Multiphase flowmeter with throat extension type Venturi tube and microwave resonator combined

Abstract

Embodiments of the present disclosure are directed to providing advanced multiphase flow meters utilizing advanced sensor configurations and data analysis. In an embodiment, a system is provided and configured with a dielectric constant sensor configured around a throat section of a throat extension venturi enclosure. In a particular embodiment, a dielectric constant sensor in the system is configured with a computer system or a microcomputer system, which may be configured with a computer circuit board including a processor, memory, networking capabilities, and software.

Description

[0001] This application is a divisional application of the patent application with the application number 202080031050X, the application date of March 4, 2020, and the invention title of "Multiphase Flowmeter Combining Extended Throat Venturi Tube and Microwave Resonator". Technical Field

[0002] Embodiments of the present disclosure relate to multiphase flowmeters that utilize sensors and sensor data analysis to interpret complex flows. Background Art

[0003] Multiphase flowmeters have been constructed with multiple sensors to collect data on complex flows that typically consist of oil, water, and gas. The flowmeter can also be constructed with a computer system or a microcomputer system to record and interpret the sensor data using mathematical algorithms. The sensors can also be used to detect and measure data regarding solids. The sensors can be combined and configured to be incorporated with a Venturi flow channel to enable the measurement of mass flow, and can also be constructed with methods for estimating the fluid fraction. For systems that can perform fluid fraction estimation, multiple measurement sensors and techniques can be constructed as part of the system. These sensors and techniques can include the following sensors and sources, for example, radioactive sensors and sources, X-ray sensors and sources, infrared sensors and sources, resistivity sensors and sources, capacitance sensors and sources, and acoustic sensors and sources. Systems constructed with these techniques have several known problems that are desired to be solved or minimized, and certain methods and systems may not be able to operate safely, may be inaccurate, or may not be able to perform under certain conditions.

[0004] Existing systems constructed with an extended throat Venturi tube recognize that when the void fraction increases to 90% - 95% or greater, a stable mixture of oil, water, and gas cannot be formed. The extended throat Venturi tube construction has a longer throat section than the standard Venturi tube construction, but is otherwise similar to the standard Venturi tube construction. The void fraction is the fraction (content) of gas in the liquid. For example, a void fraction of 90% means that 90% of the total volume of the pipeline is occupied by the gas phase, while the remaining 10% is occupied by the liquid phase. When the void fraction is 90% - 95% or greater, the interaction between the gas and the liquid becomes a complex phenomenon that cannot be accurately measured. Due to the irreversible work done by the gas phase in accelerating the liquid phase, the gas phase may experience additional pressure drops. These pressure drops in the converging section of the Venturi tube can lead to an overestimation (resulting in measurement errors) in measuring the gas flow rate. Summary of the Invention

[0005] Embodiments of the present disclosure aim to provide advanced multiphase flowmeters that utilize advanced sensor construction and data analysis.

[0006] It is desirable to provide a system that combines dielectric constant-based water cut measurement and mass flow measurement using a throat-extended Venturi tube. Embodiments of such a system are described in the following paragraphs, and the constructed multiphase flowmeter can produce accurate water cut measurements over the full range (0%-100%).

[0007] According to an embodiment, a system is provided and the system is constructed with a dielectric constant sensor that is constructed around the throat section of a throat-extended Venturi tube housing. In a particular embodiment, the dielectric constant sensor in the system is constructed with a computer system or a microcomputer system. The computer system or the microcomputer system can also be constructed with a computer circuit board including a processor, a memory, networking capabilities, and software (collectively referred to as the computer or the microcomputer system). The software can include an operating system and a communication interface program. In an embodiment, the constructed dielectric constant sensor can include a microwave resonator. The microwave resonator can be configured to communicate with the computer system. In an embodiment, the computer system can be configured to be located near the sensor, or in an alternative embodiment, the computer can be constructed at a remote location. In an embodiment, the computer system can be configured to control the microwave resonator and also receive sensor measurement data from the resonator. The computer system can be programmed to interpret, process, and analyze the sensor measurement data. In an embodiment, the system can also be configured to calculate and provide water cut analysis, flow rate information, and other information for recording purposes to another computer system or an end user. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The foregoing aspects, features, and advantages of the embodiments of the present disclosure will be further understood when considered in conjunction with the following description of the embodiments and the drawings. For clarity, specific terms will be used in the description of the embodiments of the present disclosure shown in the drawings. However, the present disclosure is not intended to be limited to the specific terms used, and it should be understood that each specific term includes equivalents that operate in a similar manner to achieve a similar purpose.

