CN119413242B - Particle energy type high frequency online three-phase flow measurement method - Google Patents
Particle energy type high frequency online three-phase flow measurement method Download PDFInfo
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- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
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Abstract
The invention relates to the technical field of flow measurement, in particular to a particle energy type high-frequency online three-phase flow metering method, which comprises the steps of obtaining three-phase flow information, a microwave signal intensity curve and environmental information parameters of a plurality of fluid samples, determining a disturbed type, fitting a sample curve, determining a disturbed characteristic fluid sample, obtaining a microwave signal intensity curve of a fluid to be measured by utilizing microwave irradiation, the method comprises the steps of preliminarily determining and judging whether three-phase flow information of fluid to be measured is accurate, determining whether to calibrate and compensate microwave irradiation, selecting output information based on comparison conditions of the three-phase flow information, or giving out abnormal early warning to a metering environment, and further realizing rapid abnormal risk identification according to specific environmental conditions of mixed fluid, adaptively optimizing a measurement mode and improving detection accuracy of the three-phase flow information.
Description
Technical Field
The invention relates to the technical field of flow measurement, in particular to a particle energy type high-frequency online three-phase flow metering method.
Background
Along with the continuous increase of global energy demands, the exploitation and utilization scale of resources such as petroleum, natural gas and the like are continuously expanded, the change of oil, gas and water yields is mastered in real time, the knowledge of reservoir changes is crucial for optimizing production parameters, the demands on three-phase flow metering technology are correspondingly increased, especially in complex exploitation environments such as offshore oil and gas fields, unconventional oil and gas fields and the like, the requirements on the precision and reliability of three-phase flow metering are correspondingly improved, although the real-time online metering can be realized in some metering technologies at present, certain lifting space exists in the aspects of measuring precision, stability, application range and the like, and a sensor may be interfered in the complex three-phase flow environment to influence the accuracy of a measuring result, so that the improvement of the measuring precision and stability of the three-phase flow is a technical problem to be solved urgently at present.
For example, chinese patent grant publication No. CN113389540B, the invention discloses a multiphase flow fluid measurement system, which comprises a flowmeter module, a water content module and a data acquisition processing module, wherein the flowmeter module is connected with the water content module, the flowmeter module is connected with the data acquisition processing module, the water content module is connected with the data acquisition processing module, the flowmeter module is used for measuring the virtual high flow of fluid, the water content module is used for measuring the phase content of water, and the data acquisition processing module is used for calculating each phase flow after data acquisition. The sensor is in modularized design, so that the position of the sensor can be conveniently adjusted according to different metering demands, and a quick, stable and reliable metering detection result can be provided for oil and gas wells under different working conditions.
The following problems also exist in the prior art:
in the prior art, the three-phase flow measurement result is influenced by the measurement environment difference in the actual measurement process, the abnormal risk identification cannot be rapidly carried out according to the specific environment condition of the mixed fluid, the measurement mode cannot be adaptively optimized, and the detection precision of the three-phase flow information is influenced.
Disclosure of Invention
Therefore, the invention provides a particle energy type high-frequency online three-phase flow metering method, which is used for solving the problems that the prior art cannot quickly identify abnormal risks according to the specific environmental conditions of mixed fluid, cannot adaptively optimize a measurement mode and affects the detection accuracy of three-phase flow information.
In order to achieve the above object, the present invention provides a particle energy type high frequency on-line three-phase flow metering method, comprising:
Acquiring three-phase flow information of a plurality of fluid samples and a microwave signal intensity curve of each fluid sample according to a preset time interval, and determining the interfered category of the fluid samples based on environmental information parameters of each fluid sample;
Wherein the environmental information parameters include pipeline noise parameters and pipeline vibration parameters;
Fitting a plurality of microwave signal intensity curves of the same interfered category with the same three-phase flow information into sample curves and storing the sample curves into a sample library, and determining whether the current fluid sample is an interfered characteristic fluid sample according to the difference condition of the sample curves of different interfered categories;
Acquiring a microwave signal intensity curve of the fluid to be measured by utilizing a microwave irradiation mode, preliminarily determining three-phase flow information of the fluid to be measured according to the comparison condition of the microwave signal intensity curve and a sample curve in the sample library, and determining whether the accuracy of preliminary determination of the three-phase flow information is qualified or not based on a fluid sample corresponding to the three-phase flow information;
in response to the failure of the accuracy of the preliminary determination of the three-phase flow information, obtaining environmental information parameters of the fluid under test to determine whether to calibrate and compensate for the microwave irradiation, including,
Determining a compensation mode and a calibration compensation amount for calibrating and compensating the microwave irradiation, comparing an acquired microwave signal intensity curve with a sample curve in the sample library after completing the calibration and compensation to acquire corresponding three-phase flow information, and selecting output information based on the comparison condition of the three-phase flow information and the preliminarily determined three-phase flow information;
or, an abnormal early warning is sent to the metering environment.
