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Shahab Ayatollahi - One of the best experts on this subject based on the ideXlab platform.
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Prediction of Three-Dimensional (3-D) Adhesion Maps, Using the Stability of the Thin Wetting Film during the Wettability Alteration Process
2015Co-Authors: Marziyeh Rahbar, Ali Roosta, Shahab Ayatollahi, Mohammad H. GhateeAbstract:The preferential attraction of fluid on the rock surfaces, known as wettability, has serious implication because of their impact on multi phase flow in the rock hence the recovery efficiency of petroleum reservoirs. However, the prediction of wetting and the mechanisms of wettability changes during the production are difficult because of the complex chemical composition of the Crude Oil and the formation brine as well as the interaction with the minerals very close to the rock surface. To understand these mechanisms one needs to investigate the interactions that take place between Crude Oil, brine and rock surfaces. The objective of this work is to present the results of developed model based on the rock/fluids interactions for the prediction of the wettability state in a solid/brine/Crude Oil System. In this model, a three-dimensional (3D) adhesion map and surface wettability are related to the film stability through disjoining pressure isotherm of the wetting phase film separating the solid and nonwetting phase. Besides, the mechanism of wetting changes and predominant surface forces is diagnosed through disjoining pressure. This model is especially designed to predict the wettability and its alteration for the tight rocks, which is seldom to be done through the laboratory measurements
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toward mechanistic understanding of heavy Crude Oil brine interfacial tension the roles of salinity temperature and pressure
Fluid Phase Equilibria, 2014Co-Authors: Farzaneh Moeini, Abdolhossein Hemmatisarapardeh, Mohammad Hossein Ghazanfari, Mohsen Masihi, Shahab AyatollahiAbstract:Abstract Injecting low salinity brines is regarded as an enhanced Oil recovery (EOR) process through IFT reduction. However, the exact mechanism behind this process is an unsettled and complex issue that has not been well understood yet, especially for heavy Crude Oil System. Besides, limited information is available regarding the key heavy Oil/brine interfacial tension (IFT). The present study aims to investigate the sensitivity of dead heavy Crude Oil/brine IFT to a wide range of properties/conditions and to reveal the underlying physicochemical mechanisms involved in enhanced Oil recovery and IFT reduction by low salinity water injection into heavy Oil reservoir. IFT was measured as a function of salinity, temperature, and pressure by means of the IFT 700 apparatus making available the use of the state-of-the-art axisymmetric drop shape analysis (ADSA) technique for the pendant drop case. Meanwhile, the individual effects of monovalent and divalent ions were also investigated. The results indicate a conflict between salt and surface-active agents resulting in critical salt concentration where the IFT value is the minimum, beyond which brine dilution has a negative impact on IFT. In addition, our study illustrates that in all concentrations of salt, higher IFT values are obtained using CaCl 2 compared to NaCl aqueous solution, which is more intensive and apparent at higher concentrations. Furthermore, there is a strong inverse relationship between temperature and IFT, but a slightly increasing behavior with respect to pressure. The range of brine concentration in which the heavy Oil/brine IFT is minimized is vital for successful design of low salinity water injection.
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effect of different families imidazolium and pyridinium of ionic liquids based surfactants on interfacial tension of water Crude Oil System
Fluid Phase Equilibria, 2013Co-Authors: Ali Zeinolabedini Hezave, Shahab Ayatollahi, Samira Dorostkar, Moein Nabipour, Bahram HemmateenejadAbstract:Abstract Interfacial tension between Crude Oil and water plays a significant role in enhanced Oil recovery. Many researchers seek surfactants to reduce the interfacial tension of Crude Oil and water that can be applicable in reservoir conditions of high salinity and temperature. The current study introduces the results of using two different families of ionic liquids (ILs) including imidazolium (1-dodecyl-3-methylimidazolium chloride ([C 12 mim][Cl]) and 1-octyl-3-methylimidazolium chloride ([C 8 mim][Cl])) and pyridinium (1-dodecyl pyridinium chloride ([C 12 Py][Cl]) and 1-octyl pyridinium chloride ([C 8 Py][Cl])) for this purpose. Measured IFT values between solutions of ILs and a southern Iranian Crude Oil reveal that these ILs are successful in reducing the IFT. Unlike traditional surfactants, these ILs are more effective as the salinity increases. Also the measurements revealed that there is a correlation of the IFT of the solutions with salinity and temperature.
