Detailed Surface Multiple Prediction Using Split-spread Broadband Seismic Marine Data in a Complex Sea Floor Environment
| Autor: | R. Soubaras, G. Henin, V. Danielsen, J. Deprey, J.E. Lie, R. Sablon, M. Chambefort, A. Pica, E. Dhelie, S. Le Roy |
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| Přispěvatelé: | Compagnie Générale de Géophysique (CGG), Matrices Aliments Procédés Propriétés Structure - Sensoriel (GEPEA-MAPS2), Laboratoire de génie des procédés - environnement - agroalimentaire (GEPEA), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Centre National de la Recherche Scientifique (CNRS)-Ecole Polytechnique de l'Université de Nantes (EPUN), Université de Nantes (UN)-Université de Nantes (UN)-Institut Universitaire de Technologie - Nantes (IUT Nantes), Université de Nantes (UN)-Institut Universitaire de Technologie Saint-Nazaire (IUT Saint-Nazaire), Université de Nantes (UN)-Institut Universitaire de Technologie - La Roche-sur-Yon (IUT La Roche-sur-Yon), Université de Nantes (UN)-Ecole Nationale Vétérinaire, Agroalimentaire et de l'alimentation Nantes-Atlantique (ONIRIS)-Université Bretagne Loire (UBL)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Ecole Nationale Vétérinaire, Agroalimentaire et de l'alimentation Nantes-Atlantique (ONIRIS)-Université Bretagne Loire (UBL) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | 80th EAGE Conference and Exhibition 2018 80th EAGE Conference and Exhibition 2018, Jun 2018, Copenhagen, France |
| Popis: | Summary Seismic data for hydrocarbon exploration in the Barents Sea can be difficult to interpret because of severe contamination of the sections by residual diffracted multiples. These multiples mainly result from significant scars of the sea floor produced by paleo-iceberg drifts during glacial ages. To mitigate this problem, a new marine seismic design has been developed to acquire broadband, split-spread shot gathers with significantly improved sampling of the near offsets. This design allows for improved subsurface illumination which provides sharp and detailed imaging of subsurface reflectors, including the sea floor. To optimize the demultiple in this new data, we used several multiple models in simultaneous adaption procedures, including 3D SRME models, but also 3D wave-equation based multiple modeling to fully benefit from the available rich subsurface reflectivity representation. Along with this, an innovative and specific implementation of wave equation modelling enabled the construction of diffracted multiples “only” models. These separated models were fed into a multi-model adaptive subtraction using AVO-driven primary models as a constraint to preserve primary information (especially low frequencies). The ensemble lead to improved demultiple results. |
| Databáze: | OpenAIRE |
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