Further, determining the disturbed class of the fluid sample includes:
If the environmental information parameter of the fluid sample accords with the flow signal stability condition, judging that the interfered type of the fluid sample is a non-dominant signal interference type;
And if the environmental information parameters of the fluid sample do not accord with the flow signal stability condition, judging that the interfered type of the fluid sample is dominant signal interference type.
Further, the flow signal stabilizing condition is that the maximum value of the pipeline noise parameter does not exceed a preset noise threshold value and the maximum value of the pipeline vibration parameter does not exceed a preset vibration threshold value.
Further, determining the interference coefficient based on the difference condition of the sample curves of different interfered categories includes obtaining sample curves of different interfered categories with the same three-phase flow information, and determining the coincidence degree of the sample curves as the interference coefficient of the fluid sample.
Further, determining whether the current fluid sample is a disturbed characteristic fluid sample further comprises:
if the interference coefficient of the current fluid sample meets the normal condition of the fluid sample, not screening the fluid sample;
If the interference coefficient of the current fluid sample does not meet the normal condition of the fluid sample, determining the fluid sample as an interfered characteristic fluid sample;
The normal condition of the fluid sample is that the interference coefficient exceeds a preset interference threshold.
Further, determining the three-phase flow information of the fluid to be measured comprises calculating the coincidence degree of the microwave signal intensity curve of the fluid to be measured and each sample curve, and determining the three-phase flow information of the sample curve corresponding to the maximum value of the coincidence degree as the three-phase flow information of the fluid to be measured.
Further, determining whether the accuracy of the preliminary determination of the three-phase flow information is acceptable includes:
and if the fluid sample corresponding to the three-phase flow information is the fluid sample with the disturbed characteristic, determining that the accuracy of the preliminary judgment of the three-phase flow information is unqualified.
Further, determining whether to calibrate and compensate for the microwave irradiation includes:
acquiring a pipeline noise parameter and a pipeline vibration parameter of the current fluid to be tested;
If the environment information meets the compensation condition, calibrating and compensating the microwave irradiation;
if the environment information does not accord with the compensation condition, an abnormal early warning is sent to the metering environment;
the compensation condition is that the average value of the pipeline noise parameters does not exceed a preset environment noise reference value or the average value of the pipeline vibration parameters does not exceed a preset environment vibration reference value.
Further, the calibration compensation mode of the microwave irradiation is to reduce the frequency of the microwave irradiation, and the calibration compensation amount of the microwave irradiation is in positive correlation with the pipeline noise parameter and in positive correlation with the pipeline vibration parameter.
Further, selecting output information based on the comparison of the three-phase flow information includes:
calculating the coincidence ratio of the microwave signal intensity curve after calibration and compensation and each sample curve, and determining the three-phase flow information of the sample curve corresponding to the maximum value of the coincidence ratio as the three-phase flow information after calibration and compensation;
if the three-phase flow information is the same as the primarily determined three-phase flow information, outputting corresponding three-phase flow information after calibration and compensation are completed;
And if the three-phase flow information is different from the primarily determined three-phase flow information, outputting an abnormal early warning of the metering environment.
Compared with the prior art, the invention has the beneficial effects that the three-phase flow information and the microwave signal intensity curves of a plurality of fluid samples are obtained, the disturbed type of the fluid samples is determined based on the environmental information parameters, a plurality of microwave signal intensity curves of the same disturbed type with the three-phase flow information are fitted into the sample curves and stored in the sample library, whether the fluid samples are the disturbed characteristic fluid samples is determined according to the difference condition of the sample curves of different disturbed types, the microwave signal intensity curves of the fluid to be detected are obtained by utilizing the microwave irradiation mode, the three-phase flow information of the fluid to be detected is primarily determined according to the comparison condition with the sample curves, and whether the accuracy of the primary judgment of the three-phase flow information is qualified is determined, acquiring environmental information parameters of fluid to be measured, determining whether to calibrate and compensate microwave irradiation, determining a compensation mode and a calibration compensation amount for calibrating and compensating the microwave irradiation, comparing an acquired microwave signal intensity curve with a sample curve in the sample library after calibration and compensation are completed to acquire corresponding three-phase flow information, selecting output information based on comparison conditions of the three-phase flow information and the primarily determined three-phase flow information, or giving an abnormal early warning to a metering environment, further realizing rapid abnormal risk identification according to specific environmental conditions of mixed fluid, optimizing a measurement mode in an adaptive manner, and improving detection accuracy of the three-phase flow information.
