石油实验地质2019，Vol.41Issue(1)：45-55,67,12.DOI:10.11781/sysydz201901045
鄂尔多斯盆地延长组泥页岩硅质来源与油气富集
Silicon sources and hydrocarbon accumulation in shale, Triassic Yanchang Formation, Ordos Basin
摘要
Abstract
A series of analyses, including major and trace element analysis, X-ray diffraction for bulk and clay mineral composition, Rock-Eval analysis, TOC analysis and scanning electron microscope observation, were conducted in order to determine the different silica sources and hydrocarbon accumulation between the Chang 7 member and Chang 9 member shale of the Triassic Yanchang Formation in the Ordos Basin. The Chang 72 sub-member and the Chang 9 member shale had more similarities in silica sources, mineral composition, element composition and organic geochemical characteristics, while the Chang 73 sub-member shale showed certain differences in the above properties from the other two sets of shale reservoirs. The silica in the Chang 72 sub-member and the Chang 9 member shale came from terrestrial detritus, while the silica in the Chang 73 sub-member shale showed the characteristics of two sources, namely, terrestrial detritus and hydrothermal from vents at the bottom of the lake. Both Chang 7 and Chang 9 shales are high-quality source rocks. However the contents of residual hydrocarbon and kerogen are higher, the type of kerogen is much better, and the oil saturation index is higher under the influence of hydrothermal fluid for the Chang 73 sub-member shale. Hence the Chang 73 sub-member is superior to the Chang 72 sub-member and Chang 9 member shale and has higher exploitation value.关键词
硅质来源/湖底热液/油气富集/延长组/三叠系/鄂尔多斯盆地Key words
silica resource/hydrothermal fluid/hydrocarbon enrichment/Yanchang Formation/Triassic/Ordos Basin分类
能源科技引用本文复制引用
刘国恒,于抒放,翟刚毅,邹才能,黄志龙,夏响华,石砥石,周志,陈榕,张聪..鄂尔多斯盆地延长组泥页岩硅质来源与油气富集[J].石油实验地质,2019,41(1):45-55,67,12.基金项目
国家科技重大专项项目(2016ZX05034-001) （2016ZX05034-001）
国家重点研发计划政府间国际科技创新合作重点专项(2017YFE0106300) （2017YFE0106300）
国家自然科学基金项目(41272156) （41272156）
中国地质调查项目(121201021000172121) （121201021000172121）
博士后基金项目(2018M641431)共同资助 （2018M641431）
