CN206114018U - Measure in heterogeneous stream gas -liquid two -phase critical flow nozzle flowmeter of flow separately - Google Patents
Measure in heterogeneous stream gas -liquid two -phase critical flow nozzle flowmeter of flow separately Download PDFInfo
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- CN206114018U CN206114018U CN201621108266.9U CN201621108266U CN206114018U CN 206114018 U CN206114018 U CN 206114018U CN 201621108266 U CN201621108266 U CN 201621108266U CN 206114018 U CN206114018 U CN 206114018U
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Abstract
The utility model relates to a measure in heterogeneous stream gas -liquid two -phase critical flow nozzle flowmeter of flow separately, it includes following component: throttle type nozzle (1), it has entry, export and throat, and wherein the fluidic flow area of department of throat is minimum, the gamma ray detector, it includes gamma ray transmitter (2) and gamma ray receiver (3), the gamma ray that its arrangement form makeed the gamma ray transmitter send passes along the diametric(al) the entrance cross -section of throttle type nozzle is reachd the gamma ray receiver, pressure sensor is used for respectively measuring the entrance pressure and the outlet pressure of throttle type nozzle, temperature sensor is used for measuring the entrance temperature of throttle type nozzle.
Description
Technical field
This utility model belongs to multiphase flow rate metering field.Specifically, this utility model is related to a kind of for measuring many
The critical flow nozzle effusion meter of the respective flow of gas-liquid two-phase in mutually flowing.
Background technology
In oil and gas industry, oil gas well effluent includes the gas-liquid mixture fluid of liquid phase crude oil/water and gas phase natural gas, industry simultaneously
It is interior to be referred to as multiphase flow.Wherein described gas phase includes such as oil gas field gas or any gas not coagulated at normal temperatures, specifically has
Such as methane, ethane, propane, butane；The liquid phase may include：Oil phase, such as crude oil itself and during oil extraction
The liquid additive being dissolved in crude oil, and water phase, such as stratum water, adopt during the water and molten that injects in Oil/gas Well
Other liquid additives in Xie Shui phases.In practice, oil phase mutually may be separated with water, it is also possible to oil phase and water phase
Mix, or complete emulsifying.How in the gas-liquid mixture fluid that from Oil/gas Well produce gas is real-time and accurately measured
The flow of body and the flow of liquid, and oil phase, gas phase and the respective flow of water phase three-phase how are further measured, it is oil
Gas reservoir is managed and basic data necessary to Optimizing manufacture.When the gas phase mass content in multiphase flow is higher than 80%, commonly referred to as
For dampness.In hydrocarbon sub-marine field and shale gas exploitation, production is dampness.
When Oil/gas Well is high-pressure well, well head pressure is ten MPas of magnitudes, in order to control gas well yield and well head pressure, oil
Mouth is widely used in petroleum industry as a kind of throttling arrangement.In reality, oil nozzle is not only as control oil well output
Device, client to oil nozzle also have measure requirement.
A kind of method for being used to measuring the respective flow of gas-liquid two-phase in multiphase flow in prior art is Venturi meter+gal
Horse ray method, its principle is the total volumetric flow rate for utilizing Venturi measuring dampness, and is measured with single energy gamma-ray detector
The respective phase fraction of gas-liquid two-phase, is then multiplied by the respective phase fraction of gas-liquid two-phase with total volumetric flow rate, obtains gas-liquid two-phase each
From volume flow.However, oil nozzle throat is velocity of sound flowing, the principle of venturi differential pressure method is not suitable for the meter of velocity of sound flowing
Amount.
In existing oil field, nozzle is there is in well tube port position, underground crude oil sprays through the nozzle.People pass through
Long-term production practices, it has been recognized that pressure P at the oil flow and nozzle entrance at these nozzles1(it is referred to as " oil on oil field
Pressure ") and nozzle exit pressure P2Pressure differential deltap P between (being referred to as " back pressure " on oil field) has some quantitative relationships and Jing
Relational expression is tested, can be used to estimate original flow roughly, but this metering method error is very big；Reality when another kind of method is well testing
Survey, by examination amount pressure, temperature during well testing, then by separating to well product after measure gas phase and liquid phase, logarithm respectively
According to being fitted.This method is not suitable for life-time service, because the gas phase quality phase content in the pressure and crude oil of oil well is being given birth to
It is dynamic change in the life cycle, if very big error will be brought using unalterable metering formula, or even judges oil well by accident
Yield.
Additionally, it has been found that in oil pressure P1On the premise of being basically unchanged, when differential pressure Δ P gradually rises, total flow Q
Gradually increase；But when differential pressure Δ P meets and exceeds certain marginal value Δ PcAfterwards, flow Q no longer changes with differential pressure Δ P, but protects
Hold a certain stationary value not to be further added by, this state is referred to as into critical stream mode.
Therefore, people control gas well yield, control well head pressure using oil nozzle, at the same time it is wished that oil nozzle can be carried out to product
Metering.But, current oil nozzle function of measuring is extremely limited, can not the accurate respective matter of gas-liquid two-phase in real time measure multiphase flow
Amount flow.
