Abstract：To choose the best borehole coupling medium and improve the seismic exploration excitation effect，the calculation methods of explosion load and transmitted wave specific energy based on the theory of elastic wave are built. The analytical solutions are calculated by program in Matlab；and the graphics are drawn for the comparative analysis. Then，the field experiment is conducted in typical carbonate rock site；and the experimental data are analyzed by the way of energy analysis based on the power spectrum. The theoretical calculation and experimental results show that：(1) When the coupling medium of decoupling charge is water，the seismic wave energy is the biggest，the frequency is the highest，and the signal-to-noise ratio is the lowest. (2) When the coupling medium of decoupling charge is air，the seismic wave energy is smaller than that of water，the frequency is the lowest，and the signal-to-noise ratio is the highest. So，in order to gain a good seismic excitation effect，the air should be used as the coupling medium of decoupling charge in seismic exploration，and the seismic wave energy can be made up by increasing the total charge.
2011, Vol. 30 
