Flow-bearing structures of fractured rocks: Insights from hydraulic property scalings revealed by a pumping test
نویسندگان
چکیده
A long duration pumping test conducted over 151 days in a fractured sandstone and shale formation displays nonstandard drawdown response anomalous pressure diffusion, which cannot be properly interpreted using existing frameworks (e.g., homogeneous, double porosity, boundary conditions, fractal models). An alternative framework with simple geometry more complex hydraulic properties is thus proposed to interpret such kind of responses. The analytical development allows first demonstrate all scaling relations this interpretation framework. Then, most importantly, the multi-scale provides consistent scalings transmissivity, T, storativity, S, distances ranging from 83 383 m faulted area. Drawdown analysis several monitoring wells shows persistent decrease transmissivity highly channelized fracture flow structures. In one structure, cubic dependency storativity identifies well-defined fault also demonstrates validity Poiseuille at scale rarely investigated. other linear indicates that flow-bearing structure surrounding network. Well-designed tests combined driven by geological evidence provide essential information on structures for site characterization modeling tasks. At least moderate low permeable rocks, appears informative than any separate property exponents.
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ژورنال
عنوان ژورنال: Journal of Hydrology
سال: 2021
ISSN: ['2589-9155']
DOI: https://doi.org/10.1016/j.jhydrol.2020.125715