[First Hit]

AAPG ACE 2018

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Three-Dimensional Inversion of Airborne Previous HitTimeNext Hit-Previous HitDomainNext Hit Electromagnetic Data for the Exploration of Geothermal Resources

Abstract

The airborne electromagnetic (EM) is one of the proper geophysical survey methods for the exploration of geothermal resources, which requires dense data acquisition over a large area with reasonable time. In order to interpret the acquired airborne EM data quantitatively, reliable and accurate methodology/technique is required. In this paper, we performed three-dimensional (3D) inversion of airborne Previous HittimeNext Hit-Previous HitdomainNext Hit EM data acquired by JOGMEC in 2015 over Hachimantai area, Iwate prefecture, Japan. We have also deployed conventional one-dimensional (1D) interpretation methods for the same airborne Previous HittimeNext Hit-Previous HitdomainTop EM data. It was demonstrated that the models recovered from 3D inversion agreed reasonably well with the structure interpreted using land EM survey data and resistivity-log data. It was also demonstrated that the conventional 1D method can help interpreting the structure of the survey area preliminary in relatively short time. There are typical relationships between resistivity and geological structures found over a known geothermal area. The airborne EM survey and its data interpretation have proven to be effective for the exploration of geothermal resources.