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| Analysis on waveform trains in physical simulation on acoustic logging with linear phased array transmitter |
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CHEN Xue-lian1,QIAO Wen-xiao2,SUN Jian-meng1,SU Yuan-da1,ZHANG Xiu-mei1
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(1. Faculty o f Geo-Resource and In formation in China University of Petroleum，Dongying 257061, China;2. School oj Resource and In formation Technology in China University of Petroleum，Beijing 102249, China)
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| Abstract: |
| The waveform trains gotten by laboratory simulation on acoustic logging with phased array transmitter was studied by the amplitude and frequency of the waveforms. The influential factors of delay time exerted on neighboring elements and element number were analyzed. The experimental results show that by increasing delay time exerted on neighboring elements, steered radiation angle of the phased. array becomes larger and larger, and generation conditions of the refracted compressional wave and the refracted shear wave are reached successively, and the refracted compressional wave, refracted shear wave and Stoneley wave are strengthened respectively. And simultaneity the dominant frequency of compressional or shear wave reaches to the highest value. By increasing the number of the elements, the amplitudes of compressional wave and shear wave are enhanced in the generation condition. |
| Key words: linear phased array acoustic logging emitter |
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