CN203881381U - Integrated device for on-line measurement of oil-water-gas three-phase flow within full-measuring-range - Google Patents
Integrated device for on-line measurement of oil-water-gas three-phase flow within full-measuring-range Download PDFInfo
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- CN203881381U CN203881381U CN201320859265.8U CN201320859265U CN203881381U CN 203881381 U CN203881381 U CN 203881381U CN 201320859265 U CN201320859265 U CN 201320859265U CN 203881381 U CN203881381 U CN 203881381U
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Abstract
The utility model relates to an integrated device for on-line measurement of oil-water-gas three-phase flow within a full-measuring-range. The integrated device comprises following members: a venturi pipe flowmeter (3), a first double-energy gamma ray phase fraction instrument (2), an on-line liquid sampling device (4), a second double-energy gamma ray phase fraction instrument (5), a data collecting and processing system (6) and a gas-liquid re-converging pipeline (7). The first double-energy gamma ray phase fraction instrument (2) is arranged at an inlet or a throat of the venturi pipe flowmeter (3). The on-line liquid sampling device (4) is arranged downstream the venturi pipe flowmeter and comprises an inlet pipeline (4-1), a swirl chamber (4-2), a collision chamber (4-4), a gas outlet pipeline (4-5) and a liquid outlet pipeline (4-3). One end of the inlet pipeline is communicated with a venturi pipe and the other end of the inlet pipeline is tangentially communicated to the swirl chamber, above which the collision chamber is arranged. At least one screen mesh is arranged in the collision chamber. The gas outlet pipeline is disposed at the top of the collision chamber. The liquid outlet pipeline is disposed at the side wall of the bottom of the collision chamber and bends upwardly after leaving out of the swirl chamber so that the liquid outlet pipeline containing a segment of vertical pipeline is formed. The second double-energy gamma ray phase fraction instrument (5) is arranged at a vertical pipeline. The venturi pipe flowmeter (3), the on-line liquid sampling device (4) and the gas-liquid re-converging pipeline (7) are configured to be of an integral structure.
Description
Technical field
The utility model belongs to oil in oilfield exploitation and production run, gas, water multiphase flow metering field.Particularly, the utility model relates to the integrated apparatus of the multiphase flow rates that a kind of online gamut measurement comprises oil, gas, water.
Background technology
Polyphasic flow is often referred to and has two or more material or flowing of phase simultaneously, comprises biphase gas and liquid flow, Dual-Phrase Distribution of Gas olid, liquid fixed double phase flow, liquid-liquid diphasic flow and liquid-liquid and gas-liquid-solid multiphase flow.Due in Multiphase Flow each mutually between Presence of an interface effect and relative velocity, phase interface in time with on space, be all random variable, make its flow characteristics more than single-phase flow system complex, its characteristic parameter is also many than single-phase flow system.
In oil field, the oil phase in oil, gas, water multiphase refers to the liquid hydrocarbon phase in produced liquid in oil well, and gas phase refers to rock gas, lighter hydrocarbons, non-light hydrocarbon gas, and water mainly refers to mineralized water, also has the solid phase (sand, wax and hydrate etc.) of minute quantity simultaneously.And oil, gas, water multiphase metering are monitoring, the Main Basis of controlling oil well and oil reservoir dynamic perfromance, be mainly used in adding up produce oil and the feed status of oily well yield and distribution, monitoring oil well.
For rational exploitation crude oil, need every mouthful of oily well yield of monitors oil Tanaka.Traditional metering method is use test separation vessel, but that the shortcoming of use test separation vessel is flow process is complicated, expensive, bulky.In addition, also to lay special testing conduit for every mouthful of oil well.In recent years, the development priority of Petroleum Industry in Foreign focuses on sea gradually, and in marine petroleum development, owing to being subject to platform area and heavily quantitative limitation, traditional multi-phase separation metering has lost it self advantage.As for the physical construction of multi-phase flowmeter, be more prone to non-insertion, can avoid like this generation of sensor corrosion and additional voltage drop.Along with the exploitation of hp-ht well is more and more general, the quantity that reduces interface in manifold is just more and more important.
