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Berita Sedimentologi
Published by Forum Sedimentologiwan Indonesia
ISSN : 08539413     EISSN : 2807274X     DOI : https://doi.org/10.51835/bsed
Core Subject : Science,
Earth & Planetary Sciences
BERITA SEDIMENTOLOGI aims to disseminate knowledge on the field of sedimentary geology to its readers. The journal welcomes contributions in the form of original research articles, review articles, short communications and discussions and replies. Occasionally, Berita Sedimentologi also includes field trip reports and book reviews, which are published only after going through peer-review processes. The main geographical areas of interest are Indonesia and SE Asia, however contribution from the rest of the world is also welcome. Berita Sedimentologi covers broad topics within sedimentary geology, particularly on depositional processes and their records in the rocks, petrology, sedimentology and stratigraphy of both siliciclastic and carbonate rocks; sequence stratigraphy, paleontology, biostratigraphy and sedimentary geochemistry. The journal also accepts articles on interdisciplinary research in sedimentary basin analysis, including large-scale basin geodynamics processes, mechanism of sedimentary basin formation, earth surface processes, sediment routing systems, petroleum geoscience and applied sedimentary geology analysis for mining and engineering geology.
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Geologi
Articles 4 Documents
 1 
Search results for , issue "Vol 34, No 1 (2016)" : 4 Documents clear
Structural Development, Deposition Model and Petroleum System of Paleogene Carbonate of the Engkabang-Karap Anticline, Onshore Sarawak John Jong; Frank Kessler; Steve Noon; Tran Quoc Tan
Berita Sedimentologi Vol 34, No 1 (2016)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (13130.264 KB) | DOI: 10.51835/bsed.2016.34.1.106

Abstract

To further investigate the hydrocarbon potential of the 400 km2 large Eocene - Oligocene carbonate body of the Engkabang-Karap Anticline, onshore Sarawak, high-resolution 2D seismic data, aero-gravity and magnetics were acquired by JX Nippon in 2009 and 2010. Interpretation of the latter confirmed the existence of a large carbonate-cored anticline, previously drilled by Shell in 1959-1960 and proving sub-economic gas in a massive 272m section of tightly cemented and dolomitized limestone, with little or no matrix porosity/permeability retained.Recent drilling results of Engkabang West-1 by JX Nippon confirmed the presence of gas in tight carbonate reservoirs, consisting of mainly mudstone and wackestone, but DST flow rates proved to be un-economic. The latest biostratigraphic analyses of the Engkabang wells indicate the presence of a number of key stratal events related to regional unconformities and hiatuses, suggesting that the basin ramp area saw periods of compression, inversion and/or uplift. The new seismic data indicate significant structural deformation, including strike-slip tectonism and local overthrusting, not seen on older seismic, nor noticed from the interpretation of surface geology. There is also seismic evidence of a low-angle detachment plane, linked to a zone of increased tectonism commonly referred to as the Baram Line. Other than in the nearby Lambir Hills, there is hardly any visible sign of major deformation on the surface, whilst biostratigraphic data of the Engkabang wells suggest the last folding event occurred during the Pliocene. Associated with elements of compressive folding, thrusting and strike-slip movements, the study area seemed to have undergone strong tectonic stresses caused by movements along the nearby Baram Line and Belait Wrench system.This resulted in active mud volcanism, with the active Karap mud volcano located to the southwest of Marudi Township. Post-folding, peneplanation truncated the anticline, followed by a cover of Quaternary alluvial deposits. The proposed structural model, an overthrust system rooted in a low-angle detachment plane, explains the occurrences of both shallow oil and deep gas, including mud volcanism. This trapping mechanism may also be present in other areas of onshore Sarawak and can be considered as a new hydrocarbon play. Although the petroleum system is relatively well-established with significant potential upside, technical challenges remain to further derisk the carbonate play. The tight reservoir facies encountered in both wells suggest well-developed fracture systems will be needed to improve flow rates, but fracture orientation can only be mapped with properly designed 3D seismic coverage.
A Photographic Journey through the Cretaceous-Tertiary Stratigraphy of the Meratus Mountains-Barito Basin Margin, SE Kalimantan J.T. (Han) van Gorsel
Berita Sedimentologi Vol 34, No 1 (2016)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (8518.61 KB) | DOI: 10.51835/bsed.2016.34.1.107

Abstract

The SE margin of the Barito Basin shows a relatively simple succession of WNW dipping beds, brought to the surface during Late Miocene or younger uplift of the Meratus Mountain Range. Outcrops of Cretaceous - Miocene rocks can be studied east of the Trans-Kalimantan Highway East and NE of Banjarmasin, between Martapura in the south and Rantau and Kandangan in the north.A vast body of literature exists on the geology of this region. For references see the 'Bibliography of the geology of Indonesia and surrounding areas' (online at www.vangorselslist.com)The photos shown here were taken by the author in 2010, during a fieldtrip reconnaissance along the uplifted eastern margin of the Barito Basin along the SW Meratus Range. I’d like to thank Afin Sjapawi and Ellen de Man (ExxonMobil) and Agus Pujubroto and Roy Widiarta (Sugico) and others for guidance and help with logistics.
Short Note: New Carbonate Outcrops in the Badung Peninsula, Southern Bali Herman Darman
Berita Sedimentologi Vol 34, No 1 (2016)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2577.973 KB) | DOI: 10.51835/bsed.2016.34.1.108

Abstract

Recent excavations, facility constructions and road cuts in the Badung Peninsula, southern Bali have provided additional exposure to the Selatan Limestone Formation. This short note highlights interesting features of the newly discovered outcrops, which are situated near popular touristic destinations including the beaches of the south coast and Garuda Wisnu Kencana Cultural Park.Although the geology is relatively simple, the varying facies in the outcrops indicate a range of depositional processes. Overall, the limestone beds are flat. The dips of the layers are less than 10° at different directions. The limestones exposed at the observation locations consist of various types of limestones, which are essentially dominated by mudstone and packstone. Homogenous grains, classified as calcarenite to calcirudite, are also found abundant in several other units.
Excursion Report: Kepulauan Seribu Field Trip - Modern Carbonate Depositional Environment in the Outline of Jakarta Muhammad T. Gandaprana; Taufan Tryastono; Muhammad Irwan Pernando; Achmad Chaidar
Berita Sedimentologi Vol 34, No 1 (2016)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2500.437 KB) | DOI: 10.51835/bsed.2016.34.1.109

Abstract

In February 2015, the Padjadjaran University (Universitas Padjadjaran - UNPAD) Sedimentology Research Team held an excursion to Kepulauan Seribu (Thousand Islands) in the Java Sea, offshore northern Jakarta. The trip was not just about having fun and luxurious escape, but more importantly it was to enjoy the adventure with pocket-friendly expenses and gain new geological knowledge directly from the field. For a team that comprises young geologists, every side of the earth is interesting especially in relatively remote areas where earth processes’ imprints are preserved better; the geological phenomena can be traced back to its formation in the past and deduced of the impact in the future.

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