Hydraulic Modeling of Induced and Propagated Fractures: Analysis of Flow and Pressure Data From Hydromechanical Experiments in the COSC‐1 Deep Borehole in Crystalline Rock Near Åre, Sweden

Abstract

Fluid flow and transport phenomena through fractured rocks have received significant interest in many geoscience problems such as nuclear and chemical waste disposal, CO 2 sequestration, enhanced geothermal systems (EGS), oil and gas recovery, and unconventional energy resources (Koyama et al., 2008). In hard fractured crystalline rocks, fluid flow occurs through rock fractures due to the inherently low permeability of the rock matrix (Cao et al., 2018;Tsang & Niemi, 2013;Zimmerman & Bodvarsson, 1996). In-situ mechanical and hydraulic processes in fractured rocks are highly coupled (Tsang, 1991;Tsang et al., 2007), and to understand the coupled hydromechanical behavior of fractures, in-situ coupled hydromechanical experiments are needed.There are a number of in-situ hydromechanical experiments conducted in crystalline rocks, such as experiments performed in the Aspö Hard