In particular, the invention determines the interfered category of the fluid sample through the environmental information parameters of each fluid sample, and it can be understood that the pipeline noise parameter and the pipeline vibration parameter are closely related to the measurement process of the fluid flowing state, the pipeline noise can be caused by the interaction of three phases in the fluid, can be the flowing noise generated by turbulence during gas-liquid mixing, emulsification state change during liquid-liquid mixing and the like, can also be caused by solid impurities in the fluid impacting the pipeline wall, when the noise exceeds the normal range or presents specific frequency spectrum characteristics, the measurement of the flow of each phase of the fluid can be interfered, the detection precision of the three-phase flow information is affected, the change of the flowing state of the fluid can be represented by the vibration amplitude, the frequency and the direction of the pipeline can be represented, the pulsating flow of the fluid of a certain phase can generate pipeline vibration with specific frequency, the internal periodic interference phenomenon of the fluid is reflected, the invention determines the interfered category of the fluid sample through obtaining the pipeline noise parameter and the pipeline vibration parameter, further, the abnormal risk identification is rapidly carried out according to the specific environmental condition of the mixed fluid, and the detection precision of the three-phase flow information is improved.
Particularly, by fitting a plurality of microwave signal intensity curves of the same interfered category with the same three-phase flow information into a sample curve, it can be understood that under the condition that the three-phase flow information is the same and the interfered category is the same, the microwave signal intensity curves have similar variation trend and characteristics, the curves are fitted into the sample curve, scattered data with the same property can be summarized, representative curve shapes and variation rules are extracted, and in the subsequent online measurement process, the microwave signal intensity curves acquired in real time are compared with the sample curve to quickly judge whether the current three-phase flow information accords with expectations or not, thereby realizing quick abnormal risk identification and improving the detection precision of the three-phase flow information.
In particular, the invention determines whether the fluid sample is the disturbed characteristic fluid sample by comparing the difference conditions of sample curves of different disturbed categories, and can be understood that when the difference of the sample curves of different disturbed categories is small, the flow state of the mixed fluid in a pipeline is relatively stable, the flow velocity of the fluid and the distribution proportion of each phase are not obviously changed, the phenomena of turbulence aggravation, inter-phase separation and the like do not occur, each phase flows in a relatively stable mode, the interaction between the mixed fluid and the pipeline wall is relatively regular, the flow rate of each phase is also in a stable state, the detection precision of three-phase flow information is ensured, when the difference of the sample curves of different disturbed categories is large, the interaction between each phase of the mixed fluid is characterized by complex change, the mixed fluid has local vortex, reflux and other phenomena, the mixed fluid possibly contains solid particles, the energy generated by collision and friction between the particles is outwards transmitted to the pipeline wall in the form noise in the form of sound wave mode, the impact force generated by the collision and friction is transmitted to the pipeline wall to cause the pipeline vibration.
In particular, according to the invention, whether the microwave irradiation is calibrated and compensated is determined through the environmental information parameters of the fluid to be measured, and it can be understood that when the fluctuation difference of the environmental information parameters of the fluid to be measured is large, the signal is disturbed to generate additional scattering and attenuation to cause the increase of measurement errors, the three-phase flow information detection precision is difficult to be ensured only by calibrating and compensating the microwave irradiation, when the fluctuation difference of the environmental information parameters of the fluid to be measured is stable, the microwave irradiation is properly calibrated and compensated, the disturbance to the microwave irradiation can be reduced through the calibration and compensation, the stable propagation characteristic is maintained in the relatively unstable measurement environment, the signal attenuation abnormality caused by environmental factors is reduced, and further, the measurement mode is adaptively optimized to improve the three-phase flow information detection precision.
Particularly, the calibration compensation mode of microwave irradiation in the invention is to reduce the frequency of microwave irradiation, and it can be understood that when the fluctuation difference of environmental information parameters of fluid to be measured is stable, the frequency of reducing microwave irradiation can make the signal to be transmitted in the fluid relatively less disturbed by environment, the transmission characteristic is more stable, the signal fluctuation caused by noise and vibration can be reduced, thereby improving the accuracy and reliability of measurement, the wavelength of low-frequency microwave irradiation is longer, when the low-frequency microwave irradiation interacts with substances of each phase in the mixed fluid, the sensitivity to tiny particles, local non-uniformity and weak fluid change is reduced, the uncertainty of signal attenuation caused by complex microstructure and dynamic change in the fluid can be reduced, the result of estimating the flow of each phase according to the signal attenuation is more accurate, the energy loss of the signal of low-frequency microwave irradiation in the transmission process is relatively slow, the stronger signal strength can be kept at the same measurement distance, the quality of signal reception is improved, the performance and stability of three-phase flow measurement are improved, and further, the measurement mode is adaptively optimized, and the detection accuracy of three-phase flow information is improved.
