The Study On Forward Modeling Method Of Vibratory

From the second half of the last century,the vibratory began to be applied in seismic exploration.In the field of international seismic exploration,especially in the field of oil and gas exploration and development,the vibratory has become the most important source of excitation.In recent years,with the development of national economy and strategic security aspects of energy and a large number of demand,as well as geophysical technology and equipment for continuous progress and development,seismic exploration work gradually to difficult areas.At the same time with the oil exploration work more with the international market,the vibratory which has been widely used in In foreign countries is also gradually applied to the actual exploration work in China,especially the high efficiency seismic acquisition,such as Flip-Flop Sweep,Slip Sweep,Independent Simultaneous Sweeping(ISS),etc.,which improved the efficiency of exploration as well as reducing the cost of seismic exploration work greatly.Therefore,the research on the relevant principles of the vibratory seismic exploration,such as the correlation technology,the sweeping signal,the seismic response characteristics and the high efficiency vibratory seismic method,etc..It is necessary to improve the acquisition and processing capability of the vibratory seismic exploration.The main advantage of the high efficiency vibratory seismic method is improved productivity and reduced acquisition costs.However,there are a lot of data processing problems,the length of sweeping signal and the length of seismic record is much longer than that of explosive source.At the same time,the efficient collection brings the overlap of the seismic records,which requires us to make a reseach to the seismic response characteristics of the high efficiency vibratory seismic method,so that the vibratory seismic exploration can be promoted and efficient application.Therefore,the vibratory seismic exploration is studied in this paper and the forward modeling of the sweeping signal,harmonic distortion signal and seismic record is carried out.