Study on threats to use multiple reservoirs of geothermal energy

# Introduction The Tender Document at hand contains information regarding this invitation to tender conducted in accordance with the European open procedure for the following research: Potential hazards related to the use of multiple reservoirs in geothermal operations. # Reason for this invitation to tender State Supervision of Mines (SSM) would like to understand the potential hazards related to the use of multiple reservoirs in geothermal operations. Extraction of heat from two or more reservoirs vertically separated by lowpermeability layers involves the assumption that the volume ratio between the reservoirs for the extracted fluid is equal to the volume ratio between the reservoirs for the injected fluid. However - non-homogenous system properties may affect - amongst others - the fluid flow and pressure...