Numerical modeling of drying from saturated to unsaturated conditions with two-phase partitioning boundaries at the medium surface and interface-dependent phase change

Zheng, Qi-Teng; Yang, Chun-Bai-Xue; Feng, Shi-Jin; Song, Yu-Chen; Zhao, Yong; Wu, Yu-Lin

doi:10.1016/j.ijmultiphaseflow.2023.104671

International Journal of Multiphase Flow

2024

DOI: 10.1016/j.ijmultiphaseflow.2023.104671

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Numerical modeling of drying from saturated to unsaturated conditions with two-phase partitioning boundaries at the medium surface and interface-dependent phase change

Qi-Teng Zheng,

Chun-Bai-Xue Yang,

Shi-Jin Feng

et al.

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Effect of fracture distribution on extraction efficiency in low-permeability NAPL-contaminated formations

Niu,

Feng,

Zheng

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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Hydraulic fracturing offers an effective solution to the challenge of remediating low-permeability contaminated formations by improving substance transport rates. In this study, COMSOL Multiphysics, a large-scale multi-physics coupled simulation software, was employed to simulate enhanced extraction and remediation of low permeability non-aqueous phase liquid (NAPL)-contaminated formations using hydraulic fractures. The results obtained indicate that fracturing and enhanced extraction can effectively improve the NAPL removal rate. The NAPL removal rate increased with increasing depth of the extraction well screens, fracture length, and fracture spacing. Through a coupling analysis of multiple factors and working conditions, the extraction well screens are suggested to be buried within the lower one-third of the low-permeability contaminated formation, and the length of a single fracture should be within 50%–80% of the extraction radius. When the distance between the two fractures was greater than 1.75 m, the enhancement effect of the fracture length was further promoted. Consequently, a reasonable configuration of fracture length, quantity, and spacing can effectively broaden the influence radius of extraction wells.

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Effect of fracture distribution on extraction efficiency in low-permeability NAPL-contaminated formations

Niu,

Feng,

Zheng

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

show abstract

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Numerical modeling of drying from saturated to unsaturated conditions with two-phase partitioning boundaries at the medium surface and interface-dependent phase change

Cited by 1 publication

References 45 publications

Effect of fracture distribution on extraction efficiency in low-permeability NAPL-contaminated formations

Effect of fracture distribution on extraction efficiency in low-permeability NAPL-contaminated formations

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