摘要
应用岩石热解实验、显微镜下观察、有机元素分析和镜质组反射率等分析方法,通过有机质丰度、类型、成熟度及生物标志化合物等方面研究,对鄂尔多斯盆地镇探1井中生界和古生界烃源岩地球化学特征进行了综合评价。古生界太原组和山西组烃源岩有机质丰度低,干酪根类型以腐殖型为主,有机质处于过成熟阶段,气态烃生成能力较强,综合评价为差烃源岩;中生界延长组和延安组烃源岩有机质丰度较高,干酪根类型以腐殖型为主,有机质处于成熟阶段,液态烃生成能力较强,综合评价为中等烃源岩。古生界有机质原始生物组合中陆源植物和水生生物含量相近,在湖相还原条件下堆积和保存;中生界有机质原始生物组合中陆源植物稍占优势,在湖相弱还原——还原条件下沉积。
Using analytic methods of thermal decomposition experiment, microscopic observation, organic elemental analysis and vitrinite reflectance, and based on study on abundance, types, maturity, and biomarkers of organic matter, this paper comparatively analyzes the organic geochemical characters of Mesozoic and Palaeozoic source rocks of well-Zhentanl in Ordos Basin. The source rocks of Ty and Jy are comprehensively evaluated as medium source rocks, owning high generating capability of liquid hydrocarbon and having high organic content, the kerogen are mainly humic kerogen, and the organic matters are now in the mature stage. The source rocks of Psh and Pt are comprehensively evaluated as poor source rocks, owning high generating capability of gaseous hydrocarbon and having low organic content, the kerogen are mainly humic kerogen, and the organic matters are now in the over mature stage. Mesozoic organic matters whose original biologic assemble are dominated by terrestrial plants and deposited in weak-reducing and oxygen free environment of lacustrine facies. The Palaeozoic organic matters whose original biologic assemble are both terrestrial plants and aquatic community are accumulated and preserved in the reducing environment of lacustrine facies.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2012年第5期10-14,111,共5页
Petroleum Geology and Recovery Efficiency
基金
国家重点基础研究发展规划"973"项目"多种能源矿产共存成藏(矿)机理与富集分布规律"(2003CB214606)
