitance imaging sensor that the present invention is used for three phase circulation parameter measurement of oil-gas-water
Structural schematic diagram；
Fig. 2 is the structure sectional view that sensor has support housing in Fig. 1 embodiment；
Fig. 3 is the flow diagram of three phase circulation measurement method of parameters of oil-gas-water, one preferred embodiment of the present invention；And
Fig. 4 is the specific steps flow chart of measurement method in Fig. 3 embodiment.
Specific embodiment
With reference to the accompanying drawings and examples, the present invention is described in further detail.It is emphasized that following implement
Example is merely to illustrate the present invention, but is not defined to the scope of the present invention.Likewise, following embodiment is only portion of the invention
Point embodiment and not all embodiments, institute obtained by those of ordinary skill in the art without making creative efforts
There are other embodiments, shall fall within the protection scope of the present invention.
Referring to Fig. 1, Fig. 1 is that capacitance imaging sensor one of the present invention for three phase circulation parameter measurement of oil-gas-water is excellent
Select the structural schematic diagram of embodiment.The sensor includes but is not limited to following structure composition: measurement pipe 100 and electrode group 200.
Specifically, electrode group 200 is at least two groups, and it is sticked in opposite positional relationship in the outer wall of measurement pipe 100,
Every group of electrode include in one electrode 210 and an external electrode 220, external electrode 220 be located on around interior electrode 210, inside and outside electrode
Form " returning " font structure.Preferably, interior electrode 210 is in rectangular configuration, the structure annular in shape of external electrode 220.Electrode group 200 passes through
Signal transmission cable is connected with external ECT signal acquisition equipment.
Preferably, which includes 8 electrode groups 200, and 8 electrode groups are distributed in measurement pipe 100 in uniform array
Outer wall ring week.Electrode group 200 is preferably all made of copper foil material production, can also be titanium alloy foil or aluminium foil etc..
Adjust the interior electrode 210 of electrode group 200, external electrode 220 is placed with position and patch width, can control sensor
Detection perceived depth, realize the oil only measured in annular flow liquid phase under single " time " word electrode group measurement pattern, water when containing rate, no
It is influenced by internal gas phase content.It is further preferred that length and measurement pipe that the external electrode 220 is axially extending along measurement pipe 100
The ratio of interior diameter is 1: 1；And the spacing distance of interior electrode 210 and external electrode 220 is 2mm.The specific size of measurement pipe 100 can be with
The variation of pipeline caliber to be measured and design, herein without limitation to the caliber occurrence of measurement pipe 100.
100 cross-sectional shape of measurement pipe can be rectangle, circle and irregular shape etc., it is preferred that for circle.
The material of measurement pipe 100 has the exhausted water characteristic that insulate, and preferred material is polyether-ether-ketone (English name
Polyetheretherketone, abbreviation PEEK).Certain measurement pipe 100 can also be other exhausted water insulating materials, in ability
Within the scope of the understanding of field technique personnel, it can voluntarily choose, will not enumerate herein.The wall thickness of measurement pipe 100 can basis
Internal heterogeneous fluid calculation of pressure determines, is also not specifically limited herein.
Referring to Fig. 2, Fig. 2 is the structure sectional view that sensor has support housing in Fig. 1 embodiment, which is also wrapped
Support housing 300 is included, support housing 300 stay at the outside of measurement pipe 100 and electrode group 200, are used for guard electrode group
200, stray capacitance noise is shielded, and sensor is fixedly installed in pipeline to be measured.310 is for the logical of installation in figure
Hole.
There are two types of measurement patterns for sensor tool in the embodiment: single electrode group measurement pattern and comparative electrode group measure mould
Formula, two kinds of measurement patterns can obtain oil-water in three-phase ring-type flow liquid than parameter and vapor/liquid ratio parameter respectively.In single electrode
In group measurement pattern, using interior electrode 210 as excitation electrode, external electrode 220 is used as measuring electrode；And comparative electrode group measures
In mode, using interior electrode 210 as excitation electrode, the interior electrode 210 for another electrode group being arranged corresponding thereto is as measurement
The external electrode 220 of electrode, two electrode groups is grounded respectively, for increasing the linearity and sensitive field uniformity that interior electrode 210 measures.
