Papers by Mohammad Shadadeh
for their great support, patience, generosity and valuable guidance during this work. I would lik... more for their great support, patience, generosity and valuable guidance during this work. I would like to thank my wife and my family for their encouragement and consideration during this project. I would like to express my appreciation to my thesis defence examiner and committee members. I would like to thank the Faculty of Graduate Studies and Research for its financial support in the form of graduate scholarships and teaching assistantship awards. Finally, I would like to extend my grateful gratitude to my past and present research group members, for their knowledge, friendship, and encouragement during my studies at the
Journal of Petroleum Exploration and Production Technology, Jun 9, 2018
This paper presents an improved procedure for generating pseudorelative permeability curves for s... more This paper presents an improved procedure for generating pseudorelative permeability curves for stratified water flooding using either constant pressures or constant flux at the reservoir/grid block boundaries. The concept of pseudorelative permeability reflects the generation of a relative permeability curve that can be used to represent the entire reservoir thickness, rather than a specific layer during reservoir simulation, thus saving computational time. In this paper, fractional flow theory is applied to the generation of pseudorelative permeability curves for (1) constant flow rate and (2) constant pressure boundary conditions. Previously, pseudorelative permeability curves were generated for constant flow rate only, since the analytical solutions for constant pressure boundaries were non-existant. In this paper, this restriction has been removed based on novel analytical solutions for constant pressure boundaries. The method within this paper also differs from previous methodologies and studies, which are all based on an approximation using piston-like displacement for water flooding. Instead, this new model uses fractional flow theory to its fullest extent to generate pseudorelative permeability curves that are physically more realistic. The solution is extended to generate pseudorelative permeability curves for waterflooding of a reservoir under the assumption of constant pressure boundaries which is an equally realistic assumption in comparison to constant flow rate. The generated pseudorelative permeability curves are used in a 2D areal reservoir model in a standard reservoir simulator to predict the behavior of the fully layered 3D reservoir model. It is found that there is considerably better agreement between the results obtained with this new method and the fully layered reservoir model compared to previous methods.
Journal of Molecular Liquids, Apr 1, 2017
Abstract Of the most important methods of enhancing oil extraction from petroleum reservoirs incl... more Abstract Of the most important methods of enhancing oil extraction from petroleum reservoirs includes injecting chemical materials of which surfactants have been found to play a significant role. In surfactant concentrations higher than critical micelle concentration (CMC), formation of micelles is started which will lead to change in the properties of microemulsion. In previous studies, the effect of transformation of micelle from spherical to cylindrical shape on the viscosity of DeAC (dodecyl ammonium chloride) microemulsion has been discussed. In this paper, application of CTAB (Cetyl trimethylammonium bromide, a cationic surfactant) in above CMC ranges has been studied based on the data from laboratory tests and proposed models in order to predict microemulsion viscosity. Moreover, the size of cylindrical micelles has been calculated using some mathematical equations for the first time. The results showed that the shape transformation from spherical to cylindrical happens to CTAB surfactant leading to vigorous increase in viscosity. Additionally, size calculation of micelles in different conditions and their comparison to pore throats dimension of porous media suggest that for certain conditions, they are adequately smaller than the pore throats. It is therefore suggested that CTAB surfactant may be utilized as a sole reagent in lowering IFT and mobility ratio instead of implementation of CTAB-polymer, making the possible chemical enhanced oil recovery (EOR) process less costly.
This research presents an improved procedure for generating pseudo relative permeability curves f... more This research presents an improved procedure for generating pseudo relative permeability curves for stratified waterflooding using either constant pressure or constant flux at the reservoir boundaries. Pseudo relative permeability reflects the generation of a relative permeability curve that can be used to represent the entire reservoir thickness, rather than a specific layer during reservoir simulation, thus saving computational time. In this project, Fractional Flow Theory is applied to the generation of pseudo relative permeability curves for i) constant flow rate condition, and ii) constant pressure boundary condition. Previously pseudo relative permeability curves were generated for the constant flow rate condition only. The method differs from previous methodologies and studies, which are all based on a piston-like displacement for water flooding. Instead, this new model uses fractional flow theory to generate a pseudo relative permeability curve that is physically more realis...
