It is acknowledged that distribution of sandbodies in reservoirs of meandering river facies is very complex

which makes it hard to rebuild the subsurface system.Based on the analyses of formations in terrestrial basins and the development of meandering river reservoirs

we divide the meandering river reservoirs of the Yangdachengzi Formation in the Fuyu oilfield into 4 different sand groups and 21 subzones by using the hierarchical subdivision method.Based on the subdivision of subzones

we focus on the configuration of internal architecture of single sand body in meandering river reservoirs.With data of cores

dense well log and production perfor-mance

we systematically study the hierarchical interfaces

lithofacies combinations and spatial distribution and assemblage of single point bar sandbodies in the study area.The genesis and distribution of remaining oil are also discussed in this paper.The results show that

the single point bar sandbody of meandering river reservoirs in the Yangdachengzi Formation deposited in an environment with weak hydrodynamic force is controlled by two hierarchical sedimentary interfaces.The number of lateral accretion bodies is mainly 3 or 4;the included angle of la-teral accretion face ranges from 4? to 7?;the horizontal scale varies greatly.The main types of spatial combination of single sandbody are isolated type

lapping type

overlaying type and cutting-piling type.Influenced by la-teral-accreted mudstones of point bars and injection-production strategies

the remaining oil is mainly distributed in point bars

isolated and cutting-pilling sandbodies

which lays the foundation for secondary recovery.