A Workflow for Optimization of Flow Control Devices in SAGD

  • Author(s) / Creator(s)
  • In McMurray Formation, steam assisted gravity drainage is used as the primary in-situ
    recovery technique to recover oil sands. Different geological reservoir settings and long horizontal
    wells impose limitations and operational challenges on the implementation of steam-assisted gravity
    drainage (SAGD). The dual-string tubing system is the conventional completion scheme in SAGD.
    In complex reservoirs where dual-string completion cannot improve the operation performance,
    operators have adopted flow control devices (FCDs) to improve project economics. FCDs secure more
    injection/production points along the horizontal sections of the SAGD well pairs, hence, they maximize
    ultimate bitumen recovery and minimize cumulative steam-oil ratio (cSOR). This paper will focus on
    the optimization of outflow control devices (OCDs) in SAGD reservoirs with horizontal wellbore
    undulations. We present the detailed optimization workflow and show the optimization results for
    various scenarios with well pair trajectory undulation. Comparing the results of the optimized OCDs
    case with a dual-string case of the same SAGD model shows improvements in steam distribution,
    steam chamber growth, bitumen production, and net present value (NPV).

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  • Type of Item
    Article (Published)
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  • License
    Attribution-NonCommercial 4.0 International