Towards understanding long offset moveout correction

John C. Bancroft

ABSTRACT

The behavior of data with long offset moveout correction can appear to be quite bizarre. This behavior is typically muted out when stacking CMP gathers. However, when using Kirchhoff migrations, it may not be evident and therefore included in the migration. I investigate the behavior of moveout, and moveout correction, for long offsets to understand the apparent movement of energy, especially in the presence of vertically varying velocities.

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