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Stratigraphy Seismic and sedimentation Development of Middle Baong Sand, Aru Field, North Sumatera Basin Natasia, Nanda; Syafri, Ildrem; Alfadli, Muhammad Kurniawan; Arfiansyah, Kurnia
Journal of Geoscience, Engineering, Environment, and Technology Vol 1 No 1 (2016): JGEET Vol 01 No 01 : December (2016)
Publisher : UIR PRESS

This paper defines the stratigraphic sequence focused on Middle Baong Sand. The analyses aim to understand the sedimentation pattern regarding to sequence stratigraphy model including its lateral and vertical succession based on seismic and well data. The study can be used in ranking the prospect for new oil field. Based on the analyses in 39 seismic sections and 2 wireline log, the area are consist of three depositional sequences, namely sequence I (consist of HST I) Sequence II (consist of TST II and LST II), and Sequence III (consist of TST III).  Baong Formation are deposited when the sea level are rising regionally at Middle Miocene (N7-N15) makes the sediment deposited in deep water environment. while Middle Baong Sand are deposited in the minor falling stage placed at N13 (Middle of Middle Miocene). In this episode, there is a change in depositional setting from bathyal to middle neritic. Clastic origin of this deposits were interpreted came from South-South West direction or from Bukit Barisan where at that time is started to uplift.

Characterization of Basement Fracture Reservoir In Field âXâ, South Sumatera Basin, Based On The Analysis of Core And FMI Log Riskha, Hartawi; Syafri, Ildrem; Ismawan, Ismawan; Natasia, Nanda
Journal of Geoscience, Engineering, Environment, and Technology Vol 2 No 2 (2017): JGEET Vol 02 No 02 : June (2017)
Publisher : UIR PRESS

Basement reservoir is a reservoir that is located in the basement rock, comprised of either igneous rock or metamorphic rock that has secondary porosity, resulting in its capability to store oil and gas. The research was conducted at field X that is located at South Sumatra basin and it is a part of Jambi Sub-Basin. The study was focused on discussing hydrocarbon potential in Fields X, particularly at the basement metamorphic rock. The study was conducted at two wells in the field. The secondary porosity system of the basement is fracture porosity. Fracture analysis as secondary porosity system was performed on two wells, HA-1 and HA-2, by using FMI log interpretation. Based on the analysis of fracture on HA-1 well, the trend of fracture system is Northeast - Southwest (NE-SW) with a fracture porosity of 1.49%. On a different note, the trend of fracture system on HA-2 wells is East Northeast - West Southwest (ENE-WSW) with a fracture porosity of 0.888%. The effect of rock properties itself has little influence on the number of fractures as opposed to the effect of surrounding tectonic forces. The fractures are controlled by geological structures following Jambi pattern that has an orientation of Northeast - Southwest (NE-SW). Although the fracture porosity is relatively small, it is enough to storing hydrocarbons in economical quantity.

Geoelectricity Data Analysis For Identification The Aquifer Configuration In Bandorasawetan, Cilimus, Kuningan, West Java Province Alfadli, Muhammad Kurniawan; Natasia, Nanda
Journal of Geoscience, Engineering, Environment, and Technology Vol 2 No 4 (2017): JGEET Vol 02 No 04 : December (2017)
Publisher : UIR PRESS

Indonesian water consumption is influenced by the people growth. One of Water consumption fulfilment by groundwater aquifer. Bandorasawetan is one of the areas which predicted have proper potential due to located in East of Mt. Ceremai that predicted recharge area. Based on regional geological data, Bandorasawetan is an undifferentiated young volcanic product which consists of lava, breccia, lapilli, and tuffaceous sand. Geophysics method for groundwater prediction is 2-D geoelectrical with Wenner – Schlumberger configuration. The result of acquisition is obtained resistivity value from 0 - >1000 Ohm. m. Interpretation from data distribution is consist of two resistivity range that describes lithology on the research area, such as: 0 – 150 Ohm.m contributed as aquiqlud with tuffaceous sand lithology and > 150 Ohm.m interpreted as volcanic breccia lithology. Volcanic breccia has a role as aquifer in study area, the conclusion is distribution of resistivity value with range > 150 Ohm.m be the reference to developing groundwater resource in study area. Depth of aquifer is varying, deeper to the east. In Line – 1, depth of the aquifer is 48 meters and in Line – 2, depth of aquifer be 60 meters.

