Application of a new association equation of state for prediction of asphaltenes and resins deposition

Asphaltene deposition is a severe problem which can cause fouling in the reservoir, in the well, in the pipeline and in the oil production and processing facilities. Association Equation of State (AEOS) is one of the most useful models that can be used to predict asphaltene phase behavior as well as asphaltene deposition conditions. For an AEOS, it is assumed that the total compressibility factor consists of physical and chemical parts. In this study, the conventional form of compressibility factor developed by Soave will be applied as physical compressibility factor. However, for chemical compressibility factor a new form will be proposed. The obtained total compressibility factor is then utilizedto calculate asphaltene and resin deposits. The calculated amounts of deposited asphaltenes by the proposed model together with experimental results are used to calculate resin deposit. Comparison with experimental results shows that the new proposed model can be used to predict the amounts of deposited resins and asphaltenes within an acceptable range of accuracy.

کلیدواژه ها:

Asphaltenes ، Resins ، Deposition ، Association Equation of State