Efficient Modelling of Asphaltene Precipitation

Abstract

An efficient modelling technique based on the representation of the precipitated asphaltene as a pure dense phase is presented. The success of the approach is based on the division of the heaviest component in the oil into a nonprecipitating and a precipitating component.The characterization of these components is discussed. This model was able to make quantitative predictions of experimental data from the literature as well as additional data from industry. This was achieved with only a small number of adjustable parameters (two or three). The mechanistic aspect of the model with regards to colloidal nature of asphaltene/resin micelles is also discussed. An algorithm for three-phase flash calculations with asphaltene precipitation is described.

Visual investigation and modeling of asphaltene precipitation and deposition during CO2 miscible injection into oil reservoirs

“…The fourth model is solid model in which the solid phase is considered as two main parts, precipitating and non-precipitating asphaltene. There are too many matching parameters needed to tune this model with the experimental data [36].…”

“…The reference fugacity could be calculated from a data point on the asphaltene precipitation envelope (APE) [46].…”

Effects of Asphaltene Solvency on Stability of Water-in-Crude-Oil Emulsions

“…Waste minimization and cleanup have become the focus It has been suggested that the asphaltenes tend to form of environmental policies in the petroleum industry (2)(3)(4)(5)(6)(7)(8). aggregates which have an adsorbed covering sheath of aroAs a preliminary step during refinery treatment, crude oils matic resins as a stabilizing layer (43)(44)(45). These proposed are normally desalted to remove species such as chloride interactions between the resins and asphaltenes are illussalts which poison refinery catalysts and enhance corrosion trated in Fig.…”

Asphaltene Precipitation During Different Production Operations

“…Thermodynamic-colloidal model is the usable approach that has been introduced by Leontarities and Mansoori (1987) for asphaltene flocculation. This model is more applicable to situations where there is a dissociation of the asphaltene/resin micelles (Nghiem et al, 1993). Asphaltene aggregates are assumed to be stabilized by a layer of resins and the precipitation of asphaltene is thermodynamically irreversible.…”