Abnormal formation fluid pressure often exists in oil-gas bearing basin.

地层流体压力异常是含油气盆地存在的一个普遍现象。

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It is of significance for guiding exploration and development and drilling engineering of the oilfield to conduct the study on abnormal formation pressure.

异常地层压力的研究对指导油田的勘探、开发和钻井工程都具有极其重要的意义。

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This paper described a method of estimating abnormal formation pressures, and discusses the following: (1) conventional formula of estimating abnormal formation pressures;

本文论述用声波时差测井估计异常地层压力的大小，阐述了三个观点：1。估算异常地层压力的一般公式；

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For example, sometimes a fetus might be diagnosed with having a congenital cystic adenomatoid malformation -- an abnormal formation in the lungs -- but actually turns out to have a diaphragmatic hernia.

CNN: Five diagnoses that call for a second opinion