reflected waves between observation surface and datum surface are vertical in spite of source-receiver offset. But the assumption about vertical ray paths is relatively exact only in interval limited by observation surface and low-velocity zone bottom. That’s why it’s desirable to set datum surface as close to low-velocity zone bottom as possible, because otherwise NMO of the reflectors would be distorted. The best way is to identify low-velocity zone bottom and datum surface and to use more proper methods for wave field redatuming. But if the datum surface isn’t flat the hodograph of the reflected waves would have very difficult form, that distinct from hyperbola drastically. So, conventional methods based on assumption of hyperbolical form of hodographs aren’t applicable. In this paper we suggest a new method for statics correction based on kinematic-dynamic transformation developed in Seismotech, LLC.


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