Abstract
Prestack migration is an efficient tool for imaging reflectors especially in complex tectonic areas where other technics (such as post-stack migration or DMO) fail. Prestack migration of common shot gathers is a very convenient method for an interactive implementation since it can be performed for each common shot gather separately. Prestack depth migration requires good velocity field information. This information can be obtained by different kinematic technics. Inversion by coherency optimization, which consists in automatic maximization of the semblance function on prestack trace gathers, has the advantage of not requiring any prestack travel-time picking. In this work we combine these two methods in an iterative way where the migration process is used for the estimation of interface positions while coherency inversion is used for updating the velocity field. We implemented this idea in an interactive format on a supercomputer. The efficiency of this structural inversion process is demonstrated on both synthetic and real data.
| Original language | English |
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| Pages | 427-430 |
| Number of pages | 4 |
| State | Published - 1998 |
| Externally published | Yes |
| Event | 1988 Society of Exploration Geophysicists Annual Meeting, SEG 1988 - Anaheim, United States Duration: 30 Oct 1988 → 3 Nov 1988 |
Conference
| Conference | 1988 Society of Exploration Geophysicists Annual Meeting, SEG 1988 |
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| Country/Territory | United States |
| City | Anaheim |
| Period | 30/10/88 → 3/11/88 |