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    Numerical Investigation of Geometrical and Material Parameters Effect on Inflation and Deflation of oil well Inflatable Packers

    , M.Sc. Thesis Sharif University of Technology Eftekhari, Ahmad (Author) ; Arghavani Hadi, Jamal (Supervisor)
    Inflatable packers have a great value in downhole operations due to their unique ability to expand to several times their initial diameter. These type of packers have a sealing element. This element is constructed of thin overlapped sheet metal ribs which are surrounding an inner tube. These overlapped ribs protect inner tube against the extrusion. The outer surface of this element covered by a layer of rubber. The outer elastomeric cover seals the annulus of the casing and isolates the zones in the well. In this study, some of the geometrical and material parameters effects on inflation and deflation of inflatable packers are investigated by numerical method. At first, for this purpose, the... 

    Optimal conditions for immiscible recycle gas injection process: A simulation study for one of the Iranian oil reservoirs

    , Article Scientia Iranica ; Volume 18, Issue 6 , 2011 , Pages 1407-1414 ; 10263098 (ISSN) Mohammadi, S ; Kharrat, R ; Khalili, M ; Mehranfar, M ; Sharif University of Technology
    Immiscible gas injection is one of the most common enhanced oil recovery methods used under various reservoir conditions. In this work, the immiscible recycle gas injection, as an EOR scenario for improving recovery efficiency in one of the south-west Iranian oil reservoirs, is simulated by a commercial simulator, ECLIPSE. The reservoir fluid is light oil, with an API of 43. The oil bearing formations are carbonate, and so a dual porosity/dual permeability behavior was chosen for better representation of the fracture system. Different sensitivity analyses with respect to several parameters like the number and location of injection/production wells, production/injection rate, completion... 

    Non-Newtonian fluid flow dynamics in rotating annular media: Physics-based and data-driven modeling

    , Article Journal of Petroleum Science and Engineering ; Volume 185 , 2020 Ershadnia, R ; Amooie, M. A ; Shams, R ; Hajirezaie, S ; Liu, Y ; Jamshidi, S ; Soltanian, M. R ; Sharif University of Technology
    Elsevier B.V  2020
    A thorough understanding and accurate prediction of non-Newtonian fluid flow dynamics in rotating annular media are of paramount importance to numerous engineering applications. This is in particular relevant to oil and gas industry where this type of flow could occur during, e.g., drilling, well completion, and enhanced oil recovery scenarios. Here, mathematically we report on physical-based (numerical) and data-driven (intelligent) modeling of three-dimensional laminar flow of non-Newtonian fluids driven by axial pressure gradient in annular media that consist of a coaxially rotating inner cylinder. We focus on the dynamics of pressure loss ratio (PLR)—the ratio of total pressure loss in...