Time-Lapsed Visualization and Characterization of Shale Diffusion Properties Using 4D X-ray Microcomputed Tomography
Diffusion is an important mass transport mechanism in shale matrix, which usually has pore sizes ranging from molecular dimensions to micrometers. Better characterization of the diffusion properties is helpful in understanding the multiphysical mass transport process in shale. We present a method for measuring the local effective diffusivity of shale core plugs using four-dimensional (4D) X-ray microcomputed tomography (micro-CT). Liquid-liquid diffusion of X-ray-opaque CH2I2 from a Permian...[Show more]
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