Stratigraphy Seismic and sedimentation Development of Middle Baong Sand, Aru Field, North Sumatera Basin Nanda Natasia; Ildrem Syafri; Muhammad Kurniawan Alfadli; Kurnia Arfiansyah
Journal of Geoscience, Engineering, Environment, and Technology Vol. 1 No. 1 (2016): JGEET Vol 01 No 01 : December (2016)
Publisher : UIR PRESS

This paper defines the stratigraphic sequence focused on Middle Baong Sand. The analyses aim to understand the sedimentation pattern regarding to sequence stratigraphy model including its lateral and vertical succession based on seismic and well data. The study can be used in ranking the prospect for new oil field. Based on the analyses in 39 seismic sections and 2 wireline log, the area are consist of three depositional sequences, namely sequence I (consist of HST I) Sequence II (consist of TST II and LST II), and Sequence III (consist of TST III). Baong Formation are deposited when the sea level are rising regionally at Middle Miocene (N7-N15) makes the sediment deposited in deep water environment. while Middle Baong Sand are deposited in the minor falling stage placed at N13 (Middle of Middle Miocene). In this episode, there is a change in depositional setting from bathyal to middle neritic. Clastic origin of this deposits were interpreted came from South-South West direction or from Bukit Barisan where at that time is started to uplift.

Characterization of Basement Fracture Reservoir In Field ‘X’, South Sumatera Basin, Based On The Analysis of Core And FMI Log Hartawi Riskha; Ildrem Syafri; Ismawan Ismawan; Nanda Natasia
Journal of Geoscience, Engineering, Environment, and Technology Vol. 2 No. 2 (2017): JGEET Vol 02 No 02 : June (2017)
Publisher : UIR PRESS

Basement reservoir is a reservoir that is located in the basement rock, comprised of either igneous rock or metamorphic rock that has secondary porosity, resulting in its capability to store oil and gas. The research was conducted at field 'X' that is located at South Sumatra basin and it is a part of Jambi Sub-Basin. The study was focused on discussing hydrocarbon potential in Fields 'X', particularly at the basement metamorphic rock. The study was conducted at two wells in the field. The secondary porosity system of the basement is fracture porosity. Fracture analysis as secondary porosity system was performed on two wells, HA-1 and HA-2, by using FMI log interpretation. Based on the analysis of fracture on HA-1 well, the trend of fracture system is Northeast - Southwest (NE-SW) with a fracture porosity of 1.49%. On a different note, the trend of fracture system on HA-2 wells is East Northeast - West Southwest (ENE-WSW) with a fracture porosity of 0.888%. The effect of rock properties itself has little influence on the number of fractures as opposed to the effect of surrounding tectonic forces. The fractures are controlled by geological structures following Jambi pattern that has an orientation of Northeast - Southwest (NE-SW). Although the fracture porosity is relatively small, it is enough to storing hydrocarbons in economical quantity.

Geoelectricity Data Analysis For Identification The Aquifer Configuration In Bandorasawetan, Cilimus, Kuningan, West Java Province Muhammad Kurniawan Alfadli; Nanda Natasia
Journal of Geoscience, Engineering, Environment, and Technology Vol. 2 No. 4 (2017): JGEET Vol 02 No 04 : December (2017)
Publisher : UIR PRESS

Indonesian water consumption is influenced by the people growth. One of Water consumption fulfilment by groundwater aquifer. Bandorasawetan is one of the areas which predicted have proper potential due to located in East of Mt. Ceremai that predicted recharge area. Based on regional geological data, Bandorasawetan is an undifferentiated young volcanic product which consists of lava, breccia, lapilli, and tuffaceous sand. Geophysics method for groundwater prediction is 2-D geoelectrical with Wenner – Schlumberger configuration. The result of acquisition is obtained resistivity value from 0 - >1000 Ohm. m. Interpretation from data distribution is consist of two resistivity range that describes lithology on the research area, such as: 0 – 150 Ohm.m contributed as aquiqlud with tuffaceous sand lithology and > 150 Ohm.m interpreted as volcanic breccia lithology. Volcanic breccia has a role as aquifer in study area, the conclusion is distribution of resistivity value with range > 150 Ohm.m be the reference to developing groundwater resource in study area. Depth of aquifer is varying, deeper to the east. In Line – 1, depth of the aquifer is 48 meters and in Line – 2, depth of aquifer be 60 meters.

