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Asphaltenes is a highly viscous material that may precipitate from reservoir oils during normal production or as a result of gas injection. Asphaltene precipitation is highly unwanted because precipitated asphaltenes may plug wells or other process equipment.

With the PVTsim asphaltene module it is possible to evaluate the conditions at which asphaltene precipitation is likely to take place. The simulation options include a PT curve option providing upper and lower asphaltene precipitation pressures with temperature. The effect of gas injection on the asphaltene precipitation conditions can be studied using a Px-curve option.

The asphaltene model has been developed based on experimental live oil asphaltene precipitation data. Tuning to experimental asphaltene onset pressures is an option.