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dynamic interfacial tension behavior between heavy Crude Oil and ionic liquid solution 1 dodecyl 3 methylimidazolium chloride c12mim cl distilled or saline water heavy Crude Oil as a new surfactant
Journal of Molecular Liquids, 2013Co-Authors: Ali Zeinolabedini Hezave, Shahab Ayatollahi, Samira Dorostkar, Moein Nabipour, Bahram HemmateenejadAbstract:Abstract Remaining Oil after primary and secondary Oil recovery processes is the target of enhanced Oil recovery (EOR) methods. One of an efficient EOR method is chemical flooding changes several parameters lead to higher Oil recovery. One of the parameters can be manipulated by chemical flooding (injection) is reduction of formation brine/Oil interfacial tension (IFT). During the past decades, several kinds of chemicals called surfactants have been used to change the IFT of water/Crude Oil System. The most limitation of these surfactants is their inability to tolerate harsh conditions of salinity (ions). In the present study, functionality of a new kind of ionic liquid-based surfactants, can tolerate harsh condition of salinity, was investigated by measuring dynamic interfacial tension of water/heavy Crude Oil System. In this direction, 1-dodecyl-3-methylimidazolium chloride ([C12mim] [Cl]) was selected as an ionic liquid (IL)-based surfactant for the experiments and IFT measurements. The effects of salinity, NaCl concentration, temperature and concentration of IL on dynamic interfacial tension of IL solution (water + IL)/heavy Crude Oil System were examined. The experiments surprisingly revealed that presence of salinity leads to significant reduction of IFT of IL solution/heavy Crude Oil System. In addition, obtained results showed that IFT of the IL solution/heavy Crude Oil System was decreased as temperature was increased.
Abdolhossein Hemmatisarapardeh - One of the best experts on this subject based on the ideXlab platform.
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determination of minimum miscibility pressure in n2 Crude Oil System a robust compositional model
Fuel, 2016Co-Authors: Abdolhossein Hemmatisarapardeh, Amir H. Mohammadi, Mohammad Fathinasab, Erfan MohagheghianAbstract:Nitrogen has been valued as an economical alternative injection gas for gas-based enhanced Oil recovery (EOR) processes. Minimum miscibility pressure (MMP) is the most important parameter to successfully design N2 flooding. In this communication, a data bank covering wide ranges of thermodynamic and compositional conditions was gathered from open literature. Afterward, a rigorous approach, namely least square support vector machine (LSSVM) optimized with coupled simulated annealing (CSA) was proposed to develop a reliable and robust model for the prediction of MMP of pure/impure N2–Crude Oil. The results of this study showed that the proposed model is more reliable and accurate than the pre-existing models in a wider range of thermodynamic and process conditions. The proposed model predicts the total dataset (84 MMP data points of pure N2, nitrogen mixture streams and lean gases) with an average absolute relative error of 5.17%. Finally, by employing the relevancy factor, it was found that the intermediate components of Crude Oil have the most significant impact on the nitrogen MMP estimation and Leverage approach shows that only two data points (2.4%) are outside the applicability domain of the model proving the reliability of the developed model.
