盖层存在毛细管封闭、异常孔隙流体压力封闭两种封闭类型。
There exist capillary seals and abnormal fluid pressure seals in the caprock.
地壳抬升可使油气藏盖层毛细管封闭能力增强，压力和烃浓度封闭能力减弱；
Crust uplift can increase the capillary sealing ability of caprock and decrease the pressure and hydrocarbon concentration of caprock.
大厚度盖层毛细管封闭能力强，易形成异常孔隙流体压力和抑制浓度封闭作用。
The caprock with big thickness owns strong capillary sealing ability, can form abnormal pore fluid pressure and the restraining hydrocarbon concentration sealing.
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