The quantitative model of oil, gas, water multiphase is mainly divided into several as follows:
Separate type quantitative model: detected fluid is carried out using single-phase metering instrument after three phase separation, separated efficiency directly affects the precision of measurement, sometimes separation vessel itself is exactly a system, while is due to the existence of separation vessel, volume and weight is all larger, at sea on oil well, use and be subject to certain restrictions, be difficult to realize on-line measurement, the expense of maintenance is also higher.
Part separate type quantitative model: the gas in detected fluid is separated, then gas, the mixed stream of profit are measured.In the trial period, although do not accomplish complete separation, volume and weight is less compared with separate type metering at present, and the expense of safeguarding is also higher.
Separate type quantitative model not: polyphasic flow is not carried out to separation, the information such as flow of direct-detection polyphasic flow.Realize online measurement in real time, volume is little, and conserve space is adapted at offshore platform and promotes, and the expense of manual maintenance is few compared with separate type metering and the metering of part separate type.Can directly on oil and gas multiphase flow pipeline, measure the instantaneous delivery of oil, gas, each phase of water multiphase, minimizing equipment and operating personnel, can replace metering separator and supporting measuring instrument and control device, save metering pipeline, manifold and the expense of building a station, thereby significantly reduce the technological process of production, shortening oilfield construction cycle and the operation cost etc. in oil field investment, simplification oil field.
And oil, gas, water multiphase not the difficult point main manifestations of separated quantitative model have the following aspects:
(1) each phase non-uniform mixing, it is separated that each composition trends towards keeping.(2) each flows with different speed, Presence of an interface effect and relative velocity between gas phase and liquid phase, and phase interface changes larger on time and space.(3) each not mixes mutually, and gas and liquid is in released state.(4) between each phase, exist and interact, in gas from liquid, overflow, or by liquid absorption, wax and hydrate can be precipitated out etc. from fluid.(5) flow pattern is very complicated, and characteristic parameter is more than single-phase flow system, and it depends on relative velocity, fluid behaviour, pipeline structure and flow direction between each phase.For solving above difficult point, key point is to set up reasonable product structure design and measurement model, payes attention to choosing of characteristic parameter, selects reliable sensor, simultaneously the data processing method of application of advanced.
Along with the development of petroleum industry, multi-phase flowmeter will be used more and more, and it also will be further developed.But the challenge facing in development is many-sided, be mainly the problem that will solve two aspects: the one, some multi-phase flowmeters on market are because of complex structure and dispersion, and prevailing price is high, and expense has been lowered into a main target; The 2nd, how the measuring accuracy of multi-phase flowmeter and on-the-spot broad applicability, improve measuring accuracy and strengthen multi-phase flowmeter in the adaptability of different working conditions, as solved void fraction gamut, includes water gaging precision problem.In addition, from long-range challenge, the exploitation of subsurface flowmeter will have meaning, subsurface flowmeter can operate in actual oil well, the valuable information such as relevant which kind of fluid of oil well piece regional production can be provided, can improve oil well management like this, and make sooner, more accurate oil well production determines, this just requires multi-phase flowmeter to miniaturization development and can under more extreme condition, apply and have the reliability of height.So the international trend of multi-phase flowmeter is miniaturization, intellectuality, high precision int, low cost, wide adaptability, safe and compact conformation.In a word, along with the actual demand of market to multi-phase flowmeter, the integrated system that multi-phase flowmeter product all combines in a module by the electronic component of survey sensor and collection, storage and transmission data will become following modular system.
Therefore, comprehensive above factor, this area needs a kind of can structure height compact integrated and online water percentage of measuring in real time within the scope of void fraction gamut accurately, thereby guarantee to realize and comprise oil, gas, the apparatus and method that the multiphase flow rates of water is accurately measured, and adopt noncontact, the technical scheme of real time dynamic measurement, so that eliminate fluid physical property viscosity of crude, emulsification, bubble, salineness, impact measurement being brought containing factors such as sand, the extensive adaptability of enhancing equipment and raising measuring accuracy, so that the production of in time correct assurance oil well is dynamic, specific aim takes measures oil reservoir to carry out scientific management.
Above-mentioned target realizes by apparatus and method of the present utility model.