Especially, the calibration compensation amount of microwave irradiation in the invention has positive correlation with the pipeline noise parameter and positive correlation with the pipeline vibration parameter, and it can be understood that the pipeline noise parameter reflects the information such as the intensity, the frequency range and the change complexity of the noise, when the pipeline noise is larger, the high-frequency microwave irradiation frequency signal is easy to be disturbed by the noise in the transmission process to generate scattering and attenuation abnormality, the normal signal attenuation condition caused by each phase characteristic of the mixed fluid is difficult to be accurately obtained, the frequency of the microwave irradiation needs to be reduced, the influence of the pipeline noise on flow measurement is reduced, the larger the pipeline noise parameter is, the larger the calibration compensation amount of the microwave irradiation is, the pipeline vibration parameter reflects the vibration amplitude, the frequency, the vibration stability and the like, the strong pipeline vibration can destroy the signal propagation stability, the relative position and the physical connection between the signal generator and the receiving end are in dynamic change, the high-frequency microwave irradiation frequency signal is easy to generate distortion and additional attenuation in the unstable environment, the frequency of the microwave irradiation is reduced, the anti-interference capability of the signal in the vibration environment is difficult to be enhanced by adopting the low-frequency signal, the high-frequency signal, the larger the pipeline vibration parameter is required to reduce the frequency of the microwave irradiation, the influence on flow measurement is realized, the three-phase measurement accuracy is improved, and the flow measurement accuracy is improved.
Particularly, the output information is selected according to the comparison condition of the three-phase flow information, and it can be understood that when the three-phase flow information obtained by matching the microwave signal intensity curve obtained after calibration and compensation in the sample library is the same as the three-phase flow information obtained by matching before calibration and compensation, the three-phase flow information is accurate in representation, and when the three-phase flow information obtained by matching the microwave signal intensity curve obtained after calibration and compensation in the sample library is different from the three-phase flow information obtained by matching before calibration and compensation, the three-phase flow information is greatly influenced by environmental interference during measurement, the accurate three-phase flow information cannot be obtained through calibration and compensation, and manual verification is needed, so that the rapid abnormal risk identification according to the specific environmental condition of the mixed fluid is realized, and the detection precision of the three-phase flow information is improved.
Drawings
FIG. 1 is a step diagram of a particle energy type high frequency online three-phase flow metering method according to an embodiment of the invention;
FIG. 2 is a logic flow diagram of determining a disturbed class of a fluid sample in accordance with an embodiment of the invention;
FIG. 3 is a logic flow diagram of determining whether a current fluid sample is a disturbed characteristic fluid sample in accordance with an embodiment of the present invention;
FIG. 4 is a logic flow diagram of determining whether the accuracy of the preliminary determination of three-phase flow information is acceptable in accordance with an embodiment of the present invention.
Detailed Description
The invention will be further described with reference to examples for the purpose of making the objects and advantages of the invention more apparent, it being understood that the specific examples described herein are given by way of illustration only and are not intended to be limiting.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In addition, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or communicating between two members. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, which is a step diagram of a particle energy type high-frequency online three-phase flow metering method according to an embodiment of the present invention, the particle energy type high-frequency online three-phase flow metering method of the present invention includes:
Step S100, three-phase flow information of a plurality of fluid samples and a microwave signal intensity curve of each fluid sample are obtained according to a preset time interval, and the interfered category of the fluid sample is determined based on the environmental information parameters of each fluid sample;
Wherein the environmental information parameters include pipeline noise parameters and pipeline vibration parameters;
Specifically, the preset time interval can be set by a person skilled in the art according to the detection accuracy requirement of the three-phase flow information, the higher the detection accuracy requirement of the three-phase flow information is, the shorter the time interval is set, and preferably, the value range of the time interval can be [1,5], and the interval unit is min.
Specifically, the microwave signal intensity curve may be drawn according to the principle that the absorption degrees of different relative microwave signals in the mixed fluid are different, and a rectangular coordinate system is established by taking the signal intensity of the transmitting end as an abscissa and the signal intensity of the receiving end as an ordinate, which is not described herein.
