Toward mechanistic understanding of heavy crude oil/brine interfacial tension: The roles of salinity, temperature and pressure

Moeini, Farzaneh; Hemmati-Sarapardeh, Abdolhossein; Ghazanfari, Mohammad Hossein; Masihi, Mohsen; Ayatollahi, Shahab

doi:10.1016/j.fluid.2014.04.017

Cited by 247 publications

(201 citation statements)

References 65 publications

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“…The brine concentration was changed between 0.0-2.0 M for both NaCl and CaCl 2 and we examined the oil/water IFT for dodecane, toluene and the dodecane-toluene mixture. In all systems studied, the IFT increased with salt concentration in contrast with the recent results of Moeini et al [8] that found a moderate decrease of the IFT of heavy crude oil and brine up to ~40000 ppm for both NaCl and CaCl 2 brine then, the IFT increased linearly with further addition of salt. This can be ascribed to the presence in their systems of a polar component, asphaltene, in the organic phase that accumulates at the interface and interacts favorably with the ions at low salt concentration.…”

Section: Resultscontrasting

confidence: 99%

“…Some studies [7,8] have reported an initial decrease with later linear increase of the IFT with brine concentration, resulting in the existence of a critical brine concentration that minimizes the IFT. However, other studies have reported no significant influence of NaCl concentration on the IFT [9] and even a decrease of the IFT with increasing salinity of the aqueous phase [10].…”

Section: Introductionmentioning

confidence: 99%

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Molecular dynamics simulations of the role of salinity and temperature on the hydrocarbon/water interfacial tension

et al. 2017

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Interfacial tension of some hydrocarbon/water systems, including a mixture of aliphatic and aromatic hydrocarbons, has been estimated on the basis of molecular dynamics simulations. The dependence of the interfacial properties on the salinity of the aqueous phase and the temperature has been simulated. Different concentrations in NaCl and CaCl 2 up to 2 M have been used. It is found that, in all considered cases, interfacial tension increases with salt concentration. This effect depends on the preference of the salt ions for the bulk of the aqueous phase that, in turns, results in an increased difficulty for the water molecules to be at the interface. The influence of salinity is fundamentally electrostatic in origin and does not depends on the chemical nature of the salt cation. Finally, the impact of temperature on the dodecane/brine interfacial tension has also been inspected. A decreasing of the values of the interfacial tension is found in agreement, both in trend and magnitude, with experimental available data.

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Section: Resultscontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Molecular dynamics simulations of the role of salinity and temperature on the hydrocarbon/water interfacial tension

et al. 2017

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“…this occurrence completely agrees with the literature with states at the event of augmentation in salt concentration the electric conductivity increases [15]. Moreover, the term salinity refers to the presence of the major dissolved inorganic solutes, essentially Na + , Mg 2+ , Ca 2+ , K + , Cl -, HCO 3 -1 , and CO -1 , in aqueous samples [16], [17]. Consequently, the salinity has directly influenced the density, viscosity and the interfacial tension of the external phase.…”

Section: Effect Of Salinity In the External Phasesupporting

confidence: 90%

“…al [19]. The interfacial tension against the salinity content agrees well with the literature [17]- [20]. The authors clarified that the impurities such as brine solutions and bentonite increases the surface tension when inorganic salts are introduced into the medium since water molecules form a cage like structure bonded by hydrogen molecules, which makes the water molecules intact with the water-oil interface.…”

Section: Effect Of Salinity In the External Phasesupporting

confidence: 82%

Terminal Velocity of Heavy Crude Oil in Aqueous Solution: Effects of pH and Salinity

Zameek¹,

Lim²,

Lau³

2016

IPCBEE

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Abstract.The terminal velocity and the flow behavior of heavy crude oil droplet motion within different aqueous solutions were studied in terms of pH level and aqueous salt concentration. Results showed that the density difference between the oil droplet and the external phase has a significant effect over viscosities and the interfacial tension of each phase. On the other hand, the terminal velocity of oil droplets expresses a negative deviation compared to the theoretical values due to impurities in the aqueous solutions. The present study was conducted for diameters ranging from 5.18 mm to 11.88 mm which resulted in Reynolds number ranging from 590.19 to 1678.18. The transitional phase of deformation for crude oil in pH solutions and salt solutions have been presented as 11-13 mm and 6-8 mm respectively.

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“…However, relatively low electrolyte concentrations cause a small decrease in tension, a phenomenon known as the Jones-Ray effect, after the first researchers to report it, in 1937 [59]. While the original work focused on electrolyte effects on surface tension, some recent studies have considered the behavior at hydrocarbon/water interfaces [60], including the crude oil/water interface [61], because of their relevance to some of the applications mentioned earlier in the present paper.…”

Section: Na Adsorption At the N-heptane/water Interfacementioning

confidence: 91%

Metal Ion Interactions with Crude Oil Components: Specificity of Ca2+ Binding to Naphthenic Acid at an Oil/Water Interface

Taylor

Chu

2018

Colloids and Interfaces

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Abstract:On the basis of dynamic interfacial tension measurements, Ca 2+ has been shown specifically to interact with naphthenic acid (NA) at the n-heptane/water interface, consistent with NA adsorption followed by interfacial complexation and formation of a more ordered interfacial film. Optimum concentrations of Ca 2+ and NA have been found to yield lower, time-dependent interfacial tensions, not evident for Mg 2+ and Sr 2+ or for several alkali metal ions studied. The results reflect the specific hydration and coordination chemistry of Ca 2+ seen in biology. Owing to the ubiquitous presence of Ca 2+ in oilfield waters, this finding has potential relevance to the surface chemistry underlying crude oil recovery. For example, "locking" acidic components at water/oil interfaces may be important for crude oil emulsion stability, or in bonding bulk oil to mineral surfaces through an aqueous phase, potentially relevant for carbonate reservoirs. The relevance of the present results to low salinity waterflooding as an enhanced crude oil recovery technique is also discussed.

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Toward mechanistic understanding of heavy crude oil/brine interfacial tension: The roles of salinity, temperature and pressure

Cited by 247 publications

References 65 publications

Molecular dynamics simulations of the role of salinity and temperature on the hydrocarbon/water interfacial tension

Molecular dynamics simulations of the role of salinity and temperature on the hydrocarbon/water interfacial tension

Terminal Velocity of Heavy Crude Oil in Aqueous Solution: Effects of pH and Salinity

Metal Ion Interactions with Crude Oil Components: Specificity of Ca2+ Binding to Naphthenic Acid at an Oil/Water Interface

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