Journal of Petroleum Exploration and Production Technology, 2018
This paper presents an improved procedure for generating pseudorelative permeability curves for s... more This paper presents an improved procedure for generating pseudorelative permeability curves for stratified water flooding using either constant pressures or constant flux at the reservoir/grid block boundaries. The concept of pseudorelative permeability reflects the generation of a relative permeability curve that can be used to represent the entire reservoir thickness, rather than a specific layer during reservoir simulation, thus saving computational time. In this paper, fractional flow theory is applied to the generation of pseudorelative permeability curves for (1) constant flow rate and (2) constant pressure boundary conditions. Previously, pseudorelative permeability curves were generated for constant flow rate only, since the analytical solutions for constant pressure boundaries were non-existant. In this paper, this restriction has been removed based on novel analytical solutions for constant pressure boundaries. The method within this paper also differs from previous methodologies and studies, which are all based on an approximation using piston-like displacement for water flooding. Instead, this new model uses fractional flow theory to its fullest extent to generate pseudorelative permeability curves that are physically more realistic. The solution is extended to generate pseudorelative permeability curves for waterflooding of a reservoir under the assumption of constant pressure boundaries which is an equally realistic assumption in comparison to constant flow rate. The generated pseudorelative permeability curves are used in a 2D areal reservoir model in a standard reservoir simulator to predict the behavior of the fully layered 3D reservoir model. It is found that there is considerably better agreement between the results obtained with this new method and the fully layered reservoir model compared to previous methods.
Planning for injection operation and determination of optimum time for acidizing an injection wel... more Planning for injection operation and determination of optimum time for acidizing an injection well require knowing the reservoir properties in the near wellbore. Conventional method to determine these properties is using two observation and one injection well, which is require ceasing the injection operation and spending more money and time. Based on performed studies, using daily production and injection data could be a proper solution to reduce expenses. In this paper, it has been tried to determine essential near wellbore properties such as formation skin, radius of damage and permeability of damage area using daily injection data including: pressure, injection rate and injection time. A new method to determine reservoir properties around the wellbore was devised by the application of injection process modeling. Finally, the developed method was applied to a real data of a water injection well in one of southern Iranian oil fields. In addition, the estimated data were validated c...
Journal of Molecular Liquids, 2017
Abstract Of the most important methods of enhancing oil extraction from petroleum reservoirs incl... more Abstract Of the most important methods of enhancing oil extraction from petroleum reservoirs includes injecting chemical materials of which surfactants have been found to play a significant role. In surfactant concentrations higher than critical micelle concentration (CMC), formation of micelles is started which will lead to change in the properties of microemulsion. In previous studies, the effect of transformation of micelle from spherical to cylindrical shape on the viscosity of DeAC (dodecyl ammonium chloride) microemulsion has been discussed. In this paper, application of CTAB (Cetyl trimethylammonium bromide, a cationic surfactant) in above CMC ranges has been studied based on the data from laboratory tests and proposed models in order to predict microemulsion viscosity. Moreover, the size of cylindrical micelles has been calculated using some mathematical equations for the first time. The results showed that the shape transformation from spherical to cylindrical happens to CTAB surfactant leading to vigorous increase in viscosity. Additionally, size calculation of micelles in different conditions and their comparison to pore throats dimension of porous media suggest that for certain conditions, they are adequately smaller than the pore throats. It is therefore suggested that CTAB surfactant may be utilized as a sole reagent in lowering IFT and mobility ratio instead of implementation of CTAB-polymer, making the possible chemical enhanced oil recovery (EOR) process less costly.
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Papers by Mohammad Shadadeh