Optimum Formulation of Surfactant/Water/Oil Systems for Minimum Interfacial Tension or Phase Behavior

Salager, Jean‐Louis; Morgan, James C.; Schechter, R.S.; Wade, William H.; Vasquez, E.

doi:10.2118/7054-pa

Cited by 481 publications

(456 citation statements)

References 12 publications

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“…The mole fraction weighted of hydrocarbon EACN (Eq. 3) as proposed by Cayias et al [25] and Cash et al [26] has been widely used to estimate the EACN mix of heavy hydrocarbon mixtures, at atmospheric pressure [6,15,[27][28][29].…”

Section: Theoretical Sectionmentioning

confidence: 99%

“…The temperature affects the microemulsion phase behavior, and increasing T results in increasing S* (Eq. 1) for ionic surfactants while the opposite trend is observed in the case of nonionic surfactants [6,17]. Since the work early proposed by Nelson [18], various references reported that microemulsion phase behavior is only slightly influenced by the pressure as compared to temperature effect [12,[19][20][21][22][23], and that an increase of P may lead to a Winsor II ?…”

Section: Introductionmentioning

confidence: 98%

“…While advanced methods have been recently proposed to speed up ASP formulation procedure [4,5], the HydrophilicLipophilic Deviation (HLD) concept, as proposed by Salager et al [6], is still the keystone of numerous studies [1,7]. At HLD = 0, the Salager relation (Eq.…”

Section: Introductionmentioning

confidence: 99%

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Equivalent Alkane Carbon Number of Live Crude Oil: A Predictive Model Based on Thermodynamics

Creton

Mougin

2016

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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-We took advantage of recently published works and new experimental data to propose a model for the prediction of the Equivalent Alkane Carbon Number of live crude oil (EACNlo) for EOR processes. The model necessitates the a priori knowledge of reservoir pressure and temperature conditions as well as the initial gas to oil ratio. Additionally, some required volumetric properties for hydrocarbons were predicted using an equation of state. The model has been validated both on our own experimental data and data from the literature. These various case studies cover broad ranges of conditions in terms of API gravity index, gas to oil ratio, reservoir pressure and temperature, and composition of representative gas. The predicted EACNlo values reasonably agree with experimental EACN values, i.e. determined by comparison with salinity scans for a series of n-alkanes from nC 8 to nC 18 . The model has been used to generate high pressure high temperature data, showing competing effects of the gas to oil ratio, pressure and temperature. The proposed model allows to strongly narrow down the spectrum of possibilities in terms of EACNlo values, and thus a more rational use of equipments.Résumé -Développement d'un modèle pour prédire l'alcane équivalent d'une huile vive -En se basant sur de récents travaux de la littérature ainsi que sur de nouvelles données expérimentales, nous proposons un modèle permettant de prédire l'EACNlo (Equivalent Alkane Carbon Number of live crude oil) -alcane équivalent d'une huile vive (pétrole brut contenant des gaz dissous) -dans des contextes de recherche de tensioactifs pour des activités EOR. Pour mettre en oeuvre ce modèle, il faut s'assurer de la connaissance des conditions de pression et de température dans le réservoir et du rapport gaz sur huile. En outre, des propriétés volumétriques d'hydrocarbures nécessaires pour alimenter le modèle, sont estimées par l'utilisation d'équations d'état. La validation de notre modèle a été réalisée à partir de données expérimentales de la littérature et nos propres données obtenues pour des pétroles bruts. Ces différents cas d'études couvrent de larges gammes en termes de degrés API, de rapports gaz sur huile, de pressions et températures en condition de fond (réservoir) et de compositions pour le gaz représentatif. L'utilisation du modèle conduit à des valeurs d'EACNlo en accord avec les valeurs expérimentales, i.e. obtenues par comparaisons avec des analyses de salinités sur des séries d'alcanes linéaires de nC 8 à nC 18 . Le modèle a ensuite été utilisé pour générer des prédictions et ainsi étudier l'impact sur les prédictions des conditions de pressions et de températures et de la nature du gaz. Le modèle permet de restreindre la gamme de valeurs d'EACNlo et ainsi une meilleure utilisation des équipements expérimentaux.

