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All Journal Bulletin of Scientific Contribution : Geology Dharmakarya : Jurnal Aplikasi Ipteks Untuk Masyarakat Journal of Geoscience, Engineering, Environment, and Technology Journal of Geosciences and Applied Geology

Nanda Natasia

Faculty Of Geological Engineering , Padjadjaran University, Jl. Raya Bandung – Sumedang Km 21, Jatinangor, Indonesia

Author-ID : 2695269

Agriculture, Biological Sciences & Forestry Arts Humanities Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Economics, Econometrics & Finance Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Physics Public Health

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Combining geological surface data and geostatistical model for Enhanced Subsurface geological model Alfadli, Muhammad Kurniawan; Natasia, Nanda; Haryanto, Iyan
Journal of Geological Sciences and Applied Geology Vol 2, No 2 (2017): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v2i2.13451

AbstractThis paper emphasis the use of geological information gathered from surface mapping and subsurface data, the method that used was mainly utilizing statistical information and deterministic model interpreted. Comparison model was built to calculate the deviation between realization, the calculation was furthered can be used as a uncertainty to make a better decision to choose the best realization. Geostatistics is a branch of statistics focusing on spatial or spatiotemporal datasets. In geology, geostatistical is used for numerical calculation of subsurface approach with several data such as geophysical or geological observation. Geostatistics modelling have several parameters setup to obtain best approach model. The parameters namely lithological boundary, geological structure and random seed number. Process for modelling used 23 drilling data with various lithological type. Two type geostatistical method is applied for the data that is Indicator Kriging (IK) and Sequential Indicator Simulation (SIS) with grid size 1000x1000 and 2000x1500. Distribution of lithology begin without parameters. Resulted shown that the model not appropriate with geological surface data and mismatch lithology position. To obtained better model, several geological information is included before geostatistical calculation. From regional geology surface data is obtained geological formation within lithological information. Then, geological structure describes the geology fault and formation boundary.Keywords: Geostatistics, subsurface, enhanced model, variance, random seed number

Linking Petrography And Petrophysical Analysis In Carbonate Reservoir Characterization: Case Study In Baturaja Formation Offshore Northwest Java Natasia, Nanda; Alfadli, Muhammad Kurniawan; Arfiansyah, Kurnia; Hardiyono, Adi; Barkah, Mohamad Nursiyam; Haryanto, Iyan
Journal of Geological Sciences and Applied Geology Vol 2, No 2 (2017): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v2i2.13448

AbstractLinking geological analysis with petrophysical characterization in complex carbonate reservoir is a chalangging task. Many previous researcher has proofed that depositional facies in carbonate reservoir has very little advantages in reservoir quality due to overprinted with diagenetic facies. The difficulties in characterized the carbonate may rise because one does not include some genetic, geometrical and petrophysical character of the pore space, both geometry and distribution. The aim of this study is to evaluate the reservoir rock typing in carbonate reservoir by comparing rock-fabric descriptions analyzed in thin section with laboratory measurements of porosity, permeability, capillarity, and Archie m values. Methodology employed for this study involved the examination of thin sections and the integration of routine analysis data following lucia’s pore classification scheme. The first step in characterized the petrophysical class is the determination of interparticle porosity by substracting the separate vug porosity from total porosity. The separate vug porosity is estimated in petrographic analysis in 325 thin section samples. Than estimating the value for un cored interval by determining the relationships between total porosity, separate vug porosity and sonic interval transit time. The petrographic analysis to estimating the separate vug porosity is a qualitative way, and so the value is not quantitative, but the trend is still implies the value so the relationships between porosity and sonic log can be quantified. Calibration of pore types to acoustic log response is accomplished by making a detailed log of porosity types described from thin sections and constructing Z-plots of total porosity and transit time from logs and separate-vug porosity from thin sections . The “m” value (lithology exponent or cementation factor) is different from the other terms in the Archie equation in that it is related to rock fabrics, specifically to vuggy porosity. Reservoir characterization by using this scheme has proofed that geological analysis made in detailed thin section can be a helpfull tool since the validation in tested and produced interval shows a verry good relationships. Keywords : Reservoir Characterization, Baturaja Fm., Carbonate, Petrophysics.