[0009] Figure 1 A side perspective view of an exemplary multiphase flowmeter system is shown that combines a throat-extended Venturi tube with a microwave resonator constructed in one possible arrangement and configuration.

[0010] Figure 2 A side cross-sectional view of an exemplary multiphase flowmeter system is shown that combines a throat-extended Venturi tube with a microwave resonator constructed in one possible arrangement and configuration.

[0011] Figure 3Shows a side perspective view of an exemplary multiphase flowmeter system that combines a throat extended Venturi tube with a microwave resonator configured in a possible arrangement and construction and including mutually orthogonal resonators.

[0012] Figure 4 Shows a side cross-sectional perspective view of an exemplary multiphase flowmeter system that combines a throat extended Venturi tube configured in a possible arrangement and construction and includes a single helix-based resonant sensor.

[0013] Figure 5 Shows with respect to Figure 4 one possible result of the simulation results of the resonator in response to different water cut rates from 0% to 100% for the system and construction shown and described.

[0014] Figure 6 Shows a side perspective view of an exemplary multiphase flowmeter system that combines a throat extended Venturi tube with a microwave resonator configured in a possible arrangement and construction. Detailed Description

[0015] Advantages and features of the present disclosure, and methods of achieving the advantages and features of the present disclosure, will be apparent by reference to the embodiments described in detail below in conjunction with the accompanying drawings. The disclosed embodiments and configurations are not limited to the embodiments disclosed below and may be implemented in various different forms. The embodiments are provided only to complete the present disclosure and fully disclose the scope of the present disclosure to those skilled in the art.

[0016] For simplicity and clarity of illustration, the drawings show a general construction manner, and descriptions and details of well-known features and techniques may be omitted to avoid unnecessary obscurity of the discussion of the embodiments. Additionally, the elements in the drawings are not necessarily drawn to scale. For example, the dimensions of some elements in the figures may be enlarged relative to other elements to facilitate an improved understanding of the various exemplary embodiments.

[0017] Various embodiments will be described in detail with reference to the drawings.

[0018] Embodiments of the present disclosure are intended to provide advanced multiphase flowmeter systems that utilize advanced sensor configurations and data analysis. According to an embodiment and as shown with reference to Figure 1 shown, a throat extended Venturi tube multiphase flowmeter system 10 is shown. Figure 1 Shows an exemplary layout of a specific system 10 having a Venturi tube converging section 20, a throat extended section 30, a Venturi tube throat housing 32, a Venturi tube diverging section 40, and a pair of microwave resonant sensors 50a and 50b (labeled as sensor 1 and sensor 2, respectively, in Figure 1 ). In Figure 1In the illustrated embodiment, the converging section 20 of the Venturi tube includes a converging conical tapered section 22 connected to the throat extension section 30. In addition, the diverging section 40 of the Venturi tube further includes a diverging conical tapered section 42 extending from the throat extension section 30. In an embodiment, the cone angles of each of the converging conical tapered section 22 and the diverging conical tapered section 42 can be the same or different. In an embodiment, such as Figure 1 shown, the conical tapered section 22 can be constructed in accordance with International Organization for Standardization (or simply "ISO") standard 5167-4. In an alternative embodiment, these angles can be varied. For example, these angles can be increased to reduce the overall length of a flowmeter of a given construction such that the fluid flow through the flowmeter can have a generally smooth and non-turbulent flow. For a particular system, each of these features can be constructed or organized differently. Thus, since each system can have a unique layout and construction, Figure 1 the layout should be regarded as only an example.

