准噶尔盆地南缘西段中上组合层序地层分析

Sequence Stratigraphic Analysis on the Mid-upper Sectional Combination in the Southern Junggar Basin

运用层序地层学原理,结合钻井、测井和地震资料分析,在四棵树凹陷古近系-新近系紫泥泉子组、安集海河组和沙湾组识别出4个长期旋回层序界面和8个中期旋回层序界面,将古近系-新近系划分为3个长期旋回、7个中期旋回,在此基础上建立了四棵树凹陷古近系-新近系的层序地层格架,并对地层格架中的沉积特征进行了分析。

By using high-resolution sequence stratigraphy theory,in combination with the data of outcrop profile,drilling core and well logging,on the basis of recognition of the type,Ziniquanzi Formation,Anjihaihe Formation and Shawan Formation in the west of the Junggar Basin,it is divided into 3long sequences(LSC)and 7 middle term cyclical sequences(MSC),then are analyzed Paleogene-Neogene sequence stratigraphic framework can be recognized in Sikeshu Sag,sedimentary characteristics in the stratigraphic framework.