Resistivity Data Modeling for Subsurface Volcanostratigraphy Construction of Cibadak Sub-Watershed, Bogor, West Java, Indonesia. Muhammad Kurniawan Alfadli; Undang Mardiana; Nanda Natasia; Febriwan Mohammad; Deden Zaenudin Mutaqin
Journal of Geoscience, Engineering, Environment, and Technology Vol. 6 No. 2 (2021): JGEET Vol 06 No 02 : June (2021)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2021.6.2.2274

In Mt. Salak, there are six volcanic facies divided by eruption time seen from geomorphology data analysis and to identified the subsurface layer DC Resistivity method is applied. Beside resistivity, geostatistical parameters also influence the result model interpretation, so for obtain best model correlation parameters such as tilting, surfacing, variogram, grid method, and logarithmic distribution is applied. Using 18 points of acquisition data subsurface model is produce and then section model made to describe vertical resistivity distribution then correlated with facies lithology model. Based on that, produce three facies resistivity type namely: 0 – 100 Ohm.m (Low Resistivity Value) Interpreted as pyroclastic material composed as tuff and breccia that lies under lava. 100 – 300 Ohm.m (Medium Resistivity Value) Interpreted as breccia lithology type. Harder that pyroclastic material due to by this product is avalanches of lava. And >300 Ohm.m (High Resistivity Value) Interpreted as lava lithology that lies at high elevation and the hardest lithology in this area. From the model, pyroclastic layer that is modeled found at low elevation and based on the direction it described as oldest facies layer, but at the bottom of this layer lies high resistivity value that unknown product. It can be Mt. Pangrango product due to at low elevation predicted as combine area product from product of Mt. Salak and Pangrango. High resistivity value show lava lithology and lava facies located in high elevation and medium resistivity describe breccia lithology as avalanche product of lava (youngest pyroclastic facies) and found at 500 – 100 meters msl.

Geotourism on XIII Koto Kampar: an Approach for Sustainable Eco-Geo System Adi Suryadi; Tiggi Choanji; Yuniarti Yuskar; Nanda Natasia; Tristan Aulia Akhsan; M Revanda Syahputra
Journal of Geoscience, Engineering, Environment, and Technology Vol. 4 No. 4 (2019): JGEET Vol 04 No 04: December 2019
Publisher : UIR PRESS

XIII Koto Kampar has become one of the potential geotourism destinations in Riau Province. The beauty of geomorphological view of XIII Koto Kampar is the main attraction for tourism. This study aims to expose the uniqueness of geological conditions that form the geomorphological of study for educational, social and economic purposes. The method used for this study is a combination of geological and geomorphological mapping and assess the inventory of geosites. Geomorphological of study area is consist of wide lake with some islands on it. Based on the elevation, geomorphology of study area devided into four which are flatland, gentle hill, steep hill and very steep hill. The result of geological mapping shown there are two dominated rock claystone and sandstone. Geotourism potential of study area classified into three main zone namely geomorphological landscape zone, water play zone and waterfall zone. Sustainable system of geotourism of XIII Koto Kampar is potential livelihood to increase the economical of local society.

Studi Awal Potensi Bahan Galian Pada Daerah Kabupaten Belitung Timur, Indonesia Nanda Natasia; Muhammad Nursiyam Barkah; Dian Hari Saputra; Muhammad Kurniawan Alfadli
Bulletin of Scientific Contribution: GEOLOGY Vol 14, No 2 (2016): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