[0019] Referring to Figure 1 , in an embodiment, the throat extended Venturi multiphase flowmeter system 10 utilizes the throat extension section 30 as a section for constructing the pipe-conforming microwave resonant sensors 50a and 50b. The time-based responses of these two sensors are analyzed to estimate the water-cut of the fluid passing through the pipe section. In an embodiment, in order to extract the water-cut measurement, the resonant sensors 50a and 50b are activated by microwave signals, and then the responses of these two resonant sensors are recorded. This obtains a typical plurality of time-based S-parameter measurements of the microwave resonator, and these S-parameter measurements are similar to the measurements shown on the S Figure 5 ( Figure 5 described in more detail in the following paragraphs) axis of the graph shown. Then, the dip point (minimum amplitude) can be extracted from the curve established by the recorded sensor measurements, and the corresponding frequency at this minimum (or simply "min") point is determined as the resonant frequency (f 21 ) of the sensor. The determined f Figure 5 for each of the two sensors is averaged to obtain an average f o that depends only on the water content in the oil and is independent of the flow regime / mode inside the pipe. o These measurements can be accomplished using a vector network analyzer ("VNA") or a microwave oscillator. o Figure 6An exemplary embodiment using a VNA is shown and described. The process is repeated every 100 milliseconds (or simply "msec") so that the dynamics of fluid flow changes can be captured. This ability to perform time-based measurements every 100 msec also allows determination of the water cut (water content) in the presence of three phases (oil, water, and gas), and also allows prediction of the flow pattern of the fluid through the pipeline. Additionally, the time-based responses of the two sensors can also be correlated to extract the flow rate, or can be used to estimate the void fraction. The void fraction is the fraction of gas in the liquid. In an embodiment, there is a certain known distance between the two resonators. This allows the time-based responses (f o ) of the two resonators to be correlated, and the maximum correlation value is related to the delay between the responses of the two resonators. Then, the known distance between the resonators is divided by the time delay to give the fluid flow rate.

[0020] The converging section of the venturi tube is configured to measure the pressure difference, so that the flow rate of the mixture can be determined. Additionally, more pressure points can be tapped on the throat extension for measurement to allow extraction of the flow rate of the gas phase in addition to the liquid phase. This provides another method of measuring the flow rate in addition to the related methods described above. In an embodiment, the related method, the differential pressure method, or both can be configured to measure the flow rate according to the desired configuration of a particular system.

[0021] Generally, a throat extended venturi tube system such as those described can be constructed according to the following calculations and metrics. For example, when microwave resonators are constructed at the throat of the throat extended venturi tube, the venturi tube measures the mass flow according to the following equation:

[0022] Where:

[0023]

[0024] As another example, if the fluid density is known, the following equation can be used to determine the volumetric flow rate:

[0025] Where:

[0026]

[0027] In an example, the phase fraction can then be determined by the following equation:

[0028] Where:

[0029]

[0030] In an embodiment, a microwave resonator in a particular system can be configured to be more sensitive to the water content in a fluid than previous systems. The water content and oil fraction (α w and α o ) can be determined based on a multiphase flow through a throat extension of a Venturi tube by correlating changes in the resonance frequency. The water density and oil density (ρ w and ρ o ) of a particular reservoir can be determined by sampling. The calculated fractions and densities can be used to obtain the mixture density ρ mix . The volume flow rate can be determined using the above Q equation with ρ mix . Since both oil and water are incompressible fluids under normal field conditions, the individual volume flow rates and mass flow rates can be obtained by multiplying the total flow rate by the individual fractions (α w and α o ).

[0031] In a particular embodiment such as Figure 2 shown, a side cross-sectional view of an exemplary multiphase flowmeter system 110 combining a throat extension type Venturi tube and a microwave resonator is shown. Figure 2 An exemplary layout of a particular system 110 having a Venturi tube converging section 120, a throat extension section 130, and a Venturi tube diverging section 140 is shown. In an embodiment, a pair of microwave resonant sensors 150a and 150b can also be configured to surround or be near the throat extension section 130. In an embodiment, an external metal housing 132 can form a housing around the throat extension section 130. In Figure 2 the embodiment shown, the Venturi tube converging section 120 includes a converging conical taper section 122 connected to the throat extension section 130. Additionally, the Venturi tube diverging section 140 includes a diverging conical flare section 142 extending from the throat extension section 130. In the embodiment regarding Figure 2 shown, the internal structure of the throat extension section is shown to have a polyether ether ketone (or simply "PEEK") tube 134, where a printed water content sensor (shown as component 134a of the PEEK tube) forms at least a part of the PEEK tube 134. Generally, the PEEK tube is a tube based on polyether ether ketone, but other materials including other plastics and polymers having similar inert and non-conductive properties can be used instead if desired. In an embodiment, the edges of the PEEK tube can be machined such that the edges of the PEEK tube can slide into the metal converging and diverging sections of the meter. Typically, the metal converging and diverging sections of the meter into which the PEEK tube can be configured to slide will also be configured to have O-rings to prevent leakage.