Utility model content
The utility model provides a kind of integrated apparatus of gamut on-line measurement Oil, Water, Gas three-phase flow, and it comprises with lower member:
An Oil, Water, Gas three-phase integrated apparatus for flow separately in on-line measurement polyphasic flow, it comprises with lower member:
Differential pressure type flowmeter (3), it is vertically placed;
Be arranged in the first dual intensity gamma ray phase fraction instrument (2) at porch or the throat place of described differential pressure type flowmeter (3), it comprises dual intensity gamma ray generator and gamma detector, the arrangement of the two makes the gamma rays that described dual intensity gamma rays generator sends can radially pass the porch of described differential pressure type flowmeter or the cross-section of pipeline that throat locates, and reaches described gamma ray detector;
Online fluid sampling device (4), it is arranged in the downstream of described differential pressure type flowmeter, and it comprises: inlet duct (4-1), eddy flow chamber (4-2), collision chamber (4-4), gas vent pipeline (4-5) and liquid outlet pipeline (4-3), wherein said inlet duct one end is communicated with described Venturi tube, the other end is and is tangentially communicated to described eddy flow chamber, top, described eddy flow chamber arranges collision chamber, at least one deck screen cloth is set in this collision chamber, described gas vent pipeline is positioned at collision top of chamber, described liquid outlet pipeline is positioned on the sidewall of bottom, eddy flow chamber, and be bent upwards after leaving eddy flow chamber, the liquid outlet pipeline that formation comprises one section of vertical pipeline,
Be arranged in the second dual intensity gamma ray phase fraction instrument (5) at described vertical pipeline place, it comprises dual intensity gamma ray generator and gamma detector, the arrangement of the two makes the gamma rays that described dual intensity gamma rays generator sends radially to pass described vertical pipeline xsect, reaches described gamma ray detector;
Data acquisition processing system (6);
Gas-liquid is heavily converged pipeline (7), and the gas in the liquid in described liquid outlet pipeline and described gas vent pipeline converges again at this, then flows out described integrated apparatus;
Wherein, described differential pressure type flowmeter (3), described online fluid sampling device (4) and described gas-liquid are heavily converged pipeline (7) and are made into integral structure.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is cut-open view of the present utility model.
Wherein each Reference numeral implication is as follows:
1, blind threeway; 2, the first dual intensity gamma ray phase fraction instrument; 3, differential pressure type flowmeter; 4, online fluid sampling device; 5, the second dual intensity gamma ray phase fraction instrument; 6, data acquisition system (DAS); 7, gas-liquid is heavily converged pipeline; 4-1, inlet duct; 4-2, eddy flow chamber; 4-3, liquid outlet pipeline; 4-4, collision chamber; 4-5, gas vent pipeline;
Fig. 3 is the measurement procedure figure of the utility model when work.
Embodiment
For the ease of understanding the utility model, first some terms in multiphase flow metering field are simply described below:
" polyphasic flow " refers to the fluid-mixing consisting of gas phase, liquid phase.Wherein liquid phase can be divided into oil phase and water, and oil phase is mainly crude oil, the water that water is used while mainly carrying out waterfrac treatment from underground water and for recover petroleum, and oil phase and water be immiscible substantially.Gas phase can be stratum associated gas, for example various alkane.
" vertically " refer to acceleration of gravity direction in the same way or oppositely.
" level " refers to the direction that is 90 ° of angles with acceleration of gravity direction.
" phase fraction " refers to liquid phase in polyphasic flow (being divided into again oil phase or water) or the shared number percent of gas phase.Phase fraction is divided into linear phase fraction, cross section phase fraction, volume phase fraction conventionally, and in measuring in polyphasic flow, we need to suppose that three-phase medium evenly mixes conventionally.In measurement, conventionally can in polyphasic flow pipeline, be provided with the device that special promotion fluid mixes, such as mixer or baffle or blind threeway etc., so that oil gas water three phase fully mixes, so that actual conditions reach or approach as far as possible the hypothesis of above-mentioned " evenly mixing ".Wherein blind threeway is a kind of T tube, and an one outlet is shut, and forces fluid after baffling, to flow out therein.According to gamma-ray exponential damping law, the thickness of the medium that the gamma-ray intensity of transmission is passed with it is relevant.What with γ sensor, directly measure is the Thickness Ratio of each phase medium in the approach of walking at it, and what directly measure is " linear phase fraction ".Under the mixed uniformly prerequisite of three-phase medium, can be by linear phase fraction in conjunction with pipeline cross section geometric coaptation area phase fraction.And in actual total flow is measured, we process three-phase mutually as one, this just needs us to suppose each alternate phase velocity poor (not having slippage) that do not exist, and the gas phase in three-phase flow has identical flowing velocity with liquid phase in any one cross-section.Under the violent condition of mixing of liquid phase, it has been generally acknowledged that this prerequisite without slippage sets up.Under the prerequisite of " without slippage ", on cross-section of pipeline, the shared area of gas phase just equals void fraction with the ratio (phase area ratio) that cross-section of pipeline amasss.Similarly, when the water in liquid phase has identical flowing velocity with oil in certain, on the cross-section of pipeline at this place, the shared area of water just equals water percentage with the ratio (phase area ratio) of liquid phase area occupied, and thinks that area phase fraction is exactly volume phase fraction.In this utility model, if do not particularly not pointed out, based on " evenly mix " and " without slippage " these two prerequisites, think and measured the linear phase fraction of a certain each phase of section, the geometric parameter based on pipeline section, just can calculate area phase fraction and the volume phase fraction of this section.
