鄂尔多斯盆地三叠系延长组长7油页岩工业利用前景分析

Analysis of Industrial Utilization Prospect of Upper Triassic Chang-7 Oil Shale in Ordos Basin

运用测井-有机地球化学综合识别方法，识别和统计了大量钻孔的长7油页岩厚度，结果显示，长7油页岩的分布面积大约4．5×10^10mm^2，总体积达0．835×10^12m^3，总蕴藏量约为1．9×10^12t。有机、无机地球化学分析与工业评价分析显示．尽管长7油页岩的有机质丰度高（平均TOC为13．75％），母质性质好，但是，由于成熟度较高、已发生了强烈的生排烃作用．造成了油页岩以低品位为主（较低的含油率和较低的发热量）。因此，应针对长7油页岩富铀、富硫和相对富集某些微量元素的特点，寻求综合利用的有效途径。

By using a logging-geochemically comprehensive identifying method, lots of oil shale thickness data of boreholes are identified statistically. The result shows that distribution area of the Chang-7 oil shale is about 4.5×10^10mm^2, with a total volume of about 0.835×10^12mm^3,and general reserves of about 1.9×10^12t. The organic and inonganic geochemical analysis and industrial evaluation show that, due to a high maturation degree and strong hydrocarbon generation and expulsion taking place in the Chang-7 oil shale, most of the oil shale is of low grade which means low oil content and low calorific value, although it has high organic matter abundance with average TOC of 13.75% and excellent quality of its kerogen. Therefore the effective way to comprehesively use the Chang-7 oil shale should be found in the light of its characteristics of being rich in uranium, sulfur and some other minor dement contents.