CN1182873A - Three-phase flow meter for oil, gas and water and measuring method thereof - Google Patents
Three-phase flow meter for oil, gas and water and measuring method thereof Download PDFInfo
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Abstract
The oil-gas-water three-phase flow measuring device ,including bypass bend pipe installed between three-way device and three-way pipe adapter, in which a phase separation rate measuring device is installed. When the three-way device is being in first state, the oil well product is flowed in the oil pipeline, and the partial liquid is settled into the bypass bend pipe, also can be placed in second state, and after the oil well product is passed through the bypass bend pipe, then fed into the oil pipeline, and under the condition of two states ,the phase separation rate measuring device can be used for respectively measuring water content WC and gas void fraction GVF, flow velocity measuring device is used to measure flow velocity, V of luid in the oil pipeline and its computer equipment is used to calculate oil volume flow rate Qo, gas volume flow rate Qg and water volume flow rate Qw.
Description
The present invention relates to a kind of on-line metering system and On-line Measuring Method, relate in particular to a kind of multiphase flow rates measurement mechanism and multiphase flow rates measuring method that is applicable to oil well output or flow automatic gauge.
The output of each phase or flow are the basic datas in the oil extraction operation of oil field in the oil of oil well, gas, the water three-phase product, are the main foundations of Monitoring and Controlling oil well and oil reservoir dynamic perfromance.
Up to now, all in the world Oil Producing Countries, comprise China, all be that the well product of many mouthfuls of oil wells is alternately sent into metering separator, by separation vessel well product is separated into three kinds of oil, gas, water (or oil, liquid two kinds) monophasic fluid, then, the output that oil, gas, the single-phase flowmeter of water, thermometer (or temperature transmitter), tensimeter instrument such as (or pressure units) measure three kinds of fluids is installed respectively on the oil of separation vessel, gas, water discharge pipe separately.When metering separator was separated into gas, gas-liquid two-phase liquid to well product, the oil in the liquid phase, aquatic products amount were measured with sample examination method, average density method, vibration densitometer and rotz flowmeter or blade flowmeter usually.Said method exists following several shortcoming.
In fact, the metering separator of prior art is difficult to accomplish well product is separated into oil, gas, three kinds of monophasic fluids of water.Usually, separation vessel can only be separated into well product association rock gas and two kinds of fluids of oil-water mixture.Wonder pure oil yield and aquatic products amount, also need oil-water mixture is carried out bearing analysis.
Because many mouthfuls of oil wells use same separation vessel, can't realize continuous measurement for the single port oil well, the representativeness that causes measuring the result is poor.
For barreler, the inferior separating effect of separation vessel causes the measuring error of single-phase flow instrument and bearing analysis instrument big.
Because the separation vessel discharge opeing is not thorough, the oil-water mixture of each mouthful oil well mixes mutually bottom separation vessel, causes moisture instrument measurement representative poor, therefore causes pure oil yield of individual well and oil-water mixture density measure inaccurate.
Because the structure and the flow process complexity of the triphase separator in the metering plant need the link of control more, thus cause building a station, operation, maintenance cost height, and be unfavorable for realizing the robotization of production run and management.For Desert Oilfields and marine hydraulic fluid port, this problem In-particular is for outstanding.
First purpose of the present invention is to provide a kind of oil-gas-water three phase flow quantity measurement mechanism.
Second purpose of the present invention is to provide a kind of oil-gas-water three phase flow quantity measuring method.
For realizing first purpose, the invention provides a kind of oil-gas-water three phase flow quantity measurement mechanism, comprising: three-way device and tee pipe coupling are installed on the oil pipeline in proper order; The bypass bend pipe is installed between above-mentioned three-way device and the above-mentioned tee pipe coupling; The control device of three-way device, make when above-mentioned three-way device is in first state, well product circulates in oil pipeline, make the partially liq in the well product sink to above-mentioned bypass bend pipe simultaneously at above-mentioned three-way connection place, and when above-mentioned three-way device is in second state, the well product bypass bend pipe of at first flowing through, and then enter oil pipeline and normally circulate; Heterogeneous fluid phase fraction measurement device, be installed on the above-mentioned bypass bend pipe, when above-mentioned three-way device is in first state, be used for measuring the water percentage WC of above-mentioned bypass bend pipe fluid, and when above-mentioned three-way device is in second state, be used for measuring the void fraction GVF of above-mentioned bypass bend pipe fluid; Flow rate measuring device is installed on the oil pipeline, is used for measuring oil pipeline flow rate of fluid V; Calculation element, be used to calculate oil volume rate of discharge Qo, gas volume rate of discharge Qg and water volume rate of discharge Qw, computing formula is respectively: Qo=V * S * (1-GVF) * (1-WC), Qg=V * S * GVF and Qw=V * S * (1-GVF) * WC wherein, S is that cross-section of pipeline is long-pending.
