Effect of alcohol-treated CO2 on interfacial tension between CO2 and oil, and oil swelling

Saira, Saira; Yin, Houfa; Le-Hussain, Furqan

doi:10.46690/ager.2021.04.06

Cited by 12 publications

(3 citation statements)

References 47 publications

(91 reference statements)

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“…Therefore, the extraction capacity of CO 2 for intermediate hydrocarbons can be increased by increasing the content of light hydrocarbons [22][23][24]. Low-carbon alcohols can dissolve in both supercritical CO 2 and crude oil, reducing the interfacial tension between the two while increasing the viscosity and density of CO 2 , thereby enhancing the dissolution of CO 2 in crude oil [25,26]. Toll oil, composed mainly of fatty acids, resins, and sterols in a ratio of 5:4:1, can dissolve well in both crude oil and CO 2 , increasing the viscosity of supercritical CO 2 and reducing the polarity of crude oil-CO 2 , thus facilitating the formation of a single phase [27].…”

Section: Introductionmentioning

confidence: 99%

Effect of Tributyl Citrate as a Cosolvent on the Phase Behavior of Crude Oil during CO2 Injection Process

Xue,

Yang,

et al. 2024

Energies

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The current research on CO2 cosolvent primarily focuses on reducing the minimum miscibility pressure and improving oil recovery. However, investigations into the impact of additive agents on the phase behavior of crude oil during the CO2 injection process are relatively limited. In this study, we introduced tributyl citrate as a cosolvent to the CO2 injection process. By comparing the phase parameters of crude oil and changes in component composition in the residual oil before and after the addition of tributyl citrate, we explored the influence patterns of this cosolvent during CO2 injection. The experiments show that the optimum concentration of tributyl citrate is 0.3%. After the addition of tributyl citrate, the bubble point pressure of crude oil is reduced from 14.28 MPa to 13.36 MPa, and the density is decreased from 1.00 g/cm3 to 0.95 g/cm3. These alterations of bubble point pressure and density indicate an enhanced solubility of CO2 and improved miscibility with the oil, coinciding with an increased volume expansion coefficient rising from 1.12 to 1.18 under 20 MPa and a decrease in viscosity from 0.73 mPa·s to 0.64 mPa·s. Tributyl citrate primarily affects the properties of crude oil by reducing interfacial tension and the content of heavy components in the dissolution system. The addition of tributyl citrate stabilizes the deposition trend of heavy components in crude oil and promotes the transformation of heavy components into light components, thereby enhancing the efficiency of CO2 extraction. This study provides valuable insights into a novel and simple method to further increase oil recovery in the CO2 injection process.

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Section: Introductionmentioning

confidence: 99%

Effect of Tributyl Citrate as a Cosolvent on the Phase Behavior of Crude Oil during CO2 Injection Process

Xue,

Yang,

et al. 2024

Energies

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“…The main mechanism of surfactants to increase oil production is interfacial tension (IFT) reduction. 1 In some cases, the surfactants have shown their ability to alter the wettability of reservoir rock. 2 In terms of surfactant types, they are typically divided into two categories: synthetic and natural surfactants.…”

Section: Introductionmentioning

confidence: 99%

“…The main mechanism of surfactants to increase oil production is interfacial tension (IFT) reduction . In some cases, the surfactants have shown their ability to alter the wettability of reservoir rock .…”

Section: Introductionmentioning

confidence: 99%

Synergistic Efficiency of Zinc Oxide/Montmorillonite Nanocomposites and a New Derived Saponin in Liquid/Liquid/Solid Interface-Included Systems: Application in Nanotechnology-Assisted Enhanced Oil Recovery

et al. 2022

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Oil production faces challenges such as limited oil production from carbonate reservoirs, high oil production costs, and environmental issues. Chemical flooding as an enhanced oil recovery (EOR) method (CEOR) can increase oil production by the use of chemical additives such as surfactants into the reservoirs. Surfactants can increase oil recovery by interfacial tension (IFT) reduction and alteration of the rock wettability from oil-wet to water-wet. The synthesis of chemicals such as synthetic surfactants is usually costly and harmful to the environment. To solve these problems, many researchers have oriented on the use of natural surfactants instead of synthetic ones within the CEOR process. A new approach to increase the efficiency of CEOR is the synergizing of the chemical additives with nanoparticles as a hybrid fluid, which is known as the nanotechnology-assisted EOR method. In this research, a natural surfactant derived from Cyclamen persicum (CP) plant was extracted, and its performance was optimized with the zinc oxide/montmorillonite (ZnO/MMT) nanocomposite in a synergistic usage. At the optimum concentration of the surfactant, the measurements of the IFT and the contact angle show 57.78 and 61.58% optimizations, respectively. Also, in the presence of NaCl, the performance of CP is improved. IFT and contact angle measurements were also conducted for ZnO/MMT nanofluids and CP-ZnO/MMT as hybrid nanofluids. Results indicate that ZnO/MMT nanocomposites can alter the wettability of the carbonate rock to the water-wet state. Also, the CP-ZnO/MMT hybrid nanofluid shows a good potential in both IFT reduction and altering wettability from oil-wet to water-wet. Finally, to investigate the effects of solutions on increasing oil recovery factor (RF), the optimum concentrations of the surfactant, nanocomposite, and hybrid solutions were selected for dynamic core flooding experiments, and improvements showed oil RF increases of 8.2, 6, and 13%, respectively.

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Effects of CO2-philic nonionic polyether surfactants on miscibility behaviors of CO2–hydrocarbon systems: Experimental and simulation approach

Dong

Sarma

et al. 2023

Chemical Engineering Journal

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Effect of alcohol-treated CO2 on interfacial tension between CO2 and oil, and oil swelling

Cited by 12 publications

References 47 publications

Effect of Tributyl Citrate as a Cosolvent on the Phase Behavior of Crude Oil during CO2 Injection Process

Effect of Tributyl Citrate as a Cosolvent on the Phase Behavior of Crude Oil during CO2 Injection Process

Synergistic Efficiency of Zinc Oxide/Montmorillonite Nanocomposites and a New Derived Saponin in Liquid/Liquid/Solid Interface-Included Systems: Application in Nanotechnology-Assisted Enhanced Oil Recovery

Effects of CO2-philic nonionic polyether surfactants on miscibility behaviors of CO2–hydrocarbon systems: Experimental and simulation approach

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