A hybrid discrete/finite element modeling study of complex hydraulic fracture development for enhanced geothermal systems (EGS) in granitic basements

• Published in: Geothermics Vol. 64; pp. 362 - 381
• Main Authors: Hofmann, Hannes, Babadagli, Tayfun, Yoon, Jeoung Seok, Blöcher, Guido, Zimmermann, Günter
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.11.2016; Elsevier Science Ltd
• Subjects: Basements; Complexity; Computer simulation; Crack propagation; Drilling; Enhanced geothermal systems; Finite element analysis; Finite element method; Fracture mechanics; Fractures; Geothermal power; Hydraulic fracturing; Hydraulic fracturing design; Interface between DEM and FEM; Mathematical analysis; Mathematical models; Multi-branched fracture development in granites; Networks; OpenGeoSys; Particle flow code; Permeability; Precambrian; Reservoirs; Rocks; Stimulation; Studies; System effectiveness; Two dimensional models; Viscosity; Wells; Hydraulic fracturing design; Multi-branched fracture development in granites; Interface between DEM and FEM; Enhanced geothermal systems; Particle flow code; OpenGeoSys

•An interface combining a particle based DEM and an open source FEM code presented.•Complex hydraulic fracture development and thermal behavior was modeled for EGS.•Both wells should be stimulated to achieve a better hydraulic connection between them.•A small stage spacing (100m) should be used to i...