| 摘要 |
A method 500 of seismic data processing includes improving the continuity of the primary events in an original seismic dataset, previously rendered discontinuous by anomalies related to changes in the subsurface over the acquisition time of the survey, to create a continuous seismic dataset 510. This primary correction may correct for tidal statics, water velocity correction or elevation statics. At least the first order multiples of the original seismic dataset are predicted from the continuous seismic dataset 520. The predicted multiples and one of the original seismic dataset or the continuous seismic dataset are deterministically matched 530 and a difference data set is formed 540. This involves applying corrections derived from the primary correction (e.g. the inverse of the primary correction) to one or both of the datasets being matched. Also disclosed is a method of processing seismic data which comprises determining a primary correction for a given type of static anomaly and deriving a multiple correction from the same information used to derive the primary correction. The data upon which the method operates may be acquired in either a land or marine survey and may be two-dimensional, three-dimensional, or four-dimensional. |
