Study On Fine Structure Interpretation And Potential Reservoir Distribution Of The Third Member Of Shahejie Formation On North Beidagang

According to the theory of sequence stratigraphy,tectonic geology,sedimentary petrology,seismic sedimentology,under the guidance of this,make full use of existing seismic data with well logging data and drilling core data,research on the third member of Shahejie Formation(Es3)on north Beidagang,emphasis on the three layers of sand.Establishment of isochronous stratigraphic framework.Combined with seismic data and logging data,reservoir prediction is made for the three stage of sand formation.The sedimentary system,fine interpretation of structure and reservoir prediction should be carried out,which will provide the direction for further exploration.1.In the sequence division and correlation in the process of the research target section is divided into three sequences based on each layer thickness map,the source reservoir capping,migration and conservation research in a unified framework,and provide the basis for the prediction of favorable area late.2.From the geological structure,the target stratum is affected by the large fracture and the strike of the fault.The fracture background of the north Beijing harbor tectonic belt is complex,the fault development is more,and the stopping time is early.These faults strictly control the spatial distribution of the oil and gas and the composition of the traps,and have an important influence on the accumulation of oil reservoirs.3.The analysis of sedimentary system,analysis of the use of heavy mineral data and seismic facies and attributes,determine the main source of Es3,clear north Gangbei area mainly by Xiaozhan,Gang dong Island and the Shen Qing Zhuang source control,mainly developed fan delta depositional system.4.Through reservoir inversion,the horizontal and vertical resolution of seismic data can be effectively and effectively improved.Based on it,the well seismic combination can be used to identify the spatial shape of fine sand bodies and fine reservoirs in Es2-Es3.According to the above analysis,to evaluate the north wing of north oil and gas distribution,the whole stratum is a single slope high northeast southwest low,easy to form reservoirs and lithologic traps in the slope under the background of different types of traps provide a favorable place for oil and gas reservoirs.And then promote the next step in oil and gas exploration.