[0032] Referring to Figure 3, shows a perspective view of an exemplary throat-extended Venturi multiphase flowmeter system 210 that combines a throat-extended Venturi with dual mutually orthogonal helical microwave resonators configured in a possible arrangement and configuration. Figure 3 Shows an exemplary layout of a particular system 210 having a Venturi converging section 220, a throat extension section 230, and a Venturi diverging section 240. In an embodiment, and as Figure 3 shown in the embodiment shown, an outer housing 232 may form an outer shell around the throat extension section 230. In an embodiment, a pair of dual mutually orthogonal helical microwave resonators 250a and 250b may be configured around the throat extension section 130. As Figure 3 shown, the dual mutually orthogonal helical microwave resonant sensors may be configured to be rotated to have a rotational difference of substantially 90 degrees between the helices of the dual mutually orthogonal helical microwave resonant sensors. In an alternative embodiment, in addition to Figure 3 the two helical orthogonal microwave resonators shown, additional helical orthogonal microwave resonators may be configured. Additionally, in an embodiment and as Figure 3 shown in the exemplary construction of, non-metallic support rods 136 may be configured as part of the system 210 to support semi-precision coaxial RF connector cables ("SMA cables") 262a, 262b, 262c, and 262d extending from a first microwave resonator feeder 252a and a second microwave resonator feeder 252b, respectively. In an embodiment, and as Figure 3 shown in, the SMA cables 262a, 262b, 262c, and 262d may be configured to extend from the feeders 252a and 252b to a bulkhead 260 that receives the SMA cable connections. In an embodiment, a differential pressure transducer 124 may also be configured on the system 210 to make differential pressure measurements. In a particular embodiment and as with respect to Figure 2 shown and described ( Figure 3 not shown in the external housing view of), the Venturi converging section may be configured to include a converging conical taper section connected to the throat extension section, and the Venturi diverging section may be configured to include a diverging conical flare section extending from the throat extension section. With respect to Figure 3 the sensor construction of the embodiment described allows for the measurement of the water cut in an oil-water two-phase flow regardless of the flow regime. In the embodiment shown and described, the helical microwave resonator 250 helps to rotate the electric field ("E-field") inside the PEEK tube 234 of the throat extension section 130 of the Venturi. The rotating electric field allows for the measurement of the fluid or multiphase mixture from all possible orientations over a 360° span, thus allowing the throat-extended Venturi multiphase flowmeter system 210 shown and described to be orientation-insensitive.

[0033] In an embodiment, the electric field of the microwave resonator exists not only inside the PEEK tube but can also fringe outwards. In this case, fringing outwards means that some of the electric field penetrates the air between the PEEK tube and the external metal. However, depending on the desired configuration of the particular component, the system is generally configured such that most of the electric field remains inside the PEEK tube through which the fluid to be measured flows. The presence of any material (especially metal) in the region between the PEEK tube and the external metal cylinder can affect the electric field and resonant operation of the sensor. Therefore, to achieve an optimal and reliable system, it is desirable to minimize the amount of metal material in this space. Additionally, the presence of materials in the region surrounding the sensor can affect the performance of the sensor. With this in mind, in an embodiment, the construction and position of the sensor can be optimized taking into account the housing around the throat extension section. For example, in an embodiment, the distance between the housing and the sensor can be configured to be 1.7 inches, at least for the particular configuration with respect to Figure 3 shown. This distance has been determined to be the optimized separation distance of the metal from the constructed sensor. In an embodiment, this distance can be configured to be proportional to the outer diameter of the PEEK tube, at least for the particular configuration with respect to Figure 3 shown. The outer diameter has been determined to be 2.15 inches. In an embodiment and as shown and described with respect to Figure 3 shown, the outer diameter of the PEEK tube can be configured to be 2.15 inches. In an alternative embodiment, the diameter and length of the PEEK tube can be increased with the separation distance to address any increase in the fringe field based on the new PEEK tube dimensions.

[0034] To determine the optimal construction, a simulation of the resonator along with the complete housing structure is performed in high-frequency simulation software. Since in an embodiment the resonator construction can consist of two mutually orthogonal spiral resonators whose responses closely track each other, only one resonator is used to perform the simulation to facilitate a faster simulation completion time. Similarly, the area of the simulated housing section is restricted to the venturi tube throat, thereby reducing the simulation time. Since sensors of other configurations typically have similar responses and the resonant frequencies of two sensors will be averaged in a particular configuration to achieve high accuracy, the high-frequency simulation software model with only one resonator is substantially accurate.

[0035] Figure 4 The part where the simulation is performed in the high-frequency simulation software model is shown. Figure 4 An enlarged perspective view of an exemplary throat-extension type venturi tube section of the multiphase flowmeter system 310 is shown.

