In the single depositional time unit in which the thick sandbodies were widely deposited, independent fluid systems may exist in the overlapping sandbodies due to the lateral migration of the channel.

• 指出在厚砂体连片分布的单个沉积时间单元内，河道的侧向迁移可使不同期叠置砂体各自具有独立的流体系统；