Determining the PVT properties of a hydrocarbon resevoir fluid

摘要

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 involves 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 ) having the measured PVT property as a function of the pressure gradient.