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。
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.
尺寸小，重量轻，频率范围宽；具有电池电压欠压和工作状态指示；可内，外供电方式；非常适合于现场和无外接电源时的使用；
Small Dimensions, lightweight; Wide frequency range; Operation status LEDs; Low-battery warning; Internal or external power supply; Suitable for filed test.
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