SYSTEM AND METHOD FOR SALTSURFACE UPDATING VIA WAVEFIELD REDATUMING

摘要

A method is described for improving subsalt seismic imaging using wavefield redatuming. The method redatums the source wavefield and receiver wavefield to the salt surface. It cross-correlates the redatumed wavefields and uses the time cross-correlations to update the salt surface. The method may be executed by a computer system.

主权项

1. A computer-implemented method for subsalt seismic imaging, comprising:
a. receiving a seismic dataset representative of a subsurface volume of interest including a salt body and at least one initial subsurface model; b. redatuming a source wavefield and a receiver wavefield to a surface of the salt body to create a redatumed source wavefield and a redatumed receiver wavefield; c. cross-correlating the redatumed source wavefield and the redatumed receiver wavefield to produce a time cross-correlation window for each location on the surface of the salt body; d. analyzing time differences in the time cross-correlation window to determine errors in location of the surface of the salt body; e. updating the surface of the salt body to generate a more accurate subsurface model; and f using the more accurate subsurface model for subsalt seismic imaging.