| 摘要 |
A method for migrating seismic data in the frequency-wave number domain is provided for migrating the seismic data having large vertical and lateral velocity variations in a fast, efficient and accurate manner. A root-mean-square (RMS) velocity function is derived from a set of seismic data samples comprising a body of seismic data. A best fit migration velocity is determined from the seismic data so as to provide a best migration. The seismic data may then be partitioned into a series of discreet frames and stretched according to a predetermined algorithm. Each partition is migrated in series by a portion of the RMS Velocity function until the data are fully migrated. After migration, the migrated seismic data are inversely stretched vertically followed by an inverse lateral stretch to remove any distortion instilled in the data by the initial data stretching.
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