Tabatabaei-Nejad - Department of Chemical Engineering, Sahand University of Technology, Tabriz, Iran
Hadi Ebrahimi - Department of Chemical Engineering, Sahand University of Technology, Tabriz, Iran
Hossein Ebrahimi - Department of Mechanical Engineering, Isfahan University of Technology, Isfahan, Iran

Asphaltene depositions are serious problem encountered during the exploration of the oil reservoirs, miscible flooding, heavy oil recovery, or even primary depletion. A thermodynamic model was used to model asphaltene precipitation in crude oil in the reservoir. The asphaltene is assumed pure pseudo-component in solid phase. The characterization of unknown-heavy fraction of petroleum (i.e. C7+) was obtained with Whitson et al. method and assumed the heaviest component of crude oil is divided by two components, precipitating and non-precipitating. The results are good agreement with some experimental data.

Petroleum Reservoirs; Asphaltene Precipitation; EOS; Thermodynamic Model; VLE