The pattern of seismic source excitation is one of the main factors to influence the quality of seismic data
acquisition.Based on the method of finite difference numerical simulation,we carried our forward modeling on four
typical excitation means,including elongated dynamite source,time-lapse dynamite source,facies-controlling
dynamite source and horizontal array source.Theoretically,the wavefield characteristics and energy illumination
figures of different excitation patterns under the circumstance of same dynamite charge are studied and
analyzed.The comparison and analysis on simulation results show that along with the shots increasing,the energy of
seismic wavelet shooting by array source and facies-controlling source is more accumulated,which is beneficial for
the exploration on deep layers.Moreover,time-lapse source has orientation capability.However,the energy diffuses to
the two sides as columnar source shooting,which is not beneficial for the exploration of deep layers.For horizontal
layers,time-lapse source shooting has worse effect than array source,but can increase the base interval of time-lapse
sources to improve the orientation capability and strengthen the down-going energy propagation.In actual
application,we should select the shooting means in terms of area geological conditions and seismic acquisition
cost.But for dip layer,array shooting is better than lapse shooting,and the facies-controlling shooting is best.As a
conclusion,facies-controlling source shooting is suggested for the dip formation,especially for the high-dip
formations.
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