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首页> 外文学位 >X-Ray Fluorescence and Total Organic Carbon Analysis of Delaware Basin Ordovician Age Sediments in the Ellenburger and Simpson Groups of West Texas
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X-Ray Fluorescence and Total Organic Carbon Analysis of Delaware Basin Ordovician Age Sediments in the Ellenburger and Simpson Groups of West Texas

机译：西德克萨斯Ellenburger和Simpson组特拉华盆地奥陶纪年龄沉积物的X射线荧光和总有机碳分析

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摘要

Ordovician age hydrocarbons have been drilled in the Permian Basin of West Texas since the early 1940s and have produced over a billion barrels of oil with additional natural gas. The source rock for these previously drilled Ellenburger Group reservoirs has been suggested to be the Simpson Group shales, but limited total organic carbon studies and no x-ray fluorescence analysis has been performed on the Permian Basin Ordovician rocks to determine the overall lithology and trace element enrichment relative to total organic carbon to substantiate this statement. The majority of Ordovician hydrocarbon production has occurred in faulted and structural traps in the Ellenburger, but the hydrocarbons have a different hypothesized source due to generally low total organic carbon within this group. Trace element enrichments can serve as indicators of the presence of organic material and paleoredox conditions. This study utilizes x-ray fluorescence elemental data and total organic carbon data from Permian Basin Ordovician sediments to analyze general rock lithology and to understand whether biologically- and paleoredox-sensitive trace elements coincide with total organic carbon, and if so, can these similarities give insight to the organic enrichment of these sediments and the paleoredox conditions present during their deposition. The findings of this study suggest that the Simpson Group reflects a depositional environment with intermittent layers of sandstone, green shale, black shale, red shale, and a large percentage of carbonate suggesting a shallow water marine environment. The majority of trace elements that serve as useful proxies for total organic carbon within these sediments are mostly associated with the detrital shale influx and are not associated with biological activity or paleoredox conditions. The majority of the total organic carbon values for the Simpson Group and Ellenburger Group suggest a poor (<0.5 wt. % total organic carbon) source rock with limited potential to generate hydrocarbons though fair (.5-1 wt. % total organic carbon) to good (1-2 wt. % total organic carbon) values are present in a limited number of samples. X-ray fluorescence data indicates the presence of trace element enrichments in some samples, but no clear correlation with total organic carbon is recognized.
机译：自1940年代初以来，在西得克萨斯州的二叠纪盆地已钻出奥陶纪的碳氢化合物，并利用额外的天然气生产了超过10亿桶的石油。这些先前钻探的埃伦伯格岩储集层的烃源岩被认为是辛普森群页岩，但总有机碳研究有限，并且尚未对二叠纪盆地奥陶纪岩石进行X射线荧光分析以确定整体岩性和微量元素。相对于总有机碳的浓缩来证实这一说法。奥陶纪的大部分碳氢化合物生产都发生在埃伦堡格断裂带和构造圈闭中，但由于该组中总有机碳含量普遍较低，因此碳氢化合物的假设来源不同。痕量元素的富集可作为有机物质和古氧化还原条件的指示。这项研究利用X射线荧光元素数据和二叠纪盆地奥陶纪沉积物中的总有机碳数据来分析一般的岩石岩性，并了解对生物和古生物敏感的痕量元素是否与总有机碳相吻合，如果是，这些相似性能否给出结论？洞悉这些沉积物的有机质富集以及沉积过程中存在的古氧化还原条件。这项研究的发现表明，辛普森群反映了一个沉积环境，其中有间歇性的砂岩层，绿色页岩，黑色页岩，红色页岩和大量碳酸盐岩，表明海洋环境较浅。用作这些沉积物中总有机碳有用代表的大多数微量元素，大多与碎屑页岩的涌入有关，与生物活性或古生物条件无关。辛普森集团和埃伦伯格集团的大部分有机碳总量表明，较差的有机岩（有机碳总量<0.5 wt。％）潜力虽然有限（有机碳总量为.5-1 wt。％），但产生烃的潜力有限。有限数量的样品中存在的浓度值达到良好（总有机碳含量为1-2 wt。％）。 X射线荧光数据表明某些样品中存在痕量元素富集，但未发现与总有机碳有明确的相关性。

著录项

  • 作者

    Cuyler, Joshua Robert.;

  • 作者单位

    The University of Texas at Dallas.;

  • 授予单位 The University of Texas at Dallas.;
  • 学科 Geochemistry.
  • 学位 M.S.
  • 年度 2016
  • 页码 156 p.
  • 总页数 156
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 康复医学;
  • 关键词

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