1.Four isolate barrier beds occurened usually in boundary surface of each internal architecture unit in channel sandbody, i. e. find bed, muddy pebble bed, plant clasts bed and diagenic bed.

1.在河道砂体内部不同次实体界面，通常存在着4种隔挡，粒物质隔挡、泥砾隔挡、植物碎屑隔挡和岩隔挡。