Multi-solid model modified to predict paraffin precipitation in petroleum fluids at high temperatures and pressures
Resumen
En el presente trabajo se ha modificado una estructura termodinámica para el cálculo del punto de nube, de fluidez y cantidad de cera precipitada en un amplio rango de condiciones de temperatura, composición y altas presiones. El modelo se fundamenta en una combinación de los conceptos de
solución ideal, caracterización del fluido y de formación de fases sólidas múltiples empleando ecuaciones de estado cúbicas (EDEC). Los datos experimentales usados para probar la capacidad de predicción del modelo y su potencialidad tienen características variadas: sistemas sintéticos de series continúas de alcanos pesados, series discontinuas y fluidos del petróleo vivo y muerto con fracciones indefinidas como C7+, C10+, C20+, y C30+. Las muestras se tomaron de la literatura, fluidos de petróleos de los principales yacimientos Colombianos y algunas muestras de fluidos Bolivianos. Los resultados que se presentan en este trabajo muestran desviaciones mínimas entre los datos experimentales y los calculados con el modelo. Lo anterior permite por tanto, un avance en la toma de decisiones para aseguramiento del flujo en yacimiento, pozos y facilidades de superficie en la industria petrolera.
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