Specifically, the method for obtaining the pipeline noise parameter is not particularly limited, and preferably, the sound intensity electric signal of the pipeline can be collected through the sound sensor and transmitted to the converter through the amplifying circuit, and the converter converts the sound intensity electric signal into decibel value and outputs the decibel value so as to obtain the pipeline noise parameter.
Specifically, the method for obtaining the pipeline vibration parameters is not particularly limited, preferably, the method can use a capacitive displacement sensor to measure, and the pipeline vibration frequency is obtained by measuring the capacitance change between the polar plates, which is not described herein.
Step S200, fitting a plurality of microwave signal intensity curves of the same interfered category with the same three-phase flow information into a sample curve and storing the sample curve into a sample library, and determining whether the current fluid sample is an interfered characteristic fluid sample according to the difference condition of the sample curves of different interfered categories;
Specifically, by fitting a plurality of microwave signal intensity curves of the same interfered category with the same three-phase flow information into a sample curve, it can be understood that under the condition that the three-phase flow information is the same and the interfered category is the same, the microwave signal intensity curves have similar variation trend and characteristics, the curves are fitted into the sample curve, scattered data with the same property can be summarized, representative curve shapes and variation rules are extracted, in the subsequent online measurement process, the microwave signal intensity curves acquired in real time are compared with the sample curve, whether the current three-phase flow information accords with expectations is rapidly judged, further, rapid abnormal risk identification is realized, and the detection accuracy of the three-phase flow information is improved.
Step S300, a microwave signal intensity curve of the fluid to be detected is obtained by utilizing a microwave irradiation mode, three-phase flow information of the fluid to be detected is primarily determined according to the comparison condition of the microwave signal intensity curve and a sample curve in the sample library, and whether the accuracy of primary determination of the three-phase flow information is qualified or not is determined based on a fluid sample corresponding to the three-phase flow information;
Specifically, the method for irradiating the microwave is not particularly limited, and preferably, a microwave emitting source and a microwave receiver can be respectively arranged at two sides of a fluid pipeline to be detected, so that the microwave directly penetrates through the fluid to obtain energy sent and received by a microwave signal, and three-phase flow information is obtained based on the principle that the microwave can be attenuated differently when passing through different media.
Step S400, in response to the failure of accuracy of the preliminary determination of the three-phase flow information, obtaining environmental information parameters of the fluid to be measured to determine whether to calibrate and compensate the microwave irradiation, including,
Determining a compensation mode and a calibration compensation amount for calibrating and compensating the microwave irradiation, comparing an acquired microwave signal intensity curve with a sample curve in the sample library after completing the calibration and compensation to acquire corresponding three-phase flow information, and selecting output information based on the comparison condition of the three-phase flow information and the preliminarily determined three-phase flow information;
or, an abnormal early warning is sent to the metering environment.
Specifically, referring to fig. 2, which is a logic flow diagram of determining a disturbed class of a fluid sample according to an embodiment of the present invention, the determining the disturbed class of the fluid sample includes:
If the environmental information parameter of the fluid sample accords with the flow signal stability condition, judging that the interfered type of the fluid sample is a non-dominant signal interference type;
And if the environmental information parameters of the fluid sample do not accord with the flow signal stability condition, judging that the interfered type of the fluid sample is dominant signal interference type.
Specifically, the flow signal stabilizing condition is that the maximum value of the pipeline noise parameter does not exceed a preset noise threshold value and the maximum value of the pipeline vibration parameter does not exceed a preset vibration threshold value.
Specifically, the preset noise threshold and vibration threshold may be set by a person skilled in the art according to an average value of several detection data of the three-phase flow information measurement environment, and preferably, the noise threshold may be 60dB and the vibration threshold may be 100Hz.
Specifically, the invention determines the disturbed type of the fluid sample through the environmental information parameters of each fluid sample, and can understand that the pipeline noise parameters and the pipeline vibration parameters are closely related to the measurement process of the fluid flowing state, the pipeline noise can be caused by the interaction of three phases in the fluid, can be the flowing noise generated by turbulence during gas-liquid mixing, emulsification state change during liquid-liquid mixing and the like, can also be caused by solid impurities in the fluid striking the pipeline wall, when the noise exceeds the normal range or presents specific frequency spectrum characteristics, the measurement of the flow of each phase of the fluid can be interfered, the detection precision of the three-phase flow information is influenced, the change of the vibration amplitude, the frequency and the direction of the pipeline can represent the change of the fluid flowing state, the pulsating flow of a certain phase of the fluid can generate pipeline vibration with specific frequency, the internal periodic disturbance phenomenon of the fluid is reflected, the invention determines the disturbed type of the fluid sample through acquiring the pipeline noise parameters and the pipeline vibration parameters, further, the quick abnormal risk identification is realized according to the specific environmental condition of the mixed fluid, and the detection precision of the three-phase flow information is improved.