Lithofacies of the Halang Formation in the Cijurey River-Majalengka Abdurrokhim, .; Firmansyah, Yusi; Natasia, Nanda; Saputra, Mulyana
Journal of Geological Sciences and Applied Geology Vol 2, No 3 (2017): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v2i3.15614

This report discusses lithofacies composition of the upper part Halang Formation that is well exposed along the Cijurey River, Majalengka - West Java. A total of 450-m-thick continues section of the Halang Formation have been measured and described. The lithofacies composition of the Halang Formation in the Cijurey River consists of alternating thin- to very thin-bedded sandstones and mudstone, un-bedded mudstones, very thick pebbly mudstones, breccia and slump. Andesitic igneous rock intruded locally to this formation.

STRUCTURAL GEOLOGY AND MAGMATISM/VOLCANISM ACTIVITY TOWARD GEOMORPHOLOGY IN BANDUNG BARAT-CIRANJANG, WEST JAVA Haryanto, Iyan; Ilmi, Nisa Nurul; Hutabarat, Johanes; Natasia, Nanda; Sunardi, Edy
Journal of Geological Sciences and Applied Geology Vol 3, No 3 (2019): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v3i3.25947

Geomorphology along Ciranjang to Bandung Barat is dominated by structural hills while others are related to the magmatism/ volcanism activity. The others morphological features are plain land which belong to Ciranjang and Bandung depression. In interpreting geological structures, topography map and DEM were used together with field data particularly the landscape faulting indication and flow pattern. The compiled data of morphology, stratigraphy and landscape in the study area showed that the geomorphology of the area could be differ into several unit which are structural hill, non-structural hill, and plain morphology units. Sedimentary structural hill unit were develop in Rajamandala hills starting from the Cianjur-Bandung border, Solitary hills geomorphological unit developed in Cililin area, and the developed plain unit developed in Ciranjang and Cililin area

Fulfillment Of Water Needs With Rainwater Harvesting Concept at Campus Universitas Padjadjaran, Jatinangor, West Java SUGANDA, BOMBOM RACHMAT; Barkah, Mochamad Nursiyam; Iskandarsyah, Teuku Yan Waliyana Muda; Natasia, Nanda; Dwi Hadian, Mohamad Sapari
Journal of Geological Sciences and Applied Geology Vol 2, No 2 (2017): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v2i2.13449

University of Padjadjaran (Unpad) as a means of education and research has need of water large quantity. Until now meeting the needs of water was carried out as a conventional namely the usage of groundwater. Through the passing of time, the constant use of groundwater and land use change in the catchment area may pose a risk of ground water crisis. Rainwater in the university environment has large potential with an average annual rainfall is 961.92 mm. The concept of rainwater harvesting by using potential water which be runoff will become the source of water to the fulfillment of a need. Unfortunately, rainwater that become runoff can contain bacteria and chemical contents that may be harmful to health. It is necessary for the screening process using filtration and membrane technology that can clean water and produce safe water to drink.

POLA PERSEBARAN DAN ESTIMASI CADANGAN ANDESIT PADA DESA CILULUK, KECAMATAN CICALENGKA, KABUPATEN BANDUNG Swastika, Arif; Syafriyono, .; Dipo, Caesario; Pratama, Ahmad Yuda; Kartanegara, Sony Malik; Khorniawan, Wahyu Budhi; Sayyidi, Muhammad; Natasia, Nanda
Bulletin of Scientific Contribution 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

LITOFASIES ENDAPAN KUARTER DI WILAYAH DKI JAKARTA Listyono, Girlly Marchlina; Arfiansyah, Kurnia; Natasia, Nanda; Alfadli, Muhammad Kurniawan; Pranantya, Pulung Arya
Bulletin of Scientific Contribution Vol 14, No 1 (2016): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Bay of Jakarta is covered of Qartenary deposits with terrestrial deposits intercalation with marine deposits. Interaction between those depositional environment produce deposits which have lithofacies variation. Rapid development of Jakarta impact on impossibility in finding outcrop. This research gives changes for detailed Quarternary deposit lithofacies study through 22 wells with depth range about 120-450 metres and depth total 6.556,61 metres. Terrestrial deposit characterized by domination of relatively coarse clastics and content of remaining roots, woods, plants, high content of quartz, lithic fragment, calcareous and oxidated appearace. Marine deposit characterized by finer clastics, contain remain of shells, fosil, coral, limestone fragments, glauconites, calcareous. The lithofacies variation of Quartenary depost from the wells indicate lateral and vertical variation change, also on coastline shifting either by transgression or regression. Keywords : deposits, Jakarta, quartenary, sediment Jakarta merupakan daerah teluk yang tersusun oleh endapan kuarter dengan karakteristik litologi yang beragam. Sedimen penyusun endapan kuarter Jakarta dipengaruhi oleh proses sedimentasi lingkungan pengendapan darat dan laut. Interaksi antara dua lingkungan pengendapan tersebut menghasilkan endapan yang memiliki variasi litofasies. Dengan pesatnya pembangunan di Jakarta menjadikan kesempatan untuk melihat singkapan sangat kecil. Penelitian ini memberikan kesempatan untuk melihat litofasies endapan kuarter Jakarta dengan lebih jelas melalui 22 sumur bor dengan kedalaman berkisar 120 – 450 meter dan total tebal 6.556,61 meter. Endapan darat dicirikan oleh dominansi klastika yang relatif kasar dan kandungan sisa akar, kayu, tumbuhan, kaya butiran kuarsa, fragmen litik, kerikilan, serta sifat karbonatan dan kenampakan teroksidasi. Batas antara keduanya sepanjang periode Kuarter memperlihatkan variasi secara vertikal dan lateral dan perubahan garis pantai baik transgresi maupun regresi. Kata Kunci : endapan, Jakarta, kuarter, sedimen

