Review of the effect of asphaltene deposition on the minimum miscibility pressure for using the PC-SAFT equation of s tate

The formation of sediments in the oil indus try is one of the mos t important problems in its various production sectors. These sediments lead to pipe plugging, increase in pipe thickness, channeling of oil flow, reduction in effective area of the pipe and consequently increase in pressure drop. Injection of miscible gas into the oil tank is one of the fas tes t growing enhanced oil recovery (EOR) methods in the world. Measuring the minimum miscibility of MMP is one of the mos t important s teps in planning a miscible gas injection project, for which several experimental and modeling methods have been proposed. One of the mos t important tools for unders tanding the phenomenon of asphaltene deposition is thermodynamic models and experimental relationships for predicting asphaltene deposition. Asphaltene deposition changes the composition of the oil components when it is next to the gas injection, which in turn causes a change in the minimum mixing pressure. Since mos t hydrocarbon mixtures contain nonpolar components, simple EoS can predict the phase behavior of a hydrocarbon mixture. However, for more complex sys tems, a more accurate EoS mus t be used. Also, MMP values decrease with increasing molecular weight in the injection gas