The purpose of cement bond log (CBL) under increasing borehole pressure is to differentiate micro annulus from bypasschannel.
在井内加压下进行水泥胶结测井带压作业,其目的是将微环空与串槽区分开。
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This paper deals with the mechanism of bypasschannel and mainly discusses the theory, technics and interpretation method of using neutron Lifetime Log(NLL)to evaluate channeling.