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Effect of Clay Minerals on Miscible and Immiscible Viscous Fingering during Polymer Flooding

Vishnudas. R and Abhijit Chaudhuri
Department Of Applied Mechanics, Indian Institute of Technology Madras, Chennai, India
Abstract—During polymer flooding a considerable amount of polymer may be lost due to adsorption into the reservoir rock. These reservoir rocks contain clay minerals, which affect the propagation of injected polymers. In this numerical study we have investigated the effect of different clay minerals on dynamics of miscible and immiscible viscous fingering. Since polymer adsorption rate is different for different clay minerals, it is important to know that how clay minerals influence the fingering pattern at both miscible and immiscible interface during polymer flooding, which is followed by water flooding. Clay minerals play a major role in oil recovery process and it affects the displacement efficiency as well. There is lack of information regarding the nonlinear adsorption effect of polymer on instability in the literature. We provide numerical results for nonlinear adsorption of polymer onto the porous matrix, since a nonlinear Langmuir sorption isotherm is more suitable model for polymer adsorption. By comparing the results for Kaolinite and Illite, it is observed that growth rate and number of miscible viscous fingers more for Kaolinite clay minerals. On contrary the number of immiscible viscous fingers at the saturation shock between connate water and oil is less for Kaolinite.

Index Terms—polymer flooding, adsorption, viscous fingering, clay minerals, connate water

Cite: Vishnudas. R and Abhijit Chaudhuri, "Effect of Clay Minerals on Miscible and Immiscible Viscous Fingering during Polymer Flooding," Journal of Industrial and Intelligent Information, Vol. 2, No. 4, pp. 252-258, December 2014. doi: 10.12720/jiii.2.4.252-258
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