Detection of brine plumes in an oil reservoir using the geoelectric method

During water injection in a reservoir at the secondary recovery phase, oil is replaced by salt water, producing different saturation zones in the formation containing this reservoir. This process could be optimized if the direction of the fluids is monitored. Since there are large contrasts in the e...

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Autores principales:	Bongiovanni, María Victoria Flavia, Osella, Ana María, de la Vega, Matías
Publicado:	2013
Materias:	brine plumes geoelectric numerical modelling oil recovery brine electrical conductivity electrical method electrode geoelectric field hydrocarbon reservoir numerical model
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17422132_v10_n4_p_Bongiovanni http://hdl.handle.net/20.500.12110/paper_17422132_v10_n4_p_Bongiovanni
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_17422132_v10_n4_p_Bongiovanni
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spelling	paper:paper_17422132_v10_n4_p_Bongiovanni2023-06-08T16:27:00Z Detection of brine plumes in an oil reservoir using the geoelectric method Bongiovanni, María Victoria Flavia Osella, Ana María de la Vega, Matías brine plumes geoelectric numerical modelling oil recovery brine electrical conductivity electrical method electrode geoelectric field hydrocarbon reservoir numerical model During water injection in a reservoir at the secondary recovery phase, oil is replaced by salt water, producing different saturation zones in the formation containing this reservoir. This process could be optimized if the direction of the fluids is monitored. Since there are large contrasts in the electric conductivity between salt water and oil, geoelectrical methods could provide a water saturation map at any given moment of the production. The case we study here corresponds to a rather shallow reservoir (between 500 and 600 m in depth). As the wells are in production, electrodes for borehole measurements cannot be introduced. Hence, our objectives are to determine the possibilities of detecting the channelling direction of saline water between injection and producing wells, and applying the method of placing electrodes on the surface or even burying them, but at depths corresponding to shallow layers. We design an electrical model of the reservoir and then numerically simulate the geoelectrical response in order to determine the conditions under which the anomaly, i.e. the accumulation of brine in a reduced area, can be detected. We find that the channelling of the brine can be detected for the reservoir studied here if the electrodes are placed at 180 m depth. The Wenner configuration using 16 electrodes provides the best resolution. Therefore, monitoring the voltage at a number of electrodes embedded at rather shallow depths (from a technical-logistic point of view) could give information about the direction of the saline channelling even if a quantitative image of the subsoil cannot be obtained due to the reduced number of electrodes used in the study. © 2013 Sinopec Geophysical Research Institute. Fil:Bongiovanni, M.V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Osella, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:De La Vega, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17422132_v10_n4_p_Bongiovanni http://hdl.handle.net/20.500.12110/paper_17422132_v10_n4_p_Bongiovanni
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	brine plumes geoelectric numerical modelling oil recovery brine electrical conductivity electrical method electrode geoelectric field hydrocarbon reservoir numerical model
spellingShingle	brine plumes geoelectric numerical modelling oil recovery brine electrical conductivity electrical method electrode geoelectric field hydrocarbon reservoir numerical model Bongiovanni, María Victoria Flavia Osella, Ana María de la Vega, Matías Detection of brine plumes in an oil reservoir using the geoelectric method
topic_facet	brine plumes geoelectric numerical modelling oil recovery brine electrical conductivity electrical method electrode geoelectric field hydrocarbon reservoir numerical model
description	During water injection in a reservoir at the secondary recovery phase, oil is replaced by salt water, producing different saturation zones in the formation containing this reservoir. This process could be optimized if the direction of the fluids is monitored. Since there are large contrasts in the electric conductivity between salt water and oil, geoelectrical methods could provide a water saturation map at any given moment of the production. The case we study here corresponds to a rather shallow reservoir (between 500 and 600 m in depth). As the wells are in production, electrodes for borehole measurements cannot be introduced. Hence, our objectives are to determine the possibilities of detecting the channelling direction of saline water between injection and producing wells, and applying the method of placing electrodes on the surface or even burying them, but at depths corresponding to shallow layers. We design an electrical model of the reservoir and then numerically simulate the geoelectrical response in order to determine the conditions under which the anomaly, i.e. the accumulation of brine in a reduced area, can be detected. We find that the channelling of the brine can be detected for the reservoir studied here if the electrodes are placed at 180 m depth. The Wenner configuration using 16 electrodes provides the best resolution. Therefore, monitoring the voltage at a number of electrodes embedded at rather shallow depths (from a technical-logistic point of view) could give information about the direction of the saline channelling even if a quantitative image of the subsoil cannot be obtained due to the reduced number of electrodes used in the study. © 2013 Sinopec Geophysical Research Institute.
author	Bongiovanni, María Victoria Flavia Osella, Ana María de la Vega, Matías
author_facet	Bongiovanni, María Victoria Flavia Osella, Ana María de la Vega, Matías
author_sort	Bongiovanni, María Victoria Flavia
title	Detection of brine plumes in an oil reservoir using the geoelectric method
title_short	Detection of brine plumes in an oil reservoir using the geoelectric method
title_full	Detection of brine plumes in an oil reservoir using the geoelectric method
title_fullStr	Detection of brine plumes in an oil reservoir using the geoelectric method
title_full_unstemmed	Detection of brine plumes in an oil reservoir using the geoelectric method
title_sort	detection of brine plumes in an oil reservoir using the geoelectric method
publishDate	2013
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17422132_v10_n4_p_Bongiovanni http://hdl.handle.net/20.500.12110/paper_17422132_v10_n4_p_Bongiovanni
work_keys_str_mv	AT bongiovannimariavictoriaflavia detectionofbrineplumesinanoilreservoirusingthegeoelectricmethod AT osellaanamaria detectionofbrineplumesinanoilreservoirusingthegeoelectricmethod AT delavegamatias detectionofbrineplumesinanoilreservoirusingthegeoelectricmethod
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Detection of brine plumes in an oil reservoir using the geoelectric method

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