Abstract:Theoretical model computation and real cases analyses showed that the thin-layer information that is less than 1/4 seismic wavelength can be acquired by analysis of seismic attributes only if special amplitude,frequency,phase and waveform can be relatively preserved.It is thus clear that the high-resolution seismic data processing based on prestack relative preservation of amplitude,frequency,phase and waveform is key of identification and appreciation of thin-layer.From the angles of the seismic processing and geologic interpretation,the paper presented separately the methods whether the corresponding appreciation can meet above-mentioned relative preservation.As concerns the former,①using test of 3-D shooting amplitude with dominant frequencies,test of 3-D shooting wavelet and statistic spectrum analysis based on monitor shot to determine whether the used methods aimed at improving resolution can meet the needs of relative preservation;②whether the high-precision velocity fields can be acquired;③whether the coincidence with the applied conditions of imaging theory in propagating medium is considered.As concerns the latter,a stable reference mark bed that can be continuously traced in whole region exists around the target (to meet the condition within a sedimentary cycle) in prospecting zone is needed.
凌云研究组. 叠前相对保持振幅、频率、相位和波形的地震数据处理与评价研究[J]. 石油地球物理勘探, 2004, 39(5): 543-552.
Ling Yun Research Group. Study of seismic data processing and appreciation based on prestack relative preservation of amplitude,frequency,phase and waveform. OGP, 2004, 39(5): 543-552.