Abstract：Several airgun theories for off-shore oil exploration are studied and according to the request of practical parameters, we respectively simulated the pressure wavelet in nearfield and farfield in condition of single gun action or airgun array action. And an algorithm to simulate anywhere pressure wavelet base on the nearfield pressure wavelet observations was presented in this paper. The results show that it was suitable using the air-gun for the deep crust exploration by increasing the volume of airgun and coherent airgun array.
