New surfactant classes for enhanced oil recovery and their tertiary oil recovery potential

Iglauer, Stefan; Wu, Yongfu; Shuler, Patrick; Tang, Yongchun; Goddard, William A.

doi:10.1016/j.petrol.2009.12.009

Cited by 284 publications

(153 citation statements)

References 30 publications

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“…A more recent study reported that the price of biosurfactants ranges between US$ 2 and 3 per kg (Hazra et al 2011). It was reported that the reduction in interfacial tension (IFT) by the surfactants has to be ultra low, where the IFT values should be in the range of 10 3 mN/m, to enhance oil recovery by increasing the capillary number (Aoudia et al 2006;Curbelo et al 2007;Zhu et al 2009;Iglauer et al 2010;Lu et al 2014a, c, d). Although the minimum IFT value obtained by the biosurfactant in this study is not ultra low, other recovery mechanisms are expected to take place.…”

Section: Introductionmentioning

confidence: 99%

Injection of biosurfactant and chemical surfactant following hot water injection to enhance heavy oil recovery

et al. 2015

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This study investigates the potential of enhancing oil recovery from a Middle East heavy oil field via hot water injection followed by injection of a chemical surfactant and/or a biosurfactant produced by a Bacillus subtilis strain which was isolated from oil-contaminated soil. The results reveal that the biosurfactant and the chemical surfactant reduced the residual oil saturation after a hot water flood. Moreover, it was found that the performance of the biosurfactant increased by mixing it with the chemical surfactant. It is expected that the structure of the biosurfactant used in this study was changed when mixed with the chemical surfactant as a probable synergetic effect of biosurfactant-chemical surfactants was observed on enhancing oil recovery, when used as a mixture, rather than alone. This work proved that it is more feasible to inject the biosurfactant as a blend with the chemical surfactant, at the tertiary recovery stage. This might be attributed to the fact that in the secondary mode, improvement of the macroscopic sweep efficiency is important, whereas in the tertiary recovery mode, the microscopic sweep efficiency matters mainly and it is improved by the biosurfactantchemical surfactant mixture. Also as evidenced by this study, the biosurfactant worked better than the chemical surfactant in reducing the residual heavy oil saturation after a hot water flood.

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Section: Introductionmentioning

confidence: 99%

Injection of biosurfactant and chemical surfactant following hot water injection to enhance heavy oil recovery

et al. 2015

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“…Consequently, many thriving CEOR projects have been reported worldwide. Although there is no doubt about the inherent efficiency of CEOR techniques [20][21][22][23], several issues have threaten its successful application in unconventional resources, such as high price of chemicals, harsh condition of oilfields, and possible formation damage.…”

Section: The Advantages Of Microemulsion Floodingmentioning

confidence: 99%

Multi-Objective Optimization of Microemulsion Flooding for Chemical Enhanced Oil Recovery

Karambeigi

Asl

Nasiri

2018

Oil & Gas Science and Technology - Rev. IFP Energies nouvel

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-Microemulsion flooding is one of the most effective methods of Chemical Enhanced Oil Recovery (CEOR), particularly for the production of residual oil trapped in unconventional reservoirs. A critical step for successful application of this technique is to achieve a suitable formulation. Previous studies have almost focused on the technical aspects while considering both practical and economic matters as conflicting objectives have been neglected. In the present paper, the formulation of microemulsion is optimized based on the trade-off between scientific and financial responses using a hybrid workflow in which experimental design and artificial intelligence methodologies are composed. To appraise the efficiency of developed algorithm, a challenge case study is first evaluated and compared to previous approaches. Thereafter, the second case is examined in which a newly developed formulation of microemulsion for high temperature carbonate reservoirs is optimized. The outcomes of this multi-attribute workflow are compared to a single-objective algorithm. The results indicate the outstanding performance of the proposed approach for multi-objective optimization of microemulsion formulation. Eventually, the possible concerns regarding the application of microemulsion flooding in unconventional reservoirs are discussed.

