单道地震的子波整形问题探讨

A Discussion of Wavelet Shaping Based on Single-channel Seismic Survey

在海洋地质调查中,高分辨率数字单道地震是一种必不可少的调查手段。单道地震采用单一震源激发地震子波,会使震源子波旁瓣较多,地震剖面出现大量同相轴,从而影响地震解释。为了能够有效压制地震子波旁瓣,利用同态反褶积估算地震子波,基于估算子波进行俞氏子波整形处理,提高剖面的分辨率。经过仿真实验和实际资料分别验证了同态法估算子波和利用估算子波进行子波整形的可行性。

In marine geology survey, high-resolution digital single-channel survey is an important method. Single-channel seismic usually adopts single-source to produce a wavelet. Based on this way, the source-wavelet appears a lot of sidelobe, which leads to the produce of a plenty of in-phase axis, thus affect the seismic interpretation. For suppressing the wavelet＇s sidelobe effectively, the paper uses homomorphic deconvolution to estimate wavelet, and dose wavelet shaping processing to improve the vertical resolution of the seismic by usingthe statistical wavelet. The feasibility of using homomorphic deconvolution to reconstruct the seismic wavelet is proved by the simulation experiment. In the end, it is shown in practice that the statistical wavelet has brought good application effect in wavelet shaping processing.