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Molecular insight into replacement dynamics of CO2 enhanced oil recovery in nanopores by Runxi Wang; Sheng Bi; Zhaoli Guo; Guang Feng is a Engineering article available to read on EtoBox.

What is Molecular insight into replacement dynamics of CO2 enhanced oil recovery in nanopores about?

Nanopores are widely found in unconventional reservoirs, and the effect of nanoconfinement on CO 2 enhanced oil recovery is still not fully understood. In this work, we have studied the kinetics of alkane replacement using CO 2 in micropores (<2 nm) using molecular dynamics simulations. We found that the microstructures (number and density of adsorption layers) of n-decane in micropores changes dramatically with the pore size, leading to oscillations in the density and diffusivity of n-decane in the pores. A diffusion model was proposed to describe the replacement process of CO 2 and analyze the different replacement mechanisms under different pore sizes. The structure change pattern and replacement efficiency were examined to show the superiority of microporosity in mining. This work paves a new way to explore the replacement mechanism in micropores, demonstrating the importance of micropores in CO 2 enhanced oil recovery.

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Author

Runxi Wang; Sheng Bi; Zhaoli Guo; Guang Feng

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Engineering (Physical Sciences)