HOW PERMEABLE ARE CLAYS ADD SHALES

被引:447
作者
NEUZIL, CE
机构
关键词
D O I
10.1029/93WR02930
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The permeability of argillaceous formations, although rarely measured and poorly understood, is commonly a critical parameter in analyses of Subsurface flow. Data now available suggest a regular relation between permeability and porosity in clays and shale's and permeabilities that, even at large scales, are significantly lower than usually assumed. Permeabilities between 10(-23) and 10(-17) m(2) have been obtained at Porosities between 0.1 and 0.4 in both laboratory and regional studies. Although it is clear that transmissive fractures or other heterogeneities control the large-scale hydraulic behavior of certain argillaceous units, the permeability of many others is apparently scale independent. These results have significant implications for understanding fluid transport rates and abnormal pressure generation in basins, and could prove important for waste isolation efforts.
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页码:145 / 150
页数:6
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