| 摘要 |
<p>A seismic processing method of the migration type, comprising the steps of : " linearly combining downgoing waves generated at a plurality of shotpoints, and also upgoing waves recorded by a plurality of seismic sensors; " notionally propagating the composite waves as obtained in this way in order to obtain migrated downgoing and upgoing waves for different depths; and " determining at a plurality of depths at least one characteristic of the subsoil as a function of the upgoing and downgoing waves propagated in this way; the downgoing (resp. upgoing) composite waves being calculated by a linear combination of downgoing (resp. upgoing) waves in which said downgoing (resp. upgoing) waves are weighted by the coefficients of a spatial modulation matrix which is a function of the positions of the shotpoints.</p> |
