Teleseismic shot-profile migration
نویسندگان
چکیده
منابع مشابه
Automatic Velocity Analysis via Shot Profile Migration
Shot profile migration provides a convenient framework for implementation of a differential semblance algorithm for estimation of complex, strongly refracting velocity fields. The objective function minimized in this algorithm may measure either focussing of the image in offset or flatness of the image in (scattering) angle. Velocity estimation based on this measure of data-model consistency us...
متن کاملShot-profile migration of multiple reflections
A shot-profile migration algorithm is modified to image multiple reflections at their correct location in the subsurface. This method replaces the impulsive source with an areal source made of recorded primaries and multiples. In addition, the extrapolated wavefield at the receivers consists of recorded multiples only which have been previously separated from the primaries. Migration results wi...
متن کاملDifferential semblance velocity analysis via shot profile migration
Shot profile migration provides a convenient framework for implementation of a differential semblance algorithm for estimation of complex, strongly refracting velocity fields. The objective function minimized in this algorithm may measure either focussing of the image in offset or flatness of the image in (scattering) angle. The gradient of this objective is a by-product of a depth marching sch...
متن کاملTeleseismic migration with dual bootstrap stack
S U M M A R Y A recently developed stacking scheme called dual bootstrap stack (DBS) is applied to teleseismic migration, using deep earthquakes in South America as sources and USArray as receivers. Built with statistical tests for signal significance and coherence, DBS can achieve a clean separation of signal and noise, and unlike conventional non-linear stacks such as Nth-root stack (NRS) and...
متن کاملShort Note Equivalence of source-receiver migration and shot-profile migration
At first glance, shot profile migration and source-receiver (survey-sinking) migration seem to be substantially different algorithms. The basic principles used by the two schemes are different. Shot profile migration is performed by independently propagating the source wavefield and the receiver wavefield. The image is obtained by cross-correlating (possibly normalized by the amplitude of the s...
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ژورنال
عنوان ژورنال: GEOPHYSICS
سال: 2006
ISSN: 0016-8033,1942-2156
DOI: 10.1190/1.2208263