Journal
HYDROGEOLOGY JOURNAL
Volume 9, Issue 3, Pages 219-230Publisher
SPRINGER
DOI: 10.1007/s100400100135
Keywords
laboratory experiments; pore-throat size distribution; sandstones; groundwater contamination
Categories
Ask authors/readers for more resources
Pore-throat size distributions (PSDs) from mercury injection capillary pressure (MICP) tests have been used to characterise 153 samples of Permo-Triassic sandstones from the United Kingdom. The PSDs have been parameterised using the Brooks-Corey and van Genuchten functions. Pore-throat sizes are in the range 0.01-427 mum, and dominant pore-throat sizes range from about 0.1-90 mum. Values of lambda, the Brooks-Corey pore size distribution index, range from 0.002-2.27, and values of mi the van Genuchten pore-size distribution index, range from 0.03-0.92. A number of classes of sandstone can be recognised on the basis of trends in the fitted parameters. The van Genuchten function provides the most effective method for classifying different sandstones. Additionally, a cross-plot of gas permeability against displacement pressure (derived from the van Genuchten function) shows that the data fall into two distinct subpopulations. The frequency distribution of a larger population of sandstone permeabilities can be modelled using the mean and standard deviation of the two sub-populations identified in the MICP study, assuming that the sub-populations are approximated by log-normal distributions. The distribution of sandstones with small pore throat sizes is critical to the fate of pathogens and immiscible phase contaminants in the aquifer.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available