Parallel Geothermal Numerical Model with Fractures and Multi-Branch Wells Laurence Beaude, Thibaud Beltzung, Konstantin Brenner, Simon Lopez, Roland Masson, Farid Smai, Jean-frédéric Thebault and Feng Xing ESAIM: ProcS, 63 (2018) 109-134 Published online: 19 October 2018 DOI: 10.1051/proc/201863109