Novel Surfactants for Enhanced Oil Recovery

Chowdhury, Satyajit; Srivastava, Saket; Medhi, Srawanti; Sangwai, Jitendra S.

doi:10.1007/978-3-030-70026-3_7

Cited by 4 publications

(5 citation statements)

References 39 publications

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Section: Resultsmentioning

confidence: 99%

“…The dissolution of surfactants in water reduces the interfacial tension between water and crude oil which is a necessary parameter to increase the value of the capillary number. 84 Surfactant molecules get oriented on the surface replacing some of the water molecules and thus a reduction in the hydrophobic regions. At the oil−water interface (immiscible liquids interface), surfactant molecules arrange themselves in a manner that the hydrophilic end in the water and hydrophobic end in the oil reduce the contraction force.…”

Section: Single-stagementioning

confidence: 99%

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Three-Phase Fluid Flow Interaction at Pore Scale during Water- and Surfactant-Alternating Gas (WAG/SAG) Injection Using Carbon Dioxide for Geo-Sequestration and Enhanced Oil Recovery

et al. 2023

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Sequestration of CO2 in geologic formations such as depleted oil reservoirs has emerged as one of the lead solutions to tackle greenhouse gas emissions to reduce pollution and global warming. Supercritical CO2 (sc-CO2) injection in oil reservoirs has proven to be useful as an enhanced oil recovery (EOR) technique along with the benefits of CO2 sequestration. In this study, a tortuous microscopic pore scale model was used to study and investigate the phenomena of water-alternating gas (WAG) and surfactant-alternating gas (SAG) with sc-CO2. The study scrutinizes the dynamics of the pore-level phenomenon in the multiphase WAG and SAG flows at the pore level in detail. Transient computational fluid dynamics (CFD) analysis was used to study the fluid flow characteristics of oil, water, and sc-CO2 at different reservoir pressure and temperature conditions in oil-wet conditions. Governing equations were coupled with EOS (Helmholtz free energy equation) to capture the viscous and intrinsic properties of sc-CO2 due to variations in pressure and temperature conditions. It was found that higher oil recovery does not necessarily indicate higher sc-CO2 sequestration and that temperature harms the displacement mechanism due to unfavorable mobility ratios. Comparing WAG and SAG for the first injection cycle, SAG showed a more diffused interface between displaced and displacing fluid. The additional oil recovery produced in patches was a result of pressure oscillations near the blind pores. Moreover, high vorticity promotes greater intermixing between the displacing and displaced fluid by increasing the rate of interface length. In SAG cases, faster sc-CO2 breakthroughs were observed due to reduced shear stress along the fluid interfaces, which resulted in higher sequestration values in a given time frame. The CO2 sequestration volume in SAG cases was found to be approximately 40% more than in WAG experiments. The study confirms that lower values of oil–water interfacial tension aids in faster and more efficient sequestration of sc-CO2 along with additional oil gain from a given reservoir.

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Section: Resultsmentioning

confidence: 99%

Section: Single-stagementioning

confidence: 99%

Three-Phase Fluid Flow Interaction at Pore Scale during Water- and Surfactant-Alternating Gas (WAG/SAG) Injection Using Carbon Dioxide for Geo-Sequestration and Enhanced Oil Recovery

et al. 2023

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“…All these methods aim to converge toward a single objective, i.e., to increase the ultimate hydrocarbon recovery from the reservoir. 4,5 From a microscopic perspective, pore-scale displacement is a complex phenomenon. The flow in the porous media is dominated by the capillary forces; these forces do not allow the entire oil in contact with the injected fluid to be displaced and produced.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, alkaline flooding increases the pH of the in situ water to increase the trapped oil mobility. All these methods aim to converge toward a single objective, i.e., to increase the ultimate hydrocarbon recovery from the reservoir. , …”

Section: Introductionmentioning

confidence: 99%

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Comprehensive Review on the Role of Surfactants in the Chemical Enhanced Oil Recovery Process

Chowdhury

Shrivastava

Kakati

et al. 2022

Ind. Eng. Chem. Res.

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With a constant upsurge in energy demand, production from depleted and harsh reservoirs through enhanced oil recovery techniques (EOR) has significantly increased. Among many EOR techniques, chemical EOR (cEOR) is one of the most widely used methods of oil extraction. Surfactants used in cEOR are instrumental in reducing interfacial tension (IFT) and altering the wettability of rock, which leads to additional oil recovery. This review draws attention to detail on surfactants from fundamentals to field scale. Properties of surfactants like phase behaviors, critical micelle concentration (CMC), hydrophilic–lipophilic balance and deviation, zeta potential, and their importance are discussed in depth. The presence of a saline environment, polymer, cosurfactant, and other factors affecting the performance of surfactant during the cEOR process are also elaborated. Key findings on surfactant adsorption on reservoir rock with other influencing aspects have also been reported in this study. Types of surfactants, from basic to the likes of polymeric, viscoelastic, Gemini, natural, and their effects on oil recoveries have been analyzed and compared. Special emphasis on emerging aids for surfactant flooding such as applications of nanotechnology, use amphoteric Janus particles, and synergies of surfactant–low salinity water flooding, along with their mechanisms and recent advances have been thoroughly duscussed. Lastly, the review delineates discerning criteria for the selection of surfactants, reviews recent field applications, and outlines the challenges that the industry faces while implementing surfactant cEOR. It has been found that exhaustive studies have been conducted on sandstones with success. However, extreme temperature and saline conditions in the case of carbonate reservoirs limit the applicability of surfactants, and the pursuit to accomplish its efficacy continues.

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Experimental and field applications of nanotechnology for enhanced oil recovery purposes: A review

Davoodi

Al-Shargabi

Wood

et al. 2022

Fuel

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Novel Surfactants for Enhanced Oil Recovery

Cited by 4 publications

References 39 publications

Three-Phase Fluid Flow Interaction at Pore Scale during Water- and Surfactant-Alternating Gas (WAG/SAG) Injection Using Carbon Dioxide for Geo-Sequestration and Enhanced Oil Recovery

Three-Phase Fluid Flow Interaction at Pore Scale during Water- and Surfactant-Alternating Gas (WAG/SAG) Injection Using Carbon Dioxide for Geo-Sequestration and Enhanced Oil Recovery

Comprehensive Review on the Role of Surfactants in the Chemical Enhanced Oil Recovery Process

Experimental and field applications of nanotechnology for enhanced oil recovery purposes: A review

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