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A comprehensive review concerning the problem of marine crudes sources in Tarim Basin

机译：塔里木盆地海相原油资源问题综述

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摘要

The issue of source of oil/gas in the platform basin area in Tarim Basin has been debated for a long time, and the debate is focused on whether the marine oil/gas resources that have been discovered in the basin were originated from hydrocarbon sourcerocks in the Cambrian-Lower Ordovician or in the Mid-Upper Ordovician. In this paper a summary was made in regard to the major points and supporting data by the predecessors, and a discussion was conducted toward the core issues related to the study onthe oil source in the Tarim Basin area, such as choice of correlation parameters, influence of maturation and physical differentiation on oil source correlation parameters, and geological and geochemical significance of these relevant correlation indices. It is quite probable that different interpretation results could arise from the oil source correlation due to choice of parameters severely affected by the thermal maturation and physical differentiation effect, and insisted that only those parametersthat come with clearly defined geochemical significance and are less affected by thermal maturation and variations occurring during secondary evolution process are valid ones. The marine crude in Tarim Basin covers contributions that were originated fromtwo sets of hydrocarbon source rocks as mentioned above but dominated by the one from the Mid-Upper Ordovician hydrocarbon source rocks. Here oil of mixed sources occurs extensively, and crude from Cambrian sources was also discovered. It is suggested that for further study on the origin of marine crudes in Tarim Basin, the parameters used for correlation of oil sources shall be optimized, and a comprehensive set of geological and geochemical methods shall be adopted for this purpose.
机译：塔里木盆地平台盆地地区的油气源问题已经讨论了很长时间，争论的焦点是该盆地发现的海洋油气资源是否来源于塔里木盆地的烃源岩。寒武纪-下奥陶纪或中上奥陶纪。本文对前人的主要观点和支持数据进行了总结，并对与塔里木盆地地区油源研究有关的核心问题进行了讨论，例如相关参数的选择，影响等。和物理差异对油源相关参数的影响，以及这些相关指标的地质和地球化学意义。由于受热成熟和物理差异作用严重影响的参数的选择，很有可能因油源相关性而产生不同的解释结果，并坚持认为只有那些具有明确地球化学意义且受热成熟影响较小的参数在二次进化过程中发生的变化是有效的。塔里木盆地的海洋原油覆盖了如上所述的两组烃源岩，但其中以中奥陶纪烃源岩为主。在这里，混合油来源广泛，还发现了来自寒武纪油源的原油。建议为进一步研究塔里木盆地海相原油的来源，应优化用于油源关联的参数，并为此目的采用一套综合的地质和地球化学方法。

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