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Investigation of directional hydraulic fracturing based on true tri-axial experiment and finite element modeling
Institution:1. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China;2. Datong Coal Mine Group Co., Ltd., Datong, Shanxi 037003, China;1. Department of Mining Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran;2. Department of Mining Engineering, Faculty of Engineering, Tarbiat Modares University, Tehran, Iran;3. Faculty of Petroleum Engineering, China University of Petroleum, Beijing 102249, China;1. State Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum, Beijing 102249, China;2. Department of Petroleum and Geosystems Engineering, University of Texas, Austin, TX 78712, USA;1. College of Mechanical and Transportation Engineering, China University of Petroleum, Beijing 102249, China;2. College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China;1. Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, United Kingdom;2. Geotechnical Institute, TU Bergakademie Freiberg, Gustav-Zeuner-Str. 1, 09596 Freiberg, Germany
Abstract:The initiation and propagation of directional hydraulic fracturing (DHF) was investigated based on true tri-axial experiment and finite element modeling. The influences of notch angle, notch length and injection rate on the DHF were investigated. The initiation and propagation of DHF was modeled by a 3D nonlinear finite element method. A comparison between experimental investigation and numerical modeling results indicates that there is a good correlation between unbalanced force (UF) and fracturing. UF can be used to predict the hydraulic fracture initiation and propagation.
Keywords:Directional hydraulic fracturing  Fracture initiation  Fracture propagation  Fracture geometry  True tri-axial experiment  Nonlinear finite element
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