" void fraction " (GVF) is defined as: the ratio of (under operating mode) volumetric flow of gas and polyphasic flow total volumetric flow rate under the condition of environment temperature and pressure.Conventionally with percentage, represent.Under the prerequisite of " evenly mixing " and " without slippage ", void fraction is exactly the gas phase area phase fraction in cross section.
" water percentage " (WC) is defined as: (under mark condition) volumetric flow rate of water and the ratio of liquid volume flow under the condition of standard temperature and pressure (STP).Conventionally with percentage, represent.Under the prerequisite of " evenly mixing " and " without slippage ", water percentage is exactly the water area phase fraction in cross section.
The utility model relates in a kind of on-line measurement polyphasic flow the Oil, Water, Gas three-phase integrated apparatus of flow separately, below its included member is described in detail.
Differential pressure type flowmeter: Venturi tube is a kind of throttle-type flow sensor of developing according to Venturi effect, is a kind of standard restriction device.Conventionally, differential pressure type flowmeter is comprised of entrance pipeline section, circular cone contraction section, cylinder throat, circular cone diffuser, in Venturi tube, be also provided with for measuring the measuring sensor of temperature and porch and throat's place's pressure reduction, these are all the standard fittings of Venturi tube, repeat no more.Venturi tube is divided into standard Venturi tube and general Venturi tube by structure, all can be used in the utility model.Preferred selection standard Venturi tube structure in the utility model.About detailed structure and the processing specification of Venturi tube, can, referring to CNS GB-T2624, repeat no more herein.The utility model, when work, preferably makes this differential pressure type flowmeter vertically place.
Dual intensity gal ray phase fraction instrument in device of the present utility model is mainly comprised of dual intensity gamma ray generator and gamma receiver.Dual intensity gamma generator is to utilize a dual intensity beam,gamma-ray (wherein comprising two kinds of different γ photons of energy) through measured medium, when this gamma rays passes absorbing medium, can because of with the interaction such as absorbing medium generation photoelectric effect, Compton scattering and electron pair generation, and there is strength retrogression, then by dual intensity gamma receiver, measured respectively the intensity in transmission of the photon of two kinds of energy.One, two groups of γ photon energies are different, and therefore can list two independently absorbs equation, and the situation of the γ medium that photon pass of its two, two kinds of energy is identical, so measured in two absorption equations is same medium.Can absorb equations simultaneousness two thus and solve two unknown numbers: water percentage and void fraction.
