Patent ID: 7289943

Claim:
A method for projecting dimensioning and management of surface installations of a hydrocarbon reservoir under production, by means of a lumping method for estimating the properties or the behavior of fluids comprising liquid and/or vapor hydrocarbon phases from data relative to a reference set consisting of hydrocarbon mixtures in a series of thermodynamic states resulting from determined conditions of production of the hydrocarbon reservoir, characterized in that it comprises: grouping each one of said hydrocarbon mixtures into at least three constituents (V, I, H), none of these constituents corresponding to a particular selection of base components or pseudo-components that would be used for a detailed compositional description of the fluids, considering that the gas phases resulting from separation under surface conditions of each one of the hydrocarbon mixtures are mixtures from which third constituent (H) is excluded, and that the oil phases resulting from the separation under surface conditions of each one of the hydrocarbon mixtures are mixtures from which first constituent (V) is excluded, determining by material balance the compositions of the separation products comprising, for the gaseous products, at least the first and the second constituent (V, I) in variable proportions and, for the liquid products, at least the second and the third constituent (I, H) in variable proportions, determining the at least three-constituent composition of each hydrocarbon mixture of the reference set by combination of the products of the separation thereof in proportion to the amounts of each separation product, simulating a production of the hydrocarbon reservoir while establishing detailed compositional profiles from the at least three-constituent composition, and projecting dimensioning and management of the surface installations from the simulated production of the hydrocarbon reservoir.