Análise estratigráfica de alta resolução aplicada aos reservatórios da seção pós-sal da Bacia de Campos: um estudo de caso no Campo de Marlim

• Autor(a) principal: Adriano, Manuela da Silva
• Data de Publicação: 2017
• Outros Autores: [e-mail]
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/19804
• topic: Geomorfologia Sísmica; Turbiditos; Estratigrafia de Alta Resolução; Seismic Geomorphology; Turbidite; High Resolution Stratigraphy; CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::GEOLOGIA

The Marlim Oil Field, located in the northeast region of the Campos Basin, is considered the largest oil accumulation found in Brazilian territory, in the post-salt section. Its reservoir consists in a series of amalgamated, unconfined turbidite lobes, resulting in a vast, relatively homogeneous, massive sandy body, as a result of successive sediment flows. In this work, a new methodology was applied to locate, identify, characterize and analyze depositional features resulted from the processes that acted in the formation of these sandy bodies. To do this, a sweep was performed along the slices of the 3D seismic cube, using the amplitude seismic attribute in the search for patterns that could be associated to some type of depositional feature. After the localization of two channel-like depositional features, they were confirmed through seismic sections and from the interpretation of the corresponding reflectors. Then, the amplitude map confection was performed from the surface of the interpreted features, as well as from the previously mapped surface as the top of the depositional sequence. These maps have highlighted the identified channeled features clearly. However, in the map obtained from the top of the surface of the depositional sequence, other features in the area, such as deconfining deposits, could be identified under the turbidite body. This methodology of interpretation and analysis of the data allowed to locate, identify and map depositional features in which were feeder channels of the turbiditic bodies that compose the reservoir of the Marlim Field.