GENERACIÓN DE UN MODELO ESTRATIGRÁFICO DE ALTA RESOLUCIÓN PARA DEPÓSITOS CARBONÁTICOS TERCIARIOS DE LA CUENCA DE CAMPOS
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Universidad Industrial de Santander
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El Miembro Siri corresponde al intervalo de interés en este estudio. El mismo es de gran importancia debido al contenido de petróleo pesado presente en la plataforma carbonática desarrollada durante el Terciario. Teniendo en cuenta esta importancia se emprendió un estudio con el objetivo de generar un modelo estratigráfco de alta resolución, en secuencias de 3er orden, a partir de la interpretación de dos líneas sísmicas y el análisis de cinco perfles de pozo. El modelo propuesto permitió a su vez realizar un modelo depositacional, que facilitó el entendimiento de la evolución de la producción carbonática Terciaria en la plataforma externa al sur de la Cuenca de Campos.
El modelo propuesto sugiere el desarrollo de una plataforma aislada mixta (siliciclástico-carbonática) generada sobre altos estructurales remanentes de la fase rift, resultante del inicio de la separación de Suramérica y África. La interpretación regional y detallada de las secciones sísmicas también permitió inferir un proceso de reactivación tectónica durante la instalación de la plataforma carbonática la cual seria responsable del carácter asimétrico en la morfología de la plataforma y de los procesos locales de subsidencia diferencial simultanea con la producción de sedimento carbonático.
Palabras clave: Miembro Siri, rocas carbonáticas, estratigrafía de alta resolución, estratigrafía sísmica, modelo depositacional.
The Siri Member is of great importance due to the heavy oil content that is present on the carbonate platform developed during the Tertiary. Considering this importance, we conducted a study with the objective of generating a high resolution stratigraphic framework, on 3rd order sequences, using the interpretation of two seismic sections and the analysis of fve well logs. The proposed framework allowed for the development of a depositional model that helped on the understanding of the evolution of the carbonate production of the Tertiary on the external platform of the Campos Basin. The proposed model suggests the development of a mixed isolated platform (siliciclastic-carbonatic) generated over structural horst remaining from the rift fase, resulting from the beginning of the break up of South America and Africa. The detailed and regional interpretation of the seismic sections also allowed to infer a process of tectonic reactivation during the instal-lation of the carbonate platform. This process would have given the asymmetric character to the platform, and would have facilitated local process of simultaneous differential subsidence with the production of carbonate sediment. Key words: Siri Member, carbonatics rocks, hight resolution stratigraphy, seismic stratigraphy, depositional model.
The Siri Member is of great importance due to the heavy oil content that is present on the carbonate platform developed during the Tertiary. Considering this importance, we conducted a study with the objective of generating a high resolution stratigraphic framework, on 3rd order sequences, using the interpretation of two seismic sections and the analysis of fve well logs. The proposed framework allowed for the development of a depositional model that helped on the understanding of the evolution of the carbonate production of the Tertiary on the external platform of the Campos Basin. The proposed model suggests the development of a mixed isolated platform (siliciclastic-carbonatic) generated over structural horst remaining from the rift fase, resulting from the beginning of the break up of South America and Africa. The detailed and regional interpretation of the seismic sections also allowed to infer a process of tectonic reactivation during the instal-lation of the carbonate platform. This process would have given the asymmetric character to the platform, and would have facilitated local process of simultaneous differential subsidence with the production of carbonate sediment. Key words: Siri Member, carbonatics rocks, hight resolution stratigraphy, seismic stratigraphy, depositional model.