Utility model content
First aspect of the present utility model provide it is a kind of measurement multiphase flow in gas-liquid two-phase each flow critical flow spray
Mouth effusion meter, it is included with lower member：
Throttle-type nozzle (1), it has entrance, outlet and throat, and the circulation area of fluid is minimum wherein at throat；
Gamma-ray detector, it includes gamma ray emission device (2) and gamma ray receptor (3), its arrangement
So that the gamma ray that gamma ray emission device sends is reached diametrically through the porch section of the throttle-type nozzle
The gamma ray receptor；
Pressure transducer, is respectively used to measure the pressure at inlet P of the throttle-type nozzle1With outlet pressure P2。
Temperature sensor, for measuring the inlet temperature T of the throttle-type nozzle1。
Preferably, the 1/10-1/2 that the throat section product of the throttle-type nozzle is accumulated for its entrance section.
Wherein, the gamma-ray detector is single energy gamma-ray detector.
Second aspect of the present utility model is related to a kind of measuring method of the respective flow of gas-liquid two-phase in measurement multiphase flow, its
Using the critical flow nozzle effusion meter described in this utility model first aspect, the method is comprised the following steps：
A) the pressure P of the porch of throttle-type nozzle is measured by pressure transducer1With the pressure P in exit2, by temperature
Temperature T of the porch of degree sensor measurement throttle-type nozzle1；
B) make the multiphase flow and the critical flow nozzle effusion meter is flow through with critical stream mode, wherein sentencing in the following manner
Disconnected multiphase flow has reached critical flow：If r is the ratio of pressure and pressure at inlet at oil nozzle outletBy measured value P1、
T1Determine density of gas phase ρg1；By single energy gamma survey hybrid density value ρm, it is known that gas phase quality phase contentRe-define Gas phase is when reaching critical flow according to multiphase flow flowing
The characteristics of velocity of sound flows, can define critical pressure ratioThe formula can by iterative
Obtain critical pressure ratio rc, when actual measurement pressure ratioWhen, then judge the flowing of multiphase flow as critical flow；During critical flow
By formulaCalculate the alternate velocity-slip of gas-liquid
Compare s；Very high generally, due to well head upstream pressure, more than 2Mpa, even as high as tens of MPa, and downstream production flow line pressure is general
Less than 1Mpa (usually 500kPa-1Mpa), therefore pressure ratioNumerical value very little, once thus install this practicality
New critical flow nozzle, opens valve, then the flow regime of multiphase flow is in critical stream mode.Even so, still have must
To be judged with above-mentioned decision method before formal measurement, to guarantee that the applicable precondition of flow rate calculation meets；Such as
Fruit empirical tests multiphase flow flow regime is not at critical stream mode, then it is not recommended that being gone to survey with equipment of the present utility model and formula
Amount, at this moment can use additive method instead and be measured.
D) the total mass flow rate Q of multiphase flow is calculated respectively by below equationm, gas phase mass flow Qm,gWith liquid phase matter
Amount flow Qm,l：
Total mass flow rate：
Gas phase mass flow：Qm,g=QmGMF
Liquid phase quality flow：Qm,l=Qm(1-GMF)
Wherein：
QmFor total mass flow rate, kg/s
ρg1For density of the gas phase under state at throttle-type nozzle entrance, kg/m3
ρlFor fluid density, kg/m3
GMF is gaseous mass phase content
A is cross-sectional area at the throat of throttle-type nozzle, m2
C is throttle-type nozzle efflux coefficient, is constant
K is the adiabatic exponent of gas
R is the ratio of pressure and pressure at inlet at oil nozzle outlet
S is the alternate velocity-slip ratio of gas-liquid,
Advantage of the present utility model is as follows：
1st, this utility model has creatively used single energy gamma-ray detector to measure multiphase with reference to critical flow nozzle
The respective mass flow of gas-liquid two-phase in stream, wherein single energy gamma-ray detector measures in real time gas-liquid mixed density.It is existing
Also there is critical flow nozzle effusion meter in technology, but be only used for estimating gas-liquid mixture total flow roughly, it is impossible to be smart in real time
Really measure the respective mass flow of gas-liquid two-phase in multiphase flow.
2nd, this utility model is directed to above-mentioned originality measuring equipment, specially employs originality formula and goes to calculate critical flow spray
The respective mass flow of gas-liquid two-phase under mouth state.
Description of the drawings
Fig. 1 is the schematic diagram of critical flow nozzle effusion meter of the present utility model.
In figure, reference implication is as follows：
1st, oil nozzle connectivity port；2nd, pressure, temperature complex sensor；3rd, gamma ray emission device；4th, pressure transducer；5、
Gamma ray receptor；6th, oil nozzle throat；7th, oil nozzle outlet.
Being for illustration only property of the figures above technology design of the present utility model and technical scheme are illustrated, and not with any side
Formula limits this utility model.
