【摘要】 本文提出了一种新的压制多次波的正交多项式谱减法.将地震资料经过正交多项式变换,其高阶系数谱主要体现了多次波特征.根据多次波低阶系数谱与高阶系数谱之间的关系,估计出多次波的低阶系数谱,从地震记录正交多项式系数谱中减去多次波的系数谱得到一次波的正交多项式系数谱.该方法较好地解决了一次波和多次波在正交多项式谱混叠的问题,尤其在近偏移距有效地分离了多次波和一次波,同时能够较好地保护地震信号中的 AVO(amplitude versus offset,振幅随偏移距变化)信息.人工合成数据处理结果表明了所提出方法的有效性.更多还原

【Abstract】 Based on orthogonal polynomial spectrum subtraction,a new multiple suppression method is proposed.In the orthogonal polynomial spectrum of seismic data,the high order coefficients mainly present the multiple.By using the relationship between the low order and the high order coefficients,the low order coefficients of multiple can be derived from high order ones. By subtracting from the orthogonal polynomial spectrum of the seismic data,multiple orthogonal polynomial spectrums are removed from the seismic data.The method can separate primaries and multiples especially in near offset,which are overlapping in orthogonal polynomial spectrum,and the AVO properties are also preserved.The processing of synthetic data shows good results.更多还原