塔里木盆地奥陶系层序界面特征及其对碳酸盐岩岩溶的控制  

The Features of Ordovician Sequence Boundaries and its Controls on Carbonate Karst in Tarim Basin

作　　者：高雁飞[1] 傅恒[1] 王同[1] 杨宏飞[1] 赵立欣[1] 

机构地区：[1]成都理工大学油气地质与开发工程国家重点实验室,四川成都610059

出　　处：《新疆地质》2015年第3期362-367,共6页Xinjiang Geology

基　　金：中国石化西北分公司勘探开发研究院协助项目(KY-S-2008-086)"塔里木盆地下古生界多类型储集体形成与成藏条件研究-塔里木盆地中央隆起带O-Z储集体形成机理;主控因素;有利储集体展布及成藏条件研究"部分成果联合资助

摘　　要：塔里木盆地奥陶系岩溶储层是重要勘探目标,理清奥陶系层序界面特征及奥陶系岩溶控制作用对进一步勘探具指导意义。在构造背景基础上,井-震结合识别出奥陶系1个一级层序界面,2个二级层序界面,6个三级层序界面。基于层序地层格架,结合钻井漏失、薄片溶蚀、地震剖面"串珠反射"等现象,在盆地内划分出4类岩溶类型:四级层序界面(高位晚期)溶蚀、三级层序界面(侵蚀不整合)溶蚀、二级层序界面(隆升不整合)岩溶、一级层序界面(造山角度不整合)岩溶,明确各级层序界面下岩溶发育模式。Ordovician karst reservoirs are important exploration targets in Tarim Basin,clarifying the Ordovician sequence boundary and its controls on Ordovician karst have instructive meaning for further exploration.Based on tectonic background and well- seismic data, one first sequence boundary,two secondary sequence boundaries,six third sequence boundaries can be identified.Using sequence stratigraphic framework and combined with drilling leakage,rock slice erosion,seismic profiles and other phenomenon,four karst categories including later high-stract sequence boundary corrosion（level 4）,erosion unconformity sequence boundary corrosion（level 3）,uplift unconformity sequence boundary karst（level2）,orogenic angle unconformity sequence boundary（level 1） karst can be identified, and the developing mode has been established.

关 键 词：塔里木盆地 奥陶系 层序界面 岩溶 

分 类 号：P618.13[天文地球—矿床学]