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    Pressure transient analysis of fractured wells in shale reservoirs

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    Pressure transient analysis of ...
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    Author
    Wang, Cong
    Advisor
    Wu, Yu-Shu
    Date issued
    2013
    Keywords
    geomechanics
    unconventional reservoir simulator
    reservoir simulation
    shale gas reservoir
    non-linear flow mechanisms
    hydraulic fractures
    Multiphase flow -- Mathematical models
    Hydrocarbon reservoirs
    Shale gas reservoirs
    Hydraulic fracturing
    Fluid dynamics
    
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    URI
    https://hdl.handle.net/11124/79466
    Abstract
    In this study, an unconventional reservoir simulator is developed, which is based on a general black-oil simulator "MSFLOW". We incorporate several non-linear flow mechanisms (Klinkenberg effects, non-Darcy flow, gas adsorption and geomechanics effect) into the simulator. We also present a hybrid-fracture conceptual model to describe different types and scales of fractures from explicit hydraulic fractures and fracture network in simulated reservoir volume (SRV) to distributed natural fractures, microfractures, and tight sand matrix. Numerical formulation and its implementation of the simulator are validated using analytical results. Then this simulator is used to study gas flow in shale reservoirs. Three application examples are presented with this unconventional reservoir gas simulator. 1) We evaluate each of the above-mentioned non-linear flow mechanisms in a horizontal well, multi-stage hydraulic fractures reservoir scenario to see their influence on production. 2) We conduct a study of the "hydraulic fracture-matrix" linear flow and propose a methodology to estimate the total hydraulic fracture and matrix contact area. 3) We complete a history match of field data. These examples demonstrate the applicability of the reservoir simulator to modeling unconventional gas reservoirs.
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