| 摘要 |
A method for determining at least one dynamic flow characteristic of a multiphase flow circulating in a pipe, said flow being composed of an aqueous phase and a hydrocarbon (oil) phase. Oxygen atoms in the aqueous phase are activated by irradiation with neutrons at a chosen first location in the pipe. The concentration of activated oxygen at a chosen second location in the pipe is measured with a detector as a function of time t, so as to obtain at least one signal S(t). Then a relationship is fitted to the signal S(t) so as to derive the values of the velocity U of the aqueous phase. The slip velocity vs of a dispersed phase relative to the velocity of a continuous phase is also advantageously determined. From the values of velocities U and vs and from the volume fraction y1 of the continuous phase in the pipe (obtained by an ancillary measurement), the volumetric flow rates of the phases are determined.
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