For realizing second purpose, the invention provides a kind of oil-gas-water three phase flow quantity measuring method, may further comprise the steps: when well product normally circulates in oil pipeline, make the partially liq in the well product sink to the bypass bend pipe, measure the water percentage WC of liquid in the bypass bend pipe, make well product enter the bypass bend pipe from oil pipeline, behind the bypass bend pipe, returning oil pipeline more normally circulates, measure flow rate of fluid V in the oil pipeline, measure the void fraction GVF of fluid in the bypass bend pipe, calculate oil volume rate of discharge Qo, gas volume rate of discharge Qg and water volume rate of discharge Qw, computing formula is respectively: Qo=V * S * (1-GVF) * (1-WC), Qg=V * S * GVF and Qw=V * S * (1-GVF) * WC wherein, S is that cross-section of pipeline is long-pending.
Oil-gas-water three phase flow quantity measurement mechanism of the present invention, can be directly installed on the oil pipeline, and can under the unseparated state of oil gas water three phase mix products, carry out automatic gauge to indexs such as the flow quantity rate in the oil well oil gas water three phase mix products, air-flow dose rate, oily rate of discharge, current dose rate and water percentage, oil temperature, pipe pressures.Constitute individual well or production crew's output integrated test system.Production fluid amount, gas production rate, pure oil yield, water percentage, mixed liquor density, the oil automatic on-line warm, that manage dynamic parameters such as pressure of realizing individual well or production crew under not separation of oil gas water three phase state measures.Thereby can cancel metering separator, simplify oil production technology, improve production automation degree, reduce the production of hydrocarbons cost.It is applicable to Desert Oilfields or offshore oilfield apparatus and method In-particular of the present invention.
Other advantages of device of the present invention are: this device can be connected in series simple installation with the on-the-spot pipe laying of all size by joint flange.In addition, senser element does not have any contact with measured medium, and sensor mechanism does not have any infringement to measured medium.Therefore, be applicable to abominable working condition and unattended production environment.Measurement data and MEDIA FLOW are synchronous, and measurement result is representative.
In addition, select the computing machine of different class for use, realize continuously, the automatic output of automatic on-line measurement and measurement result.
Utilize a microcomputer system (main frame is an inserter structure) to monitor to the device so a plurality of (as 10).Interface circuit has interface card and the serial communication interface and the printer interface of multichannel simulation signal, switching signal, digital signal, and all kinds of instrument that can generally use with the oil field or communication facilities etc. connect, and can realize the remote data transmission of measurement result.
By below in conjunction with the detailed description of accompanying drawing to better embodiment of the present invention, other purposes of the present invention, feature and advantage will be more obvious.
Fig. 1 is the synoptic diagram of one embodiment of the present invention;
Fig. 2 is a kind of implementation synoptic diagram of three-way device among Fig. 1;
Fig. 3 is the synoptic diagram of the another kind of implementation of three-way device among Fig. 1;
Fig. 4 is the main process flow diagram of method of the present invention.
Describe embodiments of the present invention in detail below in conjunction with accompanying drawing.
Fig. 1 shows a kind of embodiment of oil-gas-water three phase flow quantity measurement mechanism of the present invention.In Fig. 1, label 1 is represented oil pipeline, and 2 represent three-way device, and 3 represent tee pipe coupling, 4 represent upstream sensor, 5 representation temperature transmitters, 6 representative pressure transmitters, 7 represent downstream sensor, and 8 represent heterogeneous fluid phase fraction measurement device, and 9 represent the bypass bend pipe.
