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Rahmiati
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rahmiati@fmipa.unmul.ac.id
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+6281355258687
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kutaibasin@fmipa.unmul.ac.id
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Jalan Barong Tongkok No.4 Gunung Kelua Samarinda, East Kalimantan Province Indonesia - 75123
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Geosains Kutai Basin
Published by Universitas Mulawarman
ISSN : -     EISSN : 26155176     DOI : https://doi.org/10.30872/geofisunmul.v5i2
Core Subject : Science,
Earth & Planetary Sciences
Coastal and Ocean Dynamics Environmental of Geophysics Geodesy and Geography Geographic Information System Geology Geophysics Exploration Geotechnical/ geo-engineering Hazard Mitigation Hydrology Meteorology and Climatology Mining Engineering Seismology and Volcanology Oceanography
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Geofisika
Articles 5 Documents
 1 
Search results for , issue "Vol. 7 No. 2 (2024)" : 5 Documents clear
Analisis Kestabilan Lereng Lowwall Pit X Di PT. Berkat Anugerah Sejahtera (BAS): Kestabilan Lereng Lowwall -, lisa haryani; Djayus, Djayus; Supriyanto, Supriyanto
GEOSAINS KUTAI BASIN Vol. 7 No. 2 (2024)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v7i2.1411

Abstract

This research aims to determine the optimal value of the mine Lowwall wall safety factor and analyze the slope stability of the mine Lowwall wall. The data used in this research are slope geometry data, physical properties, rock mechanics, and geotechnical drilling data. Safety factor analysis used GLE/Morgenstern-Price method and it was found that the lowwall slope safety factor result was 1,191, higher than the minimum limit set, namely 1.1. The research results show that the slope is in a safe and stable condition so it is safe for mining, in accordance with applicable safety standards.
Analisis Potensi Batuan Reservoir pada Cekungan Biliton Berdasarkan Data Well Logging untuk Eksplorasi Hidrokarbon Utami, Prapti Abdi Fina; Fazera, Asha Asfaninda Firda; Silaban, Emilya; Purniawan, Eka Maulividia Prilianti; Christhy, Michelle Ananta; Badaruddin, Dzul Fadli
GEOSAINS KUTAI BASIN Vol. 7 No. 2 (2024)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v7i2.1334

Abstract

The Biliton Basin in the western Java Sea, part of the southeastern margin of the Sunda Craton, shows potential for hydrocarbons based on well logging analyses from the Sari-1, Nila-1, and Parang wells. Formed during the Eocene-Oligocene extension, this basin's stratigraphy includes the Jatibarang and Banuwati formations. Well logging data identified the Air Benakat and Talang Akar formations as primary reservoir rocks with high porosity. However, only the Parang well displayed indications of oil at certain depths. While the Sari-1 and Nila-1 wells also have reservoir potential, they did not show the presence of hydrocarbons. This study underscores the existence of potential reservoir and seal rocks in the Biliton Basin, but significant hydrocarbon reserves have yet to be discovered. Further exploration is necessary to evaluate the hydrocarbon potential in this region.Keywords: Biliton Basin, hydrocarbons, well logging, Sunda Craton.
Identifikasi Potensi Batuan Induk pada Sumur Parang G-1 Berdasarkan Analisis Geokimia dan Analisis Stratigrafi di Cekungan Biliton azisyarlina, Dwi; wati, lia nurfitriana; Mushwil, Adam Muhady; Allo La'bi, Zet Linda; Rifdahana, Fadhilah; Badaruddin, Dzul Fadil
GEOSAINS KUTAI BASIN Vol. 7 No. 2 (2024)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v7i2.1329

