Feasibility Study Of Hybrid Source Acquisition In Complex Obstacle Areas

Seismic acquisition technology in complex obstacle areas has always been an important problem in the field of seismic exploration.Using land change techniques when encountering large-scale complex obstacles in land exploration will result in the loss of shallow data in obstacle areas and the decrease in the number of deep layers,which will have a greater impact on the overall effect of data.Large,the use of hybrid sources across the obstacle area can make up for the shallow information in the obstacle area,so that the integrity of the data can be guaranteed.Therefore,it is particularly important to provide a theoretical basis for the application of hybrid source acquisition technology in the demonstration of complex barriers.This paper demonstrates the feasibility of using mixed source acquisition when crossing a large obstacle zone.It is demonstrated in two ways:(1)When the target layer information cannot be obtained by using the seismic source in the obstacle zone:through the forward simulation of five geological conditions,the demonstration The problems of the single-variation acquisition technology,but the source of the obstacle source used in the hybrid source only obtains shallow information.The establishment of the near surface velocity model and the effect of migration imaging verify that even if the target layer data cannot be obtained,the mixture The acquisition of the source is beneficial to the establishment of the shallow velocity model and the offset imaging effect,which makes up for the completeness of the data and thus demonstrates the necessity of the hybrid source.(2)When the source layer is used in the obstacle area to obtain the target layer information:According to the analysis of the actual mixed source seismic data,there are serious inconsistencies in the data,manifested in SNR,wavelet phase,frequency,energy,etc.A set of seismic data processing techniques for hybrid sources,with multi-domain joint fidelity denoising,wavelet coherence processing,and amplitude consistency processing as the core,effectively resolves the differences in data and ensures consistency of data,which is a hybrid source.Acquisition technology provides technical support in the application of complex obstacles,so it is necessary and feasible to use hybrid source acquisition technology in complex obstacle areas.