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Geothermal reservoir prediction using electrical resistivity maps: A case study of Lili Sepporaki Indonesia

Author

Listed:
  • Denis Muteb

    (Faculty of Geological Engineering, Universitas Padjadjaran, Jalan Raya Bandung-Sumedang, Indonesia)

  • Andi Agus Nur

    (Faculty of Geological Engineering, Universitas Padjadjaran, Jalan Raya Bandung-Sumedang, Indonesia)

  • Agus Didit Haryanto

    (Faculty of Geological Engineering, Universitas Padjadjaran, Jalan Raya Bandung-Sumedang, Indonesia)

  • Joni Wiwid

    (Department of Geophysics, Centre for Minerals, Coal and Geothermal Resources (PSDMBP), Soekarno-Hatta, Bandung, Indonesia)

  • Michael Kazinda

    (WE Consult, Plot 41 Lake Drive, Luzira Kampala, Uganda)

Abstract

The objective of this study is to predict the location of the geothermal reservoir through interpretation of Magnetotelluric depth-resistivity maps, with reference to Lili-Sepporaki geothermal area. Lili-Sepporaki is a non- magmatic prospect located in Polewali Mandar, Western Sulawesi-Indonesia. The study area is dominated by andesitic to trachytic to trachytic tertiary volcanic products. The only thermal manifestations in the area are the hot springs and rock alterations. Previous geochemical studies found out the hot spring water has temperature of 98oC and the reservoir temperature of 190oC. A big portion of the surface rocks are weathered and hydrothermally altered owing to findings from magnetic and Bouguer gravity surveys. This research utilized two-dimensional magnetotellurics data to locate resistivity anomalies in the subsurface. MT data was processed using SSMT2000 and MTEditor software programs while WinGLink software was used in the interpretation of the data. Four resistivity maps were obtained, each corresponding to one of the depths: 500 m; 1000 m; 1500 m; and 2000 m. There is a general sharp reduction in resistivity as opposed to the conventional resistivity of fresh igneous rocks. Analysis shows that the reservoir appears between depths of 1000 m and 2000 in different parts of the survey area, with prospect boundaries located in the South, South West and South East. A three-dimensional MT data analysis and exploration drilling are recommendable in order to get a detailed geothermal model.

Suggested Citation

  • Denis Muteb & Andi Agus Nur & Agus Didit Haryanto & Joni Wiwid & Michael Kazinda, 2019. "Geothermal reservoir prediction using electrical resistivity maps: A case study of Lili Sepporaki Indonesia," Journal of Applied and Physical Sciences, Prof. Vakhrushev Alexander, vol. 5(3), pages 73-80.
    • Handle: RePEc:apb:japsss:2019:p:73-80
    DOI: 10.20474/japs-5.3.1
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    References listed on IDEAS

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    1. Sheripzhan Nadyrov & Galina Geldyeva & Gulnara Nussupova & Aizhan Skakova, 2016. "Geographical Aspects of Organizing Natural Resource Management Structure in Kazakhstani Section of a New Economic Zone of the Silk Road," International Journal of Applied and Physical Sciences, Dr K.Vivehananthan, vol. 2(3), pages 59-64.
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