• 责任者：Liu Cunge (Basin & Reservoir Research Center ; China University of Petroleum ; Beijing 102249 ; China) ; Li Tao
• 刊名：Journal of Chengdu University of Technology
• 出版年：2010
• 卷期：37(1)
• 关键词：中奥陶世 ; Middle Ordovician ; 晚奥陶世 ; Upper Ordovician ; 塔里木盆地 ; Tarim Basin
• 页码：p.55-63
• 图表：10 illus., 1 table, 31 refs.
• 分类号：1200
• issnNo：ISSN1671-9727
• isbnNo：CN51-1634/N

It is necessary to newly study the stratigraphic division of Middle-Upper Ordovician and the characteristics of the first episode karstification of Middle Caledonian along with the oil and gas exploration in the peripheral regions of the Akekule uplift in Xinjiang. Through comparing and analyzing the bore cores, FMI image logging, NGS and conodont fossil, the argillaceous limestone segment under the GR peak of O₃q (Upper Ordovician Qiaerbake Formation) belongs to Upper Ordovician, and the thickness of O₃q is controlled by the bed form of shoal facies of O₂yj (Middle Ordovician Yijianfang Formation). The Yuqi regions in the north are greatly influenced by the first episode karstification of Middle Caledonian.