Geomorfologi dan Ciri Fasies Vulkanik Pada Sungai Cihideung dan Ciparikalih, Sub Das Cibadak, Gunung Salak, Jawa Barat Natasia, Nanda; Mardiana, Undang; Alfadli, Muhammad Kurniawan
Bulletin of Scientific Contribution Vol 16, No 2 (2018): Bulletin of Scientific Contribution GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

ABSTRACTSalak Mount is a volcanic complex located in the south of Jakarta. This mountain area is included in the area of Sukabumi Regency and Bogor Regency, West Java. The peak part is a forest area whose management of the forest area was originally under the Perhutani Public Corporation Forest Management Unit (KPH) Bogor, but since 2003 it has been an expansion area of the Gunung Halimun National Park, and is managed as Gunung Halimun-Salak National Park. This research begins with the analysis of topographic maps to determine the geomorphological characteristics of the study area. These geomorphological characteristics include river flow patterns, land use and slope. At this stage it can be distinguished as many as nine recognizable geomorphological units. The next stage is field observation to find out the surface geological conditions of the study area. at this stage two stratigraphic cross sections were made which passed the Cihideung and Ciparikalih. From the results of geomorphological analysis, the research area can be divided into nine geomorphological units which are compiled based on their morphographic, morphometric and morphogenetic characteristics. Two stratigraphic cross sections through the Cihideung River and Ciparikalih River trajectories are made based on field observations with a measured section method. In both trajectories, there are six volcanic facies that make up the research area.. Keywords: Salak Mount, Cibadak Sub Das, Volcanic Facies, Geomorphology ABSTRACKGunung Salak merupakan kompleks gunung berapi yang terletak di selatan Jakarta. Kawasan rangkaian gunung ini termasuk ke dalam wilayah Kabupaten Sukabumi dan Kabupaten Bogor, Jawa Barat. Bagian puncaknya merupakan kawasan hutan yang pengelolaan kawasan hutannya semula berada di bawah Perum Perhutani Kesatuan Pemangkuan Hutan (KPH) Bogor, tetapi sejak 2003 menjadi wilayah perluasan Taman Nasional Gunung Halimun, dan dikelola sebagai Taman Nasional Gunung Halimun-Salak. Penelitian ini diawali dengan analisis peta topografi untuk mengetahui ciri geomorfologi daerah penelitian. Ciri ciri geomorfologi tersebut diantarana pola pengaliran sungai, tata guna lahan, serta kemiringan lereng. Pada tahapan ini dapat dibedakan sebanyak sembilan satuan geomorfologi yang dapat dikenali. Tahapan selanjutnya adalah pengamatan lapangan untuk menetahui kondisi geologi permukaan daerah penelitian. pada tahapan ini dibuat dua buah penampang stratigrafi yang melewati sub Das Cihideung dan sub DAS Ciparikalih. Dari hasil analisis geomorfologi, daerah penelitian dapat dibagi menjadi sembilan satuan geomorfologi yang disusun berdasarkan ciri morfografi, morfometri dan morfogenetiknya. Dua buah penampang stratigrafi melalui lintasan Sungai Cihideung dan Sungai Ciparikalih dibuat berdasarkan pengamatan lapangan dengan metoda penampang terukur. Pada kedua lintasan tersebut dapat diketahui enam fasies vulkanik yang menyusun daerah penelitian. Kata Kunci: Gunung Salak, Sub Das Cibadak, Fasies Vulkanik, Geomorfologi.