The oil-gas-water three phase flow quantity measurement mechanism of this embodiment is to constitute like this: three-way device 2, tee pipe coupling 3, upstream sensor 4 and downstream sensor 7 are installed on oil pipeline 1 successively.Between three-way device 2 and tee pipe coupling 3, connect bypass bend pipe 9, heterogeneous fluid phase fraction measurement device 8 is installed on bypass bend 9.Upstream sensor 4, downstream sensor 7 and heterogeneous fluid phase fraction measurement device 8 are exported electric signal respectively.These electric signal are input to the signal transmitting device respectively, are input to the microsystem (not shown) again after being changed by the signal transmitting device.Special use control and software for calculation that this microsystem utilization is contained are therein handled and computing the data that collect, then the measurement results such as rate of discharge of output oil, gas, water three-phase.This microsystem is also controlled the action of three-way device 2 by the signal transmitting device.
Under the control of microsystem, three-way device 2 can be in following two states respectively:
First kind of state, make in the oil pipeline 1 appropriate amount of fluid in the well product of circulation through tee pipe coupling 3 since collision effect and action of gravity be deposited in the bypass bend pipe 9;
Second kind of state changes by three-way device 2 well product that circulates in the oil pipeline 1 and circulates through bypass bend pipe 9, returns oil pipeline 1 through tee pipe coupling 3 then.
Three-way device 2 can be accomplished in several ways.
For example, as shown in Figure 2, can constitute by two two logical motorized valves (or solenoid valve) 10 and 11.When two logical motorized valves 11 are opened, two logical motorized valve 10 closures, well product is through oil pipeline 11 circulations.At this moment, be in first kind of state.When two led to motorized valve 11 closures, two logical motorized valves 10 were opened, and well product is through 9 circulations of bypass bend pipe.At this moment, be in second kind of state.By the cooperation of above-mentioned two logical motorized valves 10 and 11, realized the function of three-way device 2.
In addition, as shown in Figure 3, three-way device 2 also can be realized by an electric three-way valve (or solenoid valve) 12.When electric three-way valve 12 was in A-＞B conducting state (i.e. first kind of state), A-＞C closed, and well product can only be through oil pipeline 1 circulation.When electric three-way valve 12 was in A-＞C conducting state (i.e. second kind of state), A-＞B closed, and well product enters 9 circulations of bypass bend pipe by oil pipeline 1.
Under above-mentioned first kind of state, because in the bypass bend pipe 9 be liquid, so the water percentage WC of this part liquid in 8 pairs of bypass bend pipes of heterogeneous fluid phase fraction measurement device 9 measures.The measurement of water percentage WC has several different methods.Be that example describes with the dual intensity gamma ray sensor below, but be not construed as limiting the invention.
The dual intensity gamma ray sensor is made up of a dual intensity gamma-ray source, a gamma-ray detector and a process pipe that loads radiographic source and detector.Dual intensity gamma-ray source and gamma-ray detector are installed in respectively along on the pipelines on two sides wall of process pipe axis symmetry.This dual intensity gamma ray sensor was counted the gamma ray of two kinds of energy in the unit interval, and counting rate is respectively Nw and Mw (unit is Hz).Microsystem obtains counting rate Nw and Mw, utilizes following formula to calculate the water percentage WC of this part liquid:
WC＝[d0×ln(N0/Nw)-b0×ln(M0/Mw)]/
In [a0 * ln (M0/Mw)-c0 * ln (N0/Nw)] (1) formula (1), a0, b0, c0, d0, N0 and M0 are physical property, dual intensity gamma ray sensor measuring channel physical dimension and the relevant constants of radiation intensity with tested oil, water.
Under above-mentioned second kind of state, because in the bypass bend pipe 9 be well product, so the void fraction GVF of this part fluid in 8 pairs of bypass bend pipes of heterogeneous fluid phase fraction measurement device 9 measures.The measurement of void fraction GVF is known.In this example, adopt the device identical with the measurement mechanism of water percentage WC, promptly same dual intensity gal radiation transducers carries out.
