Identification of Shale Gas Existence Based on 2-Dimensional Magnetotelluric Data in the Kutai Basin, East Kalimantan, Indonesia Santi Nanda Putri(a), Shofi Iqtina Hasan(b), Cahyo Aji Hapsoro(a*), Yoyok Adisetio Laksono(a)
a) Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Jalan Semarang 5, Malang, East Java 65145, Indonesia.
b) Center for Geological Survey, Geological Agency of Indonesia, Ministry of Energy and Mineral Resources, Indonesia, Jalan Diponegoro No. 57, Bandung 40122, Indonesia.
Abstract
Research on unconventional methods in the shale gas exploration process has begun to be developed to meet the demand for oil and natural gas sustainability. The research area is located in the Kutai Basin, East Kalimantan, Indonesia. The current study from Center for Geological Survey show that the Kutai Basin has 46.79 TCF of shale gas potential. The Magnetotelluric (MT) method was applied in this study to describe distribution of subsurface resistivity values. The inversions scheme performed in MT method are 1-dimensional and 2-dimensional inversions. In this study, there are 8 measurement stations in 1 line. The presence of low resistivity values or conductive zones identifies the potential for black shale layers. The potential for shale gas is suspected to be detected at station KT29 which is included in the Pamaluan Formation and at stations KT12, KT31, KT13, and KT15 which are included in the Pulaubalang Formation because it is associated with source rock from petroleum in the Kutai Basin system supported by previous research data.
Keywords: Unconventional oil and Gas- Shale Gas- Magnetotelluric- Kutai Basin
