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.

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。

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In addition, this paper deduce identification method suitable for Overpressured gas reservoir waterflood by means of that of normal pressure gas reservoir.

另外，还借鉴传统正常压力气藏的水侵识别方法，通过改进，推导出适用于异常高压气藏水驱识别的方法。

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Generally, such gas reservoir rock is in the uncompacted state, and their variation with pressure and petrophysical parameters is very different than normal pressure gas reservoir system.

这类气藏储集层岩石一般处于欠压实状态，岩石物性参数及其随压力的变化规律和正常的压力系统气藏相比有很大的差异。

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The mains gas was being operated within normal pressure parameters and there were no signs to suggest the 20th Century pipe needed replacing urgently, although there were national plans to replace pipe networks whenever they came within 30m of a domestic building.

BBC: Shrewsbury gas explosion 'no-one's fault' HSE concludes

Normal matter, which is mostly gas, has pressure and that resists gravity.

ECONOMIST: Astronomy