The dual intensity gamma ray sensor was counted the gamma ray of two kinds of energy in the unit interval, and counting rate is respectively Ng and Mg (unit is Hz).Microsystem can calculate the void fraction GVF of well product according to the water percentage WC of formula (1) calculating, and computing formula is as follows:
GVF=1-ln (N0/Ng)/(a0 * WC+b0) (2) or
GVF=1-ln (M0/Mg)/(Ng in (3) formula (2) of c0 * WC+d0) and the Mg in the formula (3) are respectively the counting rates (unit is Hz) of the gamma ray of two kinds of energy recording of dual intensity gamma ray sensor.
More than, heterogeneous fluid phase fraction measurement device 8 usefulness dual intensity gamma ray sensors are realized.But this is not unique, as long as can measure the void fraction GVF of well product and the water percentage WC of oil-water mixture simultaneously.
Upstream sensor 4 and downstream sensor 7 be two to the physical property qualitative difference sensor sensitive between gas and the liquid, can be radiation transducers, capacitive transducer, conductivity sensor, density sensor, sonac etc.With the density sensor is that example describes.
When first kind of state, the fluid of flow through upstream sensor 4 and downstream sensor 7 is common well products.And when being transformed into second kind of state, because the original liquid that is detained enters oil pipeline 1 through tee pipe coupling 3 in the bypass bend pipe 9, and the density of this part liquid group is different with the density of usually oil well effluent, so when crossing upstream sensor 4 and downstream sensor 7, will on the time history of the upstream sensor 4 and the output signal of downstream sensor 7, successively cause a significant and similar variation respectively as this liquid bolus flow of flow mark.Carry out known computing cross-correlation, can obtain the transit time τ of liquid group between upstream sensor 4 and downstream sensor 7 as the flow mark.Experiment showed, that transit time τ has represented the flowing time of well product in this segment pipe.So, the mean flow rate V of well product in this segment pipe can obtain by following formula:
In V=L/ τ (4) formula (4), L is the centre distance between upstream sensor 4 and the downstream sensor 7.
In addition, need to prove that upstream sensor 4 and downstream sensor 7 cooperatively interact and constitute a kind of flow rate measuring device, are used to measure the flowing velocity of well product in the oil pipeline 1.Above-mentioned upstream sensor 4 and downstream sensor 7 are not construed as limiting the invention.
According to the water percentage WC that has recorded, mean flow rate V, void fraction GVF and the known long-pending S of cross-section of pipeline, can determine the volume flow dose rate of the oil gas water three phase under the pipeline conditions.The computing formula of oil volume rate of discharge Qo, gas volume rate of discharge Qg and water volume rate of discharge Qw is respectively:
Qo＝V×S×(1-GVF)×(1-WC) (5)
Qg＝V×S×GVF (6)
Qw＝V×S×(1-GVF)×WC (7)
In addition, temperature transmitter 5 and pressure unit 6 can be installed on oil pipeline 1, respectively the temperature and pressure in the measuring channel.Then, volume flow dose rate Qo, Qg, Qw according to the oil gas water three phase under the pipeline conditions, and measured temperature and pressure, and, just can calculate the volume flow dose rate of the oil gas water three phase under the standard state according to the compressibility coefficient and the expansion coefficient of known oil, gas, water.
Generally speaking, the pressure in the oil pipeline of ground is between 0.5 MPa～1.0 MPas, in the well product in rock gas the absorptivity of gamma ray is far smaller than crude oil and the mineralized water absorptivity to gamma ray.Therefore, in formula (1), (2) and (3), ignored the absorption effect of rock gas, this accuracy class that can not influence the oil-gas-water three phase flow quantity measurement mechanism of ignoring.
Used physical constant a0, b0, c0, d0, N0 and M0 can obtain by the dual intensity gamma ray sensor being carried out following demarcation measure in formula (1), (2) and (3):
1) in the process pipe of dual intensity gamma ray sensor under the state of vacuum or when being full of air under the normal pressure (air under the normal pressure can be ignored to the absorption effect of gamma ray), measure the counting rate of the ray of two kinds of energy respectively, be designated as Nv and Mv (unit is Hz);
2) in the process pipe of dual intensity gamma ray sensor, fill the pure crude oil sample that tested oil well production goes out, measure the counting rate of the ray of two kinds of energy then respectively, be designated as Np and Mp (unit is Hz);
3) in the process pipe of dual intensity gamma ray sensor, fill the pure mineralized water sample that tested oil well production goes out, measure the counting rate of the ray of two kinds of energy then respectively, be designated as Nm and Mm (unit is Hz);
4) calculate above-mentioned physical constant by following:
N0＝Nv (8)
M0＝Mv (9)
a0＝ln(Np/Nm) (10)
b0＝ln(Nv/Np) (11)
c0＝ln(Mp/Mm) (12)
d0＝ln(Mv/Mp) (13)
Because the half life period of used radiographic source americium-241 reaches 433 years, therefore, the Nv in the above-mentioned formula, Mv, Np, Mp, Nm and Mm effectively demarcate in the phase and all can be considered as constant approx being generally three flow measurement devices that have.This approximate accuracy class that can not influence the oil-gas-water three phase flow quantity measurement mechanism equally.
