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发布时间：2019-03-13

论文类型：期刊论文

发表时间：2016-05-01

发表刊物：MAGNETIC RESONANCE IMAGING

收录刊物：PubMed、SCIE

卷号：34

期号：4

页面范围：437-441

ISSN号：0730-725X

关键字：Diffusivity; CO2; Porous media; Magnetic resonance imaging

摘要：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.