cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Rahmiati
Contact Email
rahmiati@fmipa.unmul.ac.id
Phone
+6281355258687
Journal Mail Official
kutaibasin@fmipa.unmul.ac.id
Editorial Address
Jalan Barong Tongkok No.4 Gunung Kelua Samarinda, East Kalimantan Province Indonesia - 75123
Location
Kota samarinda,
Kalimantan timur
INDONESIA
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 108 Documents
 7   8   9   10   11 
Studi Prospek Reservoar Hidrokarbon Berdasarkan Karakteristik Petrofisika di Lapangan ‘X’ Cekungan Sebuku Jayadi, Harsano; Imran, Syahdan Ali; Atmoko, Widi; Uno, Irianto; Meidji, Icha Untari
GEOSAINS KUTAI BASIN Vol. 7 No. 1 (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.v7i1.1275

Abstract

The research was conducted to determine the hydrocarbon reservoir zone in the LIM-1 well, which was analyzed using quantitative and qualitative methods to assess the reservoir type involving several log data, including gamma ray (GR), neutron (NPHI), and density (RHOB). The quantitative analysis stage is the determination of hydrocarbon content by the crossover of NPHI log data, and RHOB log data with six target zones. The quantitative analysis stage in this study uses Interactive Petrophysics (IP) software version 3.5 on well LIM-1, also with target zone 1 only. The results obtained from qualitative and quantitative analysis at well LIM-1 show that there are three types of reservoirs in the study area from several target zones according to depth, which are dominated by oil, water, and gas.
Identifikasi Keberadaan Hidrokarbon Menggunakan Inversi Impedansi Akustik dengan Algoritma Artificial Neural Network (ANN) Maulana, Ansar; Lepong, Piter; Sutaji Putri, Devina Rayzy Perwitasari; Munir, Rahmiati
GEOSAINS KUTAI BASIN Vol. 7 No. 1 (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.v7i1.1127

Abstract

Hydrocarbons are the main energy source in the world, especially in Indonesia, this is what makes hydrocarbons a natural resource that has been extensively explored to determine the presence of hydrocarbons. The exploration used is the Geophysics method, namely the seismic method and the well logging method, both methods are processed to provide an overview of the subsurface. The data processing technique used is acoustic impedance inversion modeling which aims to determine the characteristics of the reservoir based on changes in the acoustic impedance value in each layer. In this study using model-based acoustic impedance inversion using an artificial neural network (ANN) algorithm and the results obtained in the inversion analysis obtained an error of 0.002, so that the model can be used on seismic trace data to produce an acoustic impedance model. modeling section with a value of less than 5000 which may mean that there are hydrocarbons in the research location. Keywords: Artificial Neural Network, Hydrocarbons, Acoustic Impedance, Inversion.
Laju Infiltrasi Air di Lubang Biopori pada Berbagai Jenis Tanah di Kelurahan Loa Bakung Arrosyidah, Mosy R; Djayus, Djayus; Mislan, Mislan; Munir, Rahmiati
GEOSAINS KUTAI BASIN Vol. 7 No. 1 (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.v7i1.1237

Abstract

The reduction of green open space results in a lack of infiltration of rainwater into the soil and an increase in the amount of surface flow, one solution to overcome these problems is to implement a biopore infiltration hole system. This study aims to determine the rate and capacity of water infiltration in biopore holes based on various soil types in Loa Bakung Village. The infiltration rate was determined through direct measurement at 9 points in 3 locations with gleisol, podzolic, and podzolic haplik soil types, then measured by putting water into a hole with a diameter of 10 cm with a depth of 80 cm - 100 cm. The parameters measured are the difference in distance or height and time. The results of parameter measurements were made into a graph to obtain the highest infiltration rate at the research location, and determine the infiltration capacity using the Horton equation. Then, soil samples were analyzed by measuring soil physical properties that affect infiltration rates such as texture, porosity, permeability, and moisture content. The results showed that the infiltration rate and infiltration capacity varied in each location. Location 2 with podzolic soil type shows the highest infiltration rate and capacity value of 2820 cm/hour with an infiltration capacity of 2782.84 cm/hour. Followed by location 1 which is a gleisol soil type of 1224 cm/hour with an infiltration capacity of 1217.72 cm/hour, and the lowest value is shown in location 3 with a haplik podzolic soil type of 1050 cm/hour with an infiltration capacity of 1041.46 cm/hour.
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.
Morphology and Mineral Analysis of Coal in Senoni Village, Sebulu District, Kutai Kartanegara Regency Using SEM-EDS Jamilah, Nur
GEOSAINS KUTAI BASIN Vol. 8 No. 1 (2025)
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.v8i1.1435

