Estimation of Fracture System and Stress State of Ogachi HDR Reservoir by Using AE Multiplet Analysis

Hirokazu MORIYA, Shinichi MIYANO, Hiroaki NIITSUMA, Hideshi KAIEDA
2003 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 around
doi:10.11367/grsj1979.25.15 fatcat:x2imatgkz5hknpjwdfgoru3xmu