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All Journal Jurnal Penelitian Fisika dan Aplikasinya (JPFA) JGE (Jurnal Geofisika Eksplorasi) Indonesian Journal of Energy Computational and Experimental Research in Materials and Renewable Energy (CERiMRE) Journal of Engineering Environtmental Energy and Science
Gunawan, Belista
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Astronomy Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Earth & Planetary Sciences Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics

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2D INVERSION MODELING OF OIL AND GAS BASINS USING GRAVITY DATA IN TAMBELANG DISTRICT Gunawan, Belista; Permana, Nanda Ridki
JGE (Jurnal Geofisika Eksplorasi) Vol 10, No 2 (2024)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v10i2.421

Abstract

Pertamina Hulu Energi discovered a new source of oil and gas reserves in Tambelang, Bekasi Regency, which was named East Pondok Aren (EPN-001). These oil and gas reserves have great potential based on the oil flow test in the second Drill Stem Test. The drill data needs to be correlated with other supporting data such as geophysical methods to ensure the accuracy. Therefore, this research was conducted to examine the subsurface structure of oil and gas reserves in EPN-001 through 2D inversion modeling using the gravity method. Gravity satellite data was taken via the GGMPlus website with a total of 23,898 data in the form of gravity disturbance, geoid, and topography, so only terrain and bouguer corrections were carried out to get the Complete Bouguer Anomaly value. The research results show low anomaly values from -0.4463 – (-0.0339) mGal which are thought to be associated with alluvium lithology and the Lower Cibulakan Formation. In the 2D model, it can be seen that the drilling point in the Lower Cibulakan Formation layer has a density contrast value of -0.002 – 0.001 g/cc at a depth of 2590 m, and is known to be a reservoir that stores hydrocarbon reserves in the research area.
Identification of Geothermal Potential in Block Ciasmara Sector II, Mount Salak Area, Based on the Correlation of the Active Directory Magnetotelluric (ADMT) and Self-Potential Methods Permana, Nanda Ridki; Fadrian, Dhika Faiz; Gunawan, Belista; Primastika, Ayu Alvita; Zani, Fardhan Rafshan; Rahman, Fadhlur; Binonkan, Zahra Prameswari; Subekti, Faris Fawwas; Melly, Melly; Bahagia, Tazkia Izdihar; Harist, Ahmad Rizieq
Computational And Experimental Research In Materials And Renewable Energy Vol 6 No 2 (2023): November
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/cerimre.v6i2.43848

Abstract

Indonesia possesses significant geothermal potential, with the largest share located in West Java, accounting for up to 21.7% distributed across 44 locations in 11 regencies. One such location with geothermal potential is in Block Ciasmara Sector II, the Mount Salak area, Bogor Regency, characterized by manifestations such as hot spring bathing pools. This research aims to understand the distribution of geothermal reservoirs in the study area, where these reservoirs contain hot fluids that can be harnessed for renewable energy generation. The methodology used in this research involves a correlation between the Active Directory Magnetotelluric (ADMT) and Self-Potential (SP) methods. A total of 3 ADMT measurements were conducted along tracks ranges from 5-8 meters, while the SP method involved 7 measurement points with coordinates distributed around the geothermal manifestations in the Mount Salak area. The data obtained were then visualized in 2D and 3D to gain insights into the distribution and orientation of the reservoir layers in the study area. The results indicate a correlation between the ADMT and Self-Potential methods. In Line 01 of the ADMT, located in the western part, there is a correlation with high potential difference values on the SP map ranges from 47.6-82.1 mV, suggesting the presence of tuff layers rich in alteration minerals. This is confirmed by the 2D ADMT modeling, which shows that the clay cap is thicker compared to Line 02 and Line 03, associated with the presence of alteration minerals in the clay cap. This correlation also applies to Line 03, which has low potential difference values ranges from 4.9-25.3 mV, indicating a response from lapilli rocks. This is corroborated by the 2D model, which reveals thickening of the lapilli rock layer on Line 03.Keywords: ADMT, Geothermal, Mount Salak, Reservoir, Self-Potential.
Estimations of the Geothermal Energy Potential in The Mount Anak Krakatau Region Based on Derivative Analysis and 3D Model of Gravitational Satellite Data Gunawan, Belista; Permana, Nanda Ridki
Indonesian Journal of Energy Vol. 7 No. 1 (2024): Indonesian Journal of Energy
Publisher : Purnomo Yusgiantoro Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33116/ije.v7i1.186