Abstract

Coal is formed through the process of coalification, which occurs with increasing temperature, pressure and time. The coalification process produces coal of varying quality depending on the level of organic maturity. Coal quality parameters are influenced by the minerals contained in the coal. To identify minerals in coal, a scientific approach can be used, namely SEM-EDS (Scanning Electron Microscope-Energy Dispersive Spectroscopy). In Senoni Village, coal mining is still minimal. To find out whether the coal in the area has good quality and has prospects for mining, it is necessary to do a coal quality test, namely by looking at the minerals contained in the coal. The first research stage is to take coal samples in the research area. Then the sample is prepared, namely making the sample in the form of chunks into granules with a size of 40 mesh. Furthermore, the SEM-EDS characterization test was carried out to determine the morphology and elemental content found in coal. The results obtained show that the minerals contained in coal are quartz, marcasite and calcite minerals. As well as the percentage of elemental content (C) 83.3%, (O) 16.0%, Na 0.1%, Al 0.2%, Si 0.1%, S 0.2% and Ca 0.1%. Based on the carbon content, this coal is classified as batuminous (good quality).
Analisis Pola Seismisitas Berdasarkan Nilai B-Value di Wilayah Laut Flores Rosidi, Fachrul; Azisyarlina, Dwi; Wati, Lia Nurfitriana; Munir, Rahmiati; Haryono, Arif; Imran, Muh
GEOSAINS KUTAI BASIN Vol. 8 No. 1 (2025)
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.v8i1.1478

Abstract

The Flores Sea, located within Indonesia's territorial waters, is an area with high volcanic and seismic activity due to its position within the Pacific Ring of Fire. The complex movement of tectonic plates frequently triggers earthquakes in this region. This study was conducted to analyze earthquake potential in three segments of the Flores Sea area based on b-value and to examine earthquake events with magnitudes ≥ 7.4 within the period from 2000 to 2023 using Matlab and Zmap applications. From the analysis, it was found that Segment 1 has a higher potential for major earthquakes due to its low b-value. Meanwhile, Segment 2 shows a b-value below 1.19, indicating a significant potential for major earthquakes. In contrast, Segment 3 exhibits a b-value above 1.11, suggesting a lower likelihood of large-scale earthquakes. However, significant earthquakes can still occur, such as the one in Lospalos in December 2021 with a magnitude of 7.6. This demonstrates that, despite lower risk based on b-value, major earthquakes remain possible. Overall, from 2000 to 2023 in the Flores Sea region, only two events were recorded with magnitudes exceeding ≥ 7.4: one in Segment 2 with a magnitude of 7.5 in 2005, and another in Segment 3 with a magnitude of 7.6 in 2021.

Page 10 of 11 | Total Record : 108

 7   8   9   10   11 

Filter by Year

2018 2025


Reset
Filter By Issues
All Issue Vol. 8 No. 2 (2025) Vol. 8 No. 1 (2025) Vol. 7 No. 2 (2024) Vol. 7 No. 1 (2024) Vol. 6 No. 2 (2023) Vol 6 No 1 (2023) Vol 5 No 2 (2022) Vol 5 No 1 (2022) Vol 4 No 2 (2021) Vol 4 No 1 (2021) Vol 3 No 2 (2020) Vol 3 No 1 (2020) Vol 2 No 2 (2019) Vol 2 No 1 (2019) Vol 1 No 2 (2018) Vol. 1 No. 1 (2018) More Issue