Abstract

Hydrocarbons, especially oil and natural gas, are important energy sources for modern civilization. Rising global demand is driving intensive and innovative hydrocarbon exploration. This research was conducted in the Belitung Basin, South Sumatra, to determine the potential of the parent rock of the Palang G-1 well and determine the thickness of the formation based on stratigraphic analysis of the Belitung Basin. The geochemically described data is secondary data that has been processed and adopted by the Geological Survey Center of the Ministry of Energy and Mineral Resources. The research results indicate that the source rock with the highest potential for hydrocarbon production is found in the Talang Akar Formation, based on several parameters such as kerogen type, TOC content, and maturity level. However, the hydrocarbons in this well are not yet fully mature and require further investigation. Stratigraphic analysis revealed that the Non-Marine Clays Formation has a thickness of 2200 ft. The Talang Akar transition layer is defined as the transition contact with the Air Benakat formation. Based on drilling data, the Talang Akar Formation has a thickness of 1300 ft. The massive sand Talang Akar Formation has a thickness of 1000 ft. The Non-Marine Clay Layer has a thickness of 1800 ft.
Pengaruh Tutupan Lahan Terhadap Sambaran Petir Cg (Cloud To Ground) di Wilayah Balikpapan, Kutai Kartanegara dan Penajam Paser Utara Pada Tahun 2015 – 2019 Ramadhani, Fika Desy; Djayus, Djayus; Supriyanto, Supriyanto
GEOSAINS KUTAI BASIN Vol. 7 No. 2 (2024)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v7i2.907

Abstract

The increasing number of residents in the Balikpapan, Kutai Kartanegara and North Penajam Paser areas demands the use of land for settlements, resulting in a decrease in green open land and the potential to increase lightning strikes. The purpose of this study was to determine the density of CG (Cloud to Ground) lightning strikes and the effect of land cover on CG (Cloud to Ground) lightning in the Balikpapan, Kutai Kartanegara and North Penajam Paser areas in 2015-2019. This study uses data from 2015-2019 lightning strikes obtained from BMKG Balikpapan. Furthermore, the 2015-2017 data was processed using the LD2000 software and the 2018-2019 data had begun to be processed using the NexStorm V.8.4 software, so that the lightning strike density was obtained. Land cover data for 2015-2019 was obtained from BPKH Samarinda, then analyzed to produce a land cover classification. Furthermore, it is correlated so as to produce the effect of land cover on lightning strikes. The results show that the highest lightning density in the Balikpapan area is located in South Balikpapan District in 2019 with a value of 171.04 with land cover dominated by residential areas and airports, the high lightning strikes in this area are due to tall buildings being a medium for lightning to reach the earth. . The North Penajam Paser area has the highest lightning density located in Waru sub-district in 2019 with a value of 41.31 with land cover dominated by secondary dry land forest and plantation forest areas. The Kutai Kartanegara region has the highest lightning density in the Samboja sub-district in 2019 with a value of 67.23 with land cover dominated by dry land mixed with shrubs. The high number of lightning strikes in these two areas is caused by humidity, resulting in accumulation of positive charge.
Kajian Nilai B-Value untuk Menganalisis Aktivitas Seismik di Wilayah Pulau Jawa, Bali dan Nusa Tenggara Barat Munir, Rahmiati; Nurahmah, Laila; Friesky, Vindhiyah; Imran, Muh; Haryono, Arif
GEOSAINS KUTAI BASIN Vol. 7 No. 2 (2024)
Publisher : Geophysics Study Program, Faculty of Mathematics and Natural Sciences, Mulawarman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/geofisunmul.v7i2.1436

Abstract

This study aims to analyze seismic activity in East Java, Bali, and West Nusa Tenggara (NTB) using the b-value parameter. Earthquake data from the USGS catalog (2000–2023) were analyzed using Zmap software. To facilitate the analysis of the spatial distribution of b-values and seismic activity patterns in the study area, the region was divided into three areas: Region 1 covers most of West Java and Central Java, Region 2 includes the southern part of Central Java and part of East Java, while Region 3 covers East Java, Bali, and West Nusa Tenggara (NTB). The analysis steps include separating the main earthquake data, determining the b-value, and spatial mapping. The results show that b-values range from 0.4 to 1.9, where lower values (0.4–1.13) reflect high stress accumulation that may lead to large earthquakes, such as in Lombok, NTB. Conversely, higher values (1.13–1.9) indicate low stress, as seen in Sumbawa and the Indian Ocean. This study concludes that the study area exhibits different seismic activity patterns, with NTB as a high-risk area compared to East Java and Bali, in line with the distribution of b-values.

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