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Section: Theoretical Sectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

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Equivalent Alkane Carbon Number of Live Crude Oil: A Predictive Model Based on Thermodynamics

Creton

Mougin

2016

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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“…The surfactant may precipitate as hydrated crystals if φ is low [83]. In the most general case, high salt concentrations favor the formation of a separate surfactant-rich middle phase, or even the transfer of the surfactant to the oil phase in the form of inverse swollen micelles [84,85,86,87]. The region of compositions for which a three-phase system exists at equilibrium is known as the balance zone.…”

Section: Flocculation Of Oil Dropsmentioning

confidence: 99%

Nanoemulsion stability: Experimental evaluation of the flocculation rate from turbidity measurements

Rahn-Chique¹,

Puertas²,

Romero-Cano³

et al. 2012

Advances in Colloid and Interface Science

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The coalescence of liquid drops induces a higher level of complexity compared to the classical studies about the aggregation of solid spheres. Yet, it is commonly believed that most findings on solid dispersions are directly applicable to liquid mixtures. Here, the state of the art in the evaluation of the flocculation rate of these two systems is reviewed. Special emphasis is made on the differences between suspensions and emulsions. In the case of suspensions, the stability ratio is commonly evaluated from the initial slope of the absorbance as a function of time under diffusive and reactive conditions. Puertas and de las Nieves (1997) developed a theoretical approach that allows the determination of the flocculation rate from the variation of the turbidity of a sample as a function of time. Here, suitable modifications of the experimental procedure and the referred theoretical approach are implemented in order to calculate the values of the stability ratio and the flocculation rate corresponding to a dodecane-in-water nanoemulsion stabilized with sodium dodecyl sulfate. Four analytical expressions of the turbidity are tested, basically differing in the optical cross section of the aggregates formed. The first two models consider the processes of: a) aggregation (as described by Smoluchowski) and b) the instantaneous coalescence upon flocculation. The other two models account for the simultaneous occurrence of flocculation and coalescence. The latter reproduce the temporal variation of the turbidity in all cases studied (380 ≤ [NaCl] ≤ 600 mM), providing a method of appraisal of the flocculation rate in nanoemulsions.

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“…These factors include the surfactant types (Hayes et al, 1979), chemistry (Enedy et al, 1982;Hirasaki et al, 1983;Krumrine et al, 1982), phase behavior (Glover et al, 1979;Novosad, 1982), chemicals adsorption (Austad et al, 1997), surfactant precipitation and redissolution (Somasundaran et al, 1984), chromatographic separation of chemicals (Li et al, 2009), surfactant convection (Ramirez et al, 1980), surfactant stability (Handy et al, 1982), chemicals loss (Friedmann, 1986), dispersion (Hirasaki, 1981), surfactant systems formulation (Salager et al, 1979), wettability , reservoir rock structure and morphology (Dullien et al, 1972;Yadali Jamaloei and Kharrat, 2009;Yadali Jamaloei et al, 2011a), and reservoir heterogeneity (Ma et al, 2007). The morphology and heterogeneity of the reservoir rock play a significant role in the behavior of chemical flooding processes.…”

Section: Factors That Influence the Chemical Floodingmentioning

confidence: 99%

Chemical Flooding in Naturally Fractured Reservoirs: Fundamental Aspects and Field-Scale Practices

Jamaloei

2011

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Résumé -Inondation chimique dans les réservoirs naturellement fracturés : aspects fondamentaux et pratiques de plein champ -Des méthodes appropriées devraient être utilisées pour augmenter la récupération d'huile des réservoirs naturellement fracturés (RNFs). Un des candidats pour augmenter cette récupération d'huile de ces réservoirs est l'injection d'eau contenant des agents chimiques. Cet article met en lumière les résultats techniques et les défis de cette technique. La classification, les caractéristiques de production, les mécanismes de rétablissement du RNFs et les résultats significatifs de l'injection d'eau contenant des agents chimiques dans ces réservoirs sont passés en revue et analysés. Ce papier vise à être un outil de référence utile aux ingénieurs intéressés par l'injection d'eau contenant des agents chimiques dans les RNFs. Abstract -Chemical Flooding in Naturally Fractured

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Optimum Formulation of Surfactant/Water/Oil Systems for Minimum Interfacial Tension or Phase Behavior

Cited by 481 publications

References 12 publications

Equivalent Alkane Carbon Number of Live Crude Oil: A Predictive Model Based on Thermodynamics

Equivalent Alkane Carbon Number of Live Crude Oil: A Predictive Model Based on Thermodynamics

Nanoemulsion stability: Experimental evaluation of the flocculation rate from turbidity measurements

Chemical Flooding in Naturally Fractured Reservoirs: Fundamental Aspects and Field-Scale Practices

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