Common offset depth migration with residual moveout correction

Details Common offset depth migration with residual moveout correction Common offset depth migration with residual moveout correction

1989-11-30

1990-12-25

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-reflection type

367 50, G01V 136

Patent

active

049808664

ABSTRACT:
In applying residual movement correction to common offset depth migrated data, common offset depth migration is applied using the best available velocity/depth model. Post migrated parts, which are depth migrated common midpoint gathers, are saved. The post migrated parts are treated as if they were in time not depth. Normal movement based on a constant velocity is removed. Velocity functions time-velocity pairs, are derived for the post migrated parts with normal movement removed using a standard velocity analysis program. Normal moveout based on these velocity functions is applied. The events on the post migrated parts ae not imaged to the same depth. The corrected post migrated parts are then stacked and displayed.

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Etgen, John T.; "Interval Velocity Estimation Using Prestack Depth Migration (B-10)", May 29-Jun. 2, 1989, Geophysics Dept., Stanford University, pp. 55.
Etgen, John T., "Velocity Analysis Using Prestack Depth Migration: Linear Theory"; Oct. 30-Nov. 3, 1988; Stanford University; Exp. Abs. with Biog., 1988 Technical Program, vol. 2, S9.7, pp. 909-912.
Etgen, John T., "Velocity Analysis Using Prestack Depth Migration: Applying the Linear Theory"; Rept. No. 60, May 1989, pp. 25-40; Stanford Exp. Proj.; Bd. of Trustees, Leland Stanford Junior Univ.

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