1887

Abstract

There are two basic categories of 3-D time migration from the implementation point of view: one-pass and two-pass 3-D migration. Two-pass 3-D migration, whereby individual lines are migrated in one direction, sorted, and then migrated in the orthogonal direction, is generally preferred over one-pass 3-D migration because of its efficiency and convenience of implementation. A disadvantage of the conventional two-pass approach, however, is its failure to accurately image reflections dipping beyond 40 to 45 degrees for all azimuths in media with typical vertical velocity variations. So a common understanding has been that an exact 3-D migration might be accomplished only by one-pass methods, even though they are much more expensive .

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/content/papers/10.3997/2214-4609.201410557
1992-06-01
2020-11-24
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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201410557
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