Injected wet saturated steam moving override on top reservoir and fingering along high permeability zone have been the main problem of cyclic steam stimulation.

• 注入油层的湿饱和蒸汽向油层顶部超覆推进以及沿高渗透区域指进一直是蒸汽吞吐开采过程中的主要矛盾。