Simulating propagation of decoupled elastic waves using low-rank approximate mixed-domain integral operators for anisotropic media |

Figure 7 shows synthetic vector displacement fields using the proposed approach for a 3-D two-layer model, with a horizontal reflector at 1.167 km. The first layer is a VTI medium with , , , , and , and the second is an orthorhombic medium representing a vertically fratcured TI formation (Tsvankin, 2001; Schoenberg and Helbig, 1997), which has the parameters , , , , , , , and . A exploration source is located at the center of the model. We achieve efficient simulation of dispersion-free 3D elastic wave propagation for the decoupled and total displacement fields. Shear wave splitting can be observed in the qS-wave fields.

ElasticPx,ElasticSx,Elasticx,ElasticPy,ElasticSy,Elasticy,ElasticPz,ElasticSz,Elasticz
Synthesized decomposed and total elastic wavefields for a orthorhombic model with a VTI overburden:
qP (left), qS (mid) and total (right) elastic displacement fields (top: x-component, mid: y-component, bottom: z-component).
Figure 7. |
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Simulating propagation of decoupled elastic waves using low-rank approximate mixed-domain integral operators for anisotropic media |

2016-11-21