摘要
Stratigraphy has been accepted by most geologists and widely applied to oil and gas exploration and development since it was introduced into China due to its wide applicability,feasibility,high accuracy and predicability.It has played an important role in oil and gas exploration and development in China.The main depositional system of the Shahejie 2nd Formation is the beach and bar in Dawangbei Sag;But the beach-bar sandy body,the thickness of which is thin,change very quickly in the landscape orientation,distribution of which is complicated.The exploration of the beach-bar sandy body is very hard.At present,the research of inner structure and void distribution on beach and bar sandy body is not consummate all over world and is unsubstantial in research area.In this paper base on the data of core,logging,3D seismic,etc.,we analyze the kigh resolution sequence and the evolvement of sedimentary facies,and distribution of reservoir body and the establishment of play.