A NEW DOUBLE DECONVOLUTION METHOD SUITABLE FOR NON-STATIONARY SEISMOGRAMS IN THE TIME-FREQUENCY DOMAIN

作者：Wang, Rong-Rong^*; Dai, Yong-Shou; Li, Chuang; Zhang, Peng; Tan, Yong-Cheng

来源：Journal of Seismic Exploration, 2015, 24(5): 401-417.

• double deconvolution method
• non-stationary seismogram
• time-varying wavelet
• quadratic spectral modeling

Conventional deconvolution methods are based on the assumption that the seismogram is stationary; however, actual seismic data cannot satisfy the above assumption. Thus, this paper proposes a double deconvolution method in the time-frequency domain to improve the resolution of the non-stationary seismogram. First, the quadratic spectrum modeling method, in combination with the bispectrum method based on higher-order cumulants, was used to extract a wavelet from the non-stationary seismogram, and the spectrum division method was applied to the entire seismogram to perform deconvolution. Then, time-varying wavelets were extracted from the first deconvolution result in the time-frequency domain, and the residual wavelets on every point spectrum were eliminated from the seismogram by a second deconvolution. Simulation experiments and field data processing demonstrated that the proposed method overcomes the interference of adjacent strata effectively and greatly improves the resolution of the non-stationary seismogram.

• 出版日期2015-11
• 单位中国石油大学（华东）