Specifically, determining the interference coefficient based on the difference condition of sample curves of different interfered categories includes obtaining sample curves of different interfered categories with the same three-phase flow information, and determining the overlap ratio of the sample curves as the interference coefficient of the fluid sample.
Specifically, referring to fig. 3, which is a logic flow diagram of determining whether the current fluid sample is a disturbed characteristic fluid sample according to an embodiment of the present invention, determining whether the current fluid sample is a disturbed characteristic fluid sample further includes:
if the interference coefficient of the current fluid sample meets the normal condition of the fluid sample, not screening the fluid sample;
If the interference coefficient of the current fluid sample does not meet the normal condition of the fluid sample, determining the fluid sample as an interfered characteristic fluid sample;
The normal condition of the fluid sample is that the interference coefficient exceeds a preset interference threshold.
Specifically, the preset interference threshold may be set by a person skilled in the art according to an average value of several detection data of three-phase flow information measurement, and preferably, the interference threshold may be 0.93.
Specifically, the invention determines whether the fluid sample is the disturbed characteristic fluid sample by comparing the difference conditions of sample curves of different disturbed categories, and can be understood that when the difference of the sample curves of different disturbed categories is small, the flow state of the mixed fluid in a pipeline is relatively stable, the flow velocity of the fluid and the distribution proportion of each phase are not obviously changed, the phenomena of turbulence aggravation, inter-phase separation and the like do not occur, each phase flows in a relatively stable mode, the interaction between the mixed fluid and the pipeline wall is relatively regular, the flow rate of each phase is also in a stable state, the detection precision of three-phase flow information is ensured, when the difference of the sample curves of different disturbed categories is large, the interaction between each phase of the mixed fluid is characterized by complex change, the mixed fluid has local vortex, reflux and other phenomena, the mixed fluid possibly contains solid particles, the energy generated by collision and friction between the particles is outwards transmitted to the pipeline wall in the form of sound wave form, the impact force generated by the collision and friction is transmitted to the pipeline wall to cause the pipeline vibration.
Specifically, determining the three-phase flow information of the fluid to be measured includes calculating the coincidence ratio of the microwave signal intensity curve of the fluid to be measured and each sample curve, and determining the three-phase flow information of the sample curve corresponding to the maximum value of the coincidence ratio as the three-phase flow information of the fluid to be measured.
Specifically, referring to fig. 4, which is a logic flow diagram of determining whether the accuracy of the preliminary determination of the three-phase flow information is acceptable according to an embodiment of the present invention, determining whether the accuracy of the preliminary determination of the three-phase flow information is acceptable includes:
If the fluid sample corresponding to the three-phase flow information is the fluid sample with the disturbed characteristic, determining that the accuracy of the preliminary judgment of the three-phase flow information is unqualified;
And if the fluid sample corresponding to the three-phase flow information is not the disturbed characteristic fluid sample, determining that the accuracy of the preliminary judgment of the three-phase flow information is qualified.
Specifically, determining whether to calibrate and compensate for the microwave irradiation includes:
acquiring a pipeline noise parameter and a pipeline vibration parameter of the current fluid to be tested;
If the environment information meets the compensation condition, calibrating and compensating the microwave irradiation;
if the environment information does not accord with the compensation condition, an abnormal early warning is sent to the metering environment;
the compensation condition is that the average value of the pipeline noise parameters does not exceed a preset environment noise reference value or the average value of the pipeline vibration parameters does not exceed a preset environment vibration reference value.
Specifically, the preset environmental noise reference value and the environmental vibration reference value may be set by those skilled in the art according to actual environmental information measured by the three-phase flow information, and preferably, the environmental noise reference value may be 120dB and the environmental vibration reference value may be 220Hz.
Specifically, whether the microwave irradiation is calibrated and compensated is determined through the environmental information parameters of the fluid to be measured, and it can be understood that when the fluctuation difference of the environmental information parameters of the fluid to be measured is large, the signal is disturbed to generate extra scattering and attenuation, so that the measurement error is increased, the three-phase flow information detection precision is difficult to be ensured by only calibrating and compensating the microwave irradiation, when the fluctuation difference of the environmental information parameters of the fluid to be measured is stable, the microwave irradiation is properly calibrated and compensated, the disturbance to the microwave irradiation can be reduced through the calibration and compensation, stable propagation characteristics are maintained in a relatively unstable measurement environment, and abnormal signal attenuation caused by environmental factors is reduced, so that the measurement mode is optimized adaptively, and the three-phase flow information detection precision is improved.
