正交偶极子声源激发声场测量

Test of the inspring field of orthogonal dipole sonic source

正交偶极子声波测井仪器中的发射换能器是最关键的部件,它决定着该仪器的性能和测量结果。为了研究该换能器,了解其有关技术特点,我们对5700的正交偶极子换能器进行了激发声场测量,得到了该换能器在圆柱界面上的声场分布图像。该图像刻画了换能器发射声波到达井壁的过程,并且肯定了发射换能器先发射高频声波、而后出现低频声波的特征,结合现有的测井资料和偶极子声波测井理论计算结果,简单分析了该特征在最新电激发波形上的应用。

The transmitting transducer is the most important part of the orthogonal dipole sonic logging tool,which affects the performance and waveforms.In order to study and comprehend the transducer,we test the acoustic field which inspired by the orthogonal dipole transducer of the 5700,and get the image of the acoustic field on the column interface.The image describes how the sonic wave inspired by the transducer arrives at the wall of a borehole,and approve the character that the transmitting transducer transmits the high frequency sonic wave before the low frequency sonic wave.Referring to the practical logging datum and the results calculated through the theory of dipole sonic logging,we simply analyze how to apply the character to the latest electric inspiring waveform.