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Computational Modeling of the Influence of Geminal Zwitterionic Liquids on Changes in the Parameters of Wetting of Oil-Rock System

Published online by Cambridge University Press:  25 October 2012

Ernesto Lopez-Chavez ,
Luis Silvestre Zamudio-Rivera ,
Jose Manuel Martinez-Magadan ,
Eduardo Buenrostro-Gonzalez  and
Raúl Hernández-Altamirano
Ernesto Lopez-Chavez
Affiliation:
Colegio de Ciencia y Tecnología, Universidad Autónoma de la Ciudad de México. Fray Servando Teresa de Mier 92-110. Col Centro. México, D.F, 06080. México. Programa de Ingeniería Molecular, Instituto Mexicano del Petróleo. Eje Central Lázaro Cárdenas 152. Col San Bartolo Atepehuacan. México City, 07730. México.
Luis Silvestre Zamudio-Rivera
Affiliation:
Programa de Ingeniería Molecular, Instituto Mexicano del Petróleo. Eje Central Lázaro Cárdenas 152. Col San Bartolo Atepehuacan. México City, 07730. México.
Jose Manuel Martinez-Magadan
Affiliation:
Programa de Recuperación de Hidrocarburos, Instituto Mexicano del Petróleo. Eje Central Lázaro Cárdenas 152. Col San Bartolo Atepehuacan. México City, 07730. México.
Eduardo Buenrostro-Gonzalez
Affiliation:
Programa de Ingeniería Molecular, Instituto Mexicano del Petróleo. Eje Central Lázaro Cárdenas 152. Col San Bartolo Atepehuacan. México City, 07730. México.
Raúl Hernández-Altamirano
Affiliation:
Programa de Ingeniería Molecular, Instituto Mexicano del Petróleo. Eje Central Lázaro Cárdenas 152. Col San Bartolo Atepehuacan. México City, 07730. México.
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Abstract

Zwitterionic liquid (ZL) molecules are considered among the surfactant molecular species used in enhanced oil recovery (EOR). The surface activity of asphaltenes (ASP) is crucial for establishing reservoir rock wettability, which impacts enhanced oil recovery (EOR) process. The key to a successful EOR formulation is to carefully select the components that provide ultra-low interfacial tension (IFT) under reservoir conditions. Achieving ultra-low IFT greatly reduces capillary forces that trap oil. The objective of this work is the theoretical study of the influence of a class of germinal zwitterionic liquid on interfacial tension or changes on wettability of the oil-rock system under reservoir conditions. The ZL molecule used in this study was designed by Zamudio et al; while the asphaltene model was originally proposed by Buenrostro-González. Methods of molecular mechanics and dynamics were used in order to calculate interaction energies of all systems. The results indicate that the ZL molecule adheres more strongly to the limestone-rock than the asphaltene molecule does. In addition, our results suggest that the ion-pair formation is the dominant wettability alteration mechanism.

Keywords

ion-solid interactionssurface chemistryadhesion
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1473: Symposium BBB – Functional Materials and Ionic Liquids , 2012 , mrss12-1473-bbb05-13
Copyright
Copyright © Materials Research Society 2012

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References

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