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emadi--mohammad
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Effect of Nitrogen Injection on Phase Behavior and Asphaltene Instability
, Ph.D. Dissertation Sharif University of Technology ; Rashtchian, Davood (Supervisor) ; Dabir, Bahram (Supervisor) ; Emadi, Mohammad Ali (Supervisor)
Abstract
Nitrogen injection is a promising enhanced oil recovery process. Asphaltene precipitation during miscible gas injection is a common problem in oilfields throughout the world. In this work, a comprehensive study is conducted on effect of gas injection on phase behavior and asphaltene instability of live oil samples. Effects of oil API, gas type and concentration, pressure and temperature are studied under natural depletion and nitrogen injection processes by means of high pressure filtration and a photographic procedure coupled with image analysis. Filtration results show that nitrogen destabilizes asphaltenes more compared to methane and the problem is more severe for heavier crude samples....
Investigation of Rheological Behavior of Polymer on EOR in Carbonate Reservoir
, Ph.D. Dissertation Sharif University of Technology ; Ramazani Saadat Abadi, Ahmad (Supervisor) ; Emadi, Mohammad Ali (Supervisor)
Abstract
The major objectives of this study are to analytically and experimentally investigate the rheological behavior of polymers in the fractured carbonate medium based on the polymer solution properties and operational conditions. The intrinsic and apparent viscosity of high molecular weight-partially hydrolyzed poly (acrylamide) which is mainly used in enhanced oil recovery (EOR) processes hasbeen investigated in reservoir conditions. Since, the EOR efficiency of hydrolyzed poly (acrylamide) is very sensitive to the temperature and salinity of petroleumreservoirs; investigations have been carried out at different possible reservoirtemperatures using high saline polymer solutions. The parameters...