The structure in dual intensity gal ray phase fraction Yi Yuan storehouse need to be carried out respective design according to choosing of radioactive source.The storehouse, source that conventional feasible scheme is dual gamma source is by two
241the composite structure that Am source forms or select
133single the radioactive source structure of Ba.For example, using
241in the situation of Am radioactive source, produce the gamma rays of 59.5keV, make one in this gamma rays as high energy gamma rays directly through absorbing medium, and thereby the target that another burst of bombardment in this gamma rays made by silver excites silver hair to go out the low energy gamma rays that energy is 22keV, and along the path identical with aforementioned high energy gamma rays, pass through this absorbing medium, and by gamma ray detector, detected their intensity in transmission together; Can also otherwise obtain dual intensity gamma rays, for example, use
133ba, the gamma rays that this radioactive source sends has three main energy levels, is respectively 31keV, 81keV, 356keV, chooses the combination of any two kinds wherein, for example adopt the array mode of 31keV+81keV, respectively as described high energy gamma rays and low energy gamma rays.Use dual intensity gamma rays, the information more forming about heterogeneous fluid inside can be provided.In the selection of dual energy gamma ray detector, those skilled in the art can select concrete two kinds of energy that use according to the specific nature of object to be measured.For example, measure dense medium and need to select the gamma-rays that energy is higher.To light substance, as oil water mixture, two most suitable scopes of energy roughly at 20KeV between 100KeV.Conventionally energy in the gamma-rays of two kinds of energy higher call energetic gamma rays, another is low-energyγ-ray.The gamma ray detectors of using in the utility model is dual intensity gamma-ray detector, and it is known, about its more principle of work and device specifics, and can be referring to relevant monograph.Repeat no more herein.
In brief, dual intensity gamma ray phase fraction instrument is a kind of method of information of each phase composition with noncontact, non-invasive mode measuring tube inner fluid.In device of the present utility model, dual intensity gamma-ray burster and gamma rays receiver will be radial arrangement along the xsect of vertical pipe, in the utility model, in order to distinguish, by being arranged in the dual intensity gamma ray phase fraction instrument called after first dual intensity gamma ray phase fraction instrument at porch or the throat place of differential pressure type flowmeter, by vertical section of dual intensity gamma ray phase fraction instrument called after the second dual intensity gamma ray phase fraction instrument located that is arranged in liquid outlet pipeline.
Online fluid sampling device in the utility model device, Main Function is separated by online liquid phase or part is separated, compares with original polyphasic flow, obtains being relatively more rich in the gas phase and the relative liquid phase that is more rich in liquid of gas.The online fluid sampling device of this product type is positioned at the downstream of described differential pressure type flowmeter.As previously mentioned, if liquid holdup is too low in polyphasic flow, the water percentage time error in measuring liquid phase can be larger.By carrying out online gas-liquid separation, can carry out measurement of water ratio to the described liquid phase that is relatively more rich in liquid, improve measuring precision of water content in water.It generally comprises described device: inlet duct (4-1), eddy flow chamber (4-2), collision chamber (4-4), gas vent pipeline (4-5) and liquid outlet pipeline (4-3), wherein said inlet duct one end is communicated with described Venturi tube, the other end is and is tangentially communicated to described eddy flow chamber, top, described eddy flow chamber arranges collision chamber, at least one deck screen cloth is set in this collision chamber, described gas vent pipeline is positioned at collision top of chamber, described liquid outlet pipeline is positioned at bottom, eddy flow chamber, and be bent upwards after leaving eddy flow chamber, the liquid outlet pipeline that formation comprises one section of vertical pipeline, as depicted in figs. 1 and 2.The mode of online gas-liquid separation can have a variety of, and what the utility model adopted is the mode of " cyclonic separation+collision is separated ".Described inlet duct and horizontal sextant angle can change between 0 to 90 degree, are optimization device height and convenient connection, and preferred levels is installed.Described eddy flow chamber, can be column type or conical eddy flow chamber, be preferably column type eddy flow chamber, for guaranteeing that fluid fully forms more stable fluidised form after eddy flow in eddy flow chamber, make liquid outlet pipeline place gas content low as far as possible, the diameter in eddy flow chamber is generally the more than 6 times of inlet duct diameter, and the height in eddy flow chamber is the more than 2 times of inlet duct diameter.The sample tap of described liquid outlet pipeline in eddy flow chamber, is positioned at bottom, eddy flow chamber and presses close to chamber, eddy flow chamber wall, and preferably relative with inlet duct, and now, it is liquid that stable eddy flow fluidised form makes this place's major part.Described liquid outlet pipeline, after leaving eddy flow chamber, crooked upwards forms one section of vertical pipeline, and then passes into described gas-liquid and heavily converge in pipeline.During work, this vertical pipeline place can form the fluid column of certain altitude, can give sample tap certain pressure, make gas more difficult from sampling discharge line leave.In described collision chamber, there is at least one deck screen cloth, to guarantee that fluid can not streamlined flow, must be through repeatedly baffling collision, during each baffling collision, fluid-mixing Speed Reduction is 0, less drop condensable is larger drop, be affected by gravity and eddy flow chamber is got back in sedimentation, and gas can more successfully continue to proceed to gas vent pipeline and discharges.Described gas vent pipeline, diameter should be not less than inlet duct, and gas can be discharged smoothly.
