Patent ID: 8781632
Filing Date: 2014-07-15
Classification: G01N

Abstract:
1. A method for determining concentration of constituents of an aqueous phase, the aqueous phase being one of from a petroleum related system and in a petroleum related system, the method comprising: measuring a plurality of different properties of the aqueous phase, the plurality of different properties being at least same in number as a number of plural constituents of unknown concentrations comprised in the aqueous phase, the plurality of different properties varying differently from each other in dependence on variation in concentration in the aqueous phase of each of the plural constituents, the plurality of different properties being selected from a group consisting of: electrical conductivity, sound velocity, rate of change of sound velocity with temperature, and rate of change of electrical conductivity with temperature; and determining the concentration in the aqueous phase of at least one of the plural constituents by applying the measurements of the plurality of different properties of the aqueous phase to a model of predetermined relationships between the plurality of different properties and concentrations of the plural constituents which characterize how the plurality of different properties vary differently from each other in dependence on variation in concentration in the aqueous phase of each of the plural constituents.