ANÁLISIS COMPARATIVO DEL RENDIMIENTO DE CAMPAÑAS DE MÉTODOS ELECTROMAGNÉTICOS DE FUENTE CONTROLADA Y DISEÑO DE ESTUDIOS: ESTUDIO DE CASO DEL YACIMIENTO PETROLÍFERO DE MARLIM
DOI:
https://doi.org/10.56238/arev7n11-302Palabras clave:
Monitoreo de Yacimientos, Método Electromagnético, Modelado Multifísico, Campo Petrolífero de Marlim, Dominio de la FrecuenciaResumen
El método electromagnético de fuente controlada (CSEM) ha cobrado gran relevancia, principalmente para el monitoreo de yacimientos de hidrocarburos, debido a su sensibilidad en la verificación de contrastes de resistividad eléctrica y a que resulta menos dañino para la biota marina que los métodos sísmicos tradicionales. En este trabajo, se presenta un modelo multifísico del método electromagnético de fuente controlada marina (MCSEM) y del método electromagnético de fuente controlada vertical-vertical (VVCSEM), construido a partir de un modelo geológico realista del campo petrolífero Marlim, en la Cuenca de Campos, Brasil. Marlim es un campo petrolífero perteneciente al Complejo Marlim, ubicado en el margen pasivo brasileño, que presenta amplios intervalos de rocas carbonatadas intercaladas lateralmente con secuencias arenosas. La cuenca está dominada por lutitas intercaladas con areniscas turbidíticas a mayor profundidad, muy similar al paquete estratigráfico de la Cuenca Potiguar, también en Brasil. Se presenta una comparación entre las dos metodologías CSEM, así como una propuesta de diseño de prospección. Los métodos MCSEM y VVCSEM demostraron ser eficaces para detectar las respuestas del yacimiento de hidrocarburos incluso ante la presencia de una considerable capa de sal. El método VVCSEM logró una mejor respuesta de imagen en ciertas situaciones geológicas donde el método MCSEM prácticamente no detectó la presencia del yacimiento.
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