| 摘要 |
PCT No. PCT/FR97/00629 Sec. 371 Date Mar. 17, 1998 Sec. 102(e) Date Mar. 17, 1998 PCT Filed Apr. 9, 1997 PCT Pub. No. WO97/40406 PCT Pub. Date Oct. 30, 1997A method for the determination of migration velocities in seismic processing in which a blasting point S is associated with receivers (R1 to Rn) which are separated by offsets such that in a given speed range, a first set of traces derived from the blasting point and registered on the receivers, and a second set of traces in constant and colinear offset to the first set are migrated. Two migrated images of the part of the site corresponding to the two sets of traces are obtained. The two images are correlated by means of a spatial two-dimensional correlation, the result thereof determining the deviation between the migration used and the investigated velocity. The result is particularly useful in the seismic prospection of a site. |
