The peak pressure attenuation of shock in water in borehole axis direction was slower than the direction vertical to the borehole axis.
水中冲击波压力峰值在炮孔轴线上衰减比垂直于炮孔轴线向上衰减慢。
A distance that characterizes how far a logging tool measures into the formation from the axis of the tool or borehole.
表征测井仪器可探测到的从仪器或井轴到地层之间的一段距离。
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