高精度河砂同期展示的关键技术与应用效果

油田开发阶段,同期展示河、砂、泥的关系对于理清砂体的内部结构、点砂坝之间的关系及部署注采井位都非常重要。文中以渤海海域A油田B砂层为靶区,使用90°相移数据体,在多种刻画河道、砂体算法优选的基础上,实现河砂数据体融合,并展示河、砂、泥同期关系。通过与井资料结合研究证实,数据体反映的河、砂、泥关系等与井数据吻合。运用该方法,研究了河道发育演化、点砂坝内部结构,实现了从成因、过程视角来恢复和重建曲流河道历史演化过程,为剩余油的挖潜及高产调整井的部署提供了有力依据。

Key technology and application of high precision contemporaneous display of river channel and sand body

Contemporaneous reflection of river,sand and mud on the seismic slice is the research that geologists and seismologists always would like to achieve.Especially at oil field development stage,the research of internal structure of sand bodies and point bar is of great significance for deploying the location of injection and production wells.Taking B sand body of A Oilfield,Bohai Sea Area,as the target region,on the basis of 90 degree phase shift data volume,the optimized property of river channel and precisely described sand body,the river and sand attributes data fusion was realized.Based on this,the relationship between river,sand and mud were contemporaneously presented.Combined with well log data,it reveals that the profile and section data are in accord with well data.Using this method,the development and evolution of river channel and the internal structure of point bar were studied.Finally,the historical evolution process of meander river channel was recovered from the cause and process perspective,which provides a useful evidence for remaining oil exploration and highly productive adjusting well deployment.