Procédé et dispositif de débimétrie pour effluentspétroliers.

摘要

The invention relates to a flow rate measurement method adapted to oil effluents made up of multiphase fluid mixtures comprising water, oil, and gas. The effluent is passed through a Venturi in which the effluent is subjected to a pressure drop (DELTAp), a mean value () of the pressure drop is determined over a period t1 corresponding to a frequency f1 that is low relative to the frequency at which gas and liquid alternate in a slug flow regime, a mean value () is determined for the density of the fluid mixture at the constriction of the Venturi over said period t1, and a total mass flow rate value is deduced for the period t1 under consideration from the mean values of pressure drop and of density.