Dispersed Systems in Heavy Crude Oils

Abivin, Patrice; Hénaut, I.; Chaudemanche, Cyril; Argillier, Jean-François; Chinesta, Francisco; Moan, M.

doi:10.2516/ogst/2008045

Cited by 16 publications

(10 citation statements)

References 45 publications

(44 reference statements)

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“…There are several studies reported in the literature that have applied DSC to determine emulsion type, water content in water-in-oil emulsions, emulsion stability, the ratio of dispersed water and the presence of additives [105][106][107][108].…”

Section: Differential Scanning Calorimetrymentioning

confidence: 99%

Stability Proxies for Water-in-Oil Emulsions and Implications in Aqueous-based Enhanced Oil Recovery

2011

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Several researchers have proposed that mobility control mechanisms can positively contribute to oil recovery in the case of emulsions generated in Enhanced-Oil Recovery (EOR) operations. Chemical EOR techniques that use alkaline components or/and surfactants are known to produce undesirable emulsions that create operational problems and are difficult to break. Other water-based methods have been less studied in this sense. EOR processes such as polymer flooding and LoSal TM injection require adjustments of water chemistry, mainly by lowering the ionic strength of the solution or by decreasing hardness. The decreased ionic strength of EOR solutions can give rise to more stable water-in-oil emulsions, which are speculated to improve mobility ratio between the injectant and the displaced oil. The first step toward understanding the connection between the emulsions and EOR mechanisms is to show that EOR conditions, such as salinity and hardness requirements, among others, are conducive to stabilizing emulsions. In order to do this, adequate stability proxies are required. This paper reviews commonly used emulsion stability proxies and explains the advantages and disadvantage of methods reviewed. This paper also reviews aqueous-based EOR processes with focus on heavy oil to contextualize in-situ emulsion stabilization conditions. This context sets the basis for comparison of emulsion stability proxies.

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Section: Differential Scanning Calorimetrymentioning

confidence: 99%

Stability Proxies for Water-in-Oil Emulsions and Implications in Aqueous-based Enhanced Oil Recovery

2011

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“…The authors suggest that the foamy oil behaves as an anisotropic material, its viscosity being reduced in the flow direction, which facilitates its transport, and increased in the normal direction, which contributes to maintain the bubbles dispersed within the oil. In a later paper [48], the same type of behaviour was evidenced in presence of water droplets.…”

Section: Tests and Specific Tools For Studying Foaming And Defoaming mentioning

confidence: 60%

“…However, in the case of heavy oils, bubbles remain dispersed within the oil, leading to a system that resembles "chocolate mousse" and typically referred to as a "foamy oil phenomenon", even though if a more appropriate term should be "bubbly oil", as the gas volume fraction is typically found to be between 5 and 40%. This phenomenon appears during higher production rates than expected by reservoir modelling [30,[47][48][49][50][51][52][53][54][55][56][57][58][59][60][61].…”

Section: Petroleum Based Foams and Foamy Oilsmentioning

confidence: 91%

“…In their review on foamy oil flow, Sheng et al [66] indicate that the presence of water has no measurable effect on the nucleation of bubbles, hence on bubble frequency but it has an influence on the rheological behaviour of the mixtures. Abivin et al [48] have compared the rheological behaviour of a multiphase dispersed system, namely gas bubbles and water droplets embedded inside a heavy crude oil, to the one of a system containing only bubbles. They found that the bubbly emulsion is less viscous than the original emulsion.…”

Section: Factors Contributing To Crude Oil Foam Formationmentioning

confidence: 99%

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Non-Aqueous and Crude Oil Foams

Blázquez

Emond

Schneider

et al. 2013

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

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D o s s i e rRe´sume´-Mousses non aqueuses et mousses pe´trolie`res -Les mousses produites a`partir de syste`mes non aqueux sont moins fre´quentes que les mousses a`base d'eau, mais elles jouent un roˆle important dans de nombreuses applications et proce´de´s industriels. La faible tension de surface des liquides a`base d'hydrocarbures limite l'adsorption des agents de surface classiques et par conse´quent diffe´rents compose´s et me´thodes doivent eˆtre conside´re´s afin de ge´ne´rer et de stabiliser les mousses a`base d'huile. De meˆme, le cassage des mousses non aqueuses inde´sirables ne´cessite des conside´rations spe´cifiques a`ces syste`mes. Les mousses de pe´trole pre´sentent un inte´reˆt particulier de par leur complexite´en raison de la grande varie´te´des compose´s et des gaz qui peuvent les constituer. Nous pre´sentons dans cet article un aperc¸u des principaux me´canismes reconnus comme importants pour la stabilite´des mousses non aqueuses avec une conside´ration toute particulie`re pour les mousses de pe´trole brut.Abstract -Non-Aqueous and Crude Oil Foams -Foams produced from non-aqueous media are less common than water-based foams but they play an important role in many industries and engineering processes. The low surface tension of hydrocarbon fluids limits the adsorption of common surface activity substances and different compounds and methods must be considered to generate and stabilize oil-based foam. Likewise, the destruction of unwanted non-aqueous based foam requires specific considerations not found with aqueous systems. Of particular interest are petroleum-based foams, which are highly complex due to the wide variety of compounds and gases that can be found. We provide an overview of the major mechanisms known to be important for non-aqueous foam stability with a spotlight on crude-oil foams.

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“…Surprisingly, there have been inconsistent findings on rheological behavior of oilfield emulsion. According to Abivin et al [10], the researchers manifested a Newtonian behavior at low shear rates, below 100 s −1 , when they measured the viscosity of live fluid emulsions for water cut of ≤30 w/w%.…”

Section: Introductionmentioning

confidence: 99%

Temperature Effect on Shear Thinning Behavior of Low-Viscous Oilfield Emulsion

Husin¹,

Hussain²

2018

Science and Technology Behind Nanoemulsions

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Crude oil emulsion is causing a lot of problems, especially during crude oil production. There are many ways to mitigate the emulsion problems but this leads to an increment in operating expenses of oil production. In order to comply with the standard sales oil quality, crude oil emulsion must be treated properly. Hence, better understanding of emulsion is essential since emulsion can be available in almost all phases of oil production and processing. This chapter describes how temperature parameters would affect the rheological property of a low-viscous emulsion and how it would become a significant point associated with stability of crude oil emulsion in oilfield production. Experimental results indicated that the water-in-crude oil emulsion formed from low-viscous crude oil exhibits a non-Newtonian shear thinning behavior, which was best presented by the Herschel-Bulkley rheological model. Temperature ranges from 20 to 90°C were examined to study the effect of temperature toward shear stress and viscosity of oilfield emulsion. Measurement of shear stress at shear rates higher than 600 s −1 is a new direction in rheology study that not much is known about its effect on shear stress.

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Dispersed Systems in Heavy Crude Oils

Cited by 16 publications

References 45 publications

Stability Proxies for Water-in-Oil Emulsions and Implications in Aqueous-based Enhanced Oil Recovery

Stability Proxies for Water-in-Oil Emulsions and Implications in Aqueous-based Enhanced Oil Recovery

Non-Aqueous and Crude Oil Foams

Temperature Effect on Shear Thinning Behavior of Low-Viscous Oilfield Emulsion

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