The above-mentioned dual intensity gamma ray sensor that utilizes is measured void fraction GVF in the well product and the water percentage WC in the oil-water mixture, can overcome the shortcoming of dual intensity gamma ray sensor rapid variation of measuring accuracy under high gassiness condition effectively.
The electric signal of upstream sensor 4, downstream sensor 7 and heterogeneous fluid phase fraction measurement device 8 is input to microsystem through after known amplification and screening line transfer by known timer conter.The current signal of 4～20mA of temperature transmitter 5 and pressure unit 6 outputs is input to microsystem by analog to digital converter be converted to the voltage signal of 1～5V through measuring resistance after.
Above-mentioned microsystem can add that special-purpose control and software for calculation constitute by known one-chip computer or known Industrial Control Computer or known personal computer and peripherals thereof.
Fig. 4 is the main process flow diagram of oil-gas-water three phase flow quantity measuring method of the present invention.In step 41, when well product normally circulates in oil pipeline, make the partially liq in the well product sink to the bypass bend pipe.In step 42, measure the water percentage WC of liquid in the bypass bend pipe.In step 43, make well product enter the bypass bend pipe from oil pipeline, behind the bypass bend pipe, return oil pipeline again and normally circulate.In step 44, measure flow rate of fluid V in the oil pipeline.In step 45, measure the void fraction GVF of fluid in the bypass bend pipe.Step 44 and 45 can be carried out simultaneously.In step 46, utilize above-mentioned formula (5), (6) and (7) to calculate oil gas volume flow dose rate oil volume rate of discharge Qo, gas volume rate of discharge Qg and water volume rate of discharge Qw.
In the experiment that the inventor did, upstream sensor 4 and downstream sensor 7 all adopt the monoenergetic gamma ray sensor, and heterogeneous fluid phase fraction measurement device 8 adopts the dual intensity gamma ray sensor.Heterogeneous fluid phase fraction measurement device 8 and upstream sensor 4 and downstream sensor 7 adopt identical physical construction, different just heterogeneous fluid phase fraction measurement devices 8 adopted the compound dual intensity γ of americium-Yin source, then both have adopted americium-241 monoenergetic γ source.Above-mentioned gamma ray sensor is by compositions such as low energy gamma ray source, beam collimation device, measuring channel and NaI (Tl) crystal counters.The activity that americium-241 monoenergetic source selects for use Chinese atomic energy research institute to produce is the double-layer stainless steel sealed source of 25mCi.NaI (Tl) the crystal counter subassembly that NaI (Tl) crystal counter selects for use BeiJing, China nuclear instrument factory to produce.
It should be noted that above-mentioned gamma ray sensor just is used for explanation, is not construed as limiting the invention here.
Upstream sensor 4, downstream sensor 7 add that signal transmitting device and microcomputer system constitute a simple crosscorrelation velocimeter.The simple crosscorrelation velocimeter is measured the transit time between the measurement cross section that flow is marked at upstream sensor 4 and downstream sensor 7.Two duct lengths of measuring between the cross section are 5～50 times of pipe diameter.Preceding straight pipeline had been installed before upstream sensor 4, and its length is 10～20 times of pipe diameter.Back straight pipeline has been installed after downstream sensor 7, and its length is 5～10 times of pipe diameter.Constitute a cross-correlator by timer conter in the signal transmitting device and the microsystem that comprises software for calculation.Two passages of timer conter write down the time history of counting rate of the electric impulse signal of upstream sensor 4, downstream sensor 7 outputs respectively.The software for calculation that is installed in the microcomputer carries out computing cross-correlation to data.The sampling period of timer conter is 1～5ms, and known pointwise formula computing method is adopted in the calculating of cross correlation function.