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toward mechanistic understanding of heavy Crude Oil brine interfacial tension the roles of salinity temperature and pressure
Fluid Phase Equilibria, 2014Co-Authors: Farzaneh Moeini, Abdolhossein Hemmatisarapardeh, Mohammad Hossein Ghazanfari, Mohsen Masihi, Shahab AyatollahiAbstract:Abstract Injecting low salinity brines is regarded as an enhanced Oil recovery (EOR) process through IFT reduction. However, the exact mechanism behind this process is an unsettled and complex issue that has not been well understood yet, especially for heavy Crude Oil System. Besides, limited information is available regarding the key heavy Oil/brine interfacial tension (IFT). The present study aims to investigate the sensitivity of dead heavy Crude Oil/brine IFT to a wide range of properties/conditions and to reveal the underlying physicochemical mechanisms involved in enhanced Oil recovery and IFT reduction by low salinity water injection into heavy Oil reservoir. IFT was measured as a function of salinity, temperature, and pressure by means of the IFT 700 apparatus making available the use of the state-of-the-art axisymmetric drop shape analysis (ADSA) technique for the pendant drop case. Meanwhile, the individual effects of monovalent and divalent ions were also investigated. The results indicate a conflict between salt and surface-active agents resulting in critical salt concentration where the IFT value is the minimum, beyond which brine dilution has a negative impact on IFT. In addition, our study illustrates that in all concentrations of salt, higher IFT values are obtained using CaCl 2 compared to NaCl aqueous solution, which is more intensive and apparent at higher concentrations. Furthermore, there is a strong inverse relationship between temperature and IFT, but a slightly increasing behavior with respect to pressure. The range of brine concentration in which the heavy Oil/brine IFT is minimized is vital for successful design of low salinity water injection.
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experimental determination of interfacial tension and miscibility of the co2 Crude Oil System temperature pressure and composition effects
Journal of Chemical & Engineering Data, 2014Co-Authors: Abdolhossein Hemmatisarapardeh, Mohammad Hossein Ghazanfari, Mohsen MasihiAbstract:Interfacial tension (IFT) as one of the main properties for efficient CO2 flooding planning in Oil reservoirs depends strongly on pressure, temperature, and composition of the reservoir fluids. Therefore, it is important to measure this property at real reservoir conditions for successful field development plan. In this study, an axisymmetric drop shape analysis (ADSA) has been utilized to measure the equilibrium IFTs between Crude Oil and CO2 at different temperatures and pressures. Moreover, minimum miscibility pressures (MMP) and first-contact miscibility pressures (Pmax) of Crude Oil/CO2 Systems at different temperatures are determined by applying the vanishing interfacial tension (VIT) technique. Besides, the effects of paraffins content and resin to asphaltene ratio of the Crude Oil on the IFT behavior are investigated. The results show that while the IFT has a decreasing trend with temperature at low pressures region, it has an increasing trend with temperature at high pressures. Also, MMP and Pmax...
Bahram Hemmateenejad - One of the best experts on this subject based on the ideXlab platform.
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effect of different families imidazolium and pyridinium of ionic liquids based surfactants on interfacial tension of water Crude Oil System
Fluid Phase Equilibria, 2013Co-Authors: Ali Zeinolabedini Hezave, Shahab Ayatollahi, Samira Dorostkar, Moein Nabipour, Bahram HemmateenejadAbstract:Abstract Interfacial tension between Crude Oil and water plays a significant role in enhanced Oil recovery. Many researchers seek surfactants to reduce the interfacial tension of Crude Oil and water that can be applicable in reservoir conditions of high salinity and temperature. The current study introduces the results of using two different families of ionic liquids (ILs) including imidazolium (1-dodecyl-3-methylimidazolium chloride ([C 12 mim][Cl]) and 1-octyl-3-methylimidazolium chloride ([C 8 mim][Cl])) and pyridinium (1-dodecyl pyridinium chloride ([C 12 Py][Cl]) and 1-octyl pyridinium chloride ([C 8 Py][Cl])) for this purpose. Measured IFT values between solutions of ILs and a southern Iranian Crude Oil reveal that these ILs are successful in reducing the IFT. Unlike traditional surfactants, these ILs are more effective as the salinity increases. Also the measurements revealed that there is a correlation of the IFT of the solutions with salinity and temperature.
