Synergism, phase behaviour and characterization of ionic liquid-nonionic surfactant mixture in high salinity environment of oil reservoirs

Nandwani, Shilpa K.; Chakraborty, Mousumi; Bart, Hans‐Jörg; Gupta, Sumanta

doi:10.1016/j.fuel.2018.05.021

Cited by 37 publications

(32 citation statements)

References 28 publications

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“…The core flooding setup has been briefly described in our previous work. 28 The natural calcite powder, having sizes ranging from 200 to 250 mesh, was bought from RMR micro minerals, Jaipur, Rajasthan, India. The X-ray diffraction analysis of the crushed natural carbonate rock has been shown in previous work.…”

Section: Methodsmentioning

confidence: 99%

“…Details of the procedure followed while sample preparation have been described elsewhere. 28 The time required for a ternary phase system containing model oil, brine, and NaOH + SAIL to form a TABLE middle phase microemulsion has been investigated by scanning 5 mL sample solutions using Turbiscan classic MA 2000 (Formulaction, France) which emits light rays of 880 nm wavelength.…”

Section: Methodsmentioning

confidence: 99%

“…As mentioned in our previous work, fast equilibration time (less than 24 h) is desirable and an indication of the formation of a middle phase microemulsion having viscosity in an intermediate range (between excess oil phase and excess water phase) and lacking liquid crystal structure. 28,29 3.5. Core Flooding Experiment.…”

Section: Effect Of Water-to-oil Ratio (Wor)mentioning

confidence: 99%

“…8−17 For applications in enhanced oil recovery (EOR) processes, a few researchers prepared blends of SAIL and conventional surfactants and have reported about their improved interfacial activity and applicability in reservoirs having high salinity formation brine. 18,19,28,29 Most of the conventional surfactants used in surfactant flooding processes require addition of cosurfactants or cosolvents to reduce the IFT between crude oil and water to desirable values, i.e. ∼10 −3 mN/m.…”

Section: Introductionmentioning

confidence: 99%

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A Comprehensive Study Based on the Application of Different Genre of Surface-Active Ionic Liquid and Alkali Combination Systems in Surfactant Flooding

et al. 2020

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In the present study, four surface-active ionic liquids (SAILs) having different head groups (phosphonium, pyridinium, pyrrolidinium, and imidazolium) but the same hydrophobic tail length and same anion attached have been screened for their surface activity and capability in reducing interfacial tension (IFT) between crude oil and water. Effects of increasing NaCl concentration and alkali addition on the IFT between crude oil and SAIL solution have been studied. It is known that alkalis react with naphthenic acid present in the crude oil and form an in situ surfactant. This in situ surfactant when injected with some SAIL further lowers the IFT between crude oil and water. Phase behavior studies have been performed to determine the formation of a WINSOR III phase in ternary systems containing NaOH + SAIL/brine/crude oil or model. To compare the efficiency of NaOH + SAIL combinations over individual SAILs for application in enhanced oil recovery (EOR) processes, five core flooding experiments have been performed. The NaOH + pyrrolidinium/imidazolium-based SAIL lowered IFT to ultralow values at optimal salinity as high as 15 wt % NaCl and thus recovered more oil than the individual SAILs. It can be concluded that some NaOH + SAIL combinations can be used in surfactant-assisted EOR processes in carbonate reservoirs having a high salinity (∼15 wt % NaCl) environment.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Effect Of Water-to-oil Ratio (Wor)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Comprehensive Study Based on the Application of Different Genre of Surface-Active Ionic Liquid and Alkali Combination Systems in Surfactant Flooding

et al. 2020

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“…However, ionic surfactants usually have a higher surface activity and the ability to reduce interfacial tension to ultralow values [18]. Several works reported about the synergy effect and high efficiency of nonionic-ionic blends [19,20], which are preferable for surfactant flooding in reservoirs with high water mineralization, where ionic surfactants effectively decrease IFT, change wettability, and, at the same time, nonionic surfactants can increase the salt tolerance of surfactants' blend.…”

Section: Introductionmentioning

confidence: 99%

Screening of Surfactants for Flooding at High-Mineralization Conditions: Two Production Zones of Carbonate Reservoir

et al. 2022

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The selection of effective surfactants potentially can mobilize oil up to 50% of residuals in mature carbonate oilfields. Surfactants’ screening for such oilfields usually is complicated by the high salinity of water, high lipophilicity of the rock surface, and the heterogeneous structure. A consideration of features of the oilfield properties, as well as separate production zones, can increase the deep insight of surfactants’ influence and increase the effectiveness of surfactant flooding. This article is devoted to the screening of surfactants for two production zones (Bashkirian and Vereian) of the Ivinskoe carbonate oilfield with high water salinity and heterogeneity. The standard core study of both production zones revealed no significant differences in permeability and porosity. On the other hand, an X-ray study of core samples showed differences in their structure and the presence of microporosity in the Bashkirian stage. The effectiveness of four different types of surfactants and surfactant blends were evaluated for both production zones by two different oil displacement mechanisms: spontaneous imbibition and filtration experiments. Results showed the higher effect of surfactants on wettability alteration and imbibition mechanisms for the Bashkirian cores with microporosity and a higher oil displacement factor in the flooding experiments for the Vereian homogeneous cores with lower oil viscosity.

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Applications of ionic liquids as green solvents in enhanced oil recovery

Bera

2023

Green Sustainable Process for Chemical and Environmental Engineering and Science

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Synergism, phase behaviour and characterization of ionic liquid-nonionic surfactant mixture in high salinity environment of oil reservoirs

Cited by 37 publications

References 28 publications

A Comprehensive Study Based on the Application of Different Genre of Surface-Active Ionic Liquid and Alkali Combination Systems in Surfactant Flooding

A Comprehensive Study Based on the Application of Different Genre of Surface-Active Ionic Liquid and Alkali Combination Systems in Surfactant Flooding

Screening of Surfactants for Flooding at High-Mineralization Conditions: Two Production Zones of Carbonate Reservoir

Applications of ionic liquids as green solvents in enhanced oil recovery

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