Analysis of Microstructure and Low Permeability with 3D Digital Rock Modeling

Abstract

The sandstone microstructure and permeability are important parameters for quantitative evaluation of groundwater/oil/gas resources and prediction of flow rates of water/oil/gas. In this study, we applied seven low-permeability sandstone samples obtained from North China to research the microstructure and permeability based on digital core technology. Rock images were collected by X-ray microcomputed tomography (μCT), and then software (Avizo) was applied to analyze the microstructure and calculate the parameters such as porosity, connected porosity, average equivalent diameter, tortuosity, and shape factor. By introducing the shape factor into the Kozeny–Carman equation, we modified the Kozeny–Carman equation and found that the modified equation is a function of porosity, diameter of particles, tortuosity, and particle shape factor.

The influence of structural topology of additively manufactured PEGDA monolith on adsorption performance for textile wastewater treatment

“…Permeability is the primary correlation between the microstructure and macroscopic physical characteristics of the pores in lattice media. It was influenced not only by the topological structure but also by the geometry or shape of the pore design 55 . In this work, the porosity value, , was set as 90% for all structural topologies as the correlation between permeability and porosity has been optimized by Reduan et al 56 As depicted in Table 3.3, for strut‐based design with more simple and straight porosity, body‐centered design has the highest permeability compared with other structural topologies, which allows the liquid to flow through easily.…”