Correlation method for measurements of total and fractional immiscible media flow rates and a device for its embodiment

A correlation method for measurements of total and fractional flow rates of multiphase immiscible media comprising:

• identifying two control sections located on a pipeline at a fixed distance from each other;
• scanning the flow in said control sections by a rotating high-frequency electrical field with measuring a fluctuation of the dielectric characteristics of the flow in each of the control sections and subsequent processing of the signals scanned by the electrical field for identifying an area having a pick amplitude, and further calculating of a correlation function of said processed signals scanned by the electrical field;
• scanning the flow in said control sections by a rotating high-frequency magnetic field having a signal with the same carrier frequency as the scanning frequency of the rotating high-frequency electrical field with measuring a fluctuation of the magnetic field in each of the control sections and subsequent processing of the signals scanned by the magnetic field for identifying an area having a pick amplitude, and further calculating of a correlation function of said processed signals scanned by the magnetic field;
• measuring time of a flow transportation at a pick of the correlation function of the scanned signals;
• calculating an integral correlation function by using the results of the calculation of said two correlation functions, while an amplitude of the signals scanned by the electrical field or sum of the amplitudes of said two signals are scaled by aligning them in relation to signals scanned by the magnetic field;
• determining summary volume of the flow rate by using a measured time of a flow transportation;
• and
• comparing said two correlation functions of the processed signals scanned by the electrical and magnetic fields and of the integral correlation function with the correlation functions determined for the standardized characteristics in a database and selecting in said database the correlation characteristics having the most similar values to said processed signals, and determination of fractional portions of multiphase medium in the control section by using, for example, interpolation.

A device for measurements of total and fractional flow rates of multiple immiscible media, comprising:

• two measuring sections which are set apart from each other on a pipeline, each of said sections being equipped with a unit for measuring fluctuations of dielectric flow characteristics and with a unit for measuring fluctuations of scanning magnetic field in multiphase flow;
• a high-frequency scanning signal generator coupled with said units for measuring fluctuations;
• four units for determining amplitude-phase frequency characteristics to process recorded signals generated by said units for measuring fluctuations, said units for measuring fluctuations of the scanning magnetic field being coupled with the first and the second units, respectively, for determining amplitude-phase frequency characteristics, while said units for measuring fluctuations of dielectric flow characteristics are coupled with the third and the fourth units for determining amplitude-phase frequency characteristics;
• two units for calculating a correlation function of recorded signals, the first and the second units for determining amplitude-phase frequency characteristics being coupled with the first unit for calculating a correlation function, and the third and the fourth units for determining amplitude-phase frequency characteristics being coupled with the second unit for calculating a correlation function;
• a controlling microprocessor for processing the results of measurement and comparing them with standardized characteristics, while a first input of the microprocessor is coupled with the first unit for calculating the correlation function via a scaling unit and a second input of the microprocessor is coupled with the second unit for calculating the correlation function;
• and
• a unit for storing the standardized characteristics coupled with a third input of the microprocessor for sending therein said characteristics and comparing them with the results of measurement.

A correlation method for measurements of total and fractional flow rates of multiphase immiscible media comprising:

• identifying two control sections located on a pipeline at a fixed distance from each other;
• scanning the flow in said control sections by a rotating high-frequency electrical field with measuring a fluctuation of dielectric characteristics of the flow in each control section and subsequent processing of the signals scanned by the electrical field for identifying an area having a pick amplitude and further calculating of a correlation function of said processed scanned signals;
• scanning the flow in said control sections by a rotating high-frequency magnetic field having a signal with the same carrier frequency as the scanning frequency of the rotating high-frequency electrical field with measuring a fluctuation of the magnetic field in each control section and subsequent processing of the signals scanned by the magnetic field for identifying an area having a pick amplitude and further calculating of a correlation function of said processed scanned signals;
• measuring time of a flow transportation at a pick of the correlation function of the scanned signals;
• calculating an integral correlation function by using the results of calculation of said two correlation functions, while an amplitude of the signals scanned by the electrical field or sum of the amplitudes of said two signals are scaled by aligning them in relation to signals scanned by the magnetic field;
• comparing said two correlation functions of the processed signals scanned by the electrical and magnetic fields and of the integral correlation function with the correlation functions determined for the standardized characteristics in a database with further selecting in said database the correlation characteristics having the most similar values to said processed signals;
• determining resonance frequencies and phase shifts of the signals scanned by the electrical and magnetic fields, actual and imaginary components of a complex dielectric constant, actual and imaginary components of magnetic losses by using measured amplitude-frequency characteristics, comparing the resulting values with the standardized characteristics in the database to identify the signal with the most similar parameters, and calculating fractional portions of the selected components of the multiphase medium;
• determining summary volume of the flow rate by using a measured time of a flow transportation;
• and
• determining fractional portions of the multiphase medium in the control sections by using the characteristics picked-out from a database by using, for example, interpolation, and subsequent determination of the fractional rates of multiphase flow by specifying the summary volume and the fractional portions.

A device for measurements of total and fractional flow rates of multiple immiscible media, comprising:

• two measuring sections that are set apart from each other on a pipeline, each of which is equipped with a unit for measuring fluctuations of dielectric flow characteristics and with a unit for measuring fluctuation of scanning magnetic field in multiphase flow;
• a high-frequency scanning signal generator coupled to said units for measuring fluctuations;
• four units for determining amplitude-phase frequency characteristics to process recorded signals generated by said units for measuring fluctuations, said units for measuring fluctuations of the scanning magnetic field being coupled with the first and the second units, respectively, for determining amplitude-phase frequency characteristics, while said units for measuring fluctuations of dielectric flow characteristics are coupled with the third and the fourth units for determining amplitude-phase frequency characteristics;
• two units for calculating a correlation function of recorded signals, the first and the second units for determining amplitude-phase frequency characteristics being coupled with the first unit for calculating a correlation function, and the third and the fourth units for determining amplitude-phase frequency characteristics being coupled with the second unit for calculating a correlation function;
• a controlling microprocessor for processing the results of measurement and comparing them with standardized characteristics, while a first input of the microprocessor is coupled with the first unit for calculating a correlation function via a scaling unit and a second input of the microprocessor is coupled with the second unit for calculating a correlation function;
• and
• a unit for storing the standardized characteristics coupled with a third input of the microprocessor for sending therein said characteristics and comparing them with the results of measurements.