Asphaltene precipitation has been one of the major problems in oil industry, and its modeling is still believed to be a quite complex issue due different characteristics thousands heavy components crude oil. There have several attempts model asphaltene using various equations state empirical models. In past few years, association models based on CPA SAFT found promising for studies precipitation. this work, we compare results obtained from approaches CPA, PC-SAFT with (PC-SAFT (WA)), without...

Equations of state represent the cornerstone thermodynamic models. They have potential being used for a wide range properties, systems and conditions thus in many practical applications relevance to chemical, petroleum, environmental other types engineering disciplines. with great appeared first 19th century form van der Waals (and similar ones) almost 150 years, both these classical more advanced equations shown potential. This manuscript presents opinion authors on capabilities -...

Miscible and immiscible gas flooding is one of the enhanced oil recovery (EOR) techniques that has been widely used to increase production. One critical problems with it generally aggravates asphaltene precipitation, which further creates a flow assurance problem. Therefore, imperative investigate beforehand effect injection into reservoir from modeling results. The cubic-plus-association (CPA) equation state (EoS) previously applied model onset precipitation condition. In this work, we...

In this study, different modeling approaches using the Cubic Plus Association (CPA) equation of state (EoS) are developed to calculate asphaltene precipitation onset condition and yield from degassed crude oil during addition n-paraffin. A single model parameter is fitted n-paraffin precipitants (n-pentane n-hexadecane). Three parameters per precipitant precipitant. The results obtained compared with experimental data for eight oils. Results were also seven crudes Perturbed Chain Statistical...

The Cubic-Plus-Association (CPA) equation of state (EoS) has already been proven to be a successful model for phase equilibrium calculations systems containing glycols. In the present work, we interface thermodynamic property package (ThermoSystem), based on CPA, with Aspen HYSYS through CAPE-OPEN standards. We, then, simulate certain binary and multicomponent where experimental data are available in literature which critical process design natural gas dehydration units by triethylene glycol...

Gas injection is a proven enhanced oil recovery technique. The gas changes the reservoir composition, temperature, and pressure conditions, which may result in asphaltene precipitation. In this work, we have used modeling approach from literature order to predict precipitation onset condition during injection. with Soave–Redlich–Kwong, Soave–Redlich–Kwong-Plus-Huron–Vidal mixing rule cubic-plus-association (CPA) equations of state (EoS). Six different fluids are studied respect nitrogen,...