[0036] Figure 4Only a portion of a particular system 310 is shown, and the shown portion is a throat extension 330 of a single orthogonal microwave resonator 350 having only a PEEK tube 334 located at the center. The throat extension 330 also includes a metal outer housing 332.

[0037] Figure 4 The model shown in [reference] simulates different water and oil contents (0% - 100%, in 10% steps) placed inside a 7 millimeter ("mm") thick PEEK tube, which is surrounded by a stainless steel metal housing with an internal dimension (diameter) of 140 mm and an external dimension of 167 mm and made of stainless steel (SS - 316). Figure 5 The resonator response based on the performed simulations is shown.

[0038] Referring to Figure 5 , the graph shown indicates that the sensor can be quite sensitive to changes in the water content in oil. For example, for this embodiment, for the full range of water content changes from 0% to 100% in oil, the resonant frequency changes from 186.1 megahertz ("MHz") to 126.1 MHz, which is an almost 47.6% percentage shift. The percentage frequency shift depends on the ratio of the changing medium to the fixed medium. For a particular configuration, a 47.6% shift is sufficient to achieve the desired water content measurement resolution using a complex readout circuit or a VNA. In an embodiment, an exemplary readout circuit configuration can include a microwave oscillator connected to a pair of sensor resonators. In an embodiment, the oscillator can consist of an unstable transistor and some RLC (resistor / inductor / capacitor) components. In an alternative embodiment, a VNA or vector network analyzer, which can be off - the - shelf test instruments manufactured by various different companies, can be configured. The VNA can be configured in different form factors ranging from bench - top to pocket - sized VNAs. Generally, the VNA has complex microwave circuits inside to perform S - parameter measurements such as Figure 5 the exemplary S - parameter measurements shown in [reference]. Note that other configurations will also provide full - range water content measurements in oil, and a particular system can be configured to match various criteria such as size, dimensions, or materials, as well as other requirements that may be preferred for a particular system function.

[0039] Referring again to Figure 5 , another observation is that for this particular configuration and simulation, the resonator gives a sharp resonant dip (all media below - 30 dB) indicating a high quality factor of the resonator. The high quality factor can help to point the resonance frequency of the sensor tip, thus giving the sensor high resolution and accuracy.

[0040] In such as Figure 3In a particular embodiment as shown, the throat extended Venturi multiphase flowmeter system may be constructed with a computer system to perform analysis of measurement data. Such a computer system may be constructed with a computer circuit board (collectively referred to as a "computer system") including a processor, I / O (input / output) channels, memory, a network interface, and non-volatile memory with software loaded. The software may include an operating system, a communication interface program, and a microwave resonance control and monitoring program. In an alternative embodiment, these programs may be combined or run on a bare system without an operating system.

[0041] Referring Figure 6 , an exemplary multiphase flowmeter system is shown. The system may be similarly constructed to the other embodiments. Figure 6 The example shown is constructed to have a Venturi converging section 620, a dual microwave resonator section 630, and also includes SMA to external VNA connection cables 662a, 662b, 662c, and 662d. A pair of cables are connected internally to each resonator and then to a particular VNA so that S measurements can be determined. As shown, VNA connection cables 662a and 662b are connected to VNA1 682a, and VNA connection cables 662c and 662d are connected to VNA2 682b. In an embodiment, each configured VNA may be connected to an Ethernet switch 686, although other similar communication equipment may be constructed. For example, it may be desirable to configure wireless communication equipment as part of the VNA or other equipment in a particular system. Ethernet switch 686 may also be configured to connect to a wide area network or WAN 688 and a server 684. Alternatively, other computing systems such as a laptop computer or a microcomputer may be configured as part of the system in place of the server, or multiple computing devices may be configured. Additionally, in an embodiment and as Figure 6 shown, a differential pressure transducer 624 and a temperature transducer 644 may be configured. A pressure / temperature sensor box or PTSB 680 may also be constructed to transmit measurements from the differential pressure sensor 624 and the temperature transducer 644 to the switch 686 via Ethernet. These measurements may then be transmitted to a configured computing system such as server 684 or undergo additional processing, recording, or display to an end user via the wide area network or WAN 688.

