Determining the pvt properties of a hydrocarbon reservoir fluid

Details Determining the pvt properties of a hydrocarbon reservoir fluid Determining the pvt properties of a hydrocarbon reservoir fluid

E - Fixed Constructions

21

B

E21B 49/08 (2006.01) G01N 33/28 (2006.01)

Patent

CA 2434657

A method of determining an in situ PVT property of a hydrocarbon reservoir fluid that is present in a hydrocarbon-bearing formation layer traversed by a borehole, which method comprises the steps of: a) calculating along the hydrocarbon-bearing formation layer the pressure gradient; and b) determining the in situ PVT property from the pressure gradient using an empirical relation that had been obtained by fitting a curve (11) through previously obtained data points (12, 13, 14) comprising the measured PVT property as a function of the pressure gradient.

Cette invention se rapporte à un procédé qui permet de déterminer une propriété PVT (pression, volume et température) in situ d'un fluide de gisement d'hydrocarbures qui est présent dans une couche de formation souterraine de gisement d'hydrocarbures traversée par un puits de forage, ce procédé consistant: a) à calculer le gradient de pression le long de ladite couche de la formation de gisement d'hydrocarbures et b) à déterminer la propriété PVT in situ à partir de ce gradient de pression en utilisant une relation empirique qui a été obtenue par adaptation d'une courbe (11) le long de points de données préalablement obtenus (12, 13, 14) comprenant la propriété PVT mesurée comme fonction du gradient de pression.

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