Analysis on High Resolution Sequence Stratigraphy of Dongying Formation in Gaoliu Area

Based on the available core,drilling,logging and seismic data in the studied area,the theory and method were deployed to establish a sequence stratigraphic framework by recognizing and comparing the critical sequence boundaries in Palaeogane Yingcheng Formation of Gaoliu Area. There develops five sequence boundaries of high isochronic significance within Dongying Formation in which four mid-term base level cycles are divided. The sedimentary characteristics of each sequence are analyzed,it is considered that the depositional system of fan delta,near-shore subaqueous fans and lacustrine facies are developed,the distribution of depositional system are greatly different in different sequence growing times and in different time and locations.