Estimating the hydraulic properties of the fracture network in a sandstone aquifer

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Estimating the hydraulic properties of the fracture network in a sandstone aquifer. / Hitchmough, A; Herbert, AW; Riley, Michael; Tellam, John.

In: Journal of Contaminant Hydrology, Vol. 93, 15.08.2007, p. 38-57.

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@article{6d58a2c5acb34ccebabeb37733bffc51,
title = "Estimating the hydraulic properties of the fracture network in a sandstone aquifer",
abstract = "The potential hydraulic behaviour of the fracture network in a major Triassic sandstone aquifer in the UK has been evaluated. The properties of the fracture network were determined using results from detailed scan line surveys at 10 sites, television and geophysical borehole logging, and packer testing. Six sets of discontinuities common to all sites were identified and statistically characterised (dip, strike, orientation, density, size, and estimated transmissivity). A discrete fracture network model was then used stochastically to investigate the properties of the network. In general, the network is poorly connected: it is estimated that 9% of the discontinuities intersecting boreholes are transmissive. The hydraulic behaviour of the network is generally dominated by one sub-horizontal bedding plane fracture set, although when present, a relatively infrequent north-south striking, sub-vertical set modifies the bulk flow properties significantly. Ignoring this latter set, the network's minimum representative volume is about 35 x 35 x 35 m. The upscaled permeability is anisotropic, being typically 23 times greater in the horizontal than in the vertical. Tortuosity in the north-south direction is around 1.6.",
keywords = "fractured rock, effective permeability, tortuosity, sandstone",
author = "A Hitchmough and AW Herbert and Michael Riley and John Tellam",
year = "2007",
month = aug,
day = "15",
doi = "10.1016/j.jconhyd.2007.01.012",
language = "English",
volume = "93",
pages = "38--57",
journal = "Journal of Contaminant Hydrology",
issn = "0169-7722",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Estimating the hydraulic properties of the fracture network in a sandstone aquifer

AU - Hitchmough, A

AU - Herbert, AW

AU - Riley, Michael

AU - Tellam, John

PY - 2007/8/15

Y1 - 2007/8/15

N2 - The potential hydraulic behaviour of the fracture network in a major Triassic sandstone aquifer in the UK has been evaluated. The properties of the fracture network were determined using results from detailed scan line surveys at 10 sites, television and geophysical borehole logging, and packer testing. Six sets of discontinuities common to all sites were identified and statistically characterised (dip, strike, orientation, density, size, and estimated transmissivity). A discrete fracture network model was then used stochastically to investigate the properties of the network. In general, the network is poorly connected: it is estimated that 9% of the discontinuities intersecting boreholes are transmissive. The hydraulic behaviour of the network is generally dominated by one sub-horizontal bedding plane fracture set, although when present, a relatively infrequent north-south striking, sub-vertical set modifies the bulk flow properties significantly. Ignoring this latter set, the network's minimum representative volume is about 35 x 35 x 35 m. The upscaled permeability is anisotropic, being typically 23 times greater in the horizontal than in the vertical. Tortuosity in the north-south direction is around 1.6.

AB - The potential hydraulic behaviour of the fracture network in a major Triassic sandstone aquifer in the UK has been evaluated. The properties of the fracture network were determined using results from detailed scan line surveys at 10 sites, television and geophysical borehole logging, and packer testing. Six sets of discontinuities common to all sites were identified and statistically characterised (dip, strike, orientation, density, size, and estimated transmissivity). A discrete fracture network model was then used stochastically to investigate the properties of the network. In general, the network is poorly connected: it is estimated that 9% of the discontinuities intersecting boreholes are transmissive. The hydraulic behaviour of the network is generally dominated by one sub-horizontal bedding plane fracture set, although when present, a relatively infrequent north-south striking, sub-vertical set modifies the bulk flow properties significantly. Ignoring this latter set, the network's minimum representative volume is about 35 x 35 x 35 m. The upscaled permeability is anisotropic, being typically 23 times greater in the horizontal than in the vertical. Tortuosity in the north-south direction is around 1.6.

KW - fractured rock

KW - effective permeability

KW - tortuosity

KW - sandstone

UR - http://www.scopus.com/inward/record.url?scp=34447647102&partnerID=8YFLogxK

U2 - 10.1016/j.jconhyd.2007.01.012

DO - 10.1016/j.jconhyd.2007.01.012

M3 - Article

C2 - 17346850

VL - 93

SP - 38

EP - 57

JO - Journal of Contaminant Hydrology

JF - Journal of Contaminant Hydrology

SN - 0169-7722

ER -