%0 Journal Article %T 3D Seismic Constraint Definition in Deep-Offshore Turbidite Reservoir %+ IFP Energies nouvelles (IFPEN) %+ Total E&P %A Nivlet, P. %A Lefeuvre, F. %A Piazza, J. L. %< avec comité de lecture %@ 1294-4475 %J Oil & Gas Science and Technology - Revue d'IFP Energies nouvelles %I Institut Français du Pétrole (IFP) %V 62 %N 2 %P 249-264 %8 2007-03 %D 2007 %R 10.2516/ogst:2007021 %Z Physics [physics]Journal articles %X Girassol is a turbidite field located in deep offshore Angola. This field is particularly challenging in terms of reservoir characterization due to the high complexity of reservoir geology (channel-levees complexeseroding themselves partially). However, by integrating properly the high resolution 3D pre-stack seismic with well data, seismic velocities, stratigraphy and structural information, extraction of a quantitative3D high resolution geological information becomes possible. The proposed workflow is divided into three parts: – pre-stack stratigraphic inversion, to estimate 3D acoustic and shear impedance model explaining optimally available seismic data:probabilistic seismic facies analysis from the inversion results based on a discriminant analysis technique; – geological facies proportions computation from the previous step results by a novel approach developed to account for scale differences between seismic facies and detailed geological facies, in orderto extract information at the geological scale, and infer the small heterogeneities. As a result, we obtain a set of 3D geological facies average proportion volumes, which can be used in, a further step to better constrain geological modelling. %G English %2 https://ifp.hal.science/hal-02005645/document %2 https://ifp.hal.science/hal-02005645/file/ogst07008.pdf %L hal-02005645 %U https://ifp.hal.science/hal-02005645 %~ IFP %~ OGST