Relative contribution of wettability Alteration and interfacial tension reduction in EOR: A critical review

Deng, Xiao; Tariq, Zeeshan; Murtaza, Mobeen; Patil, Shirish; Mahmoud, Mohamed

doi:10.1016/j.molliq.2020.115175

Cited by 76 publications

(34 citation statements)

References 112 publications

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“…Reduction of the oil/water interfacial tension (IFT) is one of the most effective ways to improve the Nc value. The efficiency of oil recovery would be greatly enhanced if the IFT value between the displacing aqueous and crude oil attained an ultralow value (<10 −2 mN/m) [6].…”

Section: Introductionmentioning

confidence: 99%

Study on the Synergistic Effects between Petroleum Sulfonate and a Nonionic–Anionic Surfactant for Enhanced Oil Recovery

Luan

Zhou

et al. 2022

Energies

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Nonionic–anionic surfactants are expected to be applied in chemical flooding due to their important properties such as ultralow IFT values, good salt tolerance, and no chromatographic separation in porous media. In this study, a new type of nonionic–anionic–hydrophobic group structure surfactant N,N-dihydroxyethylalkylamide carboxylate (EAMC) was synthesized. The synergistic effects between petroleum sulfonate (KPS) and EAMC in reducing interfacial tension (IFT) and emulsification properties were studied. The influences of salt, alkali and Ca2+ on the IFTs of surfactant solutions were also investigated. One-dimensional core flooding experiments were used to characterize the enhanced oil recovery capability of the KPS and EAMC mixed system. The experimental results show that both EAMC and KPS have high interfacial activity and can reduce IFTs to about 0.01 mN/m order of magnitude against decane at optimized concentrations. The area occupied by the hydrophilic group of EAMC on the interface is smaller than that of its own hydrophobic group. The interfacial film formed by EAMC alone is relatively loose. The IFTs of KPS containing different structure petroleum sulfonates is affected by the difference in the adsorption rate of petroleum sulfonates on the interface, which shows that both the dynamic and equilibrium interfacial tensions can have the lowest values. However, the IFTs of the EAMC solutions against crude oil can be reduced to ultralow values because the mixed tight adsorption film is formed by EAMC and crude oil fraction molecules with synergistic effect. On the other hand, the KPS molecule has a hydrophobic part with large size and no synergism with crude oil fractions can be observed in the solutions containing only KPS. The combination of EAMC and KPS shows synergistic effect, namely ultralow IFT values, good emulsification properties, high alkali tolerance, and good salt and Ca2+ tolerance during a wide percentage range of EAMC. The best formula of EAMC and KPS system can be applied for EOR after polymer flooding. The studies in this paper are helpful for the design and application of a chemical flooding formula with nonionic–anionic–hydrophobic group structure surfactants.

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Section: Introductionmentioning

confidence: 99%

Study on the Synergistic Effects between Petroleum Sulfonate and a Nonionic–Anionic Surfactant for Enhanced Oil Recovery

Luan

Zhou

et al. 2022

Energies

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“…Theoretical and experimental studies have shown that nanofluids generate a structural disjoining pressure needed to remove fluids in contact with rock surfaces by entering spaces between fluids and rock surfaces. − Wedge film structures are subsequently formed on rock surfaces, reducing the adsorption of fluids on the rock surfaces and increasing the relative permeability . Bonding and adsorption or deposition among SiO 2 -fluorinated acrylate polymer nanoemulsions on rock surfaces by van der Waals forces, hydrogen bonding, electrostatic interaction, etc. , alter the micro- or nanostructures and surface chemical composition of rock surfaces and thus change the wettability of the rock surfaces. − Owing to the effect of fluorine chain segments, IFT between a nanoemulsion and crude oil is low and can effectively improve the sweep efficiency of a nanoemulsion. − Liang et al prepared a SiO 2 -fluoropolymer nanofluid with a core–shell structure. After treatment with a 0.10 wt % SiO 2 -fluoropolymer nanofluid, the core wettability changed from amphiphilic to amphiphobic, the core surface free energy decreased from 66.6 to 0.92 mN/m, and the displacement injection equilibrium pressure decreased from 7.0 to 2.0 MPa.…”

