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Accurate determination of seismic velocities from non-hyperbolic move-out using ray-tracingNormal access

Authors: I. J. Totterdell, R. W. Hobbs and M. R. Warner
Event name: EAGE/SEG Research Workshop 1990
Session: Estimation of Velocities (P&S) from Surface Seismic; Post-Pick Inversion; Methods and Limitations
Publication date: 15 July 1990
DOI: 10.3997/2214-4609.201411870
Organisations: SEG, EAGE
Language: English
Info: Extended abstract, PDF ( 192.42Kb )
Price: € 20

Summary:
The accurate determination of seismic velocities requires a new approach to velocity analysis. In many areas of geological interest the assumptions underlying conventional velocity analysis fail; the raypaths cannot be taken as being straight, and lateral variation of the velocity structure becomes significant. Seismic reflection datasets collected in such areas often feature moveout with offset curves which are not hyperbolae. This leads to ambiguity in the determined stacking velocities and hence in the derived interval velocities.


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