In delivery layers, the efforts driving hydrocarbon are mainly buoyancy and capillary force, and caprock plays an role of capillary resistance.
在运载层中推动油气运动的作用力主要是浮力和毛细管力，而盖层则起着毛细管阻力作用。
The problem of capillary potential theory is that the hypothesis of pore shapes in soil is far from reality and the type of driving force is not considered all-sidedly.
指出毛管势理论对土壤孔隙形状的概化严重失实，对水驱动力种类考虑的不够全面；土水势理论的问题出现在对理论的过分简化上；
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