<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Comparison of Characteristics of Micro-Earthquakes Observed During Hydraulic Stimulation Operations in Ogachi, Hijiori and Cooper Basin HDR Projects"^^ . "In Hot Dry Rock (HDR) or Hot Fractured Rock (HFR)\r\ngeothermal energy development, micro-earthquake events\r\nwere observed to evaluate the location and size of fracture\r\ndistribution of artificially created reservoirs during hydraulic\r\nstimulation operations. Many micro-earthquake events were\r\nobserved during hydraulic stimulation operations from\r\ndepths of around 1,000 m to 4,200 m at three different sites:\r\nOgachi and Hijiori in Japan and Cooper Basin in Australia.\r\nComparison of the water injection operations to observed\r\nmicro-earthquake hypocenter locations and the rate of events\r\nled to the observation of some differences and similarities.\r\nSeismic activities at the beginning of the water injection\r\nphase were low in Ogachi and Hijiori until the injected\r\nwater volume reached that which was injected in a previous\r\ntest, but high activity was observed from the onset of\r\ninjection at the Cooper Basin site. This difference is thought\r\nto be caused by the injected water recovery from the\r\nfractures.\r\nIt was seen in Cooper Basin that the previously activated\r\narea was quiet in the successive stimulation operations. This\r\nis thought to be caused by stress release from previous water\r\ninjection.\r\nThe water volume injected and the seismically activated area\r\nshowed linear correlation. However, the inclination of the\r\nrelationship is different and depends on the site. The\r\nseismically activated region at Cooper Basin extended much\r\nfurther than other sites. These differences are thought to be\r\nstrongly dependent on regional natural joint systems."^^ . "2010" . . "International Geothermal Assocation"^^ . . . . . . . . . . . . "Shunji"^^ . "Sasaki"^^ . "Shunji Sasaki"^^ . . "Hideshi"^^ . "Kaieda"^^ . "Hideshi Kaieda"^^ . . "D."^^ . "Wyborn"^^ . "D. Wyborn"^^ . . "1646, Abiko, Abiko-shi, Chiba, 270-1194, Japan"^^ . . . "1-5-18, Sarugaku-cho, Chiyoda-ku, Tokyo, 101-0064, Japan"^^ . . . "Level 2, 23A Graham Street Milton Qld 4064, Australia"^^ . . . . . . "HTML Summary of #1781 \n\nComparison of Characteristics of Micro-Earthquakes Observed During Hydraulic Stimulation Operations in Ogachi, Hijiori and Cooper Basin HDR Projects\n\n" . "text/html" . . . "Collective properties of seismicity" . . . "Copper Basin" . . . "Geothermal energy production" . .