Specifically, the calibration compensation mode of the microwave irradiation is to reduce the frequency of the microwave irradiation, and the calibration compensation amount of the microwave irradiation has a positive correlation with the pipeline noise parameter and a positive correlation with the pipeline vibration parameter.
Specifically, the calibration compensation mode of microwave irradiation in the invention is to reduce the frequency of microwave irradiation, and it can be understood that when the fluctuation difference of environmental information parameters of fluid to be measured is stable, the frequency of reducing microwave irradiation can make the signal to be transmitted in the fluid relatively less disturbed by environment, the transmission characteristic is more stable, the signal fluctuation caused by noise and vibration can be reduced, thereby improving the accuracy and reliability of measurement, the wavelength of low-frequency microwave irradiation is longer, when the low-frequency microwave irradiation interacts with substances of each phase in the mixed fluid, the sensitivity to tiny particles, local non-uniformity and weak fluid change is reduced, the uncertainty of signal attenuation caused by complex microstructure and dynamic change in the fluid can be reduced, the result of estimating the flow of each phase according to the signal attenuation is more accurate, the energy loss of the signal of low-frequency microwave irradiation in the transmission process is relatively slow, the stronger signal strength can be kept at the same measurement distance, the quality of signal reception is improved, the performance and stability of three-phase flow measurement are improved, and further, the measurement mode is adaptively optimized, and the detection accuracy of three-phase flow information is improved.
Specifically, the calibration compensation amount of microwave irradiation in the invention has positive correlation with the pipeline noise parameter, and has positive correlation with the pipeline vibration parameter, and it can be understood that the pipeline noise parameter reflects the information such as the intensity, the frequency range and the varying complexity of the noise, when the pipeline noise is large, the high-frequency microwave irradiation frequency signal is easy to be disturbed by the noise in the transmission process to generate scattering and attenuation abnormality, the normal signal attenuation condition caused by each phase characteristic of the mixed fluid is difficult to be accurately obtained, the frequency of the microwave irradiation needs to be reduced, the influence of the pipeline noise on flow measurement is reduced, the larger the pipeline noise parameter is, the larger the calibration compensation amount of the microwave irradiation is, the pipeline vibration parameter reflects the amplitude, the frequency and the stability of the vibration, and the like of the vibration, the strong pipeline vibration can destroy the stability of the signal propagation, so that the relative position and the physical connection between the signal generator and the receiving end are in dynamic variation, the high-frequency microwave irradiation frequency signal is easy to generate distortion and additional attenuation in the unstable environment, the frequency of the microwave irradiation is reduced, the anti-interference capability of the signal in the vibration environment is difficult to be obtained, the high-frequency signal can be enhanced, the larger the frequency irradiation frequency is required to reduce the frequency of the microwave irradiation, the influence on the flow measurement, the flow measurement accuracy is improved, and the flow measurement accuracy is realized.
Specifically, selecting output information based on the comparison of the three-phase flow information includes:
calculating the coincidence ratio of the microwave signal intensity curve after calibration and compensation and each sample curve, and determining the three-phase flow information of the sample curve corresponding to the maximum value of the coincidence ratio as the three-phase flow information after calibration and compensation;
if the three-phase flow information is the same as the primarily determined three-phase flow information, outputting corresponding three-phase flow information after calibration and compensation are completed;
And if the three-phase flow information is different from the primarily determined three-phase flow information, outputting an abnormal early warning of the metering environment.
