A method and apparatus for measuring the composition and...

G - Physics – 01 – N

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G01N 27/00 (2006.01) G01N 22/00 (2006.01) G01N 33/26 (2006.01)

Patent

CA 2572955

A method for determining the composition and water salinity of a multi- component mixture of a gas and at least one liquid, including water, in a pipe (1), the method comprising the following steps: a. electromagnetic phase measurements are performed between two receiving antennas (4) located at different distances from a sending antenna (3), b. based on an empirically determined constant(s) and the above measurements, the effective and imaginary dielectric constants are determined, c. the mixture density is determined, d. the temperature and pressure are determined e. based on the knowledge of densities, effective dielectric constants and imaginary dielectric constants of the components of the fluid mixture and the results of the above steps a-d, the volume fractions of the gas and liquid or liquids of the fluid mixture and salinity of the water are calculated. An apparatus for performing the method is also disclosed.

L'invention concerne un procédé pour déterminer la composition et la salinité de l'eau d'un mélange multicomposant d'un gaz et d'au moins un liquide, incluant de l'eau dans un tuyau (1). Le procédé comprend les étapes suivantes : a. des mesures de phase électromagnétique sont effectuées entre deux antennes de réception (4) localisées à différentes distances d'une antenne d'émission (3), b. sur la base de constante(s) déterminée(s) empiriquement et des mesures ci-dessus, les composantes diélectriques réelles et imaginaires sont déterminées, c. la densité du mélange est déterminée, d. la température et la pression sont déterminées e. sur la base de la connaissance des densités, des constantes diélectriques réelles et des constantes diélectriques imaginaires des composants du mélange de liquides et les résultats des étapes a à d ci-dessus, les fractions volumiques du gaz et du ou des liquides du mélange de liquides fluides et la salinité de l'eau sont calculées. Un appareil pour mettre en AEuvre le procédé est aussi décrit.

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