Crust uplift can increase the capillary sealing ability of caprock and decrease the pressure and hydrocarbon concentration of 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；
The Ordovician weathering crust has good sealing and covering conditions of aluminum rock on the top, favorable for formation of large-scale stratum and lithologic trap.
奥陶系风化壳上覆铝土质岩类，封盖条件好，有利于形成大型地层、岩性圈闭。
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