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Abstract

Differential semblance velocity analysis (“DSVA”, (Symes, 1986)) estimates velocity models<br>from waveform data, by means of prestack migration and its linearized adjoint state process.<br>Several authors have presented DSVA in its explicit differential forms for laterally<br>heterogeneous velocity models using various methods of prestack migration (Symes and<br>Versteeg, 1993; Kern and Symes, 1994; Chauris and Nobel, 2001;Mulder and ten Kroode,<br>2002). Shen et al. (2003) presented a version DSVA based on an objective of focusing the<br>image in subsurface offset. In this approach the wrong velocity is penalized by simply<br>multiplication of subsurface offset to the image volume. The name of “differential<br>semblance” is justified through its subsurface angle substitute (Shen, 2004), where an explicit<br>differential with respect to angle is formulated.

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/content/papers/10.3997/2214-4609.201405065
2008-06-09
2020-11-26
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