Amplitude variation with offset inversion using the reflectivity method

• DOI: 10.1190/geo2015-0332.1
• Publication Date: 2016-06-02T11:59:48Z
• Authors: Hongxing Liu; Jingye Li; Xiaohong Chen; Bo Hou; Li Chen
• Keywords: Seismogram; Amplitude versus offset; Inverse transform sampling; Synthetic data; Multiple

Most existing amplitude variation with offset (AVO) inversion methods are based on the Zoeppritz’s equation or its approximations. These assume that of seismic data depends only reflection coefficients, which means wave-propagation effects, such as geometric spreading, attenuation, transmission loss, and multiples, have been fully corrected attenuated before inversion. However, these requirements very strict can hardly be satisfied. Under a 1D assumption, reflectivity-method-based inversions able to handle losses internal multiples. Applications inversions, however, still time-consuming complex in computation differential seismograms. We evaluated an methodology vectorized reflectivity method, seismograms calculated from analytical expressions. It is computationally efficient. A modification implemented transform intercept time ray-parameter domain angle-gather domain. AVO always ill-posed problem. Following Bayesian approach, stabilized by including correlation P-wave velocity, S-wave density. Comparing Zoeppritz-based synthetic real set, we concluded more accurate when propagation effects multiples not corrected. Model testing has revealed method robust at high noise levels.