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Geochemistry and possible origin of petroleum in Palaeozoic reservoirs from Halahatang Depression

机译:哈拉哈塘De陷古生界油藏的地球化学特征和可能的石油成因

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摘要

The Halahatang Depression in the Tabei Uplift of the Tarim basin is an active exploration area because it has substantial reservoir potential and contains or is near to many commercial oil fields. Geochemical analysis indicates that Halahatang oils were derived from marine carbonate source rocks deposited under anoxic reducing conditions. The maturities for Halahatang oils are corresponding to the peak of the oil window and slightly higher than the neighboring Tahe oils. The Halahatang oils feature low Pr/Ph, C_(21)/ C_(23) tricydic terpane and, C_(28)/C_(29) sterane ratios, high C_(29)/C_(30) hopane and C_(35)/C_(34) hopane ratios, a "V" shape in the distribution of C_(27)-C_(28)-C_(29) steranes and light carbon isotope ratios, similar to the Tahe oils and correlate well with the Middle-Upper Ordovician source rock. However, some source-related bio-marker parameters imply a more reducing source organofacies with more zooplanktonic contribution than that for the Tahe oils.
机译:塔里木盆地塔北隆起的哈拉哈当De陷是一个活跃的勘探区,因为它具有巨大的储层潜力,并且包含或靠近许多商业油田。地球化学分析表明,哈拉哈当油是从在缺氧还原条件下沉积的海相碳酸盐岩中提取的。哈拉哈当(Halahatang)油的成熟度对应于油窗的峰值,略高于相邻的塔河油。哈拉哈当(Halahatang)油具有低Pr / Ph,C_(21)/ C_(23)三重萜烯和C_(28)/ C_(29)甾烷比率,高C_(29)/ C_(30)hop烷和C_(35) / C_(34)ane烷比率,在C_(27)-C_(28)-C_(29)甾烷和轻碳同位素比率的分布中呈“ V”形,类似于塔河油,并且与上奥陶纪烃源岩。但是,某些与源有关的生物标志物参数意味着与塔河油相比,具有更大的动物浮游作用的源有机相减少得更多。

著录项

  • 来源
    《Journal of Asian earth sciences》 |2013年第25期|129-141|共13页
  • 作者单位

    State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China,College of Geological Science and Engineering, Shandong University of Science and Technology, Qingdao 266510, China;

    State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;

    Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China;

    State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;

    Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Biomarker; Molecular organofacies; Maturity; Oil-source correlation; Ordovician; Halahatang Depression;

    机译:生物标志物分子有机相;到期;油源相关性;奥陶纪;哈拉哈当抑郁症;

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