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Bulletin of Scientific Contribution : Geology
Published by Universitas Padjadjaran
ISSN : 16934873     EISSN : 2541514X     DOI : doi.org/10.24198/bsc%20geology.v18i1
Core Subject : Science, Social, Engineering,
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Environmental Science
BSC Geology adalah jurnal yang dikelola oleh Fakultas Teknik Geologi Universitas Padjadjaran,terbit 3 kali dalam setahun (April, Agustus, dan Desember), yang menerbitkan karya tulis ilmiah dalam bidang kebumian terutama yang berkaitan dengan geologi seperti : Petrologi Paleontologi Geomorfologi Stratigrafi Geologi Dinamik Geologi Lingkungan dan Hidrogeologi Geologi Teknik Geokimia Geofisika Sedimentologi. Setiap artikel yang akan diterbitkan adalah bersifat tanpa biaya (no processing charges dan no submission charges). Dewan redaksi dan penerbit tidak pernah meminta bayaran untuk penerbitan pada jurnal ini. Tujuan dari jurnal ini adalah untuk memperkaya pengetahuan dan informasi tentang ilmu kebumian dan dapat dimanfaatkan untuk kemaslahatan bersama.
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Geologi
Articles 7 Documents
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Search results for , issue "Vol 13, No 1 (2015): Bulletin of Scientific Contribution" : 7 Documents clear
SISTEM PANAS BUMI DAERAH KALAWAT, KABUPATEN MINAHASA UTARA, PROVINSI SULAWESI UTARA Yamin, Riza Asyari; Patonah, Aton; Hardiyono, Adi; Hadi, Muhammad Nur
Bulletin of Scientific Contribution Vol 13, No 1 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1099.101 KB) | DOI: 10.24198/bsc.v13i1.8385

Abstract

Kalwat Geothermal Field administratively is located in North Minahasa District, North Sulawesi Province. Litologies of this research area divided by pyroclastic flows and lava. The heat source of this location comes from Mahawu Mountain that located in the southwest outside the research area. Lithology which acts as the cap rock layer is form by pyroclastic flow that has clay minerals which impermeable. Based on petrographic and PIMA abalysis, the alteration minerals that arise are dominated bu montmorillonite and halloysite, so the alteration type of this research area is argilic type and located at the northwest and southwest of research area. The water type that appears are dilute chloride-bicarbonate type and bicarbonate type. Based on the calculation of paleotemperature and geothermometer, there is increase of temperature during the form of mineral and the recent temperature. This is due to increased of volcanic activity in the research area. This research area is water-dominated and moderate temperature system that has range of temperature at 209-2100 C.
STUDI GEOLOGI DAN GEOFISIKA POTENSI HIDROKARBON FORMASI AIR BENAKAT LAPANGAN X CEKUNGAN SUMATERA SELATAN Simorangkir, Fenry; Haryanto, Iyan; -, Nurdrajat; Firmansyah, Yusi
Bulletin of Scientific Contribution Vol 13, No 1 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1402.537 KB) | DOI: 10.24198/bsc.v13i1.8390

Abstract

X field is part of the South Sumatra Basin with an area of 359,6 km2. This study is focused to discuss potential hydrocarbons in x fiels. In this study, the discussion will be focused on the Air Benakat Formation. The method used is based on the interpretation of seismic and well. Based on the results of the analysis of the petrophysic of the FS, HA, and BS well shows average Netpay on Air Benakat Formation is 180 m, with a cut-off Volume Shale 0.4, cut-off PHIE 0.12 and cut-off Saturation Water 0.71. As for the Netpay from reservoir itself is average 12.415 m. Geological modeling based on the results obtained by petroleum leads three zone with two reservoir zones. For reservoar A, the most potentially zone is the zone of Lead-1 with with a resources amount of 716.82 MMBO, Zone of Lead-2 with a resources amount of 398.89 MMBO, and zone of Lead-3 with a resources amount of 108.14 MMBO. For resevoar B, the most potentially zone is the zone of Lead-1 with a resources amount of 662.13 MMBO, Lead-2 Zone with a total resources of 368.46 MMBO, and zone of Lead-3 with a total resources of 99.89 MMBO.
KARAKTERISTIK BATUAN SEDIMEN BERDASARKAN ANALISIS PETROGRAFI PADA FORMASI KALIBENG ANGGOTA BANYAK Purasongka, Novianti Wahyuni; Syafri, Ildrem; Jurnaliah, Lia
Bulletin of Scientific Contribution Vol 13, No 1 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1482.72 KB) | DOI: 10.24198/bsc.v13i1.8382

Abstract

Administratively, the research areas included in the district of Semarang, Central Java Province. This research was conducted at Jeragung River with the object of claystone and sandstone. In physiographic, rocks in the study area are in Kendeng Basin, and parts of Anggota Banyak Kalibeng Formation. This study aims to determine the characteristics of sedimentary rocks mainly sandstones, based on petrographic analysis to determine the source of the sediment and diagenesis processes that formed. Based on observations of six sandstone samples from areas of research included in Feldspatic Wacke. Provenance analysis of six samples of sandstone with using Dickinson and Suczek triangles, shows the origin of sediment is arc magmatic. Diagenesis phase which occurs is eogenesis characterized by compacting and leaching, mesogenesis marked by cementation and recrystallization, as well as the replacement and deformation marks telogenesis process.
SISTEM PANASBUMI BERDASARKAN ANALISIS GEOKIMIA AIR PANAS DAERAH AMOHOLA DAN SUMBERSARI, KECAMATAN MORAMO, KABUPATEN KONAWE SELATAN, PROVINSI SULAWESI TENGGARA Aprilia, Fitriani Dewi; Yuningsih, Euis Tintin; Patonah, Aton; Rezky, Yuano; Yushantarti, Anna; Nurdin, Asep
Bulletin of Scientific Contribution: GEOLOGY Vol 13, No 1 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (841.483 KB) | DOI: 10.24198/bsc geology.v13i1.8391

