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.
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。
Pressure factor is defined as the ratio of initial reservoir pressure and the corresponding hydrostatic pressure.
压力系数定义为原始地层压力与静水压之比值。
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