Reservoir Characteristics Study Of Chang 6~2 Formation In Zhangjiaya Area,the Southeastern Of North Of Shanbei Slope

This paper selects Zhang Jia Ya,located in the southeastern of Shanbei slope,as the research object for further understanding there servoir characteristics of Chang 6~2 reservoir and its relationship with oil and gas enrichment.The Chang 6~2 reservoir is divided into eight single sand bodies.Guided by petroleum geology and combined with logging,well logging and testing data of characteristics of Chang 6~2 reservoir,this paper sums up the relationship between reservoir and enrichment of oil and gas.Nose-uplift structure is developed in the East-West direction,and there is a certain succession between the layers.Facies,such as river mouth bar,underwater distributary channel,and interdistributary bay,are developed in Chang 6~2 reservoir.Channel sand body with good physical properties enriches oil and gas,and generally the thicker the sand body is,the thicker the effective thickness is.The sandstone of Chang 6~2 reservoir is mainly fine-medium grained feldspar sandstone.The dissolution improves the reservoir physical property,while the cementation function generally makes it worse,which is bad for the migration of oil and gas.Over all the characteristics of the study area,Chang 6~2 reservoir is divided into three categories: ? and ? and ?.Oil layer develops in the vertical,and it is thin.Oil layer changes rapidly in the horizontal,and the connectivity is relatively poor.In plane,reservoir distribution is different in different layers.It relates close between oil and gas enrichment and sand,physical property.