1-D INVERSION OF MAGNETOTELLURIC DATA FOR GEOTHERMAL APPLICATIONS

• Main Author: Purnama, Deri
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/61041
• Institution: Institut Teknologi Bandung

The development of geothermal energy in the world is increasing. This is due to the need for energy for daily life. Because of these conditions, it is necessary to increase the supply of energy other than energy derived from fossils. Geothermal energy is an alternative way of providing environmentally friendly renewable energy. Indonesia itself has a large potential and reserves of geothermal energy. The magnitude of Indonesia's geothermal potential is due to Indonesia's geographical location, which is in an area that is passed by the Pacific Ring of Fire. The area has many active volcanoes, so there is a lot of volcanism in it. There are several methods used in geothermal exploration. However, the most frequently used is the MT method. The magnetotelluric (MT) method uses fluctuations in the earth's natural magnetic field that induces an electric field. By measuring the electric and magnetic fields at the earth's surface, we can determine the conductivity below the earth's surface. The MT method itself has the advantage of deep penetration (thousands of kilometers) and is sensitive to conductive layers. The stages in the magnetotelluric method are: data acquisition, data discovery, and data interpretation. In this study, the direct stage starts from the start of the data in the SSMT 2000 software for the preparation of time series data into a fourier transform, namely changing the time domain into a frequency domain. Then the next step is to select cross power in the MT Editor. The result of this MT Editor is to get the apparent resistivity and phase. The next step is data inversion in Interpex- 1D (IX1D) software to get the resistivity response to depth. After that, modeling the 1D resistivity to depth for each measurement point using MATLAB software.