Loading...
Please wait, while we are loading the content...
Similar Documents
Nonhyperbolic moveout inversion of qP-waves in layered VTI media using rational interpolation
| Content Provider | Semantic Scholar |
|---|---|
| Author | Douma, Huub Baan, Mirko Van Der |
| Abstract | The nonhyperbolic moveout observed in common-midpoint gathers is often ascribed to the presence of seismic anisotropy in the subsurface. Therefore, this moveout is commonly used to get (initial) estimates of the relevant seismic parameters describing such anisotropy. For qP-waves in laterally homogeneous transversely isotropic media with a vertical symmetry axis (VTI), these parameters are the anellipticity parameter η and the zero-dip normal moveout velocity Vnmo. The τ -p domain is the natural domain for parameter estimation in horizontally layered media since cusps do not occur in this domain and because the horizontal slowness is preserved upon propagation. However, the need for methods that use the τ -p domain to transform the data or to pick traveltimes in the x-t domain, is a practical disadvantage. To overcome this, we combine a τ -p domain inversion technique with rational interpolation of traveltimes in the x-t domain. This combination results in a highly accurate, yet efficient semblance-based method in the x-t domain, for estimating the interval values of η and Vnmo from the moveout of qP-waves reflected once in a horizontally layered VTI medium. The efficiency of the method stems from the fact that rational interpolation needs only few (here five) support points to obtain accurate moveout interpolation. The accuracy of the method is verified with a numerical example. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://cwp.mines.edu/Documents/cwpreports/cwp527.pdf |
| Alternate Webpage(s) | http://www.cwp.mines.edu/Meetings/Project06/cwp527.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