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dynamic interfacial tension behavior between heavy Crude Oil and ionic liquid solution 1 dodecyl 3 methylimidazolium chloride c12mim cl distilled or saline water heavy Crude Oil as a new surfactant
Journal of Molecular Liquids, 2013Co-Authors: Ali Zeinolabedini Hezave, Shahab Ayatollahi, Samira Dorostkar, Moein Nabipour, Bahram HemmateenejadAbstract:Abstract Remaining Oil after primary and secondary Oil recovery processes is the target of enhanced Oil recovery (EOR) methods. One of an efficient EOR method is chemical flooding changes several parameters lead to higher Oil recovery. One of the parameters can be manipulated by chemical flooding (injection) is reduction of formation brine/Oil interfacial tension (IFT). During the past decades, several kinds of chemicals called surfactants have been used to change the IFT of water/Crude Oil System. The most limitation of these surfactants is their inability to tolerate harsh conditions of salinity (ions). In the present study, functionality of a new kind of ionic liquid-based surfactants, can tolerate harsh condition of salinity, was investigated by measuring dynamic interfacial tension of water/heavy Crude Oil System. In this direction, 1-dodecyl-3-methylimidazolium chloride ([C12mim] [Cl]) was selected as an ionic liquid (IL)-based surfactant for the experiments and IFT measurements. The effects of salinity, NaCl concentration, temperature and concentration of IL on dynamic interfacial tension of IL solution (water + IL)/heavy Crude Oil System were examined. The experiments surprisingly revealed that presence of salinity leads to significant reduction of IFT of IL solution/heavy Crude Oil System. In addition, obtained results showed that IFT of the IL solution/heavy Crude Oil System was decreased as temperature was increased.
Mohsen Masihi - One of the best experts on this subject based on the ideXlab platform.
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toward mechanistic understanding of heavy Crude Oil brine interfacial tension the roles of salinity temperature and pressure
Fluid Phase Equilibria, 2014Co-Authors: Farzaneh Moeini, Abdolhossein Hemmatisarapardeh, Mohammad Hossein Ghazanfari, Mohsen Masihi, Shahab AyatollahiAbstract:Abstract Injecting low salinity brines is regarded as an enhanced Oil recovery (EOR) process through IFT reduction. However, the exact mechanism behind this process is an unsettled and complex issue that has not been well understood yet, especially for heavy Crude Oil System. Besides, limited information is available regarding the key heavy Oil/brine interfacial tension (IFT). The present study aims to investigate the sensitivity of dead heavy Crude Oil/brine IFT to a wide range of properties/conditions and to reveal the underlying physicochemical mechanisms involved in enhanced Oil recovery and IFT reduction by low salinity water injection into heavy Oil reservoir. IFT was measured as a function of salinity, temperature, and pressure by means of the IFT 700 apparatus making available the use of the state-of-the-art axisymmetric drop shape analysis (ADSA) technique for the pendant drop case. Meanwhile, the individual effects of monovalent and divalent ions were also investigated. The results indicate a conflict between salt and surface-active agents resulting in critical salt concentration where the IFT value is the minimum, beyond which brine dilution has a negative impact on IFT. In addition, our study illustrates that in all concentrations of salt, higher IFT values are obtained using CaCl 2 compared to NaCl aqueous solution, which is more intensive and apparent at higher concentrations. Furthermore, there is a strong inverse relationship between temperature and IFT, but a slightly increasing behavior with respect to pressure. The range of brine concentration in which the heavy Oil/brine IFT is minimized is vital for successful design of low salinity water injection.
