Abstract：In the same site of Jianghan basin, three different array forms: triple circular, T-shaped and L-shaped, are used for observation and comparison experiments. The results show that the dispersion curves of the three arrays are basically the same; the energy concentration degree of the three arrays is obviously different. The energy concentration degree of the triple circular arrays is the highest, and the concentration degree of the L-shaped and T-shaped arrays is also higher in the range of 2.0-4.6 Hz. Compared with the T-shaped and L-shaped arrays, the wave velocity contrast of the triple circular arrays near the stratigraphic interface is more obvious; that is, the triple circular arrays is more reliable and accurate than the other two array forms.
