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Flujo de dos fases regulado de humedad de CO2 supercrítico y agua en nanocanales confinados

Kang Zhang¹, Yangwen Zhu², Jun Xia¹

¹Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang 212013, China.

ACS applied materials & interfaces

|August 28, 2025

Resumen

El transporte de dióxido de carbono supercrítico (scCO2) se ve obstaculizado por el agua en los nanocanales hidrofílicos, pero mejorado en los hidrofóbicos. La comprensión de estas interacciones es clave para optimizar los procesos de recuperación mejorada de petróleo (EOR).

Área de la Ciencia:

Ingeniería del petróleo
Ciencias de los materiales
Ingeniería Química

Sus antecedentes:

El dióxido de carbono supercrítico (scCO2) es un agente clave para la recuperación mejorada del petróleo (EOR).
Comprender el scCO2 y el flujo de agua en los canales de depósito a nanoescala es crucial, pero se entiende mal.
La saturación de agua y la humedabilidad del canal influyen significativamente en el transporte de scCO2.

Objetivo del estudio:

Para investigar el flujo de dos fases de scCO2 y agua en nanocanales.
Determinar el impacto de la saturación de agua y la humedezabilidad del canal en el transporte de scCO2.
Desarrollar modelos analíticos para predecir el comportamiento del flujo de scCO2-agua.

Principales métodos:

Simulaciones de dinámica molecular.
Modelado analítico.
Análisis del flujo de dos fases de scCO2-agua en nanocanales confinados.

Principales resultados:

Canales hidrofílicos: Las capas y puentes de agua impiden el flujo de scCO2 hasta en un 95%.
Canales hidrofóbicos: el agrupamiento de agua mejora la movilidad del scCO2.
Los patrones de flujo cambian de flujo de Poiseuille a Couette con el aumento de la saturación de agua.

Conclusiones:

La humedabilidad del canal y la saturación de agua controlan críticamente el transporte de scCO2 en los nanocanales.
Los modelos analíticos predicen con precisión los comportamientos de flujo observados.
Los resultados proporcionan una base teórica para optimizar el scCO2-EOR en los depósitos.

Palabras clave:

El nanoconfinamiento En el caso de los gases de efecto invernadero flujo de dos fases viscosidad humedad

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