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| | Abstract | | An experimental three-dimensional (3-D) seismic survey was conducted by JOGMEC in the Yamagawa geothermal field, Kagoshima, Japan. The 3-D seismic method reduces geological risks and increases success rates in drilling. However, many of geothermal fields in Japan exist in the mountainous area. Seismic surveys might suffer from a rough topography and complicated geological structure. Since effectiveness and cost of a seismic survey in Japanese geothermal area were the centers of the discussion, the Yamagawa 3-D survey took the following approaches. First, high-density 3-D data were collected to show proper images of the geothermal reservoir. Second, several subsets with different survey designs were extracted and their images were compared to determine the relative cost-effectiveness. |
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