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- W4308518929 endingPage "128704" @default.
- W4308518929 startingPage "128704" @default.
- W4308518929 abstract "Pore-scale permeability and diffusivity are two paramount parameters to determine the hydraulic and transport properties in porous geomaterials. To well understand pore-scale variations of hydraulic and transport properties of porous geomaterials, this work proposes a digital microscopic analysis framework, in which pore-scale variables such as porosity and tortuosity are defined according to X-μCT datasets of 9 types of sandstones with 3 types of fine pores, median pores and coarse pores. A multi-types pore-structure analysis with Levenberg-Marquardt algorithm is conducted to establish the tortuosity-pore-scale variable relations and to study their effects on pore-scale permeability and diffusivity. Results show that the tortuosity decreases with increasing pore comprehensive effect index (PCEI), which is characterized by porosity, pore size and shape factor. The established pore seepage and diffusion factors are more effective to characterize the pore geometry and connectivity. The established tortuosity-PCEI, permeability-pore seepage factor and diffusivity-pore diffusion factor relations show higher performance for pore-scale permeability and diffusivity evaluations of geomaterials, whose accuracy are validated by the experiments and the pervious works. The proposed digital microscopic analysis framework is more effective to evaluate hydraulic and transport properties with less experimental efforts, which is helpful for the geothermal and shale gas-oil explorations." @default.
- W4308518929 created "2022-11-12" @default.
- W4308518929 creator A5010767645 @default.
- W4308518929 creator A5042974395 @default.
- W4308518929 date "2022-12-01" @default.
- W4308518929 modified "2023-09-25" @default.
- W4308518929 title "Pore-scale diffusivity and permeability evaluations in porous geomaterials using multi-types pore-structure analysis and X-μCT imaging" @default.
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- W4308518929 doi "https://doi.org/10.1016/j.jhydrol.2022.128704" @default.
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