Abstract：The propagation characteristic of acoustic wave in borehole that penetrates compact carbonate formation is analysed by doing model experiment. Aluminium alloy is used to model compact carbonate formation, through which a modeled borehole in 10:1 scale penetrates. This modeled borehole is cylindrical, whose depth is 0.4m, diameter 0.3m, and central borehole diameter 0.02m. An acoustic full wave train is received when borehole is filled with water. Some main characteristics of refracted compressional wave, refracted shear wave and Stoneley wave in full wave train observed in this experiment coincide with the theoretical ones, while the real ratio of P-wave amplitude to S-wave amplitude and their geometric divergence do not tally with the theoretical ones. It is deemed that the main reason why the dif-ference appears is that theoretical analysis neglects the directivity of acoustic source.
