印度尼西亚下古泰盆地中新世巴厘巴板地层的碳氢化合物潜力和沉积环境:沉积学、钙质化石、有机地球化学和有机岩石学综合方法

IF 5.6 2区 工程技术 Q2 ENERGY & FUELS
Jamaluddin , Michael Wagreich , Kateřina Schöpfer , Reinhard F. Sachsenhofer , Maria , Diana Rahmawati
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引用次数: 0

摘要

中新世巴厘巴板地层出露于三马林达地层(Samarinda Anticlinorium),该地层是位于印度尼西亚东加里曼丹的下古泰盆地的一部分。巴厘巴板地层被认为是下古泰盆地油气田的主要源岩。这项研究综合了沉积学、有机地球化学、有机岩石学和钙质化石分析,以确定沉积环境的特征,确定有机物质的来源,并评估巴厘巴板地层的碳氢化合物潜力。所研究的地段中有一处钙质化石组合的多样性较低,其中包括异形石(Sphenolithus heteromorphus),这表明化石区 NN4 - NN5(上布迪加连统 - 朗希安统 - 下塞拉瓦利统)仅限于研究区东北部的 Air Putih 地段。研究区内发现了六个岩相组合,包括 11 个岩性,可解释为河流-三角洲-浅海成因。细粒岩相包括页岩、褐煤页岩和煤,粗粒岩相包括砂岩和砂砾岩。地球化学结果(总有机碳)表明,分析样本的总有机碳含量差异很大。有机质由 III 型(易生气)和 II-III 型(油气混合)角质组成,HI 值范围为 32 至 252 毫克 HC/g TOC。岩石评估参数 Tmax 409-441 °C 和玻璃光泽反射率值(0.40-0.67 %Rr)表明,沉积物从未成熟到边缘成熟。巴厘巴板地层的煤炭等级从亚烟煤到高挥发性烟煤 B 级不等。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Hydrocarbon potential and depositional environment of the Middle Miocene Balikpapan Formation, lower Kutai Basin, Indonesia: Sedimentology, calcareous nannofossil, organic geochemistry, and organic petrography integrated approach

The Middle Miocene Balikpapan Formation is exposed in the Samarinda Anticlinorium, which forms part of the Lower Kutai Basin situated on East Kalimantan, Indonesia. The Balikpapan Formation is considered the main source rock for oil and gas fields in Lower Kutai Basin. This study integrates sedimentology, organic geochemistry, organic petrography and calcareous nannofossil analysis to characterize the depositional environment, to determine the source of the organic matter, and to assess the hydrocarbon potential of the Balikpapan Formation. The studied sections contain at one locality calcareous nannofossil assemblages with low diversity including Sphenolithus heteromorphus, suggesting nannofossil zones NN4 – NN5 (upper Burdigalian - Langhian-lower Serravallian) are restricted to the Air Putih section in the northeastern part of the study area. Six facies associations were identified in the study area, comprising eleven lithofacies, interpreted as fluvial-deltaic to shallow marine in origin. The fine-grained lithofacies include shale, coaly shale and coal while the coarse-grained facies include sandstone and sandy conglomerates. The geochemical results (TOC) indicate that the analyzed samples have strongly varying total organic carbon (TOC) contents. The organic matter is composed of type III (gas-prone) and type II-III (mixed oil and gas prone) kerogen, with HI values ranging from 32 to 252 mg HC/g TOC. The Rock-Eval parameter Tmax 409–441 °C and vitrinite reflectance values (0.40–0.67 %Rr) indicate that the sediments are immature to marginal mature. The rank of coal in the Balikpapan Formation ranges from the sub-bituminous to the high-volatile bituminous B stage.

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来源期刊
International Journal of Coal Geology
International Journal of Coal Geology 工程技术-地球科学综合
CiteScore
11.00
自引率
14.30%
发文量
145
审稿时长
38 days
期刊介绍: The International Journal of Coal Geology deals with fundamental and applied aspects of the geology and petrology of coal, oil/gas source rocks and shale gas resources. The journal aims to advance the exploration, exploitation and utilization of these resources, and to stimulate environmental awareness as well as advancement of engineering for effective resource management.
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