穿过山谷的河流，可能穿过地下水位和它下边的不渗透岩石。
A river cutting a valley may cut through a water table and the non-porous rock beneath it.
在某些地方，两个不渗透岩石层，把一个渗透岩石层夹在中间。
In some places, a layer of porous rock is sandwiched between two layers of non-porous rock.
隔层是指油气田开发过程中对流体运动具有阻挡作用的不渗透岩石。
The restraining barrier was defined as the non-permeable rocks that blocked the flow during the production of oil and gas development.
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