| Autor: |
João Batista Boechat, Túlio do Valle Moreira, Paulo E. M. Cunha, Webe João Mansur, André Bulcão, Djalma Manoel Soares Filho |
| Rok vydání: |
2007 |
| Předmět: |
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| Zdroj: |
SEG Technical Program Expanded Abstracts 2007. |
| Popis: |
This work introduces a reverse time migration formulation specially designed for offshore data acquired with a single boat pulling one or two air-guns and some streamers of receivers. 3D depth migrations are performed using the concept of areal shot record, as introduced by Berkhout in 1992. In the proposed scheme, an areal shot record is computed through the sum of convolutions between the seismograms registered along a sail line and a synthesis operator, which is designed to form a specific wave front just above the target zone (controlled illumination). All extrapolations are performed solving the acoustic two-way wave equation without smooth the macro-velocity field. The method is illustrated with an application on the SEGEAGE Overthrust model. Except for some small artifacts, less than forty areal shot records were enough to image the main interfaces. The execution time was considerably less than that required to reserve time migrate all seismograms independently. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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