Hits:

Indexed by:期刊论文

Date of Publication:2016-05-01

Journal:MAGNETIC RESONANCE IMAGING

Included Journals:SCIE、PubMed

Volume:34

Issue:4

Page Number:437-441

ISSN No.:0730-725X

Key Words:Diffusivity; CO2; Porous media; Magnetic resonance imaging

Abstract:In this study, magnetic resonance imaging (MRI) was used to dynamically visualize the diffusion process of CO2 in porous media saturated with liquid hydrocarbon. Based on the assumption of semi-infinite media, effective CO2 diffusivity was obtained directly by the nonlinear fitting of one MR profile during the diffusion process. These experimental findings obtained based on MRI method showed a close agreement with the conventional pressure-volume-temperature method. The novel MRI-based technique is a time-saving approach that can reduce the duration of CO2 diffusivity measurement more than 90%, and realize rapid and accurate measurement and estimation of CO2 diffusivity. (C) 2015 Elsevier Inc. All rights reserved.