Research On Sequence Stratigraphy Of Tenggeer-Aershan Formation In Southern Sag Of Wuliyastai Depression

Southern Sag of Wuliyastai Depression located in the northeast of erlian basin,rich in oil and gas resources,The exploration practice shows that there may be some problems in the stratigraphic contrast,and there is a lack of uniform fine sequence stratigraphic framework.The reservoirs of the target layer have large lateral variation,strong heterogeneity,and the reservoir evolution is not clear,Layer prediction and exploration and development process.Based on the theory of high-resolution sequence stratigraphy,this paper establishes the isochronous sequence stratigraphic framework in the study area by single well sequence stratigraphy analysis and even sequence stratigraphic stratigraphy.In the same time sequence stratigraphic framework,through the core,logging,logging,earthquake and other data research and analysis,identify the fan delta,lake fan,near the underwater fan,lake a total of four types of sedimentary facies The The fan delta is mainly developed in the eastern,southeastern and southwest of the depression,and the fan delta,lake fan,nearshore subaqueous fan,lake sedimentary facies,The fan delta is mainly developed in the northwest,east and southwest of the depression;the lake bottom fan is mainly developed in the deep lake area in the middle of the depression;the nearshore water main fan is mainly developed in the steep slope belt in the west of the depression.