A simple model for asphaltene deposition in petroleum mixtures

Vafaie-Sefti, Mohsen; Dehghani, Seyed Ali Mousavi; Mohammad-Zadeh, Mohammad

doi:10.1016/s0378-3812(02)00301-1

Cited by 55 publications

(23 citation statements)

References 17 publications

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“…The effects of different gases on asphaltene stability have previously been studied in various fluids. Experimental investigation of asphaltene aggregation due to N 2 injection showed asphaltene particles tend to precipitate as the amount of injected N 2 increases (Jamaluddin et al, 2002), and other gases such as CO 2 , methane and propane could increase the asphaltene instability (Vafaie-Sefti et al, 2003). In addition to the fact that these parameters affect asphaltene stability, they could also change the Asphaltene Precipitation Envelope (APE).…”

Section: Introductionmentioning

confidence: 99%

Prediction of the Gas Injection Effect on the Asphaltene Phase Envelope

Bahrami

Kharrat

Mahdavi

et al. 2014

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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and available online here Cet article fait partie du dossier thématique ci-dessous publié dans la revue OGST, Vol. 70, n°6, pp. 909-1132 et téléchargeable ici D o s s i e rOil & Gas Science and Technology -Rev. IFP Energies nouvelles, Vol. 70 (2015), No. 6, pp. 909-1132 Copyright © 2015, IFP Energies nouvelles > Editorial -Enhanced Oil Recovery (EOR), Asphaltenes and HydratesÉditorial -EOR «récupération assistée du pétrole», Asphaltènes et Hydrates D. Langevin and F. Baudin ENHANCED OIL RECOVERY (EOR) > HP-HT Drilling Mud Based on Environmently-Friendly Fluorinated ChemicalsBoues de forage HP/HT à base de composés fluorés respectueux de l'environnement Abstract -Asphaltene instability may occur when pressure, temperature and compositional variations affect the reservoir oil. Permeability reduction, wettability alteration, and plugging of wells and flow lines are the consequences of this phenomenon. Therefore, it is crucial to investigate the asphaltene behavior in different thermodynamic conditions by knowing the Asphaltene Precipitation Envelope (APE) in a preventive way rather than the costly clean-up procedures. The selected reservoir oil has faced a remarkable decline in production due to several years of extraction, and Enhanced Oil Recovery (EOR) has been considered as a solution. Therefore, in this paper, a comprehensive study was carried out to predict the effects of different injected gases on asphaltene onset and to prevent future asphaltene precipitation based on the laboratory data. The Advanced Redlich-Kwong-Soave (RKSA) equation of state was considered to develop APE using Multiflash (Infochem Co.). For the selected reservoir oil, with temperature reduction at low temperatures, asphaltene precipitation weakened and made the onset pressure decrease, so this behavior is different from the results obtained in other published reports. On the basis of this model, several sensitivity analyses were performed with different gases (i.e., methane, CO 2 , N 2 and associated gases) to compare the risk of each gas for future EOR strategies. APE tend to expand as the amount of injected gases increases, except for CO 2 gas injection, that showed another unconventional behavior for this crude oil. It was observed that for CO 2 gas injection below a certain temperature, asphaltene stability increased, which can be considered as a good inhibitor of asphaltene precipitation.Re´sume´-Pre´vision de l'effet d'injection de gaz sur l'enveloppe de phase des asphalte`nes -L'instabilite´des asphalte`nes peut se produire lorsque des variations de pression, de tempe´rature et de composition affectent les re´servoirs d'huile conduisant a`une re´duction de la perme´abilite´, a`l'alte´ration de la mouillabilite´et au blocage de l'e´coulement dans les puits et les conduites. Par conse´quent, il est crucial d'e´tudier le comportement des asphalte`nes pour diffe´rentes conditions thermodynamiques en connaissant leur domaine de pre´cipitation (APE, Asphaltene Precipitation Envelope) de manie`re pre´ventive pour limiter les ope´ra...

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Section: Introductionmentioning

confidence: 99%

Prediction of the Gas Injection Effect on the Asphaltene Phase Envelope

Bahrami

Kharrat

Mahdavi

et al. 2014

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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“…Other association models, such as chemical theories incorporated in cubic equations of state, have also been applied to the study of asphaltene phase behaviour [166][167][168]. In the work of Vafaie-Sefti et al [166] a model consisting of at least fifteen components (and pseudocomponents) is used with the PR equation of state combined with a chemical contribution [169,170] to describe different oils; both asphaltenes and resins are considered to associate.…”

Section: Cubic Plus Associationmentioning

confidence: 99%

Thermodynamic modelling of asphaltene precipitation and related phenomena

Forte

Taylor

2015

Advances in Colloid and Interface Science

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“…Chung (1992) developed his precipitation model by treating asphaltene as a lumped pseudo-component (compound) and the other components as solvents. Vafaie et al (2003Vafaie et al ( , 2006 applied association theory to the prediction of asphaltene deposition.…”

Section: Asphaltene Precipitation Modelmentioning

confidence: 99%

Polymer solution and lattice theory applications for modeling of asphaltene precipitation in petroleum mixtures

Dehghani¹,

Nematollahzadeh

Vafaie-Sefti

2008

Braz. J. Chem. Eng.

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-Here asphaltene precipitation in petroleum reservoirs during natural depletion and miscible gas injection is modeled via two distinct and new methods (polymer solution and lattice theories). The first model is based on the polymer solution theory, which is a combination of Miller's combinatorial term with a modified residual term of the original Flory-Huggins theory. The second one is the application of the wellknown Sanchez-Lacombe equation of state (SL EOS) to describe the phase behavior of asphaltene compounds in crude oil. The results of both models show an acceptable and good agreement between the real data (field and experimental) and these two models. As it can be seen from the obtained results of these two models, it seems application of the lattice or polymer solution theories (based on The Miller's combinatorial term) could give the better and more close to real data.

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A simple model for asphaltene deposition in petroleum mixtures

Cited by 55 publications

References 17 publications

Prediction of the Gas Injection Effect on the Asphaltene Phase Envelope

Prediction of the Gas Injection Effect on the Asphaltene Phase Envelope

Thermodynamic modelling of asphaltene precipitation and related phenomena

Polymer solution and lattice theory applications for modeling of asphaltene precipitation in petroleum mixtures

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