The syn-rift petroleum system of Central Sumatra: field trip summary

Carnell, Andrew; Butterworth, Peter J.

doi:10.29118/ipa.1160.1011.1018

Cited by 3 publications

(4 citation statements)

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“…The excellent potential level of the Kiliranjao oil shale coincides with the Carnell et al, (2013) study. They stated that the dark brown, faintly laminated, highly organic-rich shale, with predominant algal matter, contains TOC varying Widayat et al (2013) who analyzed the oil shale samples from Kiliran (Kiliranjao) area, show the result as follows.…”

Section: Organic Geochemical Analysissupporting

confidence: 85%

Eo-Oligocene Oil Shales of the Talawi, Lubuktaruk, and Kiliranjao Areas, West Sumatra: Are they potential source rocks?

Iqbal¹

2014

Indonesian J. Geosci.

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To anticipate the increasing energy demand, additional data and information covering unconventional fossil fuels such as oil shale must be acquired to promote the usage of alternative energy sources to crude oil. The Talawi and Lubuktaruk regions situated within intra-montane Ombilin Basin, and the Kiliranjao area assumed to be located in a small intra montane Kiliranjao Sub-basin are occupied by Eo-Oligocene sediments of Sangkarewang and Kiliran Formations, respectively. Field activity, geochemical screening techniques, and organic petrographic analysis, supported by SEM mode, are methods used. Most of the oil shale sequence is typically of an organically rich-succession comprising predominantly well-bedded, laminated and fissile, brownish to dark grey organic-rich shales and mudstones. The exinite macerals within oil shale comprise mainly Pediastrum-lamalginite with minor cutinite, resinite, liptodetrinite, sporinite, bituminite, and rare Botryococcus-telalginite. Therefore, the oil shale deposits can be described as "lamosites". Minor vitrinite maceral is also recognized. TOC analysis on selected shale samples corresponds to a fair up to excellent category of source rock characterization. The kerogen is suggested to be of mixed Type II and Type I autochthonous materials such as alginite, with minor allochthonous substances. Oil samples collected appear to be positioned within more oil prone rather than gas prone. Thermal maturity of the oil shales tends to show an immature to marginally/early mature stage. By evaluating all the results of geochemical and organic petrological analyses conducted on shale lithologies (shale and mudstone), it can be concluded that the oil shales in those areas are effective source rocks having a favourable potential for generating shale oil or gas to be included as alternative energy resources in the future.

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Section: Organic Geochemical Analysissupporting

confidence: 85%

Eo-Oligocene Oil Shales of the Talawi, Lubuktaruk, and Kiliranjao Areas, West Sumatra: Are they potential source rocks?

Iqbal¹

2014

Indonesian J. Geosci.

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“…The region has been regionally mapped by Silitonga and Kastowo (1995). The geology of this area has also been studied by Coster (1974), Darman and Sidi (2000), and Carnell et al (2013). Several researchers, i.e.…”

Section: Introductionmentioning

confidence: 99%

“…This basin is a coal producing depression in Sumatra Island. The main objective of this paper is to recognize the lithofacies association, mainly to identify The Lithofacies Association of Brown Shales In Kiliran Jao Subbasin, West Sumatra Indonesia lithology and depositional sequences of Brown Shale Unit based on a recent fieldwork in Karbindo Coal Mine which is part of the Pematang Formation as defined by some previous investigators (Aswan et al, 2009;Carnell et al, 2013;Widayat et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

The Lithofacies Association of Brown Shales In Kiliran Jao Subbasin, West Sumatra Indonesia

Sunardi¹

2015

Indonesian J. Geosci.

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The lithofacies association, mainly lithology and depositional sequences of the Brown Shale Unit of Pematang Group was studied based on recent fieldwork at Karbindo Coal Mine, in Kiliran Jao Subbasin,West Sumatra, Indonesia. The lower part of the Brown Shale Unit consists of coal and limestone facies which were deposited in a marginal lacustrine area. The limestone was generated by evaporatic processes characterized by the presence of primary calcite crystals. The upper part of the unit, from bottom to top, is composed of six facies associations, among all: amalgamated massive thick bedded shales, interlaminated shales and siltstones, interbedded grey and red shales, fossiliferous shales, massive thick bedded shales, and interlaminated shale and sandstone facies. Those facies were deposited in a shallow to deep water lacustrine environment, characterized by their lithology compositions, sedimentary structures, and fossil contents. The unit has such as high content of reworked organic matters-bearing shales and mudstones. Turbiditic sedimentary structures, gastropods, and bivalves are common.

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“…The development of shale hydrocarbon requires depth interval information with high britteness values based on knowledge of geology and rock mechanics as a basis for hydraulic fracking planning that can connect natural fractures to drain hydrocarbons optimally (Grieser and Bray, 2007;Jin et al, 2014). This research was conducted on Brownshale formation, Pematang Group, Bengkalis Sub-basin as the main source rock in the Central Sumatra Basin based on well log data of well BS-03 (Carnell, 1997;J. Katz, 1995).…”

Section: Introductionmentioning

confidence: 99%

Feasibility Study on the Application of Dynamic Elastic Rock Properties from Well Log for Shale Hydrocarbon Development of Brownshale Formation in the Bengkalis Trough, Central Sumatra Basin, Indonesia.

Suranto

Buntoro

Prasetyadi

et al. 2021

J. Geoscience Eng. Environ. Technol.

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In modeling the hydraulic fracking program for unconventional reservoir shales, information about elasticity rock properties is needed, namely Young's Modulus and Poisson's ratio as the basis for determining the formation depth interval with high brittleness. The elastic rock properties (Young's Modulus and Poisson's ratio) are a geomechanical parameters used to identify rock brittleness using core data (static data) and well log data (dynamic data). A common problem is that the core data is not available as the most reliable data, so well log data is used. The principle of measuring elastic rock properties in the rock mechanics lab is very different from measurements with well logs, where measurements in the lab are in high stresses / strains, low strain rates, and usually drained, while measurements in well logging use the principle of measured downhole by high frequency sonic. vibrations in conditions of very low stresses / strains, High strain rate, and Always undrained. For this reason, it is necessary to convert dynamic to static elastic rock properties (Poisson's ratio and Young's modulus) using empirical equations. The conversion of elastic rock properties (well logs) from dynamic to static using the empirical calculation method shows a significant shift in the value of Young's Modulus and Poisson's ratio, namely a shift from the ductile zone dominance to the dominant brittle zone. The conversion results were validated with the rock mechanical test results from the analog outcrop cores (static) showing that the results were sufficiently correlated based on the distribution range.

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The syn-rift petroleum system of Central Sumatra: field trip summary

Cited by 3 publications

References 0 publications

Eo-Oligocene Oil Shales of the Talawi, Lubuktaruk, and Kiliranjao Areas, West Sumatra: Are they potential source rocks?

Eo-Oligocene Oil Shales of the Talawi, Lubuktaruk, and Kiliranjao Areas, West Sumatra: Are they potential source rocks?

The Lithofacies Association of Brown Shales In Kiliran Jao Subbasin, West Sumatra Indonesia

Feasibility Study on the Application of Dynamic Elastic Rock Properties from Well Log for Shale Hydrocarbon Development of Brownshale Formation in the Bengkalis Trough, Central Sumatra Basin, Indonesia.

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