Multi-wave AVO Response And Multi-wave Registration Analysis

With the continuous development of multi-wave and multi-component seismic exploration technology,combining PP-and PS-wave data can provide more reliable information to explain the reservoir characteristics and explore hydrocarbon source rocks,but the key is to register PP-and PS-wave data firstly,getting the PP-and PS-wave data in same time or depth domain.However,the technology has been one of the difficulties of multi-wave seismic data processing.Therefore,in view of the registration,this article mainly discussed the following three aspects.Firstly,research the PP-and PS-wave AVO response feature.Based on Zoeppritz equation and reflectivity method using four types of gas,saturated sandstone models,we studied the PP-and PS-wave AVO response feature,compared differences between two methods.And we studied the PP-and PS-wave differences of amplitude,phase and frequency,also analyzed the influencing factors of the registration.Research showed that there are large differences between waveform,frequency,phase of the PP and PS wave,so it can't get the satisfied result to directly matching PP-and PS-wave data based on waveform similarity.Moreover,register PP and PS wave based on the pre-stack AVO inversion and dynamic time warping(DTW).Based on the inversed three parameters,we can get the inversed PS wave in PP time domain,which compared with results based on cross-correlation.Research showed that there is higher similarity between inversed PS wave and real PS wave,we can get higher matching accuracy based on dynamic time warping(DTW).Finally,correct the waveform distortion.Because the registration of PP and PS wave is to compress PS-wave time domain to PP-wave time domain,the compression will inevitably cause the distortion of waveform,the distortion is the result of wavelet compressed actually.Therefore,this paper realized the compressed PS waveform distortion correction on the basis of filter.Research showed that waveform correction method can solve the problem of waveform distortion caused by the matching compression.