Application of broadband amplitude-preserving processing with integrated quality control to S gasfield,Xihu depression,East China Sea
With poor quality of seismic data,S gasfield,Xihu depression,East China Sea,features complex geological conditions and strong vertical heterogeneity in reservoirs,which may make the characterization of sandbodies with different thickness challenging by using seismic data and lead to findings in great discrepancy between prestack inversion and actual drilling.Thus,integrated broadband amplitude-preserving processing into reservoir prediction,one technology of integrated quality control was adopted to conduct a fine test on parameters and scientific quality-control analysis for some key linkages,such as interference-wave together with ghost and multiple suppression from broadband amplitude-preserving processing,and gather optimization.Results show that(i)there exists nu-merous information on frequency in seismic-processing results;(ii)the signal-to-noise ratio is significantly improved;and(iii)infor-mation on remote trace gather is so natural and real,and AVO attributes of CRP gather are evident.It is concluded that the technology of broadband amplitude-preserving processing can effectively eliminate the influence of interference wave,protect low-and high-fre-quency signals of seismic data with effect,and increase an accuracy to predict reservoirs with various thickness.
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