[0042] In addition to the structures and systems described, software can be configured on a server, laptop computer, or other similar computing system such as an Arduino, and the software can interpret sensor data from any configured VNA device and PTSB device via Ethernet or other configurable communication interfaces. The sensor data can be processed and parameters of interest can be displayed on a display terminal. Alternatively, the data can be stored or recorded for later use. For example, the data can be transmitted and stored in the cloud or other systems that will allow remote use and viewing of the data. The data can also be displayed to the end user in graphical form such that moisture content and flow rate information can be observed, or the data can be averaged over a specific time period. Various display options can be configured based on the desired content of a particular system.

[0043] Based on the description provided above, many different embodiments can be envisioned, including embodiments that include software, that can be combined with general-purpose hardware. Various components can be utilized to create a computer system to execute the methods of the various embodiments, and the computer system includes a non-transitory computer-readable medium that can contain instructions of a software program that implements the methods of the embodiments.

[0044] The foregoing disclosure is intended to illustrate the various embodiments described. Once the present disclosure is considered as a whole, various variations will become apparent to those skilled in the art.

Claims

1. A throat-extended Venturi multiphase flowmeter system, characterized in that the system comprises: A Venturi converging section (20, 120, 220, 620); An extended Venturi throat section (30, 130, 230, 630), which is connected to the Venturi converging section, and the system further comprises: An external metal housing (32, 132, 232, 332), A polymer tube (134, 234, 334), which is located at the center inside the external metal housing, Dual microwave resonance sensors (50a, 50b, 150a, 150b, 250a, 250b), which are orthogonal and helical to each other, and are constructed inside the external metal housing and located on the polymer tube so as to be able to measure the multiphase flow in the polymer tube, and A Venturi diverging section (40, 140, 240), which is connected to the extended Venturi throat section; The throat-extended Venturi multiphase flowmeter system further comprises a computer system, which is configured to communicate with the dual microwave resonance sensors of the extended Venturi throat section, and the computer system further comprises: A computer circuit board, A microprocessor, which is constructed on the computer circuit board, and the microprocessor is constructed with input / output channels, A memory, which is configured to communicate with the microprocessor, A data bus, which extends between the memory and the microprocessor, and A network interface, which is configured to communicate with the microprocessor, A non-volatile memory, which is configured to communicate with the microprocessor, and a software program, which is stored on the non-volatile memory, enabling the microprocessor to collect and process the sensor measurement data.

2. The throat extended Venturi multiphase flowmeter system according to claim 1, wherein, The mutually orthogonal microwave resonance sensors (50a, 50b, 150a, 150b, 250a, 250b) are configured to collect measurement data and transmit the measurement data to the computer system.

3. The throat-extended Venturi multiphase flowmeter system according to claim 1 or claim 2, wherein, The computer system has a stored simulation dataset, which allows the association of microwave resonance sensor readings with moisture content values in the range of 0 - 100%, and wherein the software program of the computer system is configured to correlate specific resonance sensor measurement values with percentage values of specific moisture contents.

4. The throat extended Venturi multiphase flowmeter system according to any one of claims 1 to 3, wherein, The computer system software program is further configured to collect microwave resonance sensor measurement values within a given time period, so as to be able to average the microwave resonance sensor measurement values and determine a 0 - 100% moisture content value lookup for the average value, thereby reducing the processing overhead for related table lookups based on the computer system.

5. The throat extended Venturi multiphase flowmeter system according to any one of claims 1 to 4, wherein, The dual microwave resonance sensors (50a, 50b, 150a, 150b, 250a, 250b) of the extended Venturi throat section (30, 130, 230, 630) are also constructed with feed lines attached to each resonance sensor to transmit the resonance sensor measurement values.

6. The throat-extended Venturi multiphase flowmeter system according to any one of claims 1 to 5, wherein The dual mutually orthogonal spiral microwave resonant sensors (50a, 50b, 150a, 150b, 250a, 250b) are rotated to have a rotational difference of substantially 90 degrees between the spirals of the dual mutually orthogonal spiral microwave resonant sensors.

7. The throat-extended Venturi multiphase flowmeter system according to any one of claims 1 to 6, wherein, The Venturi converging section (20, 120, 220, 620) is further constructed with a differential pressure transducer.

8. The throat extended Venturi multiphase flowmeter system according to any one of claims 1 to 7, wherein The Venturi diverging section (40, 140, 240) is further constructed with a temperature transducer.

9. A method for analyzing sensor data using a throat extended Venturi multiphase flowmeter system, the method being characterized by the following steps: Deploy the throat extended Venturi multiphase flowmeter system according to any of the preceding claims at a well site; Collect and record the microwave resonant sensor measurements by the computer, system for processing and analysis.

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