The interlayer blocks off the oil and gas not only at the reservoir top,but also,if the oil column height is short,on the side.

• 夹层不但在油藏顶部对油气起封堵作用,而且在油藏高度不大的情况下也能够起到侧向封堵的作用,造成了上水下油的油水纵向分布状况和倾斜的油水界面;