THE CHARACTERISTICS OF BASE OF CONDUCTOR IN X GEOTHERMAL FIELD BASED ON THE MAGNETOTELLURIC AND WELL DATA
KARAKTERISTIK BASE OF CONDUCTOR DI LAPANGAN PANAS BUMI X PULAU FLORES BERDASARKAN DATA MAGNETOTELLURIK DAN SUMUR EKSPLORASI
Abstract
The X Geothermal Field in Flores, East Nusa Tenggara, has surface thermal manifestations such as hot springs, fumaroles, and alteration rocks, which indicate potential geothermal resources. This research aims to model and characterize the base of the conductor in X geothermal field as a supporting data for geothermal exploration studies. The modeling was performed using 3D magnetotelluric inversion analysis that was correlated with well data, i.e, drill cuttings, methylene blue, and Pressure and Temperature Test. According to the results, the subsurface condition of the study area consists of an argillic zone around 400-300 masl, a transition zone around 300 and 0 masl, and a propylitic zone below 0 masl. At an elevation of 400-300 masl, the base of conductor marks the boundary between the reservoir and the clay cap. The BOC distribution map reveals that the average BOC elevation is between 300 and 550 meters above sea level. The exploration potential is in the northern part with a prospect area of 3,4 km2 in research.
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References
Arisbaya, I., Aldinofrizal, A., Sudrajat, Y., Gaffar, E. Z., and Harja, A. (2018): Model Sistem Panas Bumi Lapangan Karaha - Talaga Bodas Berdasarkan Inversi 2D Data Magnetotellurik, RISET Geologi Dan Pertambangan, 28(2), 221. https://doi.org/10.14203/risetgeotam2018.v28.989
Axelsson, G., Flovenz, O. G., Hauksdottir, S., Hjartarson, A., and Liu, J. (2001): Analysis of tracer test data, and injection-induced cooling, in the Laugaland geothermal field, N-Iceland, Geothermics, 30(6), 697–725. https://doi.org/10.1016/S0375-6505(01)00026-8
Binsar, M. T. A., Aribowo, Y., and Widiarso, D. A. (2017): Geologi, Alterasi Hidrotermal dan Mineralisasi Daerah Ciurug dan Sekitarnya, Kecamatan Nanggung, Kabupaten Bogor, Provinsi Jawa Barat, Journal of Chemical Information and Modeling, 8(9), 1–58.
commons.wikimedia.org. (2010,September 11). Topographical map of Flores, Indonesia. Created with GMT from SRTM data. Retrieved September 20, 2022,from https://commons.wikimedia .org/wiki/ File:Flores_Topography.png
Cumming, W. (2016): Resource conceptual models of volcano-hosted geothermal reservoirs for exploration well targeting and resource capacity assessment: Construction, pitfalls and challenges, Transactions - Geothermal Resources Council, 40, 623–637.
Daud, Y., Rosid, M. S., Fahmi, F., Yunus, F. M., and Muflihendri, R. (2018): Joint interpretation of magnetic and magnetotelluric method to identify promising zone in Blawan-Ijen geothermal area, AIP Conference Proceedings, 2023(2018). https://doi.org/10.1063/1.5064272
Daud, Yunus, Nuqramadha, W. A., Fahmi, F., Sesesega, R. S., Fitrianita, Pratama, S. A., and Munandar, A. (2019): Resistivity characterization of the Arjuno-Welirang volcanic geothermal system (Indonesia) through 3-D Magnetotelluric inverse modeling, Journal of Asian Earth Sciences, 174(February), 352–363. https://doi.org/10.1016/j.jseaes.2019.01.033
Fauziyah, Y. H., and Daud, Y. (2019): Reconstruction of Conceptual Model in Mataloko Geothermal Field (Nusa Tenggara Timur), Journal of Physics: Conference Series, 1341(8). https://doi.org/10.1088/1742-6596/1341/8/082042
Gunderson, R., Cumming, W., Astra, D., and Harvey, C. (2000): Analysis of smectite clays in geothermal drill cuttings by the methylene blue method : for well site geothermometry and resistivity sounding correlation, Proceedings World Geothermal Congress, 1175–1181.
Hamilton, W. (1973): Tectonics of the Indonesian Region NOT FUL TEXT, Geological Society of Malaysia, Bulletin, 6(July), 3–10.
Harvey, C., Anderson, E., Johnstone, R., Zealand, N., and Baru, K. (2000): Co-existing volcanism and hydrothermal activity at kelimutu, flores island, eastern indonesia, Development, 1195–1200.
Iskandar, C., and Daud, Y. (2022): Correlation Between 3-D Magnetotelluric Inversion Model With Drilling Data In Patuha Geothermal Field, 51–64 in Buletin Sumber Daya Geologi Volume.
Sarmiento, Z. F., Sagala, B., and Siagian, H. (2019): The Sokoria Geothermal System, Flores Island, Indonesia, Geothermics, 82 (December 2018), 282–295. https://doi.org/10.1016/j.geothermics.2019.07.003
Simpson, F., and Bahr, K. (2005): Practical magnetotellurics, Practical Magnetotellurics, 9780521817(July), 1–254. https://doi.org/10.1017/CBO9780511614095
Syafitri, S., and Putra, A. (2018): Penentuan Zona Caprock di Sekitar Gunung Talang Menggunakan Metode Resistivitas Konfigurasi Wenner, Jurnal Fisika Unand, 7(3), 253–259. https://doi.org/10.25077/jfu.7.3.253-259.2018
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