Modeling and Interpretation of Geothermal System Components Using The Magnetotelluric (MT) Method at The “X” Geothermal Field

Authors

  • Mochammad Malik Ibrahim Departement of Geological Engineering, Sriwijaya University, Palembang, INDONESIA. https://orcid.org/0000-0002-7764-0191
  • Sundus Ghaida Noor Azizah Departement of Geological Engineering, Sriwijaya University, Palembang, INDONESIA.
  • Pri Utami Departement of Geological Engineering, Faculty of Engineering, Gadjah Mada University, Yogyakarta, INDONESIA.
  • Imam Baru Raharjo Departementof Geophysics Engineering, Faculty of Engineering, Pertamina University, Jakarta, INDONESIA.
  • Muhammad Fahmi Departement of Physics, Diponegoro University, Semarang, INDONESIA.

DOI:

https://doi.org/10.22452/mjs.vol45no3.7

Keywords:

Geothermal field , magnetotelluric (MT) method, resistivity cross-section, geothermal system components

Abstract

In North Sulawesi Province, Geothermal field "X" stands as one of the geothermal sites under the management of PT Pertamina Geothermal Energy. This investigation employs the magnetotelluric (MT) technique to explore the existence of geothermal system elements beneath the surface. The (MT) method is processed by adjusting the rotation angle and correcting static effects. Interpretation of data on resistivity anomalies and resistivity cross sections can display patterns and variations in resistivity horizontally and vertically as a function of depth. The results of the horizontal distribution of the resistivity anomaly show that the research area formed a conductive rock layer and a small resistive rock layer (1–33 Ωm). The interpretation of the resistivity cross-section based on the classification of the resistivity value is composed of 3 (three) rock layers: the caprock layer (≤ 10 Ωm), reservoir rock layer (30–80 Ωm), and intrusive rock layer as a heat source (≥ 100 Ωm).

References

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Published

30-09-2026

Issue

Vol. 45 No. 3 (2026)

Section

Original Articles

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