Magnetotelluric (MT) Data Analysis and 2D Modeling of the Kutai Basin, Indonesia: Preliminary Results

Irawati, Selvi Misnia; Hidayat, H.; Grandis, Hendra

doi:10.3997/2214-4609.201900406

Cited by 2 publications

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“…Therefore, we set up four profiles for 2D modeling oriented perpendicular to the estimated strike direction (Figure 4). Detailed results of the preliminary analysis can be found in Irawati, et al [14]. We performed 2D inversion of the MT data by using the well-known WinGLink software from Geosystem, which implements the Non-Linear Conjugate Gradients (NLGC) algorithm [15,16].…”

Section: Mt Data Modelingmentioning

confidence: 99%

Integrated Magnetotelluric (MT), Gravity and Seismic Study of Lower Kutai Basin Configuration

Irawati¹,

Wang²,

Wijanarko³

et al. 2022

J. Eng. Technol. Sci.

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This work describes a subsurface basin configuration of the Lower Kutai Basin (hereinafter LKB) in East Kalimantan, Indonesia, as inferred from combination of magnetotelluric (MT), seismic, and gravity data. LKB is structurally controlled mainly by the Samarinda Anticlinorium extending in a NNE-SSW direction and is one of the most prolific hydrocarbon basins in Indonesia. The phase tensor analysis of MT data from most stations and frequencies exhibited a 2D character with a relatively low skew (-3° < β < 3°). The geo-electrical strike direction was estimated at N30°E, which is in good agreement with the regional geological strike with a NNE-SSW direction. 2D MT inversion modeling was performed to infer the subsurface resistivity distribution associated with LKB’s configuration. From the integration of MT, seismic and gravity models it was shown that LKB’s configuration is composed mainly of sandstone, black shale, claystone, and basement rocks. The conductive zones of the MT models are associated with thermal alteration of black shale, which changes its mineralization, leading to lower resistivity. Hence, the black shale may be interpreted as potential hydrocarbon source rock in LKB.

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Section: Mt Data Modelingmentioning

confidence: 99%

Integrated Magnetotelluric (MT), Gravity and Seismic Study of Lower Kutai Basin Configuration

Irawati¹,

Wang²,

Wijanarko³

et al. 2022

J. Eng. Technol. Sci.

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Identification of shale gas existence based on 2-dimensional magnetotelluric data in the Kutai basin, East Kalimantan, Indonesia

Putri,

Hawan,

Hapsoro

et al. 2024

J. Phys.: Conf. Ser.

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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 the Geological Survey Center shows that the Kutai Basin has 46.79 TCF of shale gas potential. The magnetotelluric (MT) method was applied in this study to describe the distribution of subsurface resistivity values. The inversion schemes performed in the MT method are 1-dimensional and 2-dimensional inversions. In this study, there are 8 measurement stations in one 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, as supported by previous research data.

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Magnetotelluric (MT) Data Analysis and 2D Modeling of the Kutai Basin, Indonesia: Preliminary Results

Cited by 2 publications

References 0 publications

Integrated Magnetotelluric (MT), Gravity and Seismic Study of Lower Kutai Basin Configuration

Integrated Magnetotelluric (MT), Gravity and Seismic Study of Lower Kutai Basin Configuration

Identification of shale gas existence based on 2-dimensional magnetotelluric data in the Kutai basin, East Kalimantan, Indonesia

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