And specific measurement method please refers to the specific descriptions of subsequent embodiment.
Compared to the prior art the case where, provided by the present invention for three phase circulation parameter measurement of oil-gas-water capacitor at
As sensor controls the sensitivity field section (sensing of measurement by optimization design ECT sensor electrode structure
Penetration depth), it can be achieved that merely with capacitance, just calculate the moisture content and solution-air of oil gas water three phase flow
Than, specifically, " returning " word electrode structural designs of inventive sensor, in conjunction with single " time " word electrode mode measurement and comparative electrode
The measurement to oil-gas-water three-phase annular flow key parameter may be implemented in measurement pattern.
Further, the embodiment of the present invention also provides a kind of measurement method implementation for three phase circulation parameter of oil-gas-water
Example, referring to Fig. 3, Fig. 3 is the flow diagram of three phase circulation measurement method of parameters of oil-gas-water, one preferred embodiment of the present invention.
This method includes but is not limited to following steps.
Step S310 obtains oil-water in three-phase ring-type flow liquid using single electrode group measurement pattern and compares parameter.
In step s310, using interior electrode as excitation electrode, external electrode is as measuring electrode.Using above-described embodiment
In 8 electrode group structures, can have 8 measured values, obtain oil-gas-water three-phase annular flow moisture content key parameter.
Step S320 obtains the gas-in three-phase ring-type flow liquid using the electrode group measurement pattern of at least a pair of opposing
Liquor ratio parameter.
In step s 320, it is preferred to use 4 pairs of electrode groups measure (i.e. 8 phase inner electrodes).Totally 4 capacitances,
Calculate the vapor/liquid ratio key parameter for obtaining three phase circulation of oil-gas-water.Using interior electrode as excitation electrode, it is arranged corresponding thereto
Another electrode group interior electrode as measuring electrode, the external electrode of two electrode groups is grounded respectively, with improve in electrode measurement
Linear and sensitive field uniformity.In the step, amount to 16 electrodes using 8 groups of " returning " word electrodes, 120 surveys of acquisition can be measured
Magnitude, then oil-water two phase flow qualitative picture reconstructed results are obtained through Linear back-projection (LBP) algorithm.
Step S330 is calculated in three-phase ring-type flow liquid than parameter and vapor/liquid ratio parameter according to oil-water and respectively mutually contains
Rate.
Referring to Figure 4 together, Fig. 4 is the specific steps flow chart of measurement method in Fig. 3 embodiment.Survey in the embodiment
Amount method can obtain oil-gas-water three-phase annular flow key parameter by measuring twice.Measurement is using single " time " for the first time
Word electrode mode measurement is measured by interior electrode excitation, external electrode, and interior electrode harvests measurement capacitance, then obtains through LBP algorithm
Oil-water two phase flow qualitative picture reconstructed results obtain the oil in measurement annular flow liquid phase, water contains rate；Second of measurement uses
Comparative electrode measurement pattern utilizes electrode excitation, the interior electrode measurement of opposite group, dispatch from foreign news agency in one group in 8 groups of " returning " word structure electrodes
Pole earthing mode, in conjunction with first time measurement result, obtain oil gas water three phase flow it is dynamic in each phase contain rate.
Compared to the prior art, this method utilize unique structure sensor structure, can easily measure it is fuel-displaced-
The parameter containing rate of each phase in air-water three-phase ring-type flow liquid.With very high practical value.
Mode the above is only the implementation of the present invention is not intended to limit the scope of the invention, all to utilize this
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content, it is relevant to be applied directly or indirectly in other
Technical field is included within the scope of the present invention.
Claims (9)
1. a kind of capacitance imaging sensor for three phase circulation parameter measurement of oil-gas-water, which is characterized in that the sensor
Including measurement pipe and electrode group；The electrode group is at least two groups, and is sticked in opposite positional relationship in the measurement pipe
Outer wall, every group of electrode include electrode and an external electrode in one, and the external electrode is located on the interior surrounding them, it is described in,
External electrode forms " returning " font structure；
When measuring oil-water in three-phase ring-type flow liquid than parameter, using interior electrode as excitation electrode, external electrode is as measurement
Electrode；
When measuring the vapor/liquid ratio parameter in three-phase ring-type flow liquid, measured using the electrode group of at least a pair of opposing,
Wherein, the interior electrode of an electrode group is as excitation electrode, and the interior electrode for another electrode group being arranged corresponding thereto is as measurement electricity
The external electrode of pole, two electrode groups is grounded respectively.