Computer system adopts the Industrial PC Computer of MCS-51 or MCS-96 series monolithic and different class, realizes continuously, the automatic output of automatic on-line measurement and measurement result.
By above-mentioned experiment, can reach following technical indicator:
1) complete machine:
1. measurement of water ratio scope: 0～60%
2. measurement of water ratio error≤2%
3. void fraction measurement range: 55～95%
4. daily fluid production rate measuring error≤5%
5. daily gas measurement amount error 10%
6. power supply: 220V ± 30V, 50Hz
7. power consumption :≤100W
2) Sensor section:
Measure caliber: inside nominal diameter 25～250mm
Environment temperature :-20～80 ℃ (normal temperature detector)
-40-120 ℃ (high temperature detector)
Environment temperature :≤95% (relative humidity)
Gamma-ray source: americium-241, photon energy 59.5kev, 433 years half life period
Leaking dose: the resident's acceptable dose that meets national regulation
3) signal transmitting device and microsystem:
Automatically carry out data acquisition and data processing, the on-line continuous metering system
The way of output: report printing output; The TTL fiduciary level sends
Output content: liquid measure, oil mass, the water yield, tolerance, water percentage, mixed liquor are close
Degree, temperature, pressure etc.
Environment temperature :-20～60 ℃
Ambient humidity :≤65% (relatively)
Though below describe embodiments of the present invention in conjunction with the accompanying drawings in detail,, can make various modifications and changes to above-mentioned embodiment, and not deviate from the spirit and scope of the invention for those skilled in the art in this area.Therefore, scope of the present invention only is defined by the claims.
Claims (9)
1. oil-gas-water three phase flow quantity measurement mechanism is characterized in that comprising:
Three-way device (2) and tee pipe coupling (3), order is installed on the oil pipeline (1),
Bypass bend pipe (9) is installed between described three-way device (2) and the described tee pipe coupling (3),
The control device of three-way device (2), make when described three-way device (2) is in first state, well product circulates in oil pipeline (1), make the partially liq in the well product locate to sink to described bypass bend pipe (9) simultaneously at described three-way connection (3), and when described three-way device (2) is in second state, the well product bypass bend pipe (9) of at first flowing through, and then enter the normal circulation of oil pipeline (1)
Heterogeneous fluid phase fraction measurement device (8), be installed on the described bypass bend pipe (9), when described three-way device (2) is in first state, be used for measuring the water percentage WC of described bypass bend pipe (9) fluid, and when described three-way device (2) is in second state, be used for measuring the void fraction GVF of described bypass bend pipe (9) fluid
Flow rate measuring device (4,7) is installed on the oil pipeline (1), is used for measuring oil pipeline (1) flow rate of fluid V,
Calculation element is used to calculate oil volume rate of discharge Qo, gas volume rate of discharge Qg and water volume rate of discharge Qw, and computing formula is respectively:
Qo＝V×S×(1-GVF)×(1-WC)
Qg＝V×S×GVF
Qw=V * S * (1-GVF) * WC wherein, S is that cross-section of pipeline is long-pending.
2. according to the device of claim 1, it is characterized in that:
Described flow rate measuring device (4,7) comprise upstream sensor (4) and downstream sensor (7), be installed in respectively on the oil pipeline (1), be in the downstream of described three-way connection (3), and at a distance of certain distance, be used for the variation of the physical property of the described oil pipeline of sensing (1) fluid, and under the more stable situation of the fluid flow state in oil pipeline (1), when described three-way device (2) enters second state, utilization is carried out cross correlation measurement from the liquid group that described bypass bend pipe (9) the is discharged signal that serves as a mark.
3. according to the device of claim 1, it is characterized in that:
Described heterogeneous fluid phase fraction measurement device (8) comprises the dual intensity gamma ray sensor.
4. according to the device of claim 2 or 3, it is characterized in that also comprising:
Temperature transmitter (5) and pressure unit (6) are respectively applied for the temperature and pressure that detects fluid in the oil pipeline (1), thus oil volume rate of discharge, gas volume rate of discharge and water volume rate of discharge under the described calculation element basis of calculation state.
