ResumenEl modelo predictivo utiliza el método Dake-Welge para un reservorio homogéneo de estrato simple considerando flujo segregado y flujo difuso. El módulo forma parte de un proyecto para construir un software dedicado al análisis de tecnologías de recuperación secundaria de petróleos. El desarrollo del modelo se realizó en tres etapas: la primera, consistió en la revisión bibliográfica en el tema de inyección de agua; en la segunda, se creó un libro Excel con los fundamentos teóricos, y en la etapa final, se realizó una comparación de resultados generados en Excel con el software WaterDrive. Los resultados obtenidos en el flujo tipo segregado empleando el modelo predictivo fueron similares a los generados en el software WaterDrive. Los resultados obtenidos en el flujo tipo difuso tuvieron un error máximo del 1,2 por ciento para el tiempo de ruptura. Estos resultados llevan a concluir que el modelo predictivo es robusto y estaría listo para probarse en un proyecto piloto. La decisión de desarrollar el modelo usando Excel, permite que pueda ser escrita empleando cualquier lenguaje de programación. Los resultados positivos obtenidos con esta metodología dan confianza en que se puede replicar software comerciales desarrolladas en universidades ecuatorianas.Palabras clave: recuperación secundaria de petróleo; Inyección de agua; método Dake-Welge; flujo segregado; flujo difuso; excel Abstract This predictive model uses the Dake-Welge method for a homogeneous reservoir of a single layer taking into account the segregated flow and the diffusive flow patterns. This module is part of a project to build an analysis software for technologies of secondary oil recovery.The development of the model was done in three stages: The first s tage consisted i n l iterature r eview mainly o f specialized b ooks of w aterflooding. Th e second stage comprised the creation of an Excel workbook with the theoretical fundamentals. Finally, during the third stage there was a validation of the methodology by comparing the results of the Excel workbook with the commercial software WaterDrive owned.The results obtained in the segregated flow pattern of the model matched the outcomes of the software WaterDrive. The results obtained in the diffuse flow pattern had a maximum error of 1.28 per cent in the breakthrough time. These results probe that the model is robust and it would be ready to test in a pilot project.The decision of developing a methodology using Excel allows the writing of it using any programming language. The positive records obtained from this model give confidence that Ecuadorian universities can replicate commercial software at very low costs.
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