Evaluation of geothermal reservoir cracks by shear-wave splitting of acoustic emission
作者： M. Sato , N. Matsumoto , H. Niitsuma
DOI: 10.1016/0375-6505(91)90032-Q
关键词: Geothermal power 、 Shear wave splitting 、 Geothermal energy 、 Acoustic emission 、 Seismic wave 、 Geology 、 Polarization (waves) 、 Seismology 、 Mineralogy 、 Nondestructive testing 、 Shear (geology) 、 Geotechnical Engineering and Engineering Geology 、 Renewable Energy, Sustainability and the Environment
摘要: Abstract Shear-wave splitting of acoustic emissions (AE) was analyzed to obtain a description and evaluation subsurface cracks in natural geothermal reservoir. During shutdown operations production wells 1984–1986 at the Kakkonda (Takinoue) power plant, Japan, several thousand AE events were located with downhole tri-axial sonde. A total 145 these showed shear-wave they used estimate depth crack density multiple layers The polarization determine orientation cracks, calculated from delays between polarization-anomalies. reservoir divided into three zones based on observed characteristics shear wave splitting. These are identified as injection, intermediate zones.
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