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“…Si embargo, el anión HPO 4 = no produce un marcado efecto salting out, esto puede ser atribuido a que este es el anión que posee el radio iónico más grande (5,24 Å), consecuentemente posee el radio de hidratación más pequeño (0,0364Å) por lo tanto este producirá un menor efecto de desolvatación de la parte polar del anfifílo (RCOO -), permitiendo que los iones carboxilato permanezcan en solución acuosa, estabilizados por los puentes de hidrógeno con las moléculas de agua o por la formación de dímeros entre moléculas de carboxilato/ácido caboxílico. 15 El coeficiente de reparto se ve afectado por los electrolitos añadidos, ya que estos modificaran la CMC, las propiedades de los agregados, el tamaño y la forma de estos y la estabilidad de las fases.…”

Section: Figura 1 Comportamiento De Fases Para Sistemas Acg/n-heptanunclassified

“…3 La capacidad de éstos ácidos para actuar como surfactantes y estabilizar emulsiones depende de su capacidad para adsorberse en una interfase, reducir en gran medida la tensión interfacial y formar una película adhesiva. 4 La doble compatibilidad de estos compuestos les otorga ciertas propiedades muy interesantes y bastante útiles; en primer lugar, la ubicación preferencial en las superficies de los líquidos o en las interfases de compuestos no compatibles, por lo que sirven de puente entre ellas y facilitan su dispersión. En segundo lugar, la ubicación de las moléculas hace que disminuya la energía de superficie del sistema, modificando de esta forma la tensión interfacial en sistemas conformados por líquidos inmiscibles.…”

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Estudio del coeficiente de reparto de ácidos carboxílicos grasos en sistemas modificados heptano/agua

et al. 2012

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Recebido em 9/11/11; aceito em 31/1/12; publicado na web em 30/4/12 STUDY OF THE PARTITION COEFFICIENT OF FATTY CARBOXYLIC ACIDS IN MODIFIED HEPTANE/WATER SYSTEMS. The use of fatty acids (FAs) as amphiphiles is very important because they have a behaving similar to surfactants. The formulation for the preferential partition of these species was studied by varying the amount of salt at constant acid concentration. As the salt concentration increases, a Winsor I→III→II transition is observed for all the systems studied. Furthermore, the electrolyte concentration required to obtain the optimum formulation varies inversely with the chain length of the acid. The partition coefficient of the surfactant allows one to obtain thermodynamic information on the acid transfer process between the phases of the system. Keywords: fatty acids; formulation variables; partition coefficient. INTRODUCCIÓNEn la actualidad el empleo de sustancias anfifilicas juega un papel fundamental en diversos procesos industriales, como por ejemplo en la recuperación del petróleo, en la formulación de espumas, en estudios de estabilidad de diferentes emulsiones y microemulsiones entre otros; 1,2 en este sentido los ácidos carboxílicos grasos (ACG) naturales, así como los sintéticos, son una fuente importante de materia prima que pueden emplearse como surfactantes. 3 La capacidad de éstos ácidos para actuar como surfactantes y estabilizar emulsiones depende de su capacidad para adsorberse en una interfase, reducir en gran medida la tensión interfacial y formar una película adhesiva. 4 La doble compatibilidad de estos compuestos les otorga ciertas propiedades muy interesantes y bastante útiles; en primer lugar, la ubicación preferencial en las superficies de los líquidos o en las interfases de compuestos no compatibles, por lo que sirven de puente entre ellas y facilitan su dispersión. En segundo lugar, la ubicación de las moléculas hace que disminuya la energía de superficie del sistema, modificando de esta forma la tensión interfacial en sistemas conformados por líquidos inmiscibles. 5,6 En un sistema agua-hidrocarburo puede ocurrir un reparto de las especies anfifílicas entre las fases del sistema, por lo que es importante su determinación y cuantificación en cada fase; ya que, estas especies son las responsables de la disminución de la tensión interfacial. 2,3,5,[7][8][9][10][11][12][13] Este reparto preferencial es afectado por las variables de formulación en el sistema (electrolitos, alcoholes, etc.), por lo que en este trabajo se evaluó el efecto que causa la adición de diferentes electrolitos en el coeficiente de reparto de los ACG. PARTE EXPERIMENTAL EquiposPara la cuantificación del ACG en cada fase se empleó un cromatógrafo líquido de alta eficiencia (CLAE) tipo modular marca Waters, conformado por: un inyector universal U6K; bomba modelo 510, detector UV-VIS modelo 484 de longitud de onda variable, una interfase PE-Nelson modelo 900 series marca Perkin Elmer y un computador PC 5500 con software Turbochrome para el procesamiento de los da...

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New surfactant classes for enhanced oil recovery and their tertiary oil recovery potential

Cited by 284 publications

References 30 publications

Injection of biosurfactant and chemical surfactant following hot water injection to enhance heavy oil recovery

Injection of biosurfactant and chemical surfactant following hot water injection to enhance heavy oil recovery

Multi-Objective Optimization of Microemulsion Flooding for Chemical Enhanced Oil Recovery

Estudio del coeficiente de reparto de ácidos carboxílicos grasos en sistemas modificados heptano/agua

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