On the Stabilization Mechanism of Water-in-Oil Emulsions in Petroleum Systems

and, Jan Czarnecki; Moran, Kevin

doi:10.1021/ef0501400

Cited by 183 publications

(196 citation statements)

References 26 publications

(44 reference statements)

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“…-asphaltenes 1,11,12,123 -naphthenic acids [124][125][126] . It must be noticed that their properties strongly depends on their ionization degree, i.e.…”

Section: Asphaltenes As Stabilizersmentioning

confidence: 99%

Model molecules mimicking asphaltenes

Sjöblom

Simon

2015

Advances in Colloid and Interface Science

161

132

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“…-asphaltenes 1,11,12,123 -naphthenic acids [124][125][126] . It must be noticed that their properties strongly depends on their ionization degree, i.e.…”

Section: Asphaltenes As Stabilizersmentioning

confidence: 99%

Model molecules mimicking asphaltenes

Sjöblom

Simon

2015

Advances in Colloid and Interface Science

161

132

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“…The asphaltenic material from the oil adsorbs slowly and irreversibly and forms rigid skins of water-in-oil emulsions in competition with surfactant-like species, which is fast and reversible [55]. Sztukowski et al indicate that asphaltene properties have a significant impact on emulsion stability even for emulsions partially stabilized by solids, and asphaltenes with a larger molar mass make more stable emulsion [36].…”

Section: Asphaltenesmentioning

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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“…These substances act as lipophilic Contents lists available at ScienceDirect journal homepage: www.elsevier.com/locate/ces emulsifiers (Stanford et al, 2007a(Stanford et al, , 2007bSpiecker and Kilpatrick, 2004;Fan et al, 2009). The stability of water droplets in diluted bitumen is believed to be enhanced by the presence of bi-wettable fine solids, which occupy oil-water interfaces and confer stability against phase separation (Spiecker et al, 2003;Czarnecki and Moran, 2005;Angle et al, 2007;Gafonova and Yarranton, 2001) Methods currently available for demulsifying petroleum emulsions can be broadly classified as chemical, electrical and mechanical. Chemical demulsification is induced by chemical additives to destabilize the protective interfacial films and hence accelerate the emulsion breaking process.…”

Section: Introductionmentioning

confidence: 99%