根据地层压力与静水压力的比值大小，可将地层压力分为异常高压、异常低压和正常压力三种压力状态。
Reservoir pressure can be divided into normal pressure, abnormal high pressure and abnormal low pressure in terms of the ratio between formation pressure and hydrostatic pressure.
以正常压力系统封闭气藏的物质平衡方程序为基础，建立一种利用累积产气量计算气藏地层压力的方法。
On the basis of the material balance equation, this paper develops a method to predict the formation pressure using cumulative production data for normal pressure confined gas reservoir.
在自由交替带地下水供排平衡，保持正常的地层压力。
In free replacing zone, Me pressure keeps normal because recharge and discharge of pore fluids is in equilibrium.
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