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压实盆地中的自然水力破裂是欠压实带孔隙流体排驱的关键因素之一。欠压实带可描述成被“壳”包围的一个异常孔隙流体压力带。当盆地在连续沉积（加载）和不断剥蚀（卸载）作用过程中，其“壳”的自然水力破裂动力作用是完全不同的。在加载条件下，欠压实带的顶、底壳发生剪切破裂，底壳早于顶壳。在卸载条件下，只有当剥蚀所引起的负荷压力降大于“壳”发生垂直张破裂所需要的最小负荷压力降时，壳才会破裂，且主要为顶壳破裂。对于经历了多期沉积剥蚀作用过程的地区或盆地，其欠压实带中孔隙流体的排驱可以被描述成首先向下，然后向上，再向下再向上这样一个排驱方向不断变化的间歇性过程。
Natural hydraulic fracturing in compacted basins is one of the key factors in under-pressured pore fluid drainage. Undercompacted ribbons can be described as an abnormal pore fluid pressure band surrounded by a “shell.” When the basin is continuously deposited (loaded) and continuously eroded (unloaded), the dynamics of the natural hydraulic fracturing of the “shell” are completely different. Under the loading conditions, the top and bottom shell of under-compacted ribbons are sheared and cracked, and the bottom shell is earlier than the top shell. Under unloading conditions, the shell will rupture only if the pressure drop caused by denudation is greater than the minimum load pressure drop required for the vertical rupture of the shell to occur, and the rupture of the top shell is primarily the case. For regions or basins undergoing multiple stages of denudation processes, the displacement of pore fluid in the under-pressure zone can be described as first downward, then upward, then downward again and upward such an intermittent displacement in the direction of displacement Sexual process.