Geoelectric Structure of the Hatchobaru Geothermal Field and the Adaptability of Electrical Exploration Methods for Its Understanding

Abstract

Electrical and Electromagnetic methods such as CSAMT and methods have been applied in the Hatchobaru geothermal field, and are proved to be effective not only for understanding geothermal structure but also for the selection of drilling target. These methods were carried out by wellaeshed points and lines which were installed mostly at the interval of to in the area. This paper describes the features of geoelectric structure in and around geothermal reservoir in Hatchobaru on the basis of comparison results obtained from drilling data and these geoelectrical data. In addition, the adaptability of each method for geothermal exploration will be discussed in relation to the structure of the Hatchobaru geothermal field.