Particle blockage mechanism of a weakly consolidated sandstone geothermal reservoir during tailwater recharge

Xia, Jieqin; Dou, Bin; Tian, Hong; Xiao, Pan; Zheng, Jun; Lai, Xiaotian

doi:10.1016/j.jhydrol.2023.129981

Cited by 6 publications

(2 citation statements)

References 52 publications

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“…In the CO phase (130 < I ≤ 250), R i drops significantly for all particle sizes, suggesting a reduced impact of increasing hydraulic gradient on particle erosion. This is attributed to larger hydraulic gradients facilitating the movement of coarser particles, which leads to enhanced clogging via sieving and bridging (R. and thus inhibits particle migration (Xia et al, 2023;Y. Yin et al, 2024).…”

Section: Particle Migration Under Increasing Hydraulic Gradientmentioning

confidence: 99%

“…D. Ma et al (2019) explored the impact of particle migration on the hydraulic properties of sandstones, revealing a notable increase in porosity and hydraulic transmissivity in eroded sandstones. Han and Kwon (2023) and Xia et al (2023) underscored how particle migration leads to pore clogging in porous media, thereby reducing medium hydraulic transmissivity. In deserts and submarine settings, the intricate interplay of fluid dynamics, particle transport, and sediment bed evolution gives rise to patterns like dunes (Best, 2005), ripples (Charru et al, 2013;Lapotre et al, 2016), and granular avalanches (Gray & Chugunov, 2006).…”

Section: Introductionmentioning

confidence: 99%

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Fluid‐Driven Particle Migration and Its Impact on Hydraulic Transmissivity of Stressed Filled Fractures

Tan,

Li,

et al. 2024

JGR Solid Earth

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The accurate assessment of hydraulic transmissivity in rock fractures filled with particles is not only a scientific challenge but also a critical need for various industrial applications. However, the intricate dynamics of particle erosion and pore clogging that govern transmissivity evolution remain largely unexplored. In this study, we experimentally examine the fluid‐driven particle migration behavior in filled fractures and its consequent impact on fracture transmissivity under various hydraulic gradients, normal stresses, and fracture apertures. We find that escalating hydraulic gradients not only intensify particle erosion through amplified fluid drag forces and hydro‐mechanical coupling effects but also lead to an increase in the size of migrating particles, thereby augmenting pore clogging. The dynamics of erosion and clogging define four distinct migration phases within the filled fractures. Variations in normal stress and initial fracture aperture significantly alter the particle arrangement and the soil structure stability within the fractures, thereby modulating the progress of particle migration in response to hydraulic gradients. The pattern of particle migration in filled fractures dictates the development of the internal pore structure and normal deformation, ultimately affecting fracture transmissivity. We propose an empirical expression to encapsulate the comprehensive evolution of fracture transmissivity across different particle migration patterns. Our research advances the understanding of fluid‐driven particle migration within filled fractures and provides a practical tool for the precise determination of hydraulic properties of fractured rocks amidst complex geological settings.

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Section: Particle Migration Under Increasing Hydraulic Gradientmentioning

confidence: 99%