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Fractures are ubiquitous in the brittle lithosphere in the upper part of earth’s crust. They play a critical role in the transport of fluids. Moreover, all major discovered geothermal reservoirs and a considerable number of petroleum reservoirs are in fractured rocks. This restates the importance of studying multiphase flow behavior inside the opened fracture space. From the engineering point of view, a rock fracture as defined here is simply a complex-shaped cavity filled with fluids or solid minerals. Therefore it is understood to include cracks, joints, and faults. Fractures are formed by a crystallized melt and/or mechanical failure of the rock due to regional or local geological stresses. | ers Reef Trail Cherry Canyon Liquid-Gas Relative Permeabilities in Fractures Effects of Flow Structures Phase Transformation and Surface Roughness Chih-Ying Chen June 2005 Stanford Geothermal Program Interdisciplinary Research in Engineering and Earth Sciences stAnfoRD university Stanford California Copyright by Chih-Ying Chen 2005 All Rights Reserved SGP-TR-177 .
