Ultra-Low Interfacial Tension and Its Implications in Tertiary Oil Recovery

Morgan, James C.; Schechter, R.S.; Wade, William H.

doi:10.1007/978-1-4615-7883-3_13

Cited by 3 publications

(2 citation statements)

References 58 publications

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“…69 defines the state of minimum 1FT. 3,4 If Eq. 69 is attained from the scan of brine salinity for a series of microemulsions, as described in the Introduction, the salinity of Eq.…”

Section: Ec>s For Surfactant Layer At Interfacementioning

confidence: 99%

Equilibrium of a Microemulsion That Coexists With Oil or Brine

Huh

1983

Society of Petroleum Engineers Journal

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Ab~tractWhen salinity, or an equivalent variable, is increased, microemulsions generally undergo orderly transitions from a lower-to middle-to upper-phase. Even though the Isignificance of such multi phase behavior has been well recognized in the design of surfactant flood processes, their quantitative nature in tenns of the molecular structures of the surfactant lipophile, hydrophile, and the oil and brine salinity has not been fully understood. A theory of lower-and upper-phase microemulsions that gives reasonable predictions of their interfacial tensions (1FT's) and phase behavior is presented. In the theory, the isurfactant monomers adsorbed at oil/brine interface cause the interface to bend as a result of an imbalance between the hydrophile/brine interaction on the one hand andllipophile/oil interaction on the other. With sufficient imbalance, high local curvature causes small drops of onelphase to disperse into the other. In addition, interactionis between these drops are taken into account for the microemulsion equilibrium. The theory also offers a possibility of being able to describe the hydrophile/ lipophile-balanced state (optimal salinity state of Healy andl Reed \ ) in tenns of the tendency of surfactant layer at the !oil/brine interface to bend. ,

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“…69 defines the state of minimum 1FT. 3,4 If Eq. 69 is attained from the scan of brine salinity for a series of microemulsions, as described in the Introduction, the salinity of Eq.…”

Section: Ec>s For Surfactant Layer At Interfacementioning

confidence: 99%

Equilibrium of a Microemulsion That Coexists With Oil or Brine

Huh

1983

Society of Petroleum Engineers Journal

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“…Surfactant flooding is a chemical enhanced oil recovery (EOR) process, which is considered to be highly effective in mobilizing and displacing immobile oil trapped in the porous rock due to capillary forces. Surfactants work by reducing the interfacial tension (IFT) between oil and water from approximately 30 mN/m to ultralow values 10 −2 mN/m or less [1][2][3][4][5][6]. However, during surfactant flooding through porous media, adsorption, precipitation, and chromatographic separation of surfactant species normally occur.…”

Section: Introductionmentioning

confidence: 99%

Complexation of Surfactant/β‐Cyclodextrin to Inhibit Surfactant Adsorption onto Sand, Kaolin, and Shale for Applications in Enhanced Oil Recovery Processes. Part II: Dynamic Adsorption Analysis

Kittisrisawai

Romero‐Zerón

2015

J Surfact & Detergents

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Surfactant adsorption onto solid surfaces is problematic in some industrial processes, such as in surfactant flooding for enhanced oil recovery. In this work, it was hypothesized that the use of a surfactant delivery system could prevent surfactant adsorption onto solid surfaces. Therefore, the encapsulation of sodium dodecyl sulfate (SDS) into the hydrophobic core of β-cyclodextrin (β-CD) to generate a surfactant delivery system (SDS/ β-CD) was evaluated in this work. This complexation was characterized using optical and scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FT-IR). Dynamic adsorption evaluation was applied to determine the effectiveness of the complexation in inhibiting surfactant adsorption onto a variety of solid adsorbents including sand, and mixtures of sand-kaolin and sand-shale. Surfactant adsorption was also evaluated applying the quartz crystal microbalance technology (QCM-D). The formation and morphology of the complexation was confirmed by optical microscopy, SEM, and FT-IR. Dynamic adsorption tests demonstrated the effectiveness of the surfactant delivery approach in preventing the adsorption of surfactant (up to 74 % adsorption reduction). The QCM-D technology confirmed these observations. Several mechanisms were proposed to explain the inhibition of surfactant adsorption including steric hindrance, self-association of inclusion complexes, hydrophilicity increase, and disruption of hemimicelles formation.

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Microemulsions: A Contemporary Overview

Holt

1980

Journal of Dispersion Science and Technology

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Ultra-Low Interfacial Tension and Its Implications in Tertiary Oil Recovery

Cited by 3 publications

References 58 publications

Equilibrium of a Microemulsion That Coexists With Oil or Brine

Equilibrium of a Microemulsion That Coexists With Oil or Brine

Complexation of Surfactant/β‐Cyclodextrin to Inhibit Surfactant Adsorption onto Sand, Kaolin, and Shale for Applications in Enhanced Oil Recovery Processes. Part II: Dynamic Adsorption Analysis

Microemulsions: A Contemporary Overview

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