Hydraulic fracturing with a simplified fluid model and XFEM |
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Authors: | Markus Schätzer Thomas-Peter Fries |
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Institution: | Institute of Structural Analysis, Graz University of Technology, Lessingstr. 25/II, 8010 Graz, Austria |
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Abstract: | In hydraulic fracturing, the pressure exerted by the fracking fluid onto the surrounding solid, is typically obtained from solving the Reynolds equation. This is not always robust and leads to a complex behaviour at the crack front (toughness or viscous regimes). In the presented work, the Reynolds equation is replaced by a simplified fluid model, where pre-defined pressure distributions are assumed which lead to a simpler and robust coupled problem. The surface integration of the fluid pressure onto the surrounding solid is outlined without any limitations on the distributions. (© 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim) |
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