摘要
应用有机岩石学和分子地球化学的手段和方法,对鄂尔多斯盆地西南缘三叠系延长组长7段暗色泥岩和长8油层组原油,进行地球化学精细定量分析,研究了长7段暗色泥岩地质地球化学特征,评价了西南缘三叠系延长组长7烃源岩生烃潜力,并对长8油层组原油展开精细油源对比分析.结果表明:鄂尔多斯盆地西南缘三叠系延长组长7段暗色泥岩有机质丰度高、类型好、成熟度高,与盆地本部长7优质烃源岩具相近似的电性、岩性和地球化学特征,为一套优质的烃源岩.长8油层组原油在母源性质、沉积环境、成熟度等方而与长7段烃源岩有相近似的特征,二者具有较好的亲缘关系,长8原油来自长7段烃源岩.
Based on the methods of organic petrology and GC-MS, Triassic Chang 7 mudstone and Chang 8 crude oil were collected from the southwestern margin of the Ordos basin for a geochemical fine quantitative analysis. The geochemical characteristics of the hydrocarbon source and the hydrocarbon generating potential were discussed. The results showed that Chang 7 mudstone is still a major source rock in the study area with a high organic matter abundance, good types and characteristics of high maturity. At the same time, the geochemical features of the Chang 8 crude oils were investigated. Chang 8 crude oil and Chang 7 source showed similar characteristics in the aspects of resource properties, sedimentary environment and maturity. Therefore, Chang 8 crude oil mainly derived from the source rocks of the seventh members of the Yanchang formation in the southwestern mar^in of the Ordos basin.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第3期1-6,13,共7页
Journal of Lanzhou University(Natural Sciences)
基金
国家重点基础研究发展计划(973计划)项目(2012CB822000)
国家科技重大专项“大型油气田及煤层气开发”(2011ZX05044
2011ZX05001)
关键词
烃源岩
油源分析
鄂尔多斯盆地
hydrocarbon source rock
oil source analysis
Ordos basin