The second dual intensity gamma ray phase fraction instrument is set, to measure the water percentage of fluid sample herein at vertical pipeline place.The pipeline of vertically arranging contributes to eliminate the impact of profit layering, improves accuracy of measurement.
The size of each member of device of the present utility model and arrangement relation each other, it is mainly inlet angle, structure and the size in collision chamber, can be used fluid calculation software to calculate rear optimization for the particular range of oil well flow, or according to carrying out optimal design after limited number of time experiment.
The gas phase and the liquid phase that by described online fluid sampling device, are divided into, finally heavily converge pipeline place in the gas-liquid in device of the present utility model downstream and converge outflow, continues to carry.Therefore, device of the present utility model does not cause and disturbs and impact the conveying of the polyphasic flow that comprises oil field oil, gas, water three-phase.
Data acquisition processing system of the present utility model can, according to convenient, compact principle, be arranged on any correct position place of device of the present utility model.Its effect is the data-signal that gathers the instruments such as each temperature sensor, pressure transducer, differential pressure pickup, the first and second dual intensity gamma rays phase fraction instrument, and utilize built-in process chip that data are calculated and processed, according to client's needs, provide final metering result.
Between each member of the present utility model, adopt flangeless conjunction mode, after each member machines, carry out integrated assembling, between each member by welding or the technique such as casting realizes the integral structure of this utility model device Highgrade integration.
The course of work of device of the present utility model is as follows, referring to Fig. 3:
1) polyphasic flow that comprises oil, gas, water flows into blind threeway from horizontal direction, by blind threeway, fluid is fully mixed and the flow direction of polyphasic flow is become to vertical direction from level.
2) polyphasic flow that comprises oil, gas, water flows in the differential pressure type flowmeter of vertically installing, and utilizes differential pressure type flowmeter to measure oil, gas, water three-phase total volumetric flow rate Q
v;
3) the void fraction GVF and the first water percentage WC1 that utilize described the first dual intensity gamma rays phase fraction instrument to measure oil, gas, water three-phase at porch or the throat place of Venturi tube simultaneously;
4) polyphasic flow that comprises oil, gas, water that flows out described differential pressure type flowmeter continues to flow into the online fluid sampling device in Venturi tube downstream, by this, install described oil, gas, water three-phase and carry out gas-liquid separation, separated gas is from the gas vent pipeline on this device top, liquid flows out from bottom, the eddy flow storehouse sidewall of this device, then through the pipeline making progress completely, flows into one section of vertical pipeline;
5) utilize the second dual intensity gamma ray phase fraction instrument that is arranged on this vertical pipeline place to measure the second water percentage WC2 in liquid phase;
6) last, gas phase and liquid phase are heavily converged pipeline place in gas-liquid and are converged outflow, continue to carry.
7) signal of all member collections or data all transfer to and in data acquisition system (DAS), carry out data processing and calculating, and stores it, and automatically realize containing water gaging preference policy, when described oil, gas, when water three-phase GVF surpasses predetermined threshold X, the water-retention value WC2 that the final moisture measurement result of equipment adopts the second dual intensity gamma ray phase fraction instrument to measure, otherwise the moisture measurement result WC1 of the first dual intensity gamma ray phase fraction instrument at employing venturi place is as output valve, to guarantee at described oil, gas, water three-phase void fraction gamut includes water gaging result and still keeps predetermined measuring accuracy, be not subject to void fraction, the impacts such as liquid measure, this moisture measurement strategies has solved moisture measuring accuracy and has been measured void fraction and affect and sample representation problem, fundamentally having realized moisture gamut accurately measures.
8) utilize the resulting total flow of above-mentioned flow process, void fraction, water percentage (WC) to calculate the volumetric flow rate of described oil, gas, each phase of water, and utilize oil well pressure, the temperature information that multivariable transmitter (MVT) gathers, in conjunction with PVT model, oil, gas, water condition flow are converted to mark condition amount as final Output rusults.
