Mechanistic studies of enhanced oil recovery by imidazolium-based ionic liquids as novel surfactants

Pillai, Prathibha; Kumar, Amit; Mandal, Ajay

doi:10.1016/j.jiec.2018.02.024

Cited by 162 publications

(118 citation statements)

References 39 publications

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“…Surfactants can increase the capillary number by decreasing the capillary force responsible for trapping oil, and thus more oil can be recovered. Many studies have focused on surfactant flooding Edited by Yan-Hua Sun 1 3 (Howe et al 2015;Yadali Jamaloei et al 2011;Kianinejad et al 2013Kianinejad et al , 2014Yadali Jamaloei and Kharrat 2009;Lohne and Fjelde 2012;Daoshan et al 2004;Seethepalli et al 2004;Wu et al 2006;Pillai et al 2018). In addition, laboratory results indicate that nanoparticles can reasonably recover more of the trapped oil (Bera and Belhaj 2016).…”

Section: Introductionmentioning

confidence: 99%

Temperature effect on performance of nanoparticle/surfactant flooding in enhanced heavy oil recovery

2019

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Recently, nanoparticles have been used along with surfactants for enhancing oil recovery. Although the recent studies show that oil recovery is enhanced using nanoparticle/surfactant solutions, some effective parameters and mechanisms involved in the oil recovery have not yet been investigated. Therefore, the temperature effect on the stability of nanoparticle/surfactant solutions and ultimate oil recovery has been studied in this work, and the optimal concentrations of both SiO 2 nanoparticle and surfactant (sodium dodecyl sulfate) have been determined by the Central Composite Design method. In addition, the simultaneous effects of parameters and their interactions have been investigated. Study of the stability of the injected solutions indicates that the nanoparticle concentration is the most important factor affecting the solution stability. The surfactant makes the solution more stable if used in appropriate concentrations below the CMC. According to the micromodel flooding results, the most effective factor for enhancing oil recovery is temperature compared to the nanoparticle and surfactant concentrations. Therefore, in floodings with higher porous medium temperature, the oil viscosity reduction is considerable, and more oil is recovered. In addition, the surfactant concentration plays a more effective role in reservoirs with higher temperatures. In other words, at a surfactant concentration of 250 ppm, the ultimate oil recovery is improved about 20% with a temperature increase of 20 °C. However, when the surfactant concentration is equal to 750 ppm, the temperature increase enhances the ultimate oil recovery by only about 7%. Finally, the nanoparticle and surfactant optimum concentrations determined by Design-Expert software were equal to 46 and 159 ppm, respectively. It is worthy to note that obtained results are validated by the confirmation test.

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Section: Introductionmentioning

confidence: 99%

Temperature effect on performance of nanoparticle/surfactant flooding in enhanced heavy oil recovery

2019

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“…The cationic monomers interact with negatively charged adsorbed materials, mostly carboxylic groups, by electrostatic forces and desorb them from the rock surface by forming an ion pair (Gupta and Mohanty 2008;Jarrahian et al 2012;Kumar et al 2016;Salehi 2009;Standnes and Austad 2000). Pillai et al (2018) investigated the ability of a series of synthetized ionic liquids to alter the wettability of an oil-wet quartz surface. Wettability alteration was achieved by ion-pair formation through the interaction between the positively charged head groups of the ionic liquid and the carboxylic acid groups from crude oil (Pillai et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Pillai et al (2018) investigated the ability of a series of synthetized ionic liquids to alter the wettability of an oil-wet quartz surface. Wettability alteration was achieved by ion-pair formation through the interaction between the positively charged head groups of the ionic liquid and the carboxylic acid groups from crude oil (Pillai et al 2018). Adsorption of non-ionic surfactant on the rock surface through the polarization of p electrons and ion exchange releases stearic acid from the surface.…”

