Modeling of Reservoir Structure by Using Magnetotelluric Method in the Area of Mt. Argopuro, East Java, Indonesia
DOI:
https://doi.org/10.5614/j.eng.technol.sci.2017.49.6.9Keywords:
altered rock, magnetotelluric, Mt. Argopuro, reservoir, resistivity.Abstract
The purpose of this study was to review a regional geothermal system by applying the magnetotelluric method, which is one of the geophysical methods that can be used to map subsurface resistivity structures. This method uses electromagnetic waves of natural resources, namely the interaction of the sun (solar wind) and lightning activity on earth. This study used an inverse modeling method, i.e. the non-linear conjugate gradient method, to estimate the resistivity value as a function of depth at points of sounding, while 2-dimensional modeling was used to describe the distribution of the resistivity values laterally or vertically on a trajectory of measurements. Data were collected from the area of Mt. Argopuro, East Java, where the magnetotelluric method has not been applied before. A geothermal system was found under Mt. Argopuro consisting of altered rock, reservoirs and hot rock with sources of heat associated with high resistivity values (1024 ohm.m). The area has potential for geothermal energy exploration in the future.Downloads
References
Hadi, A.I., Refrizon & Suhendra, Estimation of Subsurface Structure in Regional Prospect Geothermal, Hulu Lais Volcano, North Slope, by using Magnetic Method, Jurnal Fisika FLUX, 7(1), pp. 13-23, 2010. (Text in Indonesian)
Darma, S., Harsoprayitno, S., Setiawan, B., Sukhyar, R., Hadyanto, Soedibjo, A. W., Ganefianto, N. & Stimac, J., Geothermal Energy Update: Geothermal Energy Development and Utilization in Indonesia. Proc. World Geothermal Congress to reflect the world trust, Indonesian Geothermal Association News, February 2010.
Reynolds, J.M., An Introduction to Applied and Environmental Geophysics Second Edition, United Kingdom, John Wiley & Sons Ltd, 2011.
Bera, P. & Rao, C.K., Magnetotelluric Method: A Tool for Deep Crustal Study, 9th Biennial International Conference & Exposition on Petroleum Geophysics, pp. P-068, Mumbai: Society of Petroleum Geophysicists India, 2012.
Widarto, D.S., Magnetotelluric Method in Exploration Geophysics: Basic Theory, Acquisitions, Processing, Modeling, and Case Study, Unpublished Manuscript, Indonesian Institute of Science, 2008. (Text in Indonesian)
Cagniard, L., Basic Theory of The Magnetotelluric Method of Geophysical Prospecting, Geophysics, 18(3), pp. 605-635, 1953.
Tikhonov, S.A, Determination of the Electrical Characteristics of the Deep Layers of the Earth's Crust, Doklady Akad. Nauk, SSSR, 73(2), 295-2897, 1950.
Simpson, F. & Bahr, K., Practical Magnetotellurics, Cambridge University Press, United Kingdom, 2005.
Lowrie, W., Fundamentals of Geophysics Second Edition, Cambridge University Press, United Kingdom, 2007.
East Java Geothermal Investigation Team, Geological Survey, Geochemistry and Geophysics Integrated Geothermal Region Iyang Argopuro - Probolinggo District - East Java, Geological Resource Center, Bandung, Indonesia, 2002.
Nainggolan, S.S., Sastranegara, R.M.T, & Raharjo, I.B., Volcanic Neck of Mount Iyang Argopuro Revealed From Gravity Study, Proceedings World Geothermal Congress, 19-25 April 2015, Melbourne, Australia, 2015.
Pabhataputra, A., Parnadi, W.W., Rahadinata, T. & Widodo, Overview of Geothermal Prospect with Magnetotelluric Application in Mt. Batur, Bali, International Conference on Recent Developments and Concepts for the Sustainable Exploitation of Geothermal Resources in Indonesia in Bandung Institute of Technology, 2013.
Griffith, D.J., Introduction to Electrodynamics 3rd Ed., United States, Prentice Hall, 1999.
Telford, W.M., Geldart, L.P. & Sheriff, R.E., Applied Geophysics Second Edition, New York, United States, Cambridge University Press, 1990.
Kearey, P., Brooks M. & Hill, I., An Introduction to Geophysical Exploration 3rd Edition, Untied States, Blackwell Science, 2002.
Palacky, G.J., Resistivity Characteristics of Geological Targets in Nabighian, M. (ed.), Electromagnetic Methods in Applied Geophysics, Society of Exploration Geophysicists, Tulsa Oklahoma, 1(3), pp. 53-29, 1987.
Meju, M.A., Geophysical Data Analysis: Understanding Inverse Problem Theory and Practice, Society of Exploration Geophysicists, 1994.
Vozoff, K., The Magnetotelluric Method in Nabighian, M. (ed.), Electromagnetic Methods in Applied Geophysics, 2(B), Society of Exploration Geophysicists, Tulsa Oklahoma, pp. 641-711, 1991.
Rodi, W. & Mackie, R.L., Non-Linear Conjugate Gradient Algorithm for 2-D Magnetotelluric Inversion, Society of Exploration Geophysicists, 66(1), pp. 174-187, 2001.
Xiao, W., Magnetotelluric Exploration in the Rocky Mountain Foothills Alberta, Master Degree Thesis, University of Alberta, Canada, 2004.
Sulistyo, A., Static Shift Correction of Magnetotelluric Data (MT) using Geostatistical Method, Averaging, and Time-domain Electromagnetic, Bachelor Degree Thesis, Depok, Indonesia, University of Indonesia, 2011.
White, D.E., Some Principles of Geyser Activity, Mainly from Steamboat Springs, Nevada, A. J. Sci., 265(8), pp. 641-684, 1967.
Ushijima, K., Mustopa, J.E., Jotaki, H., & Mizunaga, H., Magnetotelluric Soundings in the Takigami Geothermal Area, Japan, Proceedings World Geothermal Congress, Antalya, Turkey, 2005.
Boonchaisuk, S., Vachiratienchai, C. & Siripunvaraporn, W., Two Dimensional Direct Current Resistivity Inversion: Data Space's Occam Approach, Physics of the Earth and Planetary Interiors, 168(3-4), pp. 204-211, 2008.
Chen, X. & Yan, J., 2D Magnetotelluric Imaging of The Anqing-Guichi ore District, Yangtze Metallogenic Belt, Eastern China: An Insight into The Crustal Structure and Tectonic Units, Physiscs of the Earth and planetary Interiors, 257, pp. 1-11, 2016.
Zbinden, D., Inversion of 2D Magnetotelluric and Radiomagnetotelluric Data with Non-Linear Conjugate Gradient Techniques, Department of Earth Sciences Uppsala University, 2015.
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