Effect of organic alkali on interfacial tensions of surfactant solutions against crude oils

Yuan, Fuqing; Cheng, Yang; Wang, Hongyan; Xu, Zhicheng; Zhang, Lei; Zhang, Lu; Zhao, Suoqi

doi:10.1016/j.colsurfa.2015.01.059

Cited by 28 publications

(13 citation statements)

References 23 publications

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“…At some pHs the Cp value of the acid-salt mixture will match the HLD = 0 condition to attain a low interfacial tension, i.e., an optimum formulation, with low tension and eventually three-phase behavior. In practice, an aqueous solution containing NaOH, Na 2 CO 3 , or another alkaline product [217][218][219][220] is injected so that the pH is increased along a scan, and at some point the pH corresponds to an optimum formulation. In practice, this effect decreases the Cp MIX value, and a WII [ WIII [ WI transition takes place.…”

Section: Double Optimum Formulation Occurrence Produced By An Increasmentioning

confidence: 99%

How to Attain Ultralow Interfacial Tension and Three‐Phase Behavior with Surfactant Formulation for Enhanced Oil Recovery: A Review. Part 4: Robustness of the Optimum Formulation Zone Through the Insensibility to Some Variables and the Occurrence of Complex Artifacts

Salager

Antón

Arandia

et al. 2017

J Surfact & Detergents

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In enhanced oil recovery, not only the low‐tension performance, but also the robustness at optimum formulation is an important issue. The fourth part of our review series is dedicated to robustness, defined as the width of the zone exhibiting three‐phase behavior around the optimum formulation, whatever the scanned variable. It is first corroborated from a screening of the available data in the literature that the tension minimum is inversely proportional to the square of the three‐phase range in the HLD scale. However, since there is still an inaccuracy of about a factor 10 in the tension minimum, some significant improvement can be attained in some cases by increasing the three‐phase behavior width in two ways. The first approach consists of finding systems that are insensitive to some formulation variable such as temperature, surfactant mixture composition or concentration, and water‐to‐oil ratio. The second way is to produce an artifact through which the optimum formulation is produced twice in a scan. If the distance between the two events in the scan is reduced down to be zero, their corresponding three‐phase behavior zones merge and result in a wider WIII region with a low tension. Several cases of such events are reported: alkaline scans, anionic‐nonionic and anionic‐cationic mixture changes, linear change in composition in three‐surfactant mixture, partial precipitation from a surfactant mixture in a salinity scan, and excessive partitioning of polyethoxylated nonionics. More complex transitions with three effects in a single scan or three concomitantly scanned variables show even more possibilities in practice.

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Section: Double Optimum Formulation Occurrence Produced By An Increasmentioning

confidence: 99%

How to Attain Ultralow Interfacial Tension and Three‐Phase Behavior with Surfactant Formulation for Enhanced Oil Recovery: A Review. Part 4: Robustness of the Optimum Formulation Zone Through the Insensibility to Some Variables and the Occurrence of Complex Artifacts

Salager

Antón

Arandia

et al. 2017

J Surfact & Detergents

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“…Primary recovery depends only on reservoir pressure, while secondary recovery involves water and immiscible gas injection (Aguiar & Mansur, 2016). Since, during extraction, two thirds of oil remains inside the reservoir, even after both the primary and secondary recoveries (Lu et al, 2014; Yuan et al, 2015), the use of enhanced oil recovery (EOR) method becomes necessary to maximize production.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Petrophysical Analysis of Synthetic Sandstone for Enhanced Oil Recovery Applications

Costa

Neto

Oliveira

et al. 2017

BJPG

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The present work aims to develop a methodology for the preparation of synthetic sandstone to be used in enhanced oil recovery (EOR) studies. It also analyzes synthetic sandstone's properties. A 2³ factorial planning with central point in triplicate was performed, evaluating parameters such as concentration of ceramic clay, compaction pressure and sintering temperature through porosity, permeability, and uniaxial compression strength. The sandstone produced presented porosity and permeability similar to those found in natural rocks, which make them suitable for use in EOR research.

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“…However, after primary (relying on the original reservoir energy) and secondary (through water supplement energy) oil recovery, nearly two-thirds of the oil remains in the oil reservoir. The development of enhanced oil recovery (EOR) processes, including water flooding, surfactant flooding, surfactantpolymer flooding, has been widely applied in oil fields [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Interfacial Tensions of Ethoxylated Fatty Acid Methyl Ester Solutions Against Crude Oil

Liu

Fang

Jin

et al. 2017

J Surfact & Detergents

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The dynamic interfacial tension (IFT) of ethoxylated fatty acid methyl ester solutions against n‐alkanes, kerosene, and diluted heavy oil have been investigated by spinning drop interfacial tensiometry. The influences of ethylene oxide (EO) groups and alkyl chain length on IFT were investigated. The experiment results show that the water solubility decreases with an increase in alkyl chain length or a decrease in EO groups. The ability to lower the interfacial tension against hydrocarbons improves with both increasing alkyl chain length and EO group at the best hydrophilic‐lipophilic balance, which can be attributed to the enhancement of the interfacial hydrophobic interactions and the rearrangement of interfacial surfactant molecules. The mixed adsorption of surfactant molecules and surface‐active components may reduce IFT to a lower value. C18=E3 shows the best synergism with surface‐active components. However, the IFT values against pure crude oil are obviously higher than those against hydrocarbons, which may be caused by the nature of heavy oil.

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Effect of organic alkali on interfacial tensions of surfactant solutions against crude oils

Cited by 28 publications

References 23 publications

How to Attain Ultralow Interfacial Tension and Three‐Phase Behavior with Surfactant Formulation for Enhanced Oil Recovery: A Review. Part 4: Robustness of the Optimum Formulation Zone Through the Insensibility to Some Variables and the Occurrence of Complex Artifacts

How to Attain Ultralow Interfacial Tension and Three‐Phase Behavior with Surfactant Formulation for Enhanced Oil Recovery: A Review. Part 4: Robustness of the Optimum Formulation Zone Through the Insensibility to Some Variables and the Occurrence of Complex Artifacts

Mechanical and Petrophysical Analysis of Synthetic Sandstone for Enhanced Oil Recovery Applications

Interfacial Tensions of Ethoxylated Fatty Acid Methyl Ester Solutions Against Crude Oil

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