Action de divers diluants sur les produits pétroliers lourds : mesure, interprétation et prévision de la floculation des asphaltènes

Hotier, G.; Robin, Monique

doi:10.2516/ogst:1983007

Cited by 57 publications

(36 citation statements)

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“…These parameters are: -the chain length of the n-alkane used as flocculant; -the type of solvent used; -the temperature; -the pressure. Hotier and Robin (1983) demonstrate, for the series of n-alkanes, that the maximum flocculation point is obtained with n-heptane, then that it drops as the number of carbons increases, whereas the percentage of flocculated asphaltenes decreases with the number of carbon atoms. Ghloum and Oskui (2004) obtain the same result and demonstrate that the flocculation point in a tank oil at 20°C and 208 bar drops with the number of carbon atoms for the following series of flocculants: CO 2 , C 2 , C 3 , n-C 4 , n-C 5 , n-C 6 , n-C 7 .…”

Section: Results Of the Studiesmentioning

confidence: 99%

“…Reichert et al (1986) test four solvents: toluene, a gas oil, a highly aromatic diesel and a slightly aromatic diesel, and demonstrate that with the bitumen studied, highly aromatic diesel is the best solubilising agent. Hotier and Robin (1983) and Fuhr et al (1991) study the effect of temperature on the flocculation point. They demonstrate that the flocculation point decreases slightly, which indicates that the crude becomes more unstable as the temperature rises.…”

Section: Results Of the Studiesmentioning

confidence: 99%

“…The same technique has been used by other authors (Fuhr et al, 1991;Reichert et al, 1986). Hotier et Robin (1983) suggested the use of light scattering to determine the flocculation point, since this technique is more progressive, it can be automated and it is easier to implement than the previous methods. Since the crudes used are first diluted (to allow light to pass through the crude/solvent medium), the flocculation point can be studied as a function of the quantity and type of solubilising agent used.…”

Section: Observation Of Flocculation Point By Light Scatteringmentioning

confidence: 99%

“…Studies have been conducted in the Institut Français du Pétrole (Hotier and Robin, 1983;Hotier, 1982) to determine this flocculation point by light scattering. The authors even patented the method (FR2566909, 1986).…”

Section: Observation Of Flocculation Point By Light Scatteringmentioning

confidence: 99%

“…The quantity of asphaltenes precipitated also varies with the chain length of the n-alkane used. Several authors (Hotier and Robin, 1983;Corbett and Petrossi, 1978;Mitchell and Speight, 1973) have demonstrated that the quantity of asphaltenes precipitated varies very little for nalkanes heavier than n-heptane and increases significantly for shorter n-alkanes. This probably explains the existence of numerous normalised operating protocols corresponding to precipitations using n-heptane (ASTM D3279, IP 143, NFT 60 115).…”

Section: Introductionmentioning

confidence: 99%

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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: Results Of the Studiesmentioning

confidence: 99%

Section: Results Of the Studiesmentioning

confidence: 99%