关键词: 小波多尺度分析, 高阶累积量, 相关分析, 砂体预测

Abstract: The relationship of superposed formations in Es4 in the west of Dongying Sag is complex,the physical property varies acutely in both vertical and lateral directions,and the divergence of reflection feature is small,thus posing difficulties in discriminating sand body,especially its borders.In view of the foregoing problem and based on the theories and techniques relating to wavelet multi-scale analysis and higher-order statistics for seismic signals,the paper carries on the transformation of the seismic records using higher-order cumulants first,then the results are decomposed to multi-scales.To insure the reliability of the correlation analysis,proper multiscale seismic envelop results have been incorporated in the correlation analysis.The algorithm has been verified by theoretical modeling and actual data,especially in the aspect of capability of practical problem solving,for example,the originally obscure or weak seismic signals can be distinguished clearly after the processing using this method.As a result,the originally unrecognizable sand body and its borders become explicit.

Key words: wavelet multi-scale analysis, higher order cumulant, correlation analysis, prediction of sand body