Modeling of asphaltene and wax precipitation

Chung, F.T.H.; Sarathi, Partha; Jones, R.D.

doi:10.2172/6347484

Cited by 51 publications

(48 citation statements)

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“…Chung et al (1991) published results which showed that a quarter of the asphaltenes flocculated with n-pentane were redissolved. Kokal et al (1992) show that with two Canadian oils, the precipitates formed could be redissolved by adding heavy oil.…”

Section: Flocculation Reversibility?mentioning

confidence: 99%

Characterisation of Asphaltenes and Modelling of Flocculation – State of the Art

Pina¹,

Mougin²,

Béhar³

2006

Oil & Gas Science and Technology - Rev. IFP

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Résumé -Caractérisation des asphaltènes et modélisation de la floculation -État de l'Art -Ce travail présente un état de l'art concernant la floculation des asphaltènes avec deux grands items : la caractérisation des asphaltènes dans différents milieux et la modélisation de la floculation. Cette revue commence par une caractérisation des asphaltènes proprement dite puis des caractérisations de ces derniers dans des solvants synthétiques ou des bruts. Nous insistons sur les techniques de détermination de masses molaires et de diffraction. L'incidence d'un ajout de bon/mauvais solvant est également discutée. La seconde partie de cette revue concerne la modélisation de la floculation. Elle examine les différents modèles de la littérature avant de présenter celui de Szewczyk et Béhar (1999) et son intégration dans un simulateur de réservoir. Les modèles disponibles requièrent encore des données expérimentales délicates à acquérir et un effort de recherche doit être réalisé pour améliorer cet état de fait. Abstract -Characterisation of Asphaltenes and Modelling of Flocculation -State of the Art -This document describes a state of the art concerning the flocculation of asphaltenes with two major sections: characterisation of asphaltenes in various environments and modelling of flocculation. This review starts with the characterisation of asphaltenes as such, then their characterisation in synthetic solvents or crudes. Emphasis is placed on molar mass determination and diffraction techniques. The impact of adding a good/poor solvent is also discussed. The second part of this review is dedicated to modelling.We first examine the various models in the literature before describing the Szewczyk and Béhar (1999) model and its integration in a reservoir simulator. The models available still require experimental data which is difficult to collect and further research is needed to improve this situation.Petroleum Industry Applications of Thermodynamics Applications de la thermodynamique dans l'industrie pétrolière

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Section: Flocculation Reversibility?mentioning

confidence: 99%

Characterisation of Asphaltenes and Modelling of Flocculation – State of the Art

Pina¹,

Mougin²,

Béhar³

2006

Oil & Gas Science and Technology - Rev. IFP

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“…Components which contain the large amount of N, S, and O atoms are known as asphaltene [1,2]. They have high molecular weight and complex combination with cyclic structures and paraffin chain which is connected to the NSO atoms [3,4].…”

Section: Introductionmentioning

confidence: 99%

Behavior of Asphaltene Adsorption onto the Metal Oxide Nanoparticle Surface and Its Effect on Heavy Oil Recovery

Kazemzadeh

Eshraghi

Kazemi

et al. 2015

Ind. Eng. Chem. Res.

141

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It is an important concern to prevent asphaltene related damages in hydrocarbon reservoirs.There are many investigations about asphaltene and its effects and how to reduce them during the oil production. In the present work, some experiments have been conducted to investigate the effect of the SiO2, NiO, and Fe3O4 nanoparticles on the oil recovery, and find out how they adsorb asphaltene and prevent its precipitation. Moreover, instead of crude oil, a synthetic solution with a given component concentration is used. Results of this study show that in solutions without nanoparticles, increase in the amount of normal heptane causes more asphaltene aggregation takes place; however, in the presence of nanoparticles, increasing the normal heptane would result in an increase in the asphaltene adsorption on the surface of nanoparticles. Furthermore, It is shown that the amount of oil recovery in the presence of different nanoparticles corresponds to the ordering: SiO2> NiO> Fe3O4.

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“…Hirschberg et al (1984) and Chung et al (1991) reported a series of titration experiments in tank-oil samples with liquid alkanes from n-pentane to n-hexadecane as diluents, to determine the precipitation onset composition, the amount of material precipitated, and the solubility properties of asphaltenes. Kokal et al (1992) reported the amount of asphaltenes precipitated when two Canadian heavy oils with a high content of asphaltenes were titrated with various n-alkanes (n-pentane to n-decane) at different dilution ratios.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Compositional Changes of Binary Mixtures of n-alkane solvents on the Precipitation of Heavy Organics from a Solution of Crude Oil Residue

Udourioh¹,

Ibezim-Ezeani²,

Ofodile³

2015

Journal of Applied Sciences and Environmental Management

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ABSTRACT:The effect of precipitant compositional changes on the precipitation of heavy organics (HO) from a solution of crude oil residue using binary mixtures of n-alkane solvents was studied. Heavy organic precipitates were generated using different ratios of C 5 :C 6 , C 6 :C 7 and C 5 :C 7 n-alkane solvents. The result obtained showed that for binary mixtures at 1:0, 3:1, 2:1, 1:1, 1:2, 1:3 and 0:1 ratios, the weight percentage precipitates of C 5 :C 6 were 11. The results have shown that the quantity of HO precipitate decreases with increasing quantity of higher carbon number of n-alkane solvent to a minimum value at 2:1 ratio. From the minimum value, it rises to a maximum at 1:1 ratio as the proportion of C n+x to C n (where C is carbon atom, n and x represent the number of carbon atom) increases. The quantity of HO precipitate decreases again to a minimum at 1:2 ratio as the proportion of C n+x increases further, and finally to the lowest value at pure C n+x . The conclusion is that the components of the crude oil residue undergo a three-stage phase transition as the volume ratios of the n-alkane solvents vary. This study can lead to a better understanding of the phase behavior of heavy organics under compositional changes and hence the prediction of heavy organic precipitation. © JASEM http://dx.doi.org/10.4314/jasem/v19i3.26

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Modeling of asphaltene and wax precipitation

Cited by 51 publications

References 1 publication

Characterisation of Asphaltenes and Modelling of Flocculation – State of the Art

Characterisation of Asphaltenes and Modelling of Flocculation – State of the Art

Behavior of Asphaltene Adsorption onto the Metal Oxide Nanoparticle Surface and Its Effect on Heavy Oil Recovery

The Effect of Compositional Changes of Binary Mixtures of n-alkane solvents on the Precipitation of Heavy Organics from a Solution of Crude Oil Residue

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