Abstract

The research area is located in Amohola and Sumbersari, Moramo sub-district, Konawe South regency, Southeast Sulawesi Province. Geographically located between 122°35’6,07" – 122°45'58,94" BT dan 4°5'20,28" – 4°16'10,85" LS. The research areas have a stratigraphy consisted of Meta-limestones, Phylite, Schist, Quartzite, Conglomerates, Limestones, Carbonate Sandstone, Claystone, and sediment surface. Hot waters have temperatures ranging from 37,5oC to 50oC. The fluid geochemical data affirm that the Amohola area has Chloride type of water, which indicates it is close to the heat source, whereas in Sumbersari area has Bicarbonate water type, which indicates that the fluid has affected by meteoric water. Geothermal system in these two areas assumed that has separated by tectonic activity and the emersion of the lithology affected the chemical content of the hot fluid. The Geotermometer indicates that the subsurface of Amohola manifestations temperatures are around 146°C (medium enthalpy), whereas in Sumbersari 43°C (low enthalpy).
STRATIGRAFI BATUAN DAERAH SELAJAMBE DAN SEKITARNYA, KECAMATAN SELAJAMBE, KABUPATEN KUNINGAN PROPINSI JAWA BARAT -, Abbas; Hamdani, Ahmad Helman; Muhamadsyah, Faizal
Bulletin of Scientific Contribution Vol 13, No 1 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1104.782 KB) | DOI: 10.24198/bsc.v13i1.8383

Abstract

Geographically, the research area is located at 108° 27' 7.3548" BT - 108° 32' 7.3572" BT and 07° 0' 9.6336" - 07° 5' 9.6324" LS. Administratively belongs to Selajambe District, Kuningan Regency, West Java. Based on the lithostatigraphy aspect, the research area is divided into four units which are (from the oldest) : Sandstone Unit (Tmbp), Monomic Breccia Unit (Tmbx), Volcanic Breccia Unit (Qbv) and Tuff Unit (Qt).Geological history of the region began at Middle Miocene, research area was deep sea environment, submarine fan depositional system due to turbidite mechanism, to formed sandstone unit (Tmbp). With increasing sediment supply without the accommodation space inadequate to sediment were prograding and made closer the source area, following by sedimentation of rough material to form the monomic breccia unit (Tmbx). At Miocene -Pliocene periods there was an increase of tectonic activity that caused the rocks to folded, jointed and faulted. During the Pleistocene, area of research has become the terrestrial environment and in that time volcanism was occured to formed the volcanic breccia unit (Qbv) and are conformably overlain by tuff unit (Qt) at the top.
POTENSI HIDROKARBON FORMASI AIR BENAKAT, LAPANGAN ‘CA’, CEKUNGAN SUMATERA SELATAN Prawoto, Adycipta Anis; Firmansyah, Yusi; -, Nurdrajat; Sunardi, Edy
Bulletin of Scientific Contribution Vol 13, No 1 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1117.452 KB) | DOI: 10.24198/bsc.v13i1.8392

Abstract

Field ‘CA’ located in the South Sumatra Basin with an area of 6433 Km2. This study aimed to evaluate the hydrocarbon potential of Air Benakat Formation. Based on the results of the petrophysical analysis from well HA, BA, PA, RI and SE show the results are : Vsh cut off 0.34, Phie cut off 0.136 and SW cut off 0.59. Determination of reservoir netpay performed on HA well, that have thick of netpay 14.638 meters. The results of picking seismic horizon are time and depth structure maps of Air Benakat Formation and Gumai Formation. The map was made for determining lead in the research area. Calculation of estimated hydrocarbon reserves in the research area shows the value of OOIP is 345 MMBO.
FASIES DAN LINGKUNGAN PENGENDAPAN BATUGAMPING FORMASI PARIGI DI DAERAH PANGKALAN, KARAWANG, JAWA BARAT Fernando, Yogi; Syafri, Ildrem; Jambak, Moh. Ali
Bulletin of Scientific Contribution Vol 13, No 1 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2353.439 KB) | DOI: 10.24198/bsc.v13i1.8384

Abstract

Facies and depositional environments were studied to determine the growth of the carbonate rocks of Parigi Formation in Pangkalan District, Karawang, West Java. The study was conducted at nine outcrops to identify the characteristics of the macroscopic observations. Some thin section of limestone sample was taken at each location of the observations used to make microscopic analysis. Macroscopic and microscopic analysis of twenty one rock sample classified into six facies, namely: coral bafflestone facies, coral bindstone facies, algae - foraminifera packstone facies, foraminifera packstone facies, interbedded wackestone – grainstone facies, and mudstone facies. A composite log created on the outcrops around G.Guha to determine the stratigraphic of Parigi Formation in Pangkalan District. Facies succession in the composite log grouping facies into several depositional facies associations, namely: fore reef facies, offreef slope facies, reef front facies, and reef flat facies. Depositional environments are fore reef and core reef.

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