Section: Introductionmentioning

confidence: 99%

Preparation of SiO₂-Fluorinated Acrylate Polymer Nanoemulsions (SCFs) and Their Application as Depressurization and Injection Treatment Agents

Qiao

et al. 2022

Energy Fuels

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For water injection development in low-permeability reservoirs, nanoscale SiO2-fluorinated acrylate polymer nanoemulsions (SCFs) with good properties were prepared through core–shell emulsion polymerization. The results show that nano-SiO2 particles are well dispersed, the average particle size of the SCFs is 113 nm, and the synergy among fluoride chain segments is good and effectively improves the utilization of fluorine atoms. SCFs form a low-surface-energy nanoscale hydrophobic film on the rock surface, which changes the original rock surface micro- or nanostructure, resulting in a water contact angle of up to 120° at the core. At 60 °C, the interfacial tension (IFT) between a 1500 mg/L SCF dispersion and white mineral oil is 1.86 mN/m, decreasing by 95.67% relative to the oil–water IFT at room temperature. The core flooding experiment shows that the depressurization rate reaches 29.62% in the 1500 mg/L SCF dispersion. Therefore, SCFs have broad application prospects in processes that eliminate water lock, reduce injection pressure, and increase injection volume.

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“…Contact angle (CA) measurement is a convenient method for wettability assessment [7][8][9][10][11]. It involves three phases: an inert solid phase and two immiscible fluids.…”

Section: Introductionmentioning

confidence: 99%

A Modified Contact Angle Measurement Process to Suppress Oil Drop Spreading and Improve Precision

et al. 2022

Self Cite

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Static contact angle measurement is a widely applied method for wettability assessment. Despite its convenience, it suffers from errors induced by contact angle hysteresis, material heterogeneity, and other factors. This paper discusses the oil drop spreading phenomenon that was frequently observed during contact angle measurements. Experimental tests showed that this phenomenon is closely related to surfactants in the surrounding phase, the remaining oil on the rock surface, and oil inside the surrounding phase. A modified contact angle measurement process was proposed. In the modified method, deionized water was used as the surrounding phase, and a rock surface cleaning step was added. Subsequent measurements showed a very low chance of oil drop spreading and improved precision. A further comparison study showed that, when the surrounding phase was deionized water, the measured contact angle values tended to be closer to intermediate-wet conditions compared to the values measured in clean surfactant solutions. This difference became more significant when the surface was strongly water-wet or strongly oil-wet. As a result, the developed process has two prerequisites: that the in-situ contact angle values inside surfactant solutions are not required, and that the wettability alteration induced by the surfactant solution is irreversible.

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Relative contribution of wettability Alteration and interfacial tension reduction in EOR: A critical review

Cited by 76 publications

References 112 publications

Study on the Synergistic Effects between Petroleum Sulfonate and a Nonionic–Anionic Surfactant for Enhanced Oil Recovery

Study on the Synergistic Effects between Petroleum Sulfonate and a Nonionic–Anionic Surfactant for Enhanced Oil Recovery

Preparation of SiO₂-Fluorinated Acrylate Polymer Nanoemulsions (SCFs) and Their Application as Depressurization and Injection Treatment Agents

A Modified Contact Angle Measurement Process to Suppress Oil Drop Spreading and Improve Precision

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Relative contribution of wettability Alteration and interfacial tension reduction in EOR: A critical review

Cited by 76 publications

References 112 publications

Study on the Synergistic Effects between Petroleum Sulfonate and a Nonionic–Anionic Surfactant for Enhanced Oil Recovery

Study on the Synergistic Effects between Petroleum Sulfonate and a Nonionic–Anionic Surfactant for Enhanced Oil Recovery

Preparation of SiO2-Fluorinated Acrylate Polymer Nanoemulsions (SCFs) and Their Application as Depressurization and Injection Treatment Agents

A Modified Contact Angle Measurement Process to Suppress Oil Drop Spreading and Improve Precision

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Product

Resources

About

Preparation of SiO₂-Fluorinated Acrylate Polymer Nanoemulsions (SCFs) and Their Application as Depressurization and Injection Treatment Agents