Section: Introductionmentioning

confidence: 99%

Novel application of PEG/SDS interaction as a wettability modifier of hydrophobic carbonate surfaces

et al. 2018

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Wettability alteration of carbonate reservoirs from oil-wet to water-wet is an important method to increase the efficiency of oil recovery. Interaction between surfactants and polymers can enhance the effectiveness of surfactants in EOR applications. In this study, the interaction of polyethylene glycol (PEG) with an ionic surfactant, sodium dodecyl sulphate (SDS), is evaluated on an oil-wet carbonate rock surface by using contact angle measurements. The results reveal that wettability alteration of carbonate rocks is achieved through PEG/SDS interaction on the rock surface above a critical aggregation concentration (CAC). The behaviour of PEG/SDS aqueous solutions is evaluated using surface and interfacial tension measurements. Furthermore, the effect of PEG and SDS concentrations and impact of electrolyte addition on PEG/SDS interaction are investigated. It is shown that electrolyte (NaCl) can effectively decrease the CAC values and accordingly initiate the wettability alteration of rocks. Moreover, in a constant SDS concentration, the addition of NaCl leads to a reduction in the contact angle, which can also be obtained by increasing the aging time, temperature and pre-adsorption of PEG on the rock surface.

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“…Due to the amphiphilic structure, the surfactant can effectively reduce the water/oil interfacial tension (IFT) and change the formation wettability, which are the basic mechanisms of surfactant flooding in chemical enhanced oil recovery (EOR) (Zhang et al, ). Focused on the properties of reservoir water (salinity, temperature, viscosity, and so on), many groups modified the surfactant structures to develop their performances in EOR (Ahmadi and Shadizadeh, ; Babu et al, ; Chaturvedi et al, ; Cui et al, ; Hezave et al, ; Jia et al, ; Kamal, ; Kumar and Mandal, , ; Nguele et al, ; Pal et al, ; Pillai et al, , ; Rodríguez‐Escontrela et al, , b; Saxena et al, ; Zendehboudi et al, ; Zheng et al, ; Zhou et al, , ). Cui et al synthesized zwitterionic surfactants with double long alkyl chains to achieve the optimal hydrophile–lipophile balance for the remarkable IFT reduction (Cui et al, ).…”

Section: Introductionmentioning

confidence: 99%

“…Soto's and our group investigated the interfacial activity of surface‐active ionic liquids at the water/oil interface (Babu et al, ; Rodríguez‐Escontrela et al, ; Zhou et al, , ). Mandal et al evaluated the performances of various surfactants (anionic, nonionic, zwitterionic, and Gemini surfactants) for their potential application in EOR (Chaturvedi et al, ; Kumar and Mandal, , ; Pal et al, ; Pillai et al, , ; Saxena et al, ). Recently, a promising and facile approach to fabricate desired surfactants via noncovalent interactions was proposed in supramolecular chemistry (Mali et al, ; Zhang and Wang, ).…”

Section: Introductionmentioning

confidence: 99%

Effects of Divalent Salts on the Interfacial Activity of the Mixed Surfactants at the Water/Model Oil Interface

Jia

Han

et al. 2019

J Surfact & Detergents

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In our previous report, the mixed cationic/anionic surfactant system consisting of N‐dodecyl‐N‐methylpyrrolidinium bromide (L12) and sodium dodecyl sulfate (SDS) showed good interfacial tension (IFT) reduction of water/model oil (Vtoluene:V n‐decane = 1:1). In the present study, the effects of divalent salts (MgCl2 or CaCl2) on the interfacial activity were systematically evaluated. The additional Mg2+ ions greatly reduced the IFT to an ultralow value, whereas Ca2+ ions caused the generation of the precipitates and resulted in increased IFT values. The precipitates disappeared in binary divalent salt solutions, and the IFT values remained at a low level. Based on the valence, polarizability, and hydrated radius of the ions, we proposed a model to explain the abnormal changes. The effects of NaCl and temperature were investigated to further verify our proposed mechanism. Moreover, the additional divalent salts obviously enhanced the stability of L12/SDS stabilized emulsions.

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Mechanistic studies of enhanced oil recovery by imidazolium-based ionic liquids as novel surfactants

Cited by 162 publications

References 39 publications

Temperature effect on performance of nanoparticle/surfactant flooding in enhanced heavy oil recovery

Temperature effect on performance of nanoparticle/surfactant flooding in enhanced heavy oil recovery

Novel application of PEG/SDS interaction as a wettability modifier of hydrophobic carbonate surfaces

Effects of Divalent Salts on the Interfacial Activity of the Mixed Surfactants at the Water/Model Oil Interface

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