周口盆地白垩纪油源岩孢粉化石颜色及其有机质类型

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SPOROPOLLEN COLOUR AND THE ORGANIC ATTER TYPE OF LOWER CRETACEOUS SOURCE MROCKS IN ZHOUKOU BASIN, HENAN PROVINCE

1.
Central Laboratory of petroleum Geology, Ministry of Geology and Mineral Resources
2. Heaan Research Institute of Petroleum Exploration and Development, Ministry of Petroleum Industry

摘要: 周口盆地位于河南东部,下白垩系在井下很发育。本文采用钻孔中的一些岩心,经过在显微镜下观察孢粉化石和有机质碎片。根据孢粉化石颜色的变化,将其有机质成熟度的标准,划分为四个阶段,即:未成熟阶段、成熟阶段、高成熟阶段、过成熟阶段。根据孢粉化石颜色特征,周口盆地的生油门限在1900米左右,在井深4000米时有机质材料已达到高成熟阶段,作者认为在这些地区,在井深1900—4000米有好的生油潜力。

Abstract: The Zhoukou Basin is located at eastern part of Henan Province where Lower Cretaceous is well developed. According to the microscopic observations on the sporopollen colour and the organic debris taken from the drilling cores, the evolution of the organic matter can be devided into 4 stages, i·e·immature, mature, highly mature, and over mature.

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