Simulating propagation of separated wave modes in general anisotropic media, Part I: qP-wave propagators |

This example demonstrates the approach on a two-layer TI model, in which the first layer is a very strong VTI medium with , , , and , and the second layer is a TTI medium with , , , , and . The horizontal interface between the two layers is positioned at a depth of 1.167 km. Figure 6a and 6d display the horizontal and vertical components of the displacement wavefields at 0.3 s. Using the pseudo-pure-mode qP-wave equation, we simulate equivalent wavefields on the same model. Figure 6b and 6e display the two components of the pseudo-pure-mode qP-wave fields at the same time step. Figure 6c and 6f display pseudo-pure-mode scalar qP-wave fields and separated qP-wave fields respectively. Obviously, residual qSV-waves (including transmmited, reflected and converted qSV-waves) are effectively removed, and all transmitted, reflected as well as converted qP-waves are accurately separated after the projection deviation correction.

ElasticxInterf,PseudoPurePxInterf,PseudoPurePInterf,ElasticzInterf,PseudoPurePzInterf,PseudoPureSepPInterf
Synthesized wavefields on a two-layer TI model with strong anisotropy in the first layer and
a tilted symmetry axis in the second layer: (a) x- and
(d) z-components synthesized by original elastic wave equation; (b) x- and
(e) z-components synthesized by pseudo-pure-mode qP-wave equation;
(c) pseudo-pure-mode scalar qP-wave fields; (f) separated scalar qP-wave fields.
Figure 6. |
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Simulating propagation of separated wave modes in general anisotropic media, Part I: qP-wave propagators |

2014-06-24