Specific embodiment
Description below uses the respective flow of gas-liquid two-phase in critical flow nozzle effusion meter of the present utility model measurement multiphase flow
Measuring method, the method comprises the following steps：
A) the pressure P of the porch of throttle-type nozzle is measured by pressure transducer1With the pressure P in exit2, by temperature
Temperature T of the porch of degree sensor measurement throttle-type nozzle1；
B) make the multiphase flow and the critical flow nozzle effusion meter is flow through with critical stream mode, wherein sentencing in the following manner
Disconnected multiphase flow has reached critical flow：If r is the ratio of pressure and pressure at inlet at oil nozzle outletBy measured value P1、
T1Determine density of gas phase ρg1；By single energy gamma survey hybrid density value ρm, it is known that gas phase quality phase contentRe-define Gas phase is when reaching critical flow according to multiphase flow flowing
The characteristics of velocity of sound flows, can define critical pressure ratioThe formula can by iterative
Obtain critical pressure ratio rc, when actual measurement pressure ratioWhen, then judge the flowing of multiphase flow as critical flow；During critical flow
By formulaCalculate the alternate velocity-slip of gas-liquid
Compare s；
D) the total mass flow rate Q of multiphase flow is calculated respectively by below equationm, gas phase mass flow Qm,gWith liquid phase matter
Amount flow Qm,l：
Total mass flow rate：
Gas phase mass flow：Qm,g=QmGMF
Liquid phase quality flow：Qm,l=Qm(1-GMF)
Wherein：
QmFor total mass flow rate, kg/s
ρg1For density of the gas phase under state at throttle-type nozzle entrance, kg/m3
ρlFor fluid density, kg/m3
GMF is gaseous mass phase content
A is cross-sectional area at the throat of throttle-type nozzle, m2
C is throttle-type nozzle efflux coefficient, is constant
K is the adiabatic exponent of gas
R is the ratio of pressure and pressure at inlet at oil nozzle outlet
S is the alternate velocity-slip ratio of gas-liquid,
Claims (3)
1. in a kind of measurement multiphase flow the respective flow of gas-liquid two-phase critical flow nozzle effusion meter, it is characterised in that including following
Component：
Throttle-type nozzle (1), it has entrance, outlet and throat, and the circulation area of fluid is minimum wherein at throat；
Gamma-ray detector, it includes gamma ray emission device (3) and gamma ray receptor (5), is positioned such that
The gamma ray that gamma ray emission device sends reaches described diametrically through the porch section of the throttle-type nozzle
Gamma ray receptor；
Pressure transducer, is respectively used to measure the pressure at inlet and outlet pressure of the throttle-type nozzle；
Temperature sensor, for measuring the inlet temperature of the throttle-type nozzle.
2. critical flow nozzle effusion meter according to claim 1, it is characterised in that：The throat section of the throttle-type nozzle
The 1/10-1/2 that product is accumulated for its entrance section.
3. critical flow nozzle effusion meter according to claim 1, it is characterised in that：The gamma-ray detector is single energy
Gamma-ray detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621108266.9U CN206114018U (en) | 2016-10-09 | 2016-10-09 | Measure in heterogeneous stream gas -liquid two -phase critical flow nozzle flowmeter of flow separately |
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| CN201621108266.9U CN206114018U (en) | 2016-10-09 | 2016-10-09 | Measure in heterogeneous stream gas -liquid two -phase critical flow nozzle flowmeter of flow separately |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106352931A (en) * | 2016-10-09 | 2017-01-25 | 无锡洋湃科技有限公司 | Critical flow nozzle flowmeter for measuring each gas-liquid two-liquid two-phase flow in multiphase flow and measuring method |
| CN108798648A (en) * | 2018-06-07 | 2018-11-13 | 西南石油大学 | A kind of hypotonic tight gas reservoir improvement positive sequence modified isochronal test method |
-
2016
- 2016-10-09 CN CN201621108266.9U patent/CN206114018U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106352931A (en) * | 2016-10-09 | 2017-01-25 | 无锡洋湃科技有限公司 | Critical flow nozzle flowmeter for measuring each gas-liquid two-liquid two-phase flow in multiphase flow and measuring method |
| CN106352931B (en) * | 2016-10-09 | 2018-02-13 | 无锡洋湃科技有限公司 | The critical flow nozzle flowmeter and measuring method of the respective flow of gas-liquid two-phase in a kind of measurement multiphase flow |
| WO2018064850A1 (en) * | 2016-10-09 | 2018-04-12 | 无锡洋湃科技有限公司 | Critical flow nozzle flowmeter for measuring respective flows of both gas and liquid phases in multiphase flow and measuring method |
| US10704937B2 (en) | 2016-10-09 | 2020-07-07 | Wuxi Sea Pioneers Technologies Co. Ltd | Critical flow nozzle flowmeter for measuring respective flowrates of gas phase and liquid phase in multiphase fluid and measuring method thereof |
| CN108798648A (en) * | 2018-06-07 | 2018-11-13 | 西南石油大学 | A kind of hypotonic tight gas reservoir improvement positive sequence modified isochronal test method |
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