G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 33/22 (2006.01) G01N 33/28 (2006.01)
Patent
CA 2359978
The invention concerns a method whereby a fluid sample is brought (1) at constant pressure Pe and temperature maintaining the heavy fractions, in particular asphaltenes, in dissolved state and/or in stable colloidal state, at the intake (4) of a capillary passage with high pressure drop. Said sample is forced to flow through the capillary conduit, at an increasing flow rate. The method consists in measuring (11) the fluid pressure Ps and the fluid flow rate D (12) at the outlet (5) of the capillary conduit and in representing the variation curve of the quantity .DELTA.P = Pe - Ps or the quantity D as a function of the other quantity or as a function of time. The deposit pressure, characteristic of the threshold of deposit of heavy fractions, is defined as the value of pressure Ps, which corresponds to a change of the slope in the variation curve of the quantity .DELTA.P or the quantity D.
Un échantillon du fluide est amené (1), à pression Pe et température constantes maintenant les fractions lourdes, notamment asphaltènes, à l'état dissous et/ou à l'état colloïdal stable, à l'entrée (4) d'un passage capillaire (3) à forte perte de charge. Ledit échantillon est contraint de s'écouler à travers le conduit capillaire, avec un débit croissant. On mesure (11) la pression de fluide Ps et le débit D (12) de fluide en sortie (5) du conduit capillaire et représente la courbe de variation de la grandeur .DELTA.P = Pe - Ps ou de la grandeur D en fonction de l'autre grandeur ou en fonction du temps. On définit comme pression de dépôt, caractéristique du seuil de dépôt des fractions lourdes, la valeur de la pression Ps, qui correspond à un changement de la pente de la courbe de variation de la grandeur .DELTA.P ou de la grandeur D.
Broseta Daniel
Durandeau Marc
Jose Jacques
Robin Michel
Zhou Honggang
Institut Francais Du Petrole
Robic
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