Stratigrafi Vulkanik Sub DAS Cibadak Implikasinya terhadap Kegiatan Gunungapi Salak Lereng Timur MUTAQIN, DEDEN ZAENUDIN; Mardiana, Undang; Mohammad, Febriwan; Alfadli, Muhammad Kurniawan; Natasia, Nanda
Bulletin of Scientific Contribution Vol 17, No 1 (2019): Bulletin of Scientific Contribution GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc.v17i1.20904

Penelitian Stratigrafi rinci mengenai daerah vulkanik masih jarang dilakukan. Hal ini biasanya dikarenakan oleh kondisi lapangan yang sulit ditempuh. Akan tetapi, penelitian fasies vulkanik ditujukan untuk mengetahui perkembangan gunungapi secara geologi baik dari segi kebencanaan atau potensi. Penelitian ini berlokasi di Sub DAS Cibadak Lereng Timur Gunung Salak untuk mengetahui perubahan litologi baik secara lateral maupun vertikal. Permasalahan dipecahan dengan Observasi lapangan dan karakteristik permukaan. Data lapangan berupa lintasan-lintasan stratigrafi berdasarkan daerah sub DAS Cibadak yang terdiri dari sungai cibadak, cikuda, cipanengah dan cimenteng. Berdasarkan fasies vulknik dari keseluruhan analisis , terdapat 6 kelompok fasies dari muda ke tua yaitu Block and ash flow deposit 2 salak, lava flow 2 salak, block and ash flow deposit 1 salak, lava flow 1 salak, pumice flow deposit salak dan scoria flow deposit pra salak.

HIERARCHICAL 3D MODELING IN COMPLEX CARBONATE RESERVOIR by COMBINING DETERMINISTIC AND STOCHASTIC APPROACH Natasia, Nanda; Alfadli, Muhammad Kurniawan
Bulletin of Scientific Contribution Vol 17, No 2 (2019): Bulletin of Scientific Contribution : GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

ABSTRACTThis paper shows how to model the 3d complex carbonate reservoir by combining deterministic and stochastic method. 3d facies model is the most important step in building reservoir static model because the distribution of another properties will depends on this model. a good facies model is needed in building a good model. The nature complexity of carbonate facies itself makes the modeling are even more chalangging. Deterministic geological interpretation is modelled by trend modeling while the rock type distribution is distributed inside each facies stochastically. This field is divided into five zones. These zones represent depositional cycle occurred within carbonate formation. The facies is divided into four facies; Reef, Lagoon, Platform, and slope. a reservoir rock type was done by using RT distributions. According to Geological concept, reservoir quality distributions have different trend either vertical or horizontal. Horizontally, a good reservoir should be located in Reef facies and the poor reservoir quality should be located in slope facies. Vertically, reservoir quality should get better from bottom to top in every reservoir zoneKeywords: Pore types, Diagenetic prosses, Carbonate Reservoir

Co-Authors . Irawati Abdurrokhim, . Adhiperdana, Billy G. Adi Hardiyono, Adi Alfadli, Muhammad Kuniawan Andi Agus Nur, Andi Agus Barkah, Mohamad Nursiyam Bombom Rachmat Suganda, Bombom Rachmat Darojat, Akmal Maulana Deden Zaenudin Mutaqin Deden Zaenudin Mutaqin Dian Hari Saputra, Dian Hari Dipo, Caesario Dwi Hadian, Mohamad Sapari Edy Sunardi Faisal Helmi Febriwan Mohammad Febriwan Mohammad, Febriwan Girlly Marchlina Listyono, Girlly Marchlina Hartawi Riskha Hartawi Riskha, Hartawi Ildrem Syafri Iskandarsyah, Teuku Yan Waliyana Muda Ismawan Ismawan Ismawan Ismawan, Ismawan Iyan Haryanto, Iyan Johanes Hutabarat Kartanegara, Sony Malik Kurnia Arfiansyah Kurnia Arfiansyah, Kurnia M Revanda Syahputra Mochamad Nursiyam Barkah Muhammad Kurniawan Alfadli Muhammad Nursiyam Barkah, Muhammad Nursiyam Mutaqin, Deden Zaenudin Nisa Nurul Ilmi Pratama, Ahmad Yuda Pulung Arya Pranantya, Pulung Arya Saputra, Mulyana Sayaf, Ival Umar Sayyidi, Muhammad Suryadi, Adi Swastika, Arif Syafriyono, . Tiggi Choanji Tristan Aulia Akhsan Undang Mardiana Vijaya Isnaniawardhani Wahyu Budhi Khorniawan Yuniarti Yuskar Yusi Firmansyah, Yusi Yuyun Yuniardi

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