2. sensor according to claim 1, which is characterized in that the sensor includes 8 electrode groups, 8 electricity
Pole group is distributed in the outer wall ring week of the measurement pipe in uniform array.
3. sensor according to claim 1, which is characterized in that the material of the measurement pipe has insulated enclosure characteristic.
4. sensor according to claim 3, which is characterized in that the material of the measurement pipe is polyether-ether-ketone.
5. sensor according to claim 1, which is characterized in that the electrode group is all made of copper foil production.
6. sensor according to claim 1, which is characterized in that the sensor further includes support housing, the support
Shell branch stays at the outside of the measurement pipe and the electrode group, for protecting the electrode group, shields stray capacitance noise,
And sensor is fixedly installed in pipeline to be measured.
7. sensor according to claim 1, which is characterized in that the cross section of the measurement pipe is circle.
8. sensor according to claim 1, which is characterized in that the external electrode along the axially extending length of measurement pipe with
The ratio of measurement pipe interior diameter is 1: 1；The spacing distance of the interior electrode and the external electrode is 2mm.
9. a kind of method using the described in any item three phase circulation parameters of sensor measurement oil-gas-water of claim 1-8,
It is characterized in that, which comprises
Oil-water in three-phase ring-type flow liquid, which is obtained, using single electrode group measurement pattern compares parameter；
The vapor/liquid ratio parameter in three-phase ring-type flow liquid is obtained using the electrode group measurement pattern of at least a pair of opposing；
Each phase content in three-phase ring-type flow liquid is calculated than parameter and vapor/liquid ratio parameter according to the oil-water；
Wherein, described to be obtained in the step of oil-water in three-phase ring-type flow liquid is than parameter using single electrode group measurement pattern, it uses
Interior electrode is as excitation electrode, and external electrode is as measuring electrode；The electrode group using at least a pair of opposing measures mould
Formula obtained in the step of vapor/liquid ratio parameter in three-phase ring-type flow liquid, using interior electrode as excitation electrode, was arranged corresponding thereto
Another electrode group interior electrode as measuring electrode, the external electrode of two electrode groups is grounded respectively.
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| CN108152341B (en) * | 2017-12-05 | 2020-09-25 | 浙江大学 | Low-temperature fluid in-pipe flowing capacitance tomography device |
| CN108508066B (en) * | 2018-04-03 | 2020-08-07 | 烟台北方星空自控科技有限公司 | Capacitance probe |
| CN108828028B (en) * | 2018-08-02 | 2024-01-23 | 深圳市联恒星科技有限公司 | Capacitive sensor for measuring phase content of two-phase flow and structural parameter optimization method thereof |
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| CN1174244C (en) * | 2001-07-06 | 2004-11-03 | 中国科学院工程热物理研究所 | Square capacitance chromatographic imaging sensor |
| US7496450B2 (en) * | 2003-08-22 | 2009-02-24 | Instituto Mexicano Del Petroleo | Method for imaging multiphase flow using electrical capacitance tomography |
| NO324812B1 (en) * | 2006-05-05 | 2007-12-10 | Multi Phase Meters As | Method and apparatus for tomographic multiphase flow measurements |
| CN101865872A (en) * | 2010-04-27 | 2010-10-20 | 清华大学 | Spiral capacitance sensor for measuring gas-liquid two-phase flow porosity of tiny pipeline |
| CN102495107B (en) * | 2011-10-19 | 2013-09-25 | 天津大学 | Internal and external composite array sensor for detecting process parameter of fluid in pipeline |
| CN103439374B (en) * | 2013-08-23 | 2015-10-21 | 华北电力大学 | A kind of combined printed circuit board capacitance tomography sensor |
| CN104655692B (en) * | 2013-11-19 | 2017-03-01 | 中国科学院工程热物理研究所 | Capacitance tomography sensor |
| CN105466465B (en) * | 2015-11-20 | 2018-08-28 | 华北电力大学 | A kind of capacitance tomography sensor of helical structure electrode |
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