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Serious stretch appears in shallow long offset signals after NMO correction. In this article we study the generation mechanism of NMO stretch, demonstrate that the conventional travel time equation cannot accurately describe the travel time of the samples within the same reflection wavelet. As a result, conventional NMO inversion based on the travel time of the wavelet’s central point occurs with...
The P-SV wave reflection coefficients in VTI and HTI media were obtained by approximation of the Jilek (2002a and b) equation in orthotropic anisotropic media. An approximate equation for P-SV wave elastic impedance can be derived from the combination of the new coefficients with S-wave elastic impedance (Duffaut et al., 2000). On this basis, the fluid identification factor in weakly anisotropic media...
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