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Effective stress la...
Effective stress law for the permeability of clay-rich sandstones
- Article/chapterEnglish2004
Publisher, publication year, extent ...
Numbers
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LIBRIS-ID:oai:DiVA.org:kth-87455
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-87455URI
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https://doi.org/10.1029/2003JB002836DOI
Supplementary language notes
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Language:English
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Summary in:English
Part of subdatabase
Classification
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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QC 20120229
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Two models of clay-rich sandstones are analyzed to explain the relative sensitivity ofpermeability to pore pressure and confining pressure. In one model the clay lines the entire pore wall in a layer of uniform thickness, and in the second model the clay is distributed in the form of particles that are only weakly coupled to the pore walls. Equations of elasticity and fluid flow are solved for both models, giving expressions for theeffective stress coefficients in terms of clay content and the elastic moduli of the rock andclay. Both models predict that the permeability will be much more sensitive to changes in pore pressure than to changes in confining pressure. The clay particle model gives somewhat better agreement with data from the literature and with new data on a Staintonsandstone having a solid volume fraction of 8% clay.
Subject headings and genre
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Clay
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Effective stress
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Permeability
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Sandstones
Added entries (persons, corporate bodies, meetings, titles ...)
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Zimmerman, Robert WDept. of Earth Science/Engineering, Imperial Coll. of Sci. Technol./Med., London(Swepub:kth)u1fpp5iy
(author)
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Dept. of Earth Science/Engineering, Imperial Coll. of Sci. Technol./Med., London
(creator_code:org_t)
Related titles
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In:Journal of Geophysical Research109:4, s. 1-100148-02272156-2202
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