Automatic methods used in conventional seismic data processing to make statics corrections work well with short-wavelength anomalies but regularly fail to resolve mid-wavelength near-surface anomalies. Calculation of correct static time delays caused by near-surface heterogeneities is especially difficult when the heterogeneities extend from half of a spread length to 2–3 times the source-receiver offset.

In this case, obtaining information about surface conditions, the near surface, and the shape of reflectors should be done prior to making static corrections because it is necessary to eliminate any uncertainty regarding those portions of the data that need to be processed with static corrections...

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