Orthogonal polynomial spectrum subtraction for multiple attenuation
压制多次波的正交多项式谱减法

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.