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INDONESIA
Journal of Geosciences and Applied Geology
Published by Universitas Padjadjaran
ISSN : 25793136     EISSN : 25793136     DOI : https://doi.org/10.24198/gsag.v7i3
Core Subject : Science, Engineering,
Earth & Planetary Sciences Engineering
Journal of Geological Sciences and Applied Geology (GSAG) is a National multidisiplinary Journal focus on Geological Sciences, Applied Geology, and Geological Engineering and Earth Science. Our Mission is to publish research related to (but not limited) Geology Petrology Paleontology Stratigraphy Sedimentology Remote Sensing Geomorphology GIS Engineering Geology Geotechnics Geochemistry Geophysics Geological Hazard and Disaster Geopark Hazard Mitigation Geography Earth Sciences
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Geologi
Articles 6 Documents
 1 
Search results for , issue "Vol 7, No 1 (2023): Journal of Geological Science and Applied Geology" : 6 Documents clear
SOURCE ROCK CHARACTERISTICS BASED ON GEOCHEMICAL ANALYSIS AND 1D BURIAL HISTORY MODELING IN THE “NAY” FIELD SOUTH SUMATRA BASIN Nizalia Azzahra Yoza; Elrey Fernando Butarbutar; Yoga Andriana Sendjadja; Nisa Nurul Ilmi
Journal of Geological Sciences and Applied Geology Vol 7, No 1 (2023): Journal of Geological Science and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v7i1.49033

Abstract

The research is located in the "NAY" Field, South Sumatra Basin at NAY 1-4 Wells. This research was carried out with the aim of knowing the characteristics of source rock such as quantity, quality, maturity, and depositional environment using geochemical analysis, then analyzing the burial history in the study area which was visualized in 1D modeling using Petromod. The results showed that the dominant Well has effective source rock in the Talang Akar Formation. The results of the 1-D Burial History modeling show that the NAY-1 Well is entering phase early mature at a depth of 2394 m at the Talang Akar formation in Early Pliocene (4.22 Ma) and starting to enter the mature phase at a depth of 2521 m in Middle Pliocene (3.27 Ma). The NAY-2 well is entering phase of early mature at a depth of 2521 m at the Talang Akar formation in Early Pliocene (2.64 Ma) and this formation is entering the mature phase at a depth of 2600 m which is Late Pliocene (1.32 Ma). The NAY-3 Well is still immature. Then the NAY-4 well entering phase of early mature at a depth of 2255 m at the Talang Akar Formation in Early Pliocene (2.27 Ma) and the Baturaja Formation at a depth of 2166 m in Late Pliocene (1.63 Ma). The results also show that the majority of the hydrocarbons found in this basin have a marine-terrestrial depositional environment.
Estimation of Shale Content Calculation using log data in Kutai Basin Yusi Firmansyah; Muhammad Rafie; Reza Mohammad Ganjar Gaji
Journal of Geological Sciences and Applied Geology Vol 7, No 1 (2023): Journal of Geological Science and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v7i1.49332

Abstract

Log data from the study area is located in the Kutai Basin, precisely in the Pulubalang Formation which is used to calculate the estimated shale content. Shale content estimation is one of the petrophysical parameters. In this study, the calculation of shale content estimation uses 3 methods, namely linear, Clavier and Stieber methods. The results of the calculation will provide the volume value of shale in the research area. In the process of calculating the shale content is calculated by separating the range of zones that will be calculated after determining the shale baseline by positioning the zone line on the highest gamma ray log and sand baseline on the lowest gamma ray which then shows the shale content contained in the zone to be analyzed. The results of the calculation of shale content in well A at a depth of 2750 - 3224 m ranged from 36.57% to 71.99%. The results of the analysis of clay content in the study area have an average clay content of 49.22%, meaning that the more clay content, the smaller the permeability and resistivity values will be and will increase the water saturation value.
LOWWALL SLOPE STABILITY OF PANEL 32 AND PANEL 36 PT. XYZ, SOUTH KALIMANTAN Aliyuddin Jamil; Raden Irvan Sophian; Pradnya Paramarta Raditya Rendra
Journal of Geological Sciences and Applied Geology Vol 7, No 1 (2023): Journal of Geological Science and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v7i1.48196

