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首页> 外文学位 >Basin and thermal history, geochemistry and pressure development of the Simpson Group (Middle Ordovician) based on part of Garvin, Grady and McClain counties, the Anadarko Basin, Oklahoma.
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Basin and thermal history, geochemistry and pressure development of the Simpson Group (Middle Ordovician) based on part of Garvin, Grady and McClain counties, the Anadarko Basin, Oklahoma.

机译：基于俄克拉荷马州阿纳达科盆地的加尔文，格雷迪和麦克莱恩县的一部分，辛普森集团（中奥陶纪）的盆地和热史，地球化学和压力发展。

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摘要

The Anadarko Basin contains abnormal pressured lithologies. The presence of overpressures implies the existence of seals to maintain pressures over time. The study area and Simpson Group lithologies were selected to test for the existence of a diagenetic pressure seal.; Pressure data indicate that there is no diagenetic pressure seal at present, and modeling results show that past excess pressures are not likely to have been maintained until the present. Pressure mechanisms of hydrocarbon generation and compaction are not effective in maintaining overpressures until the present.; The thermal history of the study area can be approximated with a simple, decreasing heat flow over time. At present, the Simpson Group is in the oil and gas windows; however, kerogen data indicates little or no remaining generation potential. Total organic carbon values are insufficient for generation of hydrocarbons to produce overpressures. {dollar}rmdeltasp{lcub}18{rcub}Osb{lcub}SMOW{rcub}{dollar} and fluid inclusion temperature data indicate that diagenesis occurred in an open system at deeper burial depths. The fluid inclusion temperature data also suggest that most of the diagenetic mineralization took place at 100{dollar}spcirc{dollar}C (212{dollar}spcirc{dollar}F). This temperature and the modeling thermal history indicate that diagenesis took place between 312 to 260 Ma (Pennsylvanian to Permian), after major faulting and around the deepest burial depths for the Simpson Group. Carbon and oxygen isotope compositions indicate that diagenetic mineralization was fairly uniform, but petrographic studies show that mineralization was complex and not uniform laterally. Hydrocarbon expulsion began after diagenetic mineralization occurred.
机译：阿纳达科盆地含有异常受压的岩性。超压的存在意味着存在密封以维持压力随时间的变化。选择研究区域和Simpson Group岩性来测试是否存在成岩压力密封。压力数据表明，目前尚无成岩压力密封，建模结果表明，直到现在都不可能维持过去的过大压力。直到现在为止，碳氢化合物生成和压实的压力机制都无法有效地维持超压。研究区域的热历史可以通过简单，逐渐减少的热流随时间来估算。目前，辛普森集团正处在石油和天然气领域。然而，干酪根数据表明几乎没有或没有剩余的发电潜力。总有机碳值不足以产生碳氢化合物以产生超压。 {dollar} rmdeltasp {lcub} 18 {rcub} Osb {lcub} SMOW {rcub} {dollar}和流体包裹体温度数据表明成岩作用发生在深埋深度的开放系统中。流体包裹体温度数据还表明，大多数成岩成矿作用发生在100 {spcirc {dollar} C（212 {dollarspcirc {dollar} F）。该温度和模拟的热历史表明，在辛普森群发生重大断层之后，并且在最深的埋藏深度附近，成岩作用发生在312至260 Ma（宾夕法尼亚至二叠纪）之间。碳和氧同位素组成表明成岩成矿作用相当均匀，但岩相学研究表明成矿作用复杂且横向不均匀。成岩成矿作用发生后开始排烃。

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  • 作者

    Mitcheltree, David Brian.;

  • 作者单位

    The University of Tulsa.;

  • 授予单位 The University of Tulsa.;
  • 学科 Geology.; Geochemistry.
  • 学位 Ph.D.
  • 年度 1998
  • 页码 294 p.
  • 总页数 294
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地质学;地质学;
  • 关键词

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