The water lock also is the major feature of two-phase flow in porous medium.In heterogeneous model, gas recovery can be enhanced by reducing gas pressure or raising drive pressure drawdown.

• 同时，水锁也是多孔介质中两相渗流的主要特征，可以通过降低压力使气体充分膨胀和提高驱替压差来提高采收率，降低封闭气量。