The water from offshore oil field chiefly comes from injection water, edge water and bottom water.

海上油田产出水主要来源于注入水、边水和底水。

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The driving mechanism for the Midale pools is interpreted to be a combination of edge water and bottom water drive systems.

油藏驱动机制可能为边水和底水两种类型的结合。

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So, after reservoir watering out as edge water and bottom water enters, the gas phase permeability will decrease greatly, and strong water lock effect will happen.

因此，当边水和底水进入储层发生水淹后，气相渗透率将极大降低，存在较强的水锁效应。

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