Abstract

Geothermal energy is a source of renewable energy that has the potential to be produced, considering that Indonesia is in the ring of fire, where there are many volcanoes, one of which is Mount Anak Krakatau. Even though direct exploration is not permitted, at least information on the geothermal system on the mountain can still be obtained using satellite data. Therefore, this study aims to analyze the geothermal energy potential of Mount Anak Krakatau using gravity satellite data with a total of 320 data consisting of gravity disturbance, geoid, and Digital Elevation Model. The data processing describes a 3D model that is correlated with the First Horizontal Derivative (FHD) and Second Vertical Derivative (SVD) analysis. Based on the results of the residual anomaly map analysis, the low anomaly has a value of -1.85–(-0.89) mGal which is suspected to be associated with magma pockets, and the high anomaly ranges from 0.04–2.13 mGal which is suspected to be associated with the caldera of Mount Anak Krakatau. Based on the results of the FHD and SVD graphical analysis, there are 18 faults that control the geothermal system. Based on the results of 3D modeling trending from west-east it can be seen that there is a clay cap layer with a value density 2.32–2.37 gr/cc at depths of 0–550 m and reservoir layers with density values of 2.23–2.29 gr/cc at depths of 500–1100 m. This geothermal research using the gravity method can be developed and become a reference for future research to calculate the potential for electrification in a research area.
Identifikasi Pemodelan 2D dan Suhu Permukaan Daerah Panas Bumi Gunung Gede-Pangrango, Jawa Barat menggunakan Metode Gravitasi Gunawan, Belista; Anjani, Aprilia; Anjalni, Ariska
Journal of Engineering Environtmental Energy and Science Vol. 1 No. 1 (2022): January 2022
Publisher : LPPMP Universitas Bhayangkara Jakarta Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31599/q44a0603

Abstract

Pertumbuhan penduduk dan industri yang meningkat, menyebabkan kebutuhan energi listrik meningkat. Hal ini dapat dilakukan dengan memanfaatkan energi panas bumi yang ramah lingkungan, dengan melihat kondisi geografis Indonesia yang dilalui oleh cincin api. Salah satu daerah yang memiliki potensi panas bumi adalah Gunung Gede-Pangrango, Jawa Barat. Oleh karena itu, sebuah penelitian dilakukan untuk menentukan struktur batuan yang menyusun sistem panas bumi daerah tersebut menggunakan gravity method, dan untuk melihat suhu permukaan area panas bumi menggunakan Suhu Permukaan Tanah (LST), adalah daerah panas bumi memiliki suhu 34,76 oC – 46,55 oC. Dalam mengolah data gravitasi, nilai yang diperoleh CBA kemudian dipisahkan menggunakan filter Butterworth dan pemodelan 2D menggunakan forward modelling. Interpretasi kualitatif menunjukkan distribusi panas bumi di daerah dengan nilai anomali tinggi mulai dari 318 mGal – 537,9 mGal. Sementara interpretasi kuantitatif menghasilkan dua pemodelan 2D cross-sectional tren SW-NE (Southwest-Northeast) dan NW-SE (Northwest-Southeast) yang terdiri dari 4 lapisan batuan. Lapisan kedua bagian terdiri dari aluvium sebagai caprock dengan nilai kepadatan 1,55 gr / c, m-3. dan 1,5 gr/c,m-3.. Tuff breccia dengan nilai kepadatan 2,73gr/,cm-3. dan 2,55 gr/c,m-3. sebagai waduk. Basaltik dengan nilai kepadatan 2,99 gr / c, m-3. dan 2,84 gr/,cm-3. sebagai basement. Dan basal andesit dengan kepadatan nilai 2,54 gr / c, m-3. dan 2,73 gr/c,m-3. sebagai sumber panas.
Distribution of Geological Structures on Java Island Based on Derivative Analysis of Satellite Gravity Data Permana, Nanda Ridki; Fadrian, Dhika Faiz; Gunawan, Belista; Wulandari, Amara
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 14 No. 2 (2024)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v14n2.p154-168

Abstract

The island of Java is an interesting place to study geology because of the various tectonic processes that occur starting from volcanic activity, changes in relief, and the relative movement of faults. The aim of this research is to determine the distribution of geological structures spread throughout Java Island based on fault analysis from gravity satellite data. Gravity data was taken via the ICGEM website with a data resolution of 2 km so that 10,000 data were obtained consisting of gravitational disturbances (GD), geoid, and Digital Elevation Model (DEM). The data processing results represent weak zones on the residual anomaly map where fault movement occurs with low anomaly values, namely -55,147 – (-27,175) mGal which stretches from West Java to southern Madura. On the FHD map, it can be seen that the distribution of maximum gravity anomalies is quite numerous and complex with an anomaly value of 1117.18 mGal. It is suspected that the fault near the mountain occurred due to volcanic processes and the southern part occurred due to the shifting process of the Indo-Australian plate and the Eurasian plate. On the TDR map, the weak zones caused by faults spread across Java Island have low gravity anomaly values ranging from -1,353 – (-0.833) mGal. In the Banten to West Java area there are the Baribis Fault and the Cimandiri Fault. In the Central Java region there are the Ajibarang, Ungaran, Baribis Kendeng and Pati faults, as well as parts of the Special Region of Yogyakarta there is the Opak fault. Meanwhile, in the East Java area there are the Baribis Kendeng, Pasuran and Probolinggo faults.
Co-Authors Anjalni, Ariska Anjani, Aprilia Bahagia, Tazkia Izdihar Binonkan, Zahra Prameswari Fadhlur Rahman, Fadhlur Fadrian, Dhika Faiz Harist, Ahmad Rizieq Melly, Melly Permana, Nanda Ridki Primastika, Ayu Alvita Subekti, Faris Fawwas Wulandari, Amara Zani, Fardhan Rafshan