Patent ID: 8201458

Claim:
A method for determining values of flow rates of each of components of a liquid hold up of a multiphase flow circulating in a main pipe of an oil well, the pipe comprising a central line, the multiphase flow including a gaseous phase and liquid phases, the liquid phases including water and oil, the method comprising: measuring a total quantity of a flow (Qtot), a total quantity of a gas (Qgas) and a total quantity of a liquid phase (Qliq) of the flow using a multiphase flow meter; disposing an inlet of a core sampler inside the main pipe, the inlet comprising a central axis, at a place where a concentration of the liquid phases in the flow is greater than an average concentration of the liquid phase in the main pipe, to obtain a derived sample, the derived sample having a greater concentration of oil and water than an average concentration in the main pipe; measuring a quantity of water (Qwater) and a quantity of oil (Qoil) of the derived sample; and calculating from the measured quantity of water (Qwater) and the quantity of oil (Qoil) of the derived sample and from the total quantity of the liquid phase (Qliq) measured by the multiphase flow meter, quantities of water and oil in the multiphase flow.