Identification of "WS" geothermal field system by analyzing TE, TM, and TE-TM of 2D magnetotelluric inversion models

Triana Triana  -  Physics Undergraduate Study Program, Department of Physics, Universitas Diponegoro, Indonesia
Tony Yulianto  -  Department of Physics, Universitas Diponegoro, Indonesia
*Udi Harmoko scopus  -  Department of Physics, Universitas Diponegoro, Indonesia
Iqbal Takodama  -  Pusat Sumber Daya Mineral Batubara dan Panas Bumi, Indonesia
Received: 9 Apr 2019; Accepted: 30 May 2019; Published: 20 Jun 2019; Available online: 12 Jun 2019.
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Magnetotelluric data has been carried out at the "WS" geothermal field to analyze the resistivity model resulting from 2D inversion of magnetotelluric data in TE, TM and TE-TM modes. Base on the three models produced, the mode is determined to produce the most representative model to assist in the interpretation of the "WS" geothermal system. There is a step of modes separation, namely TE (Tranverse Electric) and TM (Transverse Magnetic) modes in processing MT data. Each mode produces a 2D model with different conductivity properties. The analysis results of the three modes explain that TE mode is dominated by low resistivity with a range of values of 10-35 Ωm and medium resistivity with a value range of 35-250 Ωm and a vertical resistivity contrast. The TM mode describes the high resistivity in the Southwest and the center of the track with a value of more than 470 sehinggam resulting in lateral resistivity contrast. While the TE-TM mode produces a model that is not much different from TM mode, only the distribution of the resistivity value is a combination with TE mode. This mode describes the distribution of resistivity both vertically and laterally. Based on the analysis of the three modes, it can be concluded that the TE-TM mode is the mode that produces the most representative model. Interpretation model shows that from the TE-TM mode we have a low resistivity distribution (10-35 Ωm) represent a cap rock zone, reservoir rock with a medium resistivity distribution (35-380 Ωm), resistive zone with a high resistivity distribution (more than 380 Ωm), and the existence of the three of faults structures ro be a controller system of the "WS" geothermal.

Magnetotelluric;Geothermal system;TE mods (Transverse Electric);TM mode (Transverse Magnetic)

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  1. Simpson, F. dan Bahr, K, 2005, Practical Magnetotellurics, University Press, Cambridge.
  2. Daud, Y., 2010, Electromagnetic Method : Success Story in Geothermal Exploration & Possibility for Hydrocarbon Exploration. Diktat Kuliah : Depok.
  3. Cherkose, B.A. dan Mizunaga, M., 2018, Resistivity Imaging of Aluto-Langano Geothermal Field Using 3-D Magnetotelluric Inversion, Journal of African Earth Science, 139, 307-318.
  4. Leeuwen, W.A., 2016, Geothermal Exploration Using The Magnetotelluric Method, Faculty of Geosciences, Netherlands.
  5. Unsworth, M.J., 2008, Lecture Notes Geophysics 424, University of Alberta, Kanada.
  6. Niasari, S.W., 2015, Magnetotelluric Investigation of the Sipoholon Geothermal Field, Indonesia, Disertasi, Fachbereich Geowissenschaften der Freien Universität Berlin.
  7. Rahadinata, T., dan Sugianto, A., 2014, Survei Magnetotelurik dan TDEM Daerah Panas Bumi Way Selabung Kabupaten Oku Selatan, Provinsi Sumatera Selatan, Jurnal PSDG, Kelompok Penyelidik Bawah Permukaan, PSDG.
  8. Annailah, E.F., 2018, Analisis Pemodelan Inversi 2D Mode Polarisasi TE, TM dan TE-TM pada Data Magnetotellurik Daerah Panas Bumi “EFA”, Skripsi, Jurusan Teknik Geofisika, Fakultas Teknologi Mineral, Universitas Pembangunan Nasional “Veteran”, Yogyakarta.
  9. Berdichevsky, M.N. dan Dmitriev, V.I., 2008, Models and Method of Magnetotelluric, Springer, Verlag, Berlin.
  10. Wibowo, M.G.A., 2013, Pendekatan Inversi 1D untuk Mengurangi Efek Galvanic pada Model 2D Magnetotellurik Daerah Panas Bumi Danau Ranau, Jurnal Geofisika Eksplorasi, Universitas Negeri Lampung. Vol 1, No 02.
  11. Simamarta, R.S.L. dan Munandar, A., 2015, Survei Landaian Suhu Sumur WSL 1, Jurnal PSDG, Kelompok Penyelidik Panas Bumi, PSDG