Physical aspects and modeling of the fracture in rocks and cementitious materials

Reference Presenter Authors
(Institution)
Abstract
09-090 Omar Rodriguez-Villarreal Rodriguez-Villarreal, O.(Universidad Autonoma de Nuevo León); The purpose of this research is to study the fracture surfaces of a complex network of fractures generated by means of hydraulic fracture or hydrostatic pressure under conditions presented in an Enhanced Geothermal System (EGS). Fractures generated by hydrostatic pressure are a particular class of mode I tensile fractures, which grow by the coalescence of micro-cracks. By studying this type of fracturing process, it is possible to improve the performance of a geothermal field. The present work will focus on rocks typical of geothermal reservoirs, shale and limestone rocks, as well as concrete and mortar since we can refer to these composite materials as synthetic rocks. We will study the effects of the internal structure of the material, the confinement stress, temperature and fluid injection flow rate on the mechanical properties of rock formation, (i.e., tensile and compression strength, fracture energy, etc.), the geometry of the fracture network generated, the roughness of such fractures and the acoustic emission during the hydraulic fracture.
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