Patent ID: 7403863
Filing Date: 2008-07-22
Classification: G01F

Abstract:
1. 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.