| Title | DATA ANALYSES OF THE AIRBORNE SURVEY TO CLARIFY THE GEOTHERMAL STRUCTURE AND TO EVALUATE THE GEOTHERMAL POTENTIAL |
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| Authors | T. Tosha, T. Shimada, M. Fukada |
| Year | 2015 |
| Conference | New Zealand Geothermal Workshop |
| Keywords | Geothermal, Airborne Survey, Helicopter, Gravity, Gradiomenter, Time-Domain Magnetotelluric, Magnetic Field. |
| Abstract | Governmental supports at the early stage are necessary for the geothermal energy development in Japan. The national-wide projects for the development were conducted by NEDO, which established in 1980 after the crisis of the oil supply in 1970s’. The “Geothermal Development Promotion Survey” was initiated by NEDO and was aimed to present fundamental geothermal data for the development. In the survey project ground surveys using geological, geophysical, geochemical methods, drilling investigation wells, well logging in the wells were conducted and the geothermal potential in the survey area was estimated by the numerical simulation model. Following the successful ground surveys, national projects for the early stage development were also requested. A survey using a helicopter was started in 2013 by JOGMEC to find out the fracture system and to evaluate the geothermal resources. There was, however, no precedent for the airborne survey used by a helicopter in Japanese geothermal field, which is usually located in a mountainous region, and therefore operational impracticability was concerned. This paper will present the outlines of the survey and discuss on the methods to analyze the data. |