As can be seen here, device of the present utility model is by optimizing the structural design of each member, and by flangeless conjunction, each member is organically combined together, structure is very compact, realized the Highgrade integration of each member, integrated, from solved current multi-phase flowmeter structure at all, disperse, the problem that cost is high, from measurement performance by the moisture measurement module of exclusive sampling with containing water gaging preference policy, realized moisture accurate measurement in GVF gamut, the measurement range of multi-phase flowmeter and adaptability have widely greatly been improved, its miniaturization, integral structure meets current international market to multi-phase flowmeter demand cheaply, truly realized comprising oil, gas, the multiphase flow rates metering device gamut scope integral structure of water, and have reliable, safeguard the features such as simple.
Claims (7)
1. an Oil, Water, Gas three-phase integrated apparatus for flow separately in on-line measurement polyphasic flow, it comprises with lower member:
Differential pressure type flowmeter (3), it is vertically placed;
Be arranged in the first dual intensity gamma ray phase fraction instrument (2) at porch or the throat place of described differential pressure type flowmeter (3), it comprises dual intensity gamma ray generator and gamma detector, the arrangement of the two makes the gamma rays that described dual intensity gamma rays generator sends can radially pass the porch of described differential pressure type flowmeter or the cross-section of pipeline that throat locates, and reaches described gamma ray detector;
Online fluid sampling device (4), it is arranged in the downstream of described Venturi meter, and it comprises: inlet duct (4-1), eddy flow chamber (4-2), collision chamber (4-4), gas vent pipeline (4-5) and liquid outlet pipeline (4-3), wherein said inlet duct one end is communicated with described Venturi tube, the other end is and is tangentially communicated to described eddy flow chamber, top, described eddy flow chamber arranges collision chamber, at least one deck screen cloth is set in this collision chamber, described gas vent pipeline is positioned at collision top of chamber, described liquid outlet pipeline is positioned on the sidewall of bottom, eddy flow chamber, and be bent upwards after leaving eddy flow chamber, the liquid outlet pipeline that formation comprises one section of vertical pipeline,
Be arranged in the second dual intensity gamma ray phase fraction instrument (5) at described vertical pipeline place, it comprises dual intensity gamma ray generator and gamma detector, the arrangement of the two makes the gamma rays that described dual intensity gamma rays generator sends radially to pass described vertical pipeline xsect, reaches described gamma ray detector;
Data acquisition processing system (6);
Gas-liquid is heavily converged pipeline (7), and the gas in the liquid in described liquid outlet pipeline and described gas vent pipeline converges again at this, then flows out described integrated apparatus;
Wherein, described differential pressure type flowmeter (3), described online fluid sampling device (4) and described gas-liquid are heavily converged pipeline (7) and are made into integral structure.
2. according to the device of claim 1, it also comprises the device for fluid is mixed that is positioned at described differential pressure type flowmeter (3) upstream.
3. according to the device of claim 1, the axis in wherein said eddy flow chamber (4-2) vertically arranges.
4. according to the device of claim 1, described dual intensity gamma ray detectors is used
241am or
133ba, as gamma ray radiation source, is wherein being used
241in the situation of Am radioactive source, produce the gamma rays of 59.5keV, wherein first strand of gamma rays directly absorbed through absorbing medium, thereby another strand bombards the target sheet of being made by silver excites silver hair to go out the relatively low gamma rays of energy that energy is 22keV, and be absorbed by this absorbing medium along the path identical with first strand of gamma rays, and by gamma ray detector, detected their intensity in transmission together; And using
133in the situation of Ba as radioactive source,
133the gamma rays that Ba sends has three main energy levels, is respectively 31keV, 81keV, and 356keV, chooses the combination of any two kinds wherein, respectively as described dual intensity gamma rays.
5. according to the device of claim 1, wherein said inlet duct (4-1) and horizontal angle are between 0 to 90 degree.
6. according to the device of claim 2, wherein said is blind threeway (1) for making the device that fluid mixes.
7. according to the device of claim 1, the connection that wherein said differential pressure type flowmeter (3), described online fluid sampling device (4) and described gas-liquid are heavily converged between pipeline (7) adopts non-flanged connected mode.
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| CN111141346B (en) * | 2019-12-30 | 2021-04-23 | 上海理工大学 | Measuring method of oil-water two-phase flow measuring device based on incomplete phase separation |
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