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experimental determination of interfacial tension and miscibility of the co2 Crude Oil System temperature pressure and composition effects
Journal of Chemical & Engineering Data, 2014Co-Authors: Abdolhossein Hemmatisarapardeh, Mohammad Hossein Ghazanfari, Mohsen MasihiAbstract:Interfacial tension (IFT) as one of the main properties for efficient CO2 flooding planning in Oil reservoirs depends strongly on pressure, temperature, and composition of the reservoir fluids. Therefore, it is important to measure this property at real reservoir conditions for successful field development plan. In this study, an axisymmetric drop shape analysis (ADSA) has been utilized to measure the equilibrium IFTs between Crude Oil and CO2 at different temperatures and pressures. Moreover, minimum miscibility pressures (MMP) and first-contact miscibility pressures (Pmax) of Crude Oil/CO2 Systems at different temperatures are determined by applying the vanishing interfacial tension (VIT) technique. Besides, the effects of paraffins content and resin to asphaltene ratio of the Crude Oil on the IFT behavior are investigated. The results show that while the IFT has a decreasing trend with temperature at low pressures region, it has an increasing trend with temperature at high pressures. Also, MMP and Pmax...
Ali Zeinolabedini Hezave - One of the best experts on this subject based on the ideXlab platform.
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effect of different families imidazolium and pyridinium of ionic liquids based surfactants on interfacial tension of water Crude Oil System
Fluid Phase Equilibria, 2013Co-Authors: Ali Zeinolabedini Hezave, Shahab Ayatollahi, Samira Dorostkar, Moein Nabipour, Bahram HemmateenejadAbstract:Abstract Interfacial tension between Crude Oil and water plays a significant role in enhanced Oil recovery. Many researchers seek surfactants to reduce the interfacial tension of Crude Oil and water that can be applicable in reservoir conditions of high salinity and temperature. The current study introduces the results of using two different families of ionic liquids (ILs) including imidazolium (1-dodecyl-3-methylimidazolium chloride ([C 12 mim][Cl]) and 1-octyl-3-methylimidazolium chloride ([C 8 mim][Cl])) and pyridinium (1-dodecyl pyridinium chloride ([C 12 Py][Cl]) and 1-octyl pyridinium chloride ([C 8 Py][Cl])) for this purpose. Measured IFT values between solutions of ILs and a southern Iranian Crude Oil reveal that these ILs are successful in reducing the IFT. Unlike traditional surfactants, these ILs are more effective as the salinity increases. Also the measurements revealed that there is a correlation of the IFT of the solutions with salinity and temperature.
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dynamic interfacial tension behavior between heavy Crude Oil and ionic liquid solution 1 dodecyl 3 methylimidazolium chloride c12mim cl distilled or saline water heavy Crude Oil as a new surfactant
Journal of Molecular Liquids, 2013Co-Authors: Ali Zeinolabedini Hezave, Shahab Ayatollahi, Samira Dorostkar, Moein Nabipour, Bahram HemmateenejadAbstract:Abstract Remaining Oil after primary and secondary Oil recovery processes is the target of enhanced Oil recovery (EOR) methods. One of an efficient EOR method is chemical flooding changes several parameters lead to higher Oil recovery. One of the parameters can be manipulated by chemical flooding (injection) is reduction of formation brine/Oil interfacial tension (IFT). During the past decades, several kinds of chemicals called surfactants have been used to change the IFT of water/Crude Oil System. The most limitation of these surfactants is their inability to tolerate harsh conditions of salinity (ions). In the present study, functionality of a new kind of ionic liquid-based surfactants, can tolerate harsh condition of salinity, was investigated by measuring dynamic interfacial tension of water/heavy Crude Oil System. In this direction, 1-dodecyl-3-methylimidazolium chloride ([C12mim] [Cl]) was selected as an ionic liquid (IL)-based surfactant for the experiments and IFT measurements. The effects of salinity, NaCl concentration, temperature and concentration of IL on dynamic interfacial tension of IL solution (water + IL)/heavy Crude Oil System were examined. The experiments surprisingly revealed that presence of salinity leads to significant reduction of IFT of IL solution/heavy Crude Oil System. In addition, obtained results showed that IFT of the IL solution/heavy Crude Oil System was decreased as temperature was increased.