Abstract
Presently in the fields of civil engineering and resources development engineering, it is an important theme to grasp precisely existence of underground fractures or sheared faults.
In development of geothermal resource, it is neccesary to estimate mechanism of heat and water supply in a wide area, and scale and shape of a geothermal reservoir in the area. In order to estimate potentiality of geothermal energy as hydrothermal convection system, it is important to know permeability of the geothermal reservoir. In the case of a fracture-type geothermal reservoir, existence of fracture system in which geothermal fluids flow or are reserved must be paid attention. Therefore it is important to judge superior directions of fracture system.
In this study, it is tried to illustrate superior directions of fracture system on which permeability of geothermal reservoir depends, by the technique for making clear relations between geothermal wells based on pressure interference tests carried out in certain geothermal district and displaying them as parallel projected graphic pictures. If such visual information is combined to other analytical results, more accurate estimation and reliable results can be obtained.