The mining development is influences the economy growth and support to increases the society prosperity. East Belitung be able to execute the mining development which have some potential mining resources such tin, galena, iron ore, bauxite, granite, quartz sand, and kaolin. The research method is field observation to find out the geological condition and the mining material resources along with GIS analysis for representation the geomorphology and geology in East Belitung. East Belitung geomorphology consist of plains and hills with elevation more than 600 msl. The plain area is used for tin exploration and oil palm plantation, while the hill area for protected forest. East Belitung geology consist of alluvium, carbon sand, Tajam Formation, Kelapakampit Formation, Siantu Formation, Tanjungpandan Granite, Baginda Adalemite, Burungmandi Granodiorite, Batubesi Quartz Diorite. The geology structure in East Belitung are fold, fault and crack. Generally, the fold direction is NW-SE, the fault direction is NE-SE. Based on geochemical analysis and the distribution of mining material resources can be concluded that East Belitung area have large potential of mining material resources, it seen from galena, iron ore and bauxite materials that have intermediate until good quality. Besides that, from the delineation of potential distribution map shown the mining material have extensive distributions and can be optimization for regional development and society prosperity. Keywords : Mining Material, East Belitung, Delineation of Potential Distribution, Mining ABSTRAKPerkembangan area pertambangan sangat berpengaruh kepada pertumbuhan ekonomi suatu daerah dan membantu dalam peningkatkan kesejahteraan masyarakat. Salah satu daerah yang dapat melakukan pengembangan area pertambangan adalah Belitung Timur yang memiliki beberapa potensi bahan galian antara lain timah, galena, biji besi, bauksit, granit, pasir kuarsa, dan kaolin. Metode penelitian berupa pengamatan lapangan untuk mengetahui kondisi geologi dan sumberdaya bahan galian serta analisis GIS untuk mendapatkan gambaran geomorfologi dan geologi Kepulauan Belitung. Geomorfologi pada daerah Belitung Timur berupa pedataran dan perbukitan yang ketinggiannya berada diatas 600 mdpl. Pedataran lebih banyak dipergunakan untuk penambangan timah dan perkebunan sawit, sedangkan perbukitan dimanfaatkan untuk hutan lindung. Geologi pada daerah Belitung Timur terdiri dari Aluvium, Pasir berkarbon, Formasi Tajam, Formasi Kelapakampit, Formasi Siantu, Granit Tanjungpandan, Adalemit Baginda, Granodiorit Burungmandi, Diorit Kuarsa Batubesi. Struktur geologi yang berkembang pada kawasan ini adalah lipatan, sesar dan kekar .Arah sumbu lipatan umumnya Baratlaut-Tenggara, sedangkan sesar berarah Timurlaut-Baratdaya. Berdasarkan analisis geokimia dari sampel lapangan dan sebaran dari bahan galian yang ada dapat disimpulkan bahwa daerah kawasan Belitung Timur memiliki potensi bahan galian yang besar, terlihat dari kandungan bahan galian galena, biji besi, dan bauksit yang memiliki kadar menengah hingga tinggi. Selain itu, dari hasil deliniasi sebaran potensi memperlihatkan sebaran bahan galian berpotensi yang berada pada kawasan Belitung Timur sangat besar dan dapat dioptimalisasi agar berguna untuk pembangunan dan peningkatan kesejahteraan masyarakat. Kata kunci : Bahan Galian, Belitung Timur, Deliniasi Sebaran Potensi, Pertambangan.

POLA PERSEBARAN DAN ESTIMASI CADANGAN ANDESIT PADA DESA CILULUK, KECAMATAN CICALENGKA, KABUPATEN BANDUNG Arif Swastika; . Syafriyono; Caesario Dipo; Ahmad Yuda Pratama; Sony Malik Kartanegara; Wahyu Budhi Khorniawan; Muhammad Sayyidi; Nanda Natasia
Bulletin of Scientific Contribution: GEOLOGY Vol 16, No 2 (2018): Bulletin of Scientific Contribution GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Abstrak - Andesit merupakan komoditas mineral non-logam yang berpotensi sebagai sumber bahan galian C. Desa Ciluluk, Kecamatan Cicalengka, Kabupaten Bandung secara tatanan geologi termasuk ke dalam Satuan Batuan Gunungapi Mandalawangi-Mandalagiri yang terdiri dari tuf dan lava berkomposisi andesit. Oleh karena itu, daerah ini dipilih sebagai lokasi studi untuk mengetahui pola persebaran andesit dan estimasi cadangannya. Pola persebaran andesit di daerah penelitian diprediksi berdasarkan data hasil survey geolistrik 1D dan 2D. Kemudian, estimasi cadangan dihitung menggunakan model sebaran 3D yang terbagi menjadi 2 skenario penambangan dengan mempertimbangkan kondisi topografi dan sebaran andesit. Berdasarkan pengamatan lapangan, andesit di daerah penelitian tersebar tidak merata dan dapat dibedakan menjadi 2 jenis yaitu soft dan hard andesite. Kedua tubuh andesit ini memiliki pola sebaran barat-timur dengan kenampakan fisik serta nilai resistivitas yang berbeda dimana hard andesite memiliki nilai resistivitas yang lebih tinggi (>350 Ωm). Hasil perhitungan cadangan menunjukkan bahwa cadangan andesit berkisar antara 3.861.267 ton untuk skenario 1 hingga 9.617.227 ton untuk skenario 2. Lebih lanjut, nilai cadangan ini bisa dibandingkan dengan melakukan perhitungan cadangan terukur berdasarkan data pengeboran disertai pengukuran topografi secara lebih rinci. Kata kunci – Andesit, Geolistrik, Cicalengka

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