Patent ID: 8271248

Claim:
A method for characterizing petroleum fluid in a reservoir traversed by at least one wellbore, the method comprising: (a) at a plurality of measurement, stations within the at least one wellbore, acquiring at least one fluid sample at the respective measurement station and performing downhole fluid analysis of the fluid sample to measure properties of the fluid sample, the properties including asphaltene content and at least one other fluid property; (b) using at least one model that characterizes the relationship between a particular fluid property and asphaltene content at different measurement stations to calculate a predicted value of the particular fluid property for at least one given measurement station of said plurality of measurement stations, wherein the at least one model comprises a first model that characterizes the relationship between viscosity and asphaltene content at different measurement stations to calculate a predicted value of fluid viscosity for at least one given measurement station; (c) performing a consistency check involving comparison of the predicted value of the particular fluid property for the at least one given measurement station with the corresponding fluid property measured by the downhole fluid analysis for the at least one given measurement station; and (d) using the results of the consistency check for reservoir analysis.