Experimental Measurement of CO2 Diffusion Coefficient in Porous Media Using NMR Micro-Imaging

DOI

10.2991/isesce-15.2015.67How to use a DOI?

Keywords

Diffusion coefficient; NMR; Porous media; Carbon dioxide

Abstract

In the recent years, using CO2 injection into oil reservoirs to enhanced oil recovery (CO2-EOR) has attracted more and more attention from industry and laboratory experiment. The mass transfer and diffusion of CO2 in oil is one of the key parameters of displacement process. In this study, by employing nuclear magnetic resonance (NMR) and a nonlinear fitting equation, the effective diffusion coefficient is calculated quantitatively. It proved that the experimental apparatus and mathematical procedure employed in this study were reliable to investigate and calculate the diffusion coefficient. Three main conclusions were obtained from this study: (i) the effective diffusion coefficient increases as the initial pressure increases; (ii) the relationship between CO2 diffusion coefficient and pressure is nonlinear;(iii) the temperature effect on diffusion of CO2 in oil is obvious because of the reduction in oil viscosity.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Junlin Chen
AU  - Yuechao Zhao
AU  - Yongchen Song
AU  - Di Wu
AU  - Dayong Wang
PY  - 2015/12
DA  - 2015/12
TI  - Experimental Measurement of CO2 Diffusion Coefficient in Porous Media Using NMR Micro-Imaging
BT  - Proceedings of the 2015 International Symposium on Energy Science and Chemical Engineering
PB  - Atlantis Press
SP  - 329
EP  - 332
SN  - 2352-5401
UR  - https://doi.org/10.2991/isesce-15.2015.67
DO  - 10.2991/isesce-15.2015.67
ID  - Chen2015/12
ER  -