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Journal of the Geothermal Research Society of Japan
Reservoir structure and stress field at the Ogachi Hot Dry Rock field , Japan, have been examined using hydraulically induced AE (Acoustic Emission/Microseismic) events . Two large scale hydraulic fracturing tests were conducted by CRIEPI (Central Research Institute of Electric Power Industry , Japan) in 1991 and 1992. The fracturing tests were carried out at two different depth intervals , 990m •'1000m and 711m•'719m. AE events were observed by using near-surface networks deployed arounddoi:10.11367/grsj1979.25.15 fatcat:x2imatgkz5hknpjwdfgoru3xmu