Three-Dimensional Resistivity Structure of the Minamikayabe Geothermal Zone Revealed by Bayesian Inversion of MT Data
- Key words
- magnetotelluric sounding, three-dimensional, imaging, electrical resistivity, geothermal reservoir.
- Location
- Minamikayabe, Japan
- Conference
- World Geothermal Congress
- Year
- 2005
- Session
- 7. Geophysics
- Language
- English
- Paper number
- 0703
Full text
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Abstract
The paper presents application of the Bayesian inversion methodology to construction of 3-D resistivity model of the Minamikayabe geothermal area by magnetotelluric (MT) data. In order to obtain an initial image of the geoelectric structure of the survey area, Bostick transformation of the determinant apparent resistivity is used. Further refinement of the model is accomplished by full-range 3-D inversion of all elements of the impedance tensor. Two-stage procedure results in 3-D geoelectrical model of the studied area, from which a highly conductive zone associated with geothermal reservoir is picked out.
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