Interfacial rheological studies of extra-heavy crude oils and asphaltenes: Role of the dispersion effect of resins in the adsorption of asphaltenes at the interface of water-in-crude oil emulsions

Acevedo, Sócrates; Escobar, Gastón; Gutiérrez, Luis Felipe Higuita; Rivas, Hercilio; Gutiérrez, Xiomara

doi:10.1016/0927-7757(93)80028-d

Cited by 79 publications

(54 citation statements)

References 14 publications

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“…When mixing water and crude oil, a water in oil emulsion most often is created because the surface active amphiphilic molecules in the crude are mostly oil soluble due to their low polarity (depending on pH for fatty acids) and molecular weight [24]. As the viscosity of an emulsion is always larger than the viscosity of the continuous phase, it is obvious that for transporting highly viscous heavy oil it is necessary to make an emulsion with water as the continuous phase [25][26][27].…”

Section: Application To Heavy Oil Transportationmentioning

confidence: 99%

Crude Oil Emulsion Properties and Their Application to Heavy Oil Transportation

Langévin

Poteau

Hénaut

et al. 2004

Oil & Gas Science and Technology - Rev. IFP

326

214

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Résumé -Propriétés des émulsions de pétrole brut et leurs applications au transport des bruts lourds -De nombreuses avancées ont été réalisées dans le domaine des émulsions ces dernières années.Le comportement des émulsions est en grande partie contrôlé par les propriétés des couches adsorbées qui protègent les surfaces entre l'huile et l'eau. La connaissance de la seule tension interfaciale n'est pas suffisante pour comprendre les propriétés des émulsions ; la rhéologie de surface joue un rôle important dans de nombreux phénomènes dynamiques. La complexité des émulsions pétrolières vient de la composition de l'huile en termes de molécules présentant un caractère tensioactif comme les acides gras de faible masse moléculaire, les acides naphténiques et les asphaltènes. Ces molécules peuvent interagir et se réorganiser aux interfaces huile/eau. Le caractère non linéaire prononcé de la rhéologie de surface obtenu avec des couches d'asphaltènes peut expliquer les différences de comportement entre les émulsions de tensioactif et les émulsions d'asphaltène. Cet article présente une revue des propriétés des émulsions pétrolières. L'application au transport d'hydrocarbures très visqueux sous forme d'émulsion aqueuse est ensuite considérée. Abstract -Crude Oil Emulsion Properties and their Application to Heavy Oil TransportationMany advances have been made in the field of emulsions in recent years. Emulsion behavior is largely controlled by the properties of the adsorbed layers that stabilize the oil-water surfaces. The knowledge of surface tension alone is not sufficient to understand emulsion properties, and surface rheology plays an important role in a variety of dynamic processes. The complexity of petroleum emulsions comes from the oil composition in terms of surface-active molecules contained in the crude

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Section: Application To Heavy Oil Transportationmentioning

confidence: 99%

Crude Oil Emulsion Properties and Their Application to Heavy Oil Transportation

Langévin

Poteau

Hénaut

et al. 2004

Oil & Gas Science and Technology - Rev. IFP

326

214

View full text Add to dashboard Cite

show abstract

“…It is not clear if the particles were asphaltenes, wax, or another substance, or if the particles were present before the sample was frozen for the micrograph. However, rheological studies also indicate that water-crude oil interfaces contain particles (14,15). These methods do not indicate whether the particles are colloids, micelles, or precipitated solids.…”

Section: Introductionmentioning

confidence: 98%

Water-in-Hydrocarbon Emulsions Stabilized by Asphaltenes at Low Concentrations

Yarranton

Hussein

Masliyah

2000

Journal of Colloid and Interface Science

292

233

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“…Note that a rigid interface has high elasticity (high surface energy provides a strong driving force to restore deformation). Elastic asphaltene films have been observed and their visco-elastic properties quantified using the Langmuir film balance technique [6][7][8], shear viscometry [9][10][11][12], and recently oscillatory drop shape analysis [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%