An efficient embedded discrete fracture model based on the unstructured quadrangular grid

Zhang, Hao; Sheng, James J.

doi:10.1016/j.jngse.2020.103710

Cited by 8 publications

(3 citation statements)

References 27 publications

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“…Researchers are still seeking a model suitable for addressing seepage problems in multiscale fractured porous media. 17,18 Yan et al 19 proposed a mixed fracture-pore model based on the finite-discrete element method (FDEM), which successfully simulated the hydraulic fracturing problem in porous media. Xia et al 20 established a porous media seepage model with intersecting fractures based on the extended finite element method.…”

Section: Introductionmentioning

confidence: 99%

“…The dual or multiple porosity model assumes that the seepage in fractured porous media can be explained by assigning different permeabilities to porous and fractured media, with transfer functions describing the fluid exchange between porous media and fractured media. Researchers are still seeking a model suitable for addressing seepage problems in multiscale fractured porous media 17,18 . Yan et al 19 …”

Section: Introductionmentioning

confidence: 99%

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Peridynamic modeling of seepage in multiscale fractured rigid porous media

Cai,

Zhang,

et al. 2024

Num Anal Meth Geomechanics

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The numerical simulation of seepage in fractured porous media holds significant relevance for subsurface energy development. The presence of fractures at various scales profoundly influences the hydraulic properties of porous media during seepage. A peridynamic (PD)‐based frame is proposed for the seepage problem analysis of multiscale fractured porous media, in which micro‐fractures are implicitly represented like the porous media, macro‐fractures are explicitly represented. For fluid flow modeling, the peridynamic bonds are divided into three types: pore seepage bond, fracture seepage bond, and fluid exchange bond. The micro‐permeabilities of different bonds are derived by Darcy's law, Poiseuille's law, and fluid exchange model, respectively. The proposed peridynamic model can naturally simulate the seepage problem of porous rock with multiscale fractures in a unified framework. Then, four cases of pore seepage and fracture seepage are analyzed using the proposed model, fractured porous media seepage with micro‐fractures and macro‐fractures are respectively considered. The predicted results are compared with the available theoretical solutions, the close agreement shows that the wide validity and applicability of the proposed model in multiscale seepage problems.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Peridynamic modeling of seepage in multiscale fractured rigid porous media

Cai,

Zhang,

et al. 2024

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

show abstract

“…To this end, the discrete fracture network (DFN) has been proposed (Long and Billaux, 1987;Cacas et al, 1990), such that the discrete fractures can be explicitly represented. Afterwards, many models have been developed based on DFN (Zhang and Sheng, 2021;Huang et al, 2021a;Graf and Therrien, 2008;Mustapha et al, 2011;Fumagalli et al, 2019). Nevertheless, the drawback of this model is that fluid flow is assumed only in the fracture networks, while the matrix is impermeable.…”

Section: Introductionmentioning

confidence: 99%