5. according to the device of claim 1, it is characterized in that:
The control device and the described calculation element of described three-way device (2) are realized with computer system.
6. oil-gas-water three phase flow quantity measuring method may further comprise the steps:
When well product normally circulates in oil pipeline (1), make the partially liq in the well product sink to bypass bend pipe (9),
Measure the water percentage WC of liquid in the bypass bend pipe (9),
Make well product enter bypass bend pipe (9), behind bypass bend pipe (9), return the normal circulation of oil pipeline (1) again from oil pipeline (1),
Measure flow rate of fluid V in the oil pipeline (9),
Measure the void fraction GVF of fluid in the bypass bend pipe (9),
Calculate oil volume rate of discharge Qo, gas volume rate of discharge Qg and water volume rate of discharge Qw, computing formula is respectively:
Qo＝V×S×(1-GVF)×(1-WC)
Qg＝V×S×GVF
Qw=V * S * (1-GVF) * WC wherein, S is that cross-section of pipeline is long-pending.
7. according to the method for claim 6, it is characterized in that:
The step of flow rate of fluid V is to utilize two sensors that are installed on the oil pipeline at a distance of certain distance to carry out in the described measurement oil pipeline, described two sensors are to the variation sensitivity of the physical property of fluid in the oil pipeline, and utilize the signal that serves as a mark, carry out cross correlation measurement from the liquid group that described bypass bend pipe (9) is discharged.
8. according to the method for claim 6, it is characterized in that:
The step of the water percentage WC of liquid utilizes the dual intensity gamma ray sensor to carry out in the described measurement bypass bend pipe.
9. according to the method for claim 7 or 8, it is characterized in that further comprising the steps of:
Detect the temperature and pressure of fluid in the oil pipeline, and
Oil volume rate of discharge, gas volume rate of discharge and water volume rate of discharge under the basis of calculation state.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96121029 CN1065958C (en) | 1996-11-19 | 1996-11-19 | Three-phase flow meter for oil, gas and water and measuring method thereof |
| PCT/CN1997/000132 WO1998022783A1 (en) | 1996-11-19 | 1997-11-19 | A device and a method of measuring flow rate for a three phase fluid |
| AU50469/98A AU5046998A (en) | 1996-11-19 | 1997-11-19 | A device and a method of measuring flow rate for a three phase fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96121029 CN1065958C (en) | 1996-11-19 | 1996-11-19 | Three-phase flow meter for oil, gas and water and measuring method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1182873A true CN1182873A (en) | 1998-05-27 |
| CN1065958C CN1065958C (en) | 2001-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96121029 Expired - Lifetime CN1065958C (en) | 1996-11-19 | 1996-11-19 | Three-phase flow meter for oil, gas and water and measuring method thereof |
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| CN (1) | CN1065958C (en) |
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| WO2004102131A1 (en) * | 2003-05-16 | 2004-11-25 | Haimo Technologies Inc. | Three-phase flow regulating means for oil, gas and water, three-phase flow measuring apparatus for oil, gas and water and measuring method thereof |
| WO2009018694A1 (en) * | 2007-08-07 | 2009-02-12 | Shanghai Medeng Electronic Equipment Co., Ltd. | A multiphase flow metering method and a multiphase flow meter using the same |
| WO2011054192A1 (en) * | 2009-11-07 | 2011-05-12 | 兰州海默科技股份有限公司 | Water removing device for extremly high water content three-phase flow, and measurement device and method for exrtremly hign water content three-phase flow |
| CN102087298A (en) * | 2011-01-25 | 2011-06-08 | 兰州海默科技股份有限公司 | Gamma ray section imaging device, and flow measurement device and method for multiphase flow |
| US8025713B2 (en) | 2003-05-16 | 2011-09-27 | Haimo Technologies, Inc. | Adjustable gas-liquid centrifugal separator and separating method |
| CN101260802B (en) * | 2008-04-22 | 2011-12-14 | 天津大学 | Oil, gas and water three phase oil well continuous metering device and its measurement method |
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1996
- 1996-11-19 CN CN 96121029 patent/CN1065958C/en not_active Expired - Lifetime
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