Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9716469 | International Journal of Rock Mechanics and Mining Sciences | 2005 | 12 Pages |
Abstract
The results show that the probabilistic approach, relying on hydraulic data alone, may underestimate the true variability in fracture transmissivities, since the typically vertical boreholes entail a sampling bias towards horizontal fractures that are predominantly subject to vertical stress. The suggested method helps to account for the true underlying three-dimensional variability that is incompletely resolved by using the hydraulic borehole data alone. This method is likely to have the largest impact at low stress-levels, in strongly anisotropic stress-fields, for borehole directions parallel to one principal stress, and for fracture network geometries characterized by sets orthogonal to the three principal stresses.
Keywords
Related Topics
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Geotechnical Engineering and Engineering Geology
Authors
J. Ãhman, A. Niemi, C.-F. Tsang,