The Research on the Influence of Wavelet Phase on the Inversion Results of Reflection Coefficient Sequences by Using the ARMA Model of Symmetrical Mapping Pole-Zeros
详细信息
- 责任者：Zhang Ya’nan (College of Information and Control Engineering ; China University of Petroleum ; Dongying 257061 ; China) ; Dai Yongshou
- 刊名：Chinese Journal of Geophysics
- 出版年：2013
- 卷期：56(6)
- 关键词：地震子波 ; seismic wavelets ; 反射系数 ; reflectance coefficient
- 页码：p.2043-2054
- 图表：15 illus., 5 tables, 19 refs.
- 分类号：1600
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
摘要
In order to research the influence of seismic wavelet phase on reflection coefficient sequences inversion, the autoregressive moving average (ARMA) model was used to describe the seismic wavelet, the wavelets with the same amplitude spectrum and different phase spectrums were constructed by symmetrical mapping Pole-Zeros of ARMA model in z domain, and spectrum division was used to implement reflection coefficient sequences inversion. The theoretical analysis shows that a pure-phase filter was remained after reflection coefficient sequences inversion in the condition of inaccurate seismic wavelet phase estimation, and the phase spectrum of the pure-phase filter was the phase spectrum difference between real wavelet and constructed wavelet. The real or accurate reflection coefficient sequences were identified in inversion results by the evaluation methods of Kurtosis and Variation. Simulation and actual seismic data processing results also verified the law of the wavelet phase influence on reflection coefficient sequences inversion and the effectiveness of the evaluation methods. Research interest for enhancing the precision of reflection coefficient sequences inversion results was indicated.