The Structural Evolution of the Norne Field using 3D pre-stack time migration (PSTM) Interpretation.
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In the present project has been used a 3D seismic dataset from Norne field in the Norwegian Sea, in order to have a clearer understanding of the regional geology by describing the structural evolution and mapping the main features. It is mainly based in visualization, description and interpretation of structural features within the field by generating surface, isochrones and attributes maps confirmed through seismic sections. For that, the interpretation was done by dividing the study sequence into three stratigraphic Units bounded by interpreted horizons. In order to conduct the study, the generated maps helped the analyses of the structural evolution reveal four distinct structures such as horst, grabens, anticlines and synclines are well identified. These structures are formed due to presence of salt below the Units and the tectonic events occurred in these period. The structural evolution starts from the base to the top of each investigated Unit. The Unit I is affected by tectonics event acting in syn rift episode as whereas is made the investigation and starts the structural evolution. The Unit II is also affected by tectonics event and highly faulted horst blocks and grabens structures are remaining in this Unit by the active tectonic events coming from Unit I. The Unit III is not affected by tectonic activities; this unit is deposited in a period of quiet or non-tectonism which is assumed to be seen in Post- rift episode. The structural development of structures here investigated with their shape/topography configuration and orientation, gives idea that the Norne Field has been affected by tectonics activities, salt movement and gravity sliding of sediments. Keywords: 3D Seismic data, Norne field, visualization, description, interpretation, structural features.