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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 36, No 1 (2016)" : 4 Documents clear
Baram Line or West Baram Line? A Discussion with Late Prof. H.D. Tjia on Its Nomenclature in Jong et al. (2016) Franz L. Kessler; John Jong
Berita Sedimentologi Vol 36, No 1 (2016)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (922.237 KB) | DOI: 10.51835/bsed.2016.36.1.97

Abstract

This note summarises the unedited correspondence and discussion we had with late Prof. H.D. Tjia on the above topic, starting with an initial email received by the corresponding author of the article “Structural Development, Deposition Model and Petroleum System of Paleogene Carbonate of the Engkabang-Karap Anticline, Onshore Sarawak” by Jong et al. (2016) published in Berita Sedimentologi, Vol. 34, p. 5-25.
Modern Fluvio-Lacustrine System of Lake Singkarak, West Sumatra and Its Application as An Analogue for Upper Red Bed Fm. in the Central Sumatra Basin Enry Horas Sihombing; Nadya Oetary; Iqbal Fardiansyah; Reybi Waren; Endo Finaldhi; Faizil Fitris; Habash Semimbar; Satia Graha; Abdullah F. Talib; Willy R. Paksi
Berita Sedimentologi Vol 36, No 1 (2016)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4465.429 KB) | DOI: 10.51835/bsed.2016.36.1.98

Abstract

Paleogene synrift fluvio-lacustrine rocks in western Indonesian basins are viable and prolific petroleum plays. However, due to active tectonics and confined environment, reservoir distribution and geometry of these Paleogene rocks are highly complex. In order to better understand and identify stratigraphic relationships and facies geometries in Paleogene synrift reservoirs, a field study on analogous modern alluvial-fan and axial-fluvial deltas in Lake Singkarak has been performed by investigating data from various elements of the depositional system. The results of this study illustrate how an integration of grain texture, faunal analysis, depositional facies, and stratigraphic stacking patterns in a modern depositional environment can characterize the complexity of reservoir geometry, reservoir quality and their distribution, both laterally and vertically.This study focuses on modern sediment of Sumpur axial-fluvial delta and Malalo alluvial fan delta in the northern part of Lake Singkarak, West Sumatra Province. Seven depositional facies were recognized in the Sumpur axial-fluvial delta including fluvial, upper and lower distributary channel, subaqueous distributary channel, mouth bar, shoreline, and abandoned delta. From a sand quality and facies geometry perspective, the lower distributary channel, subaqueous distributary channel and mouth bar facies are associated with the most favourable reservoir potential. The Malalo alluvial-fan delta can be subdivided into four depositional facies including upper, middle, lower, and subaqueous fan facies. The highest reservoir quality exists in the lower and subaqueous fan facies. These two deltaic systems exhibit that the highest quality reservoirs occur in the more distal setting and their distribution in the axial-fluvial delta is more regionally extensive than it is in the alluvial fan delta.The model from Lake Singkarak was then compared to Paleogene reservoirs in “NAT” Field, Central Sumatra Basin. The field produced hydrocarbons from synrift deposits within Upper Pematang Group. The comparison was done with an objective to use Lake Singkarak as the analog depositional model for the Upper Pematang Group.
Alluvial - Fluvial Architecture of Synrift Deposits: An Observation from the Outcrops of Brani Fm., Ombilin Basin, West Sumatra Ari Wibowo; Iqbal Fardiansyah
Berita Sedimentologi Vol 36, No 1 (2016)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2654.748 KB) | DOI: 10.51835/bsed.2016.36.1.99

Abstract

Synrift sediments are currently a major focus of both academic research and industrial interest related to petroleum exploration, particularly with regard to their reservoir potential. Reservoirs are alluvial - fluvial deposits with a variety of sedimentary architectures. Their complexity requires good knowledge of basic sedimentology and use of outcrop analogies. The Brani Fm. of the Ombilin Basin has good outcrops that can be used as surface geology model. This paper uses measured outcrop data from the synrift, alluvial - fluvial sediments to characterize reservoirs, revealing that reservoir properties, such as porosities and permeabilities have wide ranges. Thicker sand body geometries in channel assemblages have good connectivity. Utilizing outcrop data is a useful analogue for the surrounding subsurface to tie into the geophysical data.
Longshore Bar Deposits in a Modern Fluvial-Dominated Delta: A Case Study from the Wulan Delta, Demak, Central Java, Indonesia Hasan Tri Atmojo; Achmad Rizal; Farchan Nauval; Djati Wicaksono Sadewo; Adrian Hanenda; Hadi Nugroho; Anis Kurniasih; Irfan Cibaj
Berita Sedimentologi Vol 36, No 1 (2016)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3061.685 KB) | DOI: 10.51835/bsed.2016.36.1.100

Abstract

The Wulan Delta is located about 30km NE of Semarang city, at the northern coast of Central Java. The delta began to develop in Quaternary with sediment being supplied by the Wulan River. In the last ten years, a longshore bar deposit has been developing at the northern to northeastern part of the delta, reflecting a change in depositional style from a river-dominated delta to a more wave/ longshore current-dominated system.Field work was done recently to determine the stratigraphic pattern, lateral distribution, sand geometry, and the origin of these longshore bar deposits. This included core sampling, sedimentological description and lithology correlation. Forty core samples were taken and 34 out of the 40 cores were used in correlation and interpretation. Qualitative analyses (granulometry) were then conducted on the cored sand deposits to get the sorting, skewness and kurtosis values.The longshore bar deposit of the Wulan Delta was formed by longshore currents that reworked sediment material to the shoreline and deposited sands laterally around the river mouth. Sediment transport dynamics influenced saltation swash and backwash, which are interpreted from the presence of swash cross-stratification as a characteristic of deposition in the foreshore area. The longshore bar deposit was deposited progressively seaward due to rapid sediment influx from up-river and limited accommodation space. The geometry of the sand deposits was measured for three segments of longshore sand bars. At STA LSB 1 it is 2773m long, 830m wide and 0.75m thick. At STA LSB 2 it is 1082m long, 272m wide and 0.5 m thick; and at the last station it is 1276m long, 374m wide and 1m thick.

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