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首页> 外文期刊>Petroleum Geoscience >Architecture of Lower Oligocene source rocks in the Alpine Foreland Basin: a model for syn- and post-depositional source-rock features in the Paratethyan realm
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Architecture of Lower Oligocene source rocks in the Alpine Foreland Basin: a model for syn- and post-depositional source-rock features in the Paratethyan realm

机译:高山前陆盆地下渐新统烃源岩的体系结构:Paratethyan领域沉积后和沉积后烃源岩特征的模型

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摘要

Oligocene rocks are one of the most important sources of hydrocarbons within the Paratethyan realm. In the Alpine Foreland Basin (Central Paratethys) the main Oligocene source rock is the Schöneck Formation, but organic-rich rocks occur in the entire Lower Oligocene succession. Based on well-log calibration by core data, the spatial distribution and thickness variations of different Lower Oligocene source-rock facies are investigated. The deeper-water sediments are characterized by lateral continuity, but exhibit vertical variability. The latter reflects major palaeoceanographic changes in the Central Paratethys, such as the closure of seaways, basin-wide changes in salinity and in redox conditions. The upper shaly part of the Schöneck Formation has the highest source potential (>5% TOC, initial HI: 500–600 mgHC g–1TOC) and reaches its maximum thickness (c. 5 m) in a narrow belt parallel to the palaeo-shoreline.
机译:渐新世岩石是Paratethyan领域中最重要的碳氢化合物来源之一。在高山前陆盆地(中部 Paratethys),主要的渐新世烃源岩为舍内克 地层,但是富含有机质的岩石出现在整个Lower 渐新世演替。基于岩心 数据的测井标定,研究了不同的 下渐新世烃源岩相的空间分布和厚度变化。深水 沉积物具有横向连续性,但表现出 垂直变化。后者反映了中部Paratethys的古海洋学 的重大变化,例如航道的关闭,盐度和氧化还原条件下整个盆地的变化。 Schöneck组的页岩上部 具有最高的 源电势(> 5%TOC,初始HI:500–600 mgHC g –1 TOC),并在平行于古海岸线的一条狭窄带中达到其最大厚度(约5 m)。

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  • 来源
    《Petroleum Geoscience》 |2006年第4期|363-377|共15页
  • 作者单位

    Department of Applied Geosciences and Geophysics, Montanuniversit?t Leoben, Peter-Tunner-Str. 5, A-8700 Leoben, Austria (e-mail: Reinhard.Sachsenhofer@mu-leoben.at);

    Federal Institute for Geosciences and Natural Resources (BGR), Stilleweg 2, D-30655 Hannover, Germany(e-mail: hm.schulz@bgr.de);

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