The acoustic distribution produced by acoustic phased transducers in well
井中相控声源激发的声场

Sonic logging waveforms are different if the emit transducer is changed. There are many emit transducers in phase controlled sonic source. In this paper, some experiment results are given, in which the direction and path of sonic wave propagation produced by this phase controlled sonic source are varied. From numerically calculated acoustic distribution of sonic logging by this sonic source, it is funded that the direction aod path of sonic wave propagation in sold can been controlled by delay time too.