Abstract

The research was conducted in the coal mining area of PT. XYZ, South Kalimantan. The research aims to create a geological model for each cross-section according to the characteristics of materials and to calculate the slope stability of the lowwall slope. The researcher calculated the slope stability using Morgenstern-Price method with Rocscience Slide2 software. The geological conditions of the study area are composed of alternating sandstones with coal-inserted claystone and coal-inserted claystone from the Warukin Formation. Material properties at the study area are composed of sandstone, claystone, and coal. The results of the slope stability simulation show that the lowwall panel 32 slope has a safety factor value of 1.081 while the lowwall panel 36 slope has a safety factor value of 1.107.
ANALYSIS OF GEOMORPHOLOGICAL ASPECTS OF SURADE SUB-DISTRICT, SUKABUMI DISTRICT, WEST JAVA Yusi Firmansyah; Nur Khoirullah; Moh Fahrul Yahya
Journal of Geological Sciences and Applied Geology Vol 7, No 1 (2023): Journal of Geological Science and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v7i1.49334

Abstract

The current form of the earth's surface romance is the result of geological processes that have taken place during the geological period which can show how the characteristics and distribution of the constituent rocks. This research was conducted to find out how the geomorphological conditions by analyzing the aspects of morphography, morphometry, and morphogenetics as a form of geomorphology in an area. The research location is in Mekarjaya Village, Ciemas Sub-district, Sukabumi Regency, West Java, which has geomorphological conditions influenced by the activity of an old submarine volcano which was then uplifted and experienced an intensive tectonic process. The method used in this study combines qualitative and quantitative aspects supported by satellite imagery, data processing applications, and references from previous research results. The results of this study show that there are 2 geomorphological units, namely the Slightly Steep Volcanic Hills Unit and the Steep Volcanic Hills Unit with the distribution of andesitic lava and volcanic breccia rocks. The drainage pattern that develops is rectangular.
SIMULATION OF OPD WASTE DUMP SLOPE USING THE MORGENSTERN-PRICE METHOD IN WORK AREA OF PT. XYZ TBK. PASER DISTRICT, EAST KALIMANTAN PROVINCE Lizzy Evsa Audrey; Raden Irvan Sophian; Sapari Dwi Hadian
Journal of Geological Sciences and Applied Geology Vol 7, No 1 (2023): Journal of Geological Science and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v7i1.48280

Abstract

The research was conducted at a company working in the coal mining contract sector, namely PT. XYZ Tbk. OPD is located in Paser Regency, East Kalimantan. The research aims to create a slope simulation for analysis. This analysis is used to determine the safety value factor with the influence of the parameters used, with reference to the safety value factor based on safe slope criteria according to KEPMEN ESDM Number 1827 K /30/MEM/2018. Parameters in the simulation are material properties in the form of unit weight, cohesion and internal friction angle. The material used is bedrock material in the form of sandstone, and overburden material in the form of a mixture of sandstone and claystone. Engineering is carried out by considering the condition of the groundwater table, namely full saturation and the earthquake vibration coefficient, to be analyzed using the Morgenstern-Price method. The safety factor value that has been obtained in the slope simulation is 1,216, the safety factor value includes unsafe slopes which are affected by groundwater conditions and earthquake vibrations.
SOURCE ROCK EVALUATION BASED ON GEOCHEMICAL DATA AND 1D BURIAL HISTORY MODELLING IN X BLOCK, SOUTH SUMATERA BASIN Tiara Intan Dwi Putri; Dimas Pramudito; Yoga Andriana Sendjaja; Nisa Nurul Ilmi
Journal of Geological Sciences and Applied Geology Vol 7, No 1 (2023): Journal of Geological Science and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v7i1.49020

Abstract

The study was conducted in the South Sumatra Basin using geochemical data consisting of three exploration wells to determine geochemical characteristics such as richness, quality, maturity, and the depositional environment of the source rock. Additionally, the study delved into the one-dimensional burial history of the study area. Subsequent phases of the research involved the analysis of three crude oil samples and three rock extract samples. This analytical process encompassed the utilization of gas chromatography (GC) and gas chromatography - mass spectrometry (GC-MS) data. By scrutinizing the biomarker parameters extracted through GC and GC-MS, the research sought to discern the specific characteristics of the depositional environment for each sample and establish a correlation between the source rock and the crude oil. Based on source rock evaluation, the three source rock wells are potential source rock. Based on biomarker analysis, TAN-1 and TAN-2 have an oxic terrestrial/fluvio-deltaic characteristics with a dominantly higher plant contributions. Samples RA-12, RA-17, and RA-61 have a suboxic – anoxic fluvio-deltaic characteristics with contributions of dominantly marine algae. The oil samples taken from these wells have a negative correlation with the source rock samples. Maturity analysis of the TAN-1, TAN-2, and TAN-3 wells is still in its immature phase based on one-dimensional burial history modeling.

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