Borehole damaging under thermo-mechanical loading in the RN-15/IDDP-2 deep well: towards validation of numerical modeling using logging images
作者: M. Peter-BorieA. LoschetterI. A. MerciuG. KampferO. Sigurdsson
作者单位: 1BRGM
2Equinor ASA, Research and Technology
刊名: Geothermal Energy, 2018, Vol.6 (1), pp.1-33
来源数据库: Springer Journal
DOI: 10.1186/s40517-018-0102-7
关键词: EGS (Enhanced Geothermal System)BoreholeThermal stimulationFracture initiationDEM (Discrete Element Model)PFC2DLWDBorehole logging images
英文摘要: Abstract(#br)A wider exploitation of deep geothermal reservoir requires the development of Enhanced Geothermal System technology. In this context, drilling and stimulation of high-enthalpy geothermal wells raise technical challenges. Understanding and predicting the rock behavior near a deep geothermal wellbore are decisive to implement stimulation strategies to reach the couple temperature/flowrate target. Numerical modeling can contribute to enhanced stimulation processes thanks to a better understanding of impact of stress release, pressure changes and rock cooling in the near-wellbore area. In this paper, we use Discrete Element Method (code PFC2D, © Itasca Consulting Group), and more specifically bonded-particle model to capture the thermo-mechanical processes at metric scale. The...
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