Specifically, the output information is selected according to the comparison condition of the three-phase flow information, and it can be understood that when the three-phase flow information obtained by matching the microwave signal intensity curve obtained after calibration and compensation in the sample library is the same as the three-phase flow information obtained by matching before calibration and compensation, the three-phase flow information is accurate, when the three-phase flow information obtained by matching the microwave signal intensity curve obtained after calibration and compensation in the sample library is different from the three-phase flow information obtained by matching before calibration and compensation, the environment interference influence on the three-phase flow information is large, the accurate three-phase flow information cannot be obtained through calibration and compensation, and manual verification is needed, so that the rapid abnormal risk identification according to the specific environment condition of the mixed fluid is realized, and the detection precision of the three-phase flow information is improved.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The particle energy type high-frequency online three-phase flow metering method is characterized by comprising the following steps of:
Acquiring three-phase flow information of a plurality of fluid samples and a microwave signal intensity curve of each fluid sample according to a preset time interval, and determining the interfered category of the fluid samples based on environmental information parameters of each fluid sample;
Wherein the environmental information parameters include pipeline noise parameters and pipeline vibration parameters;
Fitting a plurality of microwave signal intensity curves of the same interfered category with the same three-phase flow information into sample curves and storing the sample curves into a sample library, and determining whether the current fluid sample is an interfered characteristic fluid sample according to the difference condition of the sample curves of different interfered categories;
Acquiring a microwave signal intensity curve of the fluid to be measured by utilizing a microwave irradiation mode, preliminarily determining three-phase flow information of the fluid to be measured according to the comparison condition of the microwave signal intensity curve and a sample curve in the sample library, and determining whether the accuracy of preliminary determination of the three-phase flow information is qualified or not based on a fluid sample corresponding to the three-phase flow information;
If the fluid sample corresponding to the three-phase flow information is the fluid sample with the disturbed characteristic, determining that the accuracy of the preliminary judgment of the three-phase flow information is unqualified;
in response to the failure of the accuracy of the preliminary determination of the three-phase flow information, obtaining environmental information parameters of the fluid under test to determine whether to calibrate and compensate for the microwave irradiation, including,
Acquiring a pipeline noise parameter and a pipeline vibration parameter of the current fluid to be tested;
If the environment information meets the compensation condition, calibrating and compensating the microwave irradiation;
if the environment information does not accord with the compensation condition, an abnormal early warning is sent to the metering environment;
The compensation condition is that the average value of the pipeline noise parameters does not exceed a preset environment noise reference value or the average value of the pipeline vibration parameters does not exceed a preset environment vibration reference value;
determining a compensation mode and a calibration compensation amount for calibrating and compensating the microwave irradiation, comparing an acquired microwave signal intensity curve with a sample curve in the sample library after completing the calibration and compensation to acquire corresponding three-phase flow information, and selecting output information based on the comparison condition of the three-phase flow information and the preliminarily determined three-phase flow information;
The calibration compensation mode of the microwave irradiation is to reduce the frequency of the microwave irradiation, wherein the calibration compensation quantity of the microwave irradiation has a positive correlation with the noise parameter of the pipeline and has a positive correlation with the vibration parameter of the pipeline;
calculating the coincidence ratio of the microwave signal intensity curve after calibration and compensation and each sample curve, and determining the three-phase flow information of the sample curve corresponding to the maximum value of the coincidence ratio as the three-phase flow information after calibration and compensation;
if the three-phase flow information is the same as the primarily determined three-phase flow information, outputting corresponding three-phase flow information after calibration and compensation are completed;
if the three-phase flow information is different from the primarily determined three-phase flow information, outputting an abnormal early warning of the metering environment;
or, an abnormal early warning is sent to the metering environment.
2. The particle energy high frequency online three phase flow metering method of claim 1, wherein the process of determining the disturbed class of the fluid sample comprises:
If the environmental information parameter of the fluid sample accords with the flow signal stability condition, judging that the interfered type of the fluid sample is a non-dominant signal interference type;
And if the environmental information parameters of the fluid sample do not accord with the flow signal stability condition, judging that the interfered type of the fluid sample is dominant signal interference type.
3. The particle energy type high frequency on-line three-phase flow metering method according to claim 2, wherein the flow signal stabilizing condition is that the maximum value of the pipeline noise parameter does not exceed a preset noise threshold value and the maximum value of the pipeline vibration parameter does not exceed a preset vibration threshold value.
4. The method of particle energy high frequency online three-phase flow metering according to claim 3, wherein determining the interference factor based on the difference in sample curves of different interfered classes comprises,
And acquiring sample curves of different interfered categories with the same three-phase flow information, and determining the coincidence degree of the sample curves as the interference coefficient of the fluid sample.
5. The particle energy high frequency online three phase flow metering method of claim 4, wherein determining whether the current fluid sample is a disturbed characteristic fluid sample further comprises:
if the interference coefficient of the current fluid sample meets the normal condition of the fluid sample, not screening the fluid sample;
If the interference coefficient of the current fluid sample does not meet the normal condition of the fluid sample, determining the fluid sample as an interfered characteristic fluid sample;
The normal condition of the fluid sample is that the interference coefficient exceeds a preset interference threshold.
6. The particle energy high frequency online three phase flow metering method of claim 5, wherein determining three phase flow information of the fluid under test comprises:
calculating the coincidence ratio of the microwave signal intensity curve of the fluid to be measured and each sample curve, and determining the three-phase flow information of the sample curve corresponding